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Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
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1

PROJECT SPECIFIC CATEGORICAL EXCLUSION FOR A WAVE GLIDER-BASED PASSIVE ACOUSTIC DETECTION SYSTEM,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

SPECIFIC CATEGORICAL EXCLUSION FOR A WAVE SPECIFIC CATEGORICAL EXCLUSION FOR A WAVE GLIDER-BASED PASSIVE ACOUSTIC DETECTION SYSTEM, Attachment PACIFIC NORTHWEST NATIONAL LABORATORY, RICHLAND, WASHINGTON Proposed Action Pacific Northwest National Laboratory (PNNL) proposes to conduct a proof-of-principle study to develop a wave glider-based passive acoustic detection system for monitoring whale populations (e.g., presence, distribution, relative abundance). Long-term goals of the project include better understanding whale populations to facilitate environmentally responsible development of offshore energy and improving the capability to monitor the world's oceans. Location of Action The proposed action would occur at PNNL facilities in Richland, Washington; at the Marine Science Laboratory

2

Acoustic Inspection Devices: Detecting the Undetectable  

Acoustic Inspection Devices: Detecting the Undetectable Emerging homeland security threats and increasingly sophisticated adversaries have heightened ...

3

Oceanic Rainfall Detection and Classification in Tropical and Subtropical Mesoscale Convective Systems Using Underwater Acoustic Methods  

Science Conference Proceedings (OSTI)

Measurements of the underwater sound produced by rain were made at three U.S. coastal sites in a study to determine the feasibility and limitations of the acoustic detection and classification of rainfall over water. In the analysis of the rain ...

Peter G. Black; John R. Proni; John C. Wilkerson; Christopher E. Samsury

1997-09-01T23:59:59.000Z

4

A cabled acoustic telemetry system for detecting and tracking juvenile salmon: Part 1. Engineering design and instrumentation  

Science Conference Proceedings (OSTI)

The U.S. Army Corps of Engineers-Portland District started development of the Juvenile Salmon Acoustic Telemetry System (JSATS), a nonproprietary technology, in 2001 to meet the needs for monitoring the survival of juvenile salmonids through the 31 federal dams in the Federal Columbia River Power System (FCRPS). Initial development focused on coded acoustic microtransmitters, and autonomous receivers that could be deployed in open reaches of the river for detection of the juvenile salmonids implanted with microtransmitters as they passed the autonomous receiver arrays. In 2006 the Pacific Northwest National Laboratory (PNNL) was tasked with development of an acoustic receiver system for deployment at hydropower facilities (cabled receiver) for detecting fish tagged with microtransmitters as well as tracking them in 2 or 3-dimensions as the fish passed at the facility for determining route of passage. The additional route of passage information, combined with survival estimates, is used by the dam operators and managers to make structural and operational changes at the hydropower facilities to improve survival of fish as they pass the facilities and through the FCRPS.

Weiland, Mark A.; Deng, Zhiqun; Seim, Thomas A.; Lamarche, Brian L.; Choi, Eric Y.; Fu, Tao; Carlson, Thomas J.; Thronas, Aaron I.; Eppard, Matthew B.

2011-05-26T23:59:59.000Z

5

A Cabled Acoustic Telemetry System for Detecting and Tracking Juvenile Salmon: Part 2. Three-Dimensional Tracking and Passage Outcomes  

SciTech Connect

In Part 1 of this paper [1], we presented the engineering design and instrumentation of the Juvenile Salmon Acoustic Telemetry System (JSATS) cabled system, a nonproprietary technology developed by the U.S. Army Corps of Engineers, Portland District, to meet the needs for monitoring the survival of juvenile salmonids through the 31 dams in the Federal Columbia River Power System. Here in Part 2, we describe how the JSATS cabled system was employed as a reference sensor network for detecting and tracking juvenile salmon. Time-of-arrival data for valid detections on four hydrophones were used to solve for the three-dimensional (3D) position of fish surgically implanted with JSATS acoustic transmitters. Validation tests demonstrated high accuracy of 3D tracking up to 100 m from the John Day Dam spillway. The along-dam component, used for assigning the route of fish passage, had the highest accuracy; the median errors ranged from 0.06 to 0.22 m, and root mean square errors ranged from 0.05 to 0.56 m at distances up to 100 m. For the case study at John Day Dam during 2008, the range for 3D tracking was more than 100 m upstream of the dam face where hydrophones were deployed, and detection and tracking probabilities of fish tagged with JSATS acoustic transmitters were higher than 98%. JSATS cabled systems have been successfully deployed on several major dams to acquire information for salmon protection and for development of more “fish-friendly” hydroelectric facilities.

Deng, Zhiqun; Weiland, Mark A.; Fu, Tao; Seim, Thomas A.; Lamarche, Brian L.; Choi, Eric Y.; Carlson, Thomas J.; Eppard, Matthew B.

2011-05-26T23:59:59.000Z

6

Acoustic imaging system  

DOE Patents (OSTI)

An acoustic imaging system for displaying an object viewed by a moving array of transducers as the array is pivoted about a fixed point within a given plane. A plurality of transducers are fixedly positioned and equally spaced within a laterally extending array and operatively directed to transmit and receive acoustic signals along substantially parallel transmission paths. The transducers are sequentially activated along the array to transmit and receive acoustic signals according to a preestablished sequence. Means are provided for generating output voltages for each reception of an acoustic signal, corresponding to the coordinate position of the object viewed as the array is pivoted. Receptions from each of the transducers are presented on the same display at coordinates corresponding to the actual position of the object viewed to form a plane view of the object scanned.

Smith, Richard W. (Richland, WA)

1979-01-01T23:59:59.000Z

7

Acoustic detection of partial discharges in insulation oil  

Science Conference Proceedings (OSTI)

In this paper, we performed an insulation diagnosis technique for oil-immersed power transformers by an acoustic detection method. Electrode system such as needle to plane electrode was fabricated to simulate a defect of power transformers. In addition, ... Keywords: acoustic detection, frequency component, insulation diagnostic, partial discharge, positioning

Dae-Won Park; Sang-Wook Cha; Gyung-Suk Kil

2011-03-01T23:59:59.000Z

8

Acoustics sound systems for baseball  

Science Conference Proceedings (OSTI)

Acoustic considerations impact the design of sound systems for baseball stadiums in several important ways. Intrusion by the sound system into adjacent residential communities must often be minimized. Excess attenuation greatly increases the required high frequency component of acoustic power for sound travelling long distances

2001-01-01T23:59:59.000Z

9

Investigating acoustic cues in automatic detection of learners' emotion from auto tutor  

Science Conference Proceedings (OSTI)

This study investigates the emotion-discriminant ability of acoustic cues from speech collected in the automatic computer tutoring system named as Auto Tutor. The purpose of this study is to examine the acoustic cues for emotion detection of the speech ... Keywords: acoustic features, auto tutor, emotion detection, humancomputer interaction, speech

Rui Sun; Elliot Moore

2011-10-01T23:59:59.000Z

10

Early Tube Leak Detection in a HRSG Application Using Acoustic Monitoring Technology  

Science Conference Proceedings (OSTI)

Acoustic monitoring has become an essential part of early tube leak detection for conventional boilers. Acoustic monitoring is intended for steam leak detection in pressurized vessels, including power boilers, recovery boilers, and feedwater heaters. The system performs acoustic monitoring by continuously measuring the internal sounds from the boiler, signaling an alarm when the sound exceeds a preset threshold for a ...

2012-12-12T23:59:59.000Z

11

Acoustic enhancement for photo detecting devices  

DOE Patents (OSTI)

Provided are improvements to photo detecting devices and methods for enhancing the sensitivity of photo detecting devices. A photo detecting device generates an electronic signal in response to a received light pulse. An electro-mechanical acoustic resonator, electrically coupled to the photo detecting device, damps the electronic signal and increases the signal noise ratio (SNR) of the electronic signal. Increased photo detector standoff distances and sensitivities will result.

Thundat, Thomas G; Senesac, Lawrence R; Van Neste, Charles W

2013-02-19T23:59:59.000Z

12

ACOUSTIC DETECTING AND LOCATING GAS PIPE LINE INFRINGEMENT  

Science Conference Proceedings (OSTI)

The extensive network of high-pressure natural gas transmission pipelines covering the United States provides an important infrastructure for our energy independence. Early detection of pipeline leaks and infringements by construction equipment, resulting in corrosion fractures, presents an important aspect of our national security policy. The National Energy Technology Laboratory Strategic Center for Natural Gas (SCVG) is and has been funding research on various applicable techniques. The WVU research team has focused on monitoring pipeline background acoustic signals generated and transmitted by gas flowing through the gas inside the pipeline. In case of a pipeline infringement, any mechanical impact on the pipe wall, or escape of high-pressure gas, generates acoustic signals traveling both up and down stream through the gas. Sudden changes in flow noise are detectable with a Portable Acoustic Monitoring Package (PAMP), developed under this contract. It incorporates a pressure compensating microphone and a signal- recording device. Direct access to the gas inside the line is obtained by mounting such a PAMP, with a 1/2 inch NPT connection, to a pipeline pressure port found near most shut-off valves. An FFT of the recorded signal subtracted by that of the background noise recorded one-second earlier appears to sufficiently isolate the infringement signal to allow source interpretation. Using cell phones for data downloading might allow a network of such 1000-psi rated PAMP's to acoustically monitor a pipeline system and be trained by neural network software to positively identify and locate any pipeline infringement.

John L. Loth; Gary J. Morris; George M. Palmer; Richard Guiler; Patrick Browning

2004-12-01T23:59:59.000Z

13

ACOUSTIC DETECTING AND LOCATING GAS PIPE LINE INFRINGEMENT  

Science Conference Proceedings (OSTI)

The extensive network of high-pressure natural gas transmission pipelines covering the United States provides an important infrastructure for our energy independence. Early detection of pipeline leaks and infringements by construction equipment, resulting in corrosion fractures, presents an important aspect of our national security policy. The National Energy Technology Laboratory Strategic Center for Natural Gas (SCVG) is and has been funding research on various applicable techniques. The WVU research team has focused on monitoring pipeline background acoustic signals generated and transmitted by gas flowing through the gas inside the pipeline. In case of a pipeline infringement, any mechanical impact on the pipe wall, or escape of high-pressure gas, generates acoustic signals traveling both up and down stream through the gas. Sudden changes in flow noise are detectable with a Portable Acoustic Monitoring Package (PAMP), developed under this contract. It incorporates a pressure compensating microphone and a signal- recording device. Direct access to the gas inside the line is obtained by mounting such a PAMP, with a 1/2 inch NPT connection, to a pipeline pressure port found near most shut-off valves. An FFT of the recorded signal subtracted by that of the background noise recorded one-second earlier appears to sufficiently isolate the infringement signal to allow source interpretation. Using cell phones for data downloading might allow a network of such 1000-psi rated PAMP's to acoustically monitor a pipeline system and be trained by neural network software to positively identify and locate any pipeline infringement.

John L. Loth; Gary J. Morris; George M. Palmer; Richard Guiler; Patrick Browning

2004-10-31T23:59:59.000Z

14

Underwater Acoustic Detection of Ultra High Energy Neutrinos  

E-Print Network (OSTI)

We investigate the acoustic detection method of 10^18-20 eV neutrinos in a Mediterranean Sea environment. The acoustic signal is re-evaluated according to dedicated cascade simulations and a complex phase dependant absorption model, and compared to previous studies. We detail the evolution of the acoustic signal as function of the primary shower characteristics and of the acoustic propagation range. The effective volume of detection for a single hydrophone is given taking into account the limitations due to sea bed and surface boundaries as well as refraction effects. For this 'benchmark detector' we present sensitivity limits to astrophysical neutrino fluxes, from which sensitivity bounds for a larger acoustic detector can be derived. Results suggest that with a limited instrumentation the acoustic method would be more efficient at extreme energies, above 10^20 eV.

V. Niess; V. Bertin

2005-11-21T23:59:59.000Z

15

Method and apparatus of spectro-acoustically enhanced ultrasonic detection for diagnostics  

SciTech Connect

An apparatus for detecting a discontinuity in a material includes a source of electromagnetic radiation has a wavelength and an intensity sufficient to induce an enhancement in contrast between a manifestation of an acoustic property in the material and of the acoustic property in the discontinuity, as compared to when the material is not irradiated by the electromagnetic radiation. An acoustic emitter directs acoustic waves to the discontinuity in the material. The acoustic waves have a sensitivity to the acoustic property. An acoustic receiver receives the acoustic waves generated by the acoustic emitter after the acoustic waves have interacted with the material and the discontinuity. The acoustic receiver also generates a signal representative of the acoustic waves received by the acoustic receiver. A processor, in communication with the acoustic receiver and responsive to the signal generated by the acoustic receiver, is programmed to generate informational output about the discontinuity based on the signal generated by the acoustic receiver.

Vo-Dinh, Tuan (Knoxville, TN); Norton, Stephen J. (Raleigh, NC)

2001-01-01T23:59:59.000Z

16

DETECTION OF DRUGSTORE BEETLES IN 9975 PACKAGES USING ACOUSTIC EMISSIONS  

SciTech Connect

This report documents the initial feasibility tests performed using a commercial acoustic emission instrument for the purpose of detecting beetles in Department of Energy 9975 shipping packages. The device selected for this testing was a commercial handheld instrument and probe developed for the detection of termites, weevils, beetles and other insect infestations in wooden structures, trees, plants and soil. The results of two rounds of testing are presented. The first tests were performed by the vendor using only the hand-held instrument’s indications and real-time operator analysis of the audio signal content. The second tests included hands-free positioning of the instrument probe and post-collection analysis of the recorded audio signal content including audio background comparisons. The test results indicate that the system is promising for detecting the presence of drugstore beetles, however, additional work would be needed to improve the ease of detection and to automate the signal processing to eliminate the need for human interpretation. Mechanisms for hands-free positioning of the probe and audio background discrimination are also necessary for reliable detection and to reduce potential operator dose in radiation environments.

Shull, D.

2013-03-04T23:59:59.000Z

17

Copper vapor laser acoustic thermometry system  

DOE Patents (OSTI)

A copper vapor laser (CVL) acoustic thermometry system is disclosed. The invention couples an acoustic pulse a predetermined distance into a laser tube by means of a transducer and an alumina rod such that an echo pulse is returned along the alumina rod to the point of entry. The time differential between the point of entry of the acoustic pulse into the laser tube and the exit of the echo pulse is related to the temperature at the predetermined distance within the laser tube. This information is processed and can provide an accurate indication of the average temperature within the laser tube.

Galkowski, J.J.

1986-08-27T23:59:59.000Z

18

Systems and methods for biometric identification using the acoustic properties of the ear canal  

DOE Patents (OSTI)

The present invention teaches systems and methods for verifying or recognizing a person's identity based on measurements of the acoustic response of the individual's ear canal. The system comprises an acoustic emission device, which emits an acoustic source signal s(t), designated by a computer, into the ear canal of an individual, and an acoustic response detection device, which detects the acoustic response signal f(t). A computer digitizes the response (detected) signal f(t) and stores the data. Computer-implemented algorithms analyze the response signal f(t) to produce ear-canal feature data. The ear-canal feature data obtained during enrollment is stored on the computer, or some other recording medium, to compare the enrollment data with ear-canal feature data produced in a subsequent access attempt, to determine if the individual has previously been enrolled. The system can also be adapted for remote access applications.

Bouchard, Ann Marie (Albuquerque, NM); Osbourn, Gordon Cecil (Albuquerque, NM)

1998-01-01T23:59:59.000Z

19

Acoustic microscope surface inspection system and method  

DOE Patents (OSTI)

An acoustic microscope surface inspection system and method in which pulses of high frequency electrical energy are applied to a transducer which forms and focuses acoustic energy onto a selected location on the surface of an object and receives energy from the location and generates electrical pulses. The phase of the high frequency electrical signal pulses are stepped with respected to the phase of a reference signal at said location. An output signal is generated which is indicative of the surface of said selected location. The object is scanned to provide output signals representative of the surface at a plurality of surface locations.

Khuri-Yakub, Butrus T. (Palo Alto, CA); Parent, Philippe (Chilly-Mazarin, FR); Reinholdtsen, Paul A. (Seattle, WA)

1991-01-01T23:59:59.000Z

20

Artificial recognition system for defective types of transformers by acoustic emission  

Science Conference Proceedings (OSTI)

An artificial recognition system of defective types for epoxy-resin transformers through acoustic emission (AE) from partial discharge (PD) experiment is proposed. PD detection is an efficient diagnosis method to prevent the failure of electric equipments ... Keywords: Acoustic emission, Neural network, Partial discharge, Particle swarm optimization, Transformer

Cheng-Chien Kuo

2009-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Feasibility of impact-acoustic emissions for detection of damaged wheat kernels  

Science Conference Proceedings (OSTI)

A non-destructive, real time device was developed to detect insect damage, sprout damage, and scab damage in kernels of wheat. Kernels are impacted onto a steel plate and the resulting acoustic signal analyzed to detect damage. The acoustic signal was ... Keywords: Acoustic emissions, Insect damage kernels, Neural network, Sorting, Spectral analysis

Tom C. Pearson; A. Enis Cetin; Ahmed H. Tewfik; Ron P. Haff

2007-05-01T23:59:59.000Z

22

System and method for characterizing voiced excitations of speech and acoustic signals, removing acoustic noise from speech, and synthesizing speech  

DOE Patents (OSTI)

The present invention is a system and method for characterizing human (or animate) speech voiced excitation functions and acoustic signals, for removing unwanted acoustic noise which often occurs when a speaker uses a microphone in common environments, and for synthesizing personalized or modified human (or other animate) speech upon command from a controller. A low power EM sensor is used to detect the motions of windpipe tissues in the glottal region of the human speech system before, during, and after voiced speech is produced by a user. From these tissue motion measurements, a voiced excitation function can be derived. Further, the excitation function provides speech production information to enhance noise removal from human speech and it enables accurate transfer functions of speech to be obtained. Previously stored excitation and transfer functions can be used for synthesizing personalized or modified human speech. Configurations of EM sensor and acoustic microphone systems are described to enhance noise cancellation and to enable multiple articulator measurements.

Burnett, Greg C. (Livermore, CA); Holzrichter, John F. (Berkeley, CA); Ng, Lawrence C. (Danville, CA)

2006-08-08T23:59:59.000Z

23

System And Method For Characterizing Voiced Excitations Of Speech And Acoustic Signals, Removing Acoustic Noise From Speech, And Synthesizi  

DOE Patents (OSTI)

The present invention is a system and method for characterizing human (or animate) speech voiced excitation functions and acoustic signals, for removing unwanted acoustic noise which often occurs when a speaker uses a microphone in common environments, and for synthesizing personalized or modified human (or other animate) speech upon command from a controller. A low power EM sensor is used to detect the motions of windpipe tissues in the glottal region of the human speech system before, during, and after voiced speech is produced by a user. From these tissue motion measurements, a voiced excitation function can be derived. Further, the excitation function provides speech production information to enhance noise removal from human speech and it enables accurate transfer functions of speech to be obtained. Previously stored excitation and transfer functions can be used for synthesizing personalized or modified human speech. Configurations of EM sensor and acoustic microphone systems are described to enhance noise cancellation and to enable multiple articulator measurements.

Burnett, Greg C. (Livermore, CA); Holzrichter, John F. (Berkeley, CA); Ng, Lawrence C. (Danville, CA)

2006-04-25T23:59:59.000Z

24

Speaker verification system using acoustic data and non-acoustic data  

DOE Patents (OSTI)

A method and system for speech characterization. One embodiment includes a method for speaker verification which includes collecting data from a speaker, wherein the data comprises acoustic data and non-acoustic data. The data is used to generate a template that includes a first set of "template" parameters. The method further includes receiving a real-time identity claim from a claimant, and using acoustic data and non-acoustic data from the identity claim to generate a second set of parameters. The method further includes comparing the first set of parameters to the set of parameters to determine whether the claimant is the speaker. The first set of parameters and the second set of parameters include at least one purely non-acoustic parameter, including a non-acoustic glottal shape parameter derived from averaging multiple glottal cycle waveforms.

Gable, Todd J. (Walnut Creek, CA); Ng, Lawrence C. (Danville, CA); Holzrichter, John F. (Berkeley, CA); Burnett, Greg C. (Livermore, CA)

2006-03-21T23:59:59.000Z

25

A juvenile salmon acoustic tracking system (JSATS) for the Columbia River estuary  

Science Conference Proceedings (OSTI)

The Juvenile Salmon Acoustic Tracking System (JSATS) was developed as a means to estimate the downriver survivability of sub?yearling salmon in the Columbia River. The system consists of a bottom?mounted sonar array which detects signals from acoustic projectors that are surgically implanted in juvenile salmon. JSATS is the result of a development program which began in 2001 when Northwest Fisheries Science Center National Marine Fisheries Service (NMFS) and Science Applications International Corp. (SAIC) developed the top level

2005-01-01T23:59:59.000Z

26

WIRELESS MICROWAVE ACOUSTIC SENSOR SYSTEM FOR CONDITION MONITORING...  

NLE Websites -- All DOE Office Websites (Extended Search)

WIRELESS MICROWAVE ACOUSTIC SENSOR SYSTEM FOR CONDITION MONITORING IN POWER PLANT ENVIRONMENTS Project DE-FE0007379TDD NETL, Morgantown, WV, March 14, 2012. DOE NETL Program:...

27

Use of an acoustic network as an underwater positioning system .  

E-Print Network (OSTI)

??Underwater acoustic networks provide an interface between UUVs and surface or land-based control systems. By exploiting range data measured incidental to communications on these networks… (more)

Reed, Michael S.

2006-01-01T23:59:59.000Z

28

Fuel washout detection system  

DOE Patents (OSTI)

A system for detecting grossly failed reactor fuel by detection of particulate matter as accumulated on a filter.

Colburn, Richard P. (Pasco, WA)

1985-01-01T23:59:59.000Z

29

Electret Acoustic Transducer Array For Computerized Ultrasound Risk Evaluation System  

DOE Patents (OSTI)

An electret-based acoustic transducer array is provided and may be used in a system for examining tissue. The acoustic transducer array is formed with a substrate that has a multiple distinct cells formed therein. Within each of the distinct cells is positioned an acoustic transducing element formed of an electret material. A conductive membrane is formed over the distinct cells and may be flexible.

Moore, Thomas L. (Livermore, CA); Fisher, Karl A. (Brentwood, CA)

2005-08-09T23:59:59.000Z

30

Feasibility of an acoustic technique for fracture detection  

DOE Green Energy (OSTI)

A field experiment was conducted at a granite quarry to determine the feasibility of an acoustic, downhole technique for location of fractures in the vicinity of boreholes. The frequency used in this test was about 5 kHz; a frequency well above the seismic frequency commonly used in reservoir evaluations. An existing flame-cut slot in the granite at the test site was filled with water to simulate a fracture. A high-energy piezoelectric transmitter was located in a borehole 8 meters from the water-filled slot, and a commercial piezoelectric transducer was used as a receiver in a borehole 4 meters from the slot. Both transducers could be rotated for maximum transmission or reception for either the compressional wave or the shear wave. During the experiment, reflections from the simulated fracture were obtained with the transducers oriented only for shear wave illumination and detection. These test results suggest that a high-frequency shear wave can be used to detect fractures located away from a borehole. 2 refs., 2 figs.

Chang, H.T.

1985-01-01T23:59:59.000Z

31

Portable modular detection system  

Science Conference Proceedings (OSTI)

Disclosed herein are portable and modular detection devices and systems for detecting electromagnetic radiation, such as fluorescence, from an analyte which comprises at least one optical element removably attached to at least one alignment rail. Also disclosed are modular detection devices and systems having an integrated lock-in amplifier and spatial filter and assay methods using the portable and modular detection devices.

Brennan, James S. (Rodeo, CA); Singh, Anup (Danville, CA); Throckmorton, Daniel J. (Tracy, CA); Stamps, James F. (Livermore, CA)

2009-10-13T23:59:59.000Z

32

Proposed Detection of Dynamically Oriented Nuclei by Acoustic Nuclear Magnetic Resonance  

Science Conference Proceedings (OSTI)

It is proposed that acoustic nuclear magnetic resonance be used to detect steady?state nuclear orientation achieved by the Jeffries Abragam effect. This is a new scheme for double magnetic resonance (ADMR) in contrast with conventional DMR

Mary Duns Scotus Breitbart; W. A. Barker

1967-01-01T23:59:59.000Z

33

Method and apparatus for acoustic plate mode liquid-solid phase transition detection  

DOE Patents (OSTI)

A method and apparatus for sensing a liquid-solid phase transition event is provided which comprises an acoustic plate mode detecting element placed in contact with a liquid or solid material which generates a high-frequency acoustic wave that is attenuated to an extent based on the physical state of the material in contact with the detecting element. The attenuation caused by the material in contact with the acoustic plate mode detecting element is used to determine the physical state of the material being detected. The method and device are particularly suited for detecting conditions such as the icing and deicing of wings of an aircraft. In another aspect of the present invention, a method is provided wherein the adhesion of a solid material to the detecting element can be measured using the apparatus of the invention. 3 figs.

Blair, D.S.; Frye, G.C.; Hughes, R.C.; Martin, S.J.; Ricco, A.J.

1990-12-31T23:59:59.000Z

34

Method and apparatus for acoustic plate mode liquid-solid phase transition detection  

DOE Patents (OSTI)

A method and apparatus for sensing a liquid-solid phase transition event is provided which comprises an acoustic plate mode detecting element placed in contact with a liquid or solid material which generates a high-frequency acoustic wave that is attenuated to an extent based on the physical state of the material in contact with the detecting element. The attenuation caused by the material in contact with the acoustic plate mode detecting element is used to determine the physical state of the material being detected. The method and device are particularly suited for detecting conditions such as the icing and deicing of wings of an aircraft. In another aspect of the present invention, a method is provided wherein the adhesion of a solid material to the detecting element can be measured using the apparatus of the invention. 3 figs.

Blair, D.S.; Frye, G.C.; Hughes, R.C.; Martin, S.J.; Ricco, A.J.

1990-01-01T23:59:59.000Z

35

Design and Instrumentation of a Measurement and Calibration System for an Acoustic Telemetry System  

Science Conference Proceedings (OSTI)

The Juvenile Salmon Acoustic Telemetry System (JSATS) is an active sensing technology developed by Portland District, the U.S. Army Corps of Engineers for detecting and tracking small fish. It is used at hydroelectric projects and in the laboratory for evaluating behavior and survival of juvenile salmonids migrating through the Federal Columbia River Power System to the Pacific Ocean. It provides critical data for salmon protection and development of more “fish-friendly” hydroelectric facilities. The objective of this study was to design and build a measurement and calibration system for evaluating the JSATS component, because the JSATS requires comprehensive acceptance and performance testing in a controlled environment before it is deployed in the field. The system consists of a reference transducer, a water test tank lined with anechoic material, a motion control unit, a reference receiver, a signal conditioner and amplifier unit, a data acquisition board, MATLAB control and analysis interface, and a computer. The fully integrated system has been evaluated successfully at various simulated distances and using different encoded signals at frequencies within the bandwidth of the JSATS transmitter. It provides accurate acoustic mapping capability in a controlled environment and automates the process that allows real-time measurements and evaluation of the piezoelectric transducers, sensors, or the acoustic fields. The measurement and calibration system has been in use since 2009 for acceptance and performance testing of, and further improvements to, the JSATS.

Deng, Zhiqun; Weiland, Mark A.; Carlson, Thomas J.; Eppard, M. B.

2010-03-31T23:59:59.000Z

36

Detection of explosive events by monitoring acoustically-induced geomagnetic perturbations  

Science Conference Proceedings (OSTI)

The Black Thunder Coal Mine (BTCM) near Gillette, Wyoming was used as a test bed to determine the feasibility of detecting explosion-induced geomagnetic disturbances with ground-based induction magnetometers. Two magnetic observatories were fielded at distances of 50 km and 64 km geomagnetically north from the northernmost edge of BTCM. Each observatory consisted of three separate but mutually orthogonal magnetometers, Global Positioning System (GPS) timing, battery and solar power, a data acquisition and storage system, and a three-axis seismometer. Explosions with yields of 1 to 3 kT of TNT equivalent occur approximately every three weeks at BTCM. We hypothesize that explosion-induced acoustic waves propagate upward and interact collisionally with the ionosphere to produce ionospheric electron density (and concomitant current density) perturbations which act as sources for geomagnetic disturbances. These disturbances propagate through an ionospheric Alfven waveguide that we postulate to be leaky (due to the imperfectly conducting lower ionospheric boundary). Consequently, wave energy may be observed on the ground. We observed transient pulses, known as Q-bursts, with pulse widths about 0.5 s and with spectral energy dominated by the Schumann resonances. These resonances appear to be excited in the earth-ionosphere cavity by Alfven solitons that may have been generated by the explosion-induced acoustic waves reaching the ionospheric E and F regions and that subsequently propagate down through the ionosphere to the atmosphere. In addition, we observe late time (> 800 s) ultra low frequency (ULF) geomagnetic perturbations that appear to originate in the upper F region ({approximately}300 km) and appear to be caused by the explosion-induced acoustic wave interacting with that part of the ionosphere. We suggest that explosion-induced Q-bursts may be discriminated from naturally occurring Q-bursts by association of the former with the late time explosion-induced ULF perturbations. We also present evidence for an acoustically-induced magnetic signal at both magnetic observatories, indicating that magnetometers act as highly sensitive detectors of acoustically-induced ground motion. Further experimental and theoretical work are required to improve confidence in these conclusions.

Lewis, J P; Rock, D R; Shaeffer, D L; Warshaw, S I

1999-10-07T23:59:59.000Z

37

Neutrino Detection, Position Calibration and Marine Science with Acoustic Arrays in the Deep Sea  

E-Print Network (OSTI)

Arrays of acoustic receivers are an integral part of present and potential future Cherenkov neutrino telescopes in the deep sea. They measure the positions of individual detector elements which vary with time as an effect of undersea currents. At the same time, the acoustic receivers can be employed for marine science purposes, in particular for monitoring the ambient noise environment and the signals emitted by the fauna of the sea. And last but not least, they can be used for studies towards acoustic detection of ultra-high-energy neutrinos. Measuring acoustic pressure pulses in huge underwater acoustic arrays with an instrumented volume of the order of 100 km^3 is a promising approach for the detection of cosmic neutrinos with energies exceeding 1 EeV. Pressure signals are produced by the particle cascades that evolve when neutrinos interact with nuclei in water, and can be detected over large distances in the kilometre range. In this article, the status of acoustic detection will be reviewed and plans for...

Lahmann, Robert

2013-01-01T23:59:59.000Z

38

Detection of contamination of municipal water distribution systems  

DOE Patents (OSTI)

A system for the detection of contaminates of a fluid in a conduit. The conduit is part of a fluid distribution system. A chemical or biological sensor array is connected to the conduit. The sensor array produces an acoustic signal burst in the fluid upon detection of contaminates in the fluid. A supervisory control system connected to the fluid and operatively connected to the fluid distribution system signals the fluid distribution system upon detection of contaminates in the fluid.

Cooper, John F. (Oakland, CA)

2012-01-17T23:59:59.000Z

39

Compensated intruder-detection systems  

DOE Patents (OSTI)

Intruder-detection systems in which intruder-induced signals are transmitted through a medium also receive spurious signals induced by changes in a climatic condition affecting the medium. To combat this, signals received from the detection medium are converted to a first signal. The system also provides a reference signal proportional to climate-induced changes in the medium. The first signal and the reference signal are combined for generating therefrom an output signal which is insensitive to the climatic changes in the medium. An alarm is energized if the output signal exceeds a preselected value. In one embodiment, an acoustic cable is coupled to a fence to generate a first electrical signal proportional to movements thereof. False alarms resulting from wind-induced movements of the fence (detection medium) are eliminated by providing an anemometer-driven voltage generator to provide a reference voltage proportional to the velocity of wind incident on the fence. An analog divider receives the first electrical signal and the reference signal as its numerator and denominator inputs, respectively, and generates therefrom an output signal which is insensitive to the wind-induced movements in the fence.

McNeilly, David R. (Maryville, TN); Miller, William R. (Andersonville, TN)

1984-01-01T23:59:59.000Z

40

Resonant acoustic transducer and driver system for a well drilling string communication system  

DOE Patents (OSTI)

The acoustic data communication system includes an acoustic transmitter and receiver wherein low frequency acoustic waves, propagating in relatively loss free manner in well drilling string piping, are efficiently coupled to the drill string and propagate at levels competitive with the levels of noise generated by drilling machinery also present in the drill string. The transmitting transducer incorporates a mass-spring piezoelectric transmitter and amplifier combination that permits self-oscillating resonant operation in the desired low frequency range.

Chanson, Gary J. (Weston, MA); Nicolson, Alexander M. (Concord, MA)

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Detection of time-pressure induced stress in speech via acoustic indicators  

Science Conference Proceedings (OSTI)

We use automatically extracted acoustic features to detect speech which is generated under stress, achieving 76.24% accuracy with a binary logistic regression. Our data are task-oriented human-human dialogues in which a time-limit is unexpectedly introduced ...

Matthew Frampton; Sandeep Sripada; Ricardo Augusto Hoffmann Bion; Stanley Peters

2010-09-01T23:59:59.000Z

42

Radiation detection system  

SciTech Connect

A radiation detection system including a radiation-to-light converter and fiber optic wave guides to transmit the light to a remote location for processing. The system utilizes fluors particularly developed for use with optical fibers emitting at wavelengths greater than about 500 nm and having decay times less than about 10 ns.

Franks, Larry A. (Santa Barbara, CA); Lutz, Stephen S. (Santa Barbara, CA); Lyons, Peter B. (Los Alamos, NM)

1981-01-01T23:59:59.000Z

43

Solar system fault detection  

DOE Patents (OSTI)

A fault detecting apparatus and method are provided for use with an active solar system. The apparatus provides an indication as to whether one or more predetermined faults have occurred in the solar system. The apparatus includes a plurality of sensors, each sensor being used in determining whether a predetermined condition is present. The outputs of the sensors are combined in a pre-established manner in accordance with the kind of predetermined faults to be detected. Indicators communicate with the outputs generated by combining the sensor outputs to give the user of the solar system and the apparatus an indication as to whether a predetermined fault has occurred. Upon detection and indication of any predetermined fault, the user can take appropriate corrective action so that the overall reliability and efficiency of the active solar system are increased.

Farrington, R.B.; Pruett, J.C. Jr.

1984-05-14T23:59:59.000Z

44

Solar system fault detection  

SciTech Connect

A fault detecting apparatus and method are provided for use with an active solar system. The apparatus provides an indication as to whether one or more predetermined faults have occurred in the solar system. The apparatus includes a plurality of sensors, each sensor being used in determining whether a predetermined condition is present. The outputs of the sensors are combined in a pre-established manner in accordance with the kind of predetermined faults to be detected. Indicators communicate with the outputs generated by combining the sensor outputs to give the user of the solar system and the apparatus an indication as to whether a predetermined fault has occurred. Upon detection and indication of any predetermined fault, the user can take appropriate corrective action so that the overall reliability and efficiency of the active solar system are increased.

Farrington, Robert B. (Wheatridge, CO); Pruett, Jr., James C. (Lakewood, CO)

1986-01-01T23:59:59.000Z

45

Detecting coughing episodes passively from acoustic signals in a home environment: demo abstract  

Science Conference Proceedings (OSTI)

We demonstrate a passive cough monitoring system for in-home environments using acoustic sensors. Our system does not need the users to wear any device. It also works under the presence of typical sounds that may be common in a home environment. Keywords: activity monitoring, assisted living

Enamul Hoque; John A. Stankovic

2010-10-01T23:59:59.000Z

46

DETECTION OR WARNING SYSTEM  

DOE Patents (OSTI)

This patent application describes a sensitive detection or protective system capable of giving an alarm or warning upon the entrance or intrusion of any body into a defined area or zone protected by a radiation field of suitable direction or extent.

Tillman, J.E.

1951-06-30T23:59:59.000Z

47

Acoustic system for communication in pipelines  

DOE Patents (OSTI)

A system for communication in a pipe, or pipeline, or network of pipes containing a fluid. The system includes an encoding and transmitting sub-system connected to the pipe, or pipeline, or network of pipes that transmits a signal in the frequency range of 3-100 kHz into the pipe, or pipeline, or network of pipes containing a fluid, and a receiver and processor sub-system connected to the pipe, or pipeline, or network of pipes containing a fluid that receives said signal and uses said signal for a desired application.

Martin, II, Louis Peter (San Ramon, CA); Cooper, John F. (Oakland, CA)

2008-09-09T23:59:59.000Z

48

Computer program for conducting acoustical analyses of HVAC systems.  

Science Conference Proceedings (OSTI)

An interactive Windows?based computer program has been developed that can be used to conduct complete acoustical analyses of HVAC systems. The program can be used to track sound from a HVACsound source such as a fan to a room. Both sound from a single path between a sound source and room or from multiple paths between a sound source and room can be investigated. The program has a full set of editing features that include change

Douglas D. Reynolds; Scott C. Mitchell

1996-01-01T23:59:59.000Z

49

An expert advising system with acoustic output  

Science Conference Proceedings (OSTI)

In this paper we describe the application of natural language processing and speech techniques to improve the user-interface of expert systems. The particular goal of our project was to develop a German language interface for expert systems using speech ...

Harald Trost; E. Buchberger; G. Dorffner

1989-07-01T23:59:59.000Z

50

Radiation detection system  

DOE Patents (OSTI)

A radiation detection system which utilizes the generation of Cerenkov light in and the transmission of that light longitudinally through fiber optic wave guides in order to transmit intelligence relating to the radiation to a remote location. The wave guides are aligned with respect to charged particle radiation so that the Cerenkov light, which is generated at an angle to the radiation, is accepted by the fiber for transmission therethrough. The Cerenkov radiation is detected, recorded, and analyzed at the other end of the fiber.

Nelson, Melvin A. (Santa Barbara, CA); Davies, Terence J. (Santa Barbara, CA); Morton, III, John R. (Livermore, CA)

1976-01-01T23:59:59.000Z

51

Acoustic methods for detecting water-filled fractures using commercial logging tools  

DOE Green Energy (OSTI)

The Los Alamos Scientific Laboratory Hot Dry Rock Geothermal Energy Development Project, under the Department of Energy and in cooperation with Dresser Atlas, has conducted single- and dual-well acoustic measurements to detect fractures in the artificial geothermal reservoir at the Fenton Hill New Mexico experimental site. The measurements were made using modified Dresser Atlas logging tools. Signals traversed distances of from 48 to 150 feet between two wells. Signals intersecting hydraulic fractures in the reservoir under both hydrostatic and pressurized conditions were simultaneously detected in both wells. Upon reservoir pressurization, signals along many ray paths were severely attenuated throughout their entire coda. In addition obvious shear wave arrivals were notably absent. The signals were processed to obtain Full-Wave Acoustic, Power, and Normalized Equi-Power Logs. Analysis of these logs identified the effective ''top'' of a region of hydraulically activated fractures and fractures intersecting the injection well behind casing.

Albright, J.N.; Aamodt, R.L.; Potter, R.M.; Spence, R.W.

1978-01-01T23:59:59.000Z

52

Arc fault detection system  

DOE Patents (OSTI)

An arc fault detection system for use on ungrounded or high-resistance-grounded power distribution systems is provided which can be retrofitted outside electrical switchboard circuits having limited space constraints. The system includes a differential current relay that senses a current differential between current flowing from secondary windings located in a current transformer coupled to a power supply side of a switchboard, and a total current induced in secondary windings coupled to a load side of the switchboard. When such a current differential is experienced, a current travels through a operating coil of the differential current relay, which in turn opens an upstream circuit breaker located between the switchboard and a power supply to remove the supply of power to the switchboard.

Jha, Kamal N. (Bethel Park, PA)

1999-01-01T23:59:59.000Z

53

Arc fault detection system  

DOE Patents (OSTI)

An arc fault detection system for use on ungrounded or high-resistance-grounded power distribution systems is provided which can be retrofitted outside electrical switchboard circuits having limited space constraints. The system includes a differential current relay that senses a current differential between current flowing from secondary windings located in a current transformer coupled to a power supply side of a switchboard, and a total current induced in secondary windings coupled to a load side of the switchboard. When such a current differential is experienced, a current travels through a operating coil of the differential current relay, which in turn opens an upstream circuit breaker located between the switchboard and a power supply to remove the supply of power to the switchboard. 1 fig.

Jha, K.N.

1999-05-18T23:59:59.000Z

54

HRT LEAK DETECTION SYSTEM  

SciTech Connect

All HRT process piping and equipment is contained in a large tank and flanged connections with stainless steel ring gaskets are used where needed to permit the removal of values and items of equipment. Underwater remote maintenance is to be employed and special provisions are required for indicating and locating leaks at all mechanical joints in the process system. Each joint is monitored and a signal is given when a leak occurs. The valve operator stems are sealed with stainless steel bellows and a means of detecting a leak in the bellows has been included. (auth)

Kuster, J.E.

1956-04-20T23:59:59.000Z

55

Detection of ultra high energy neutrinos with an underwater very large volume array of acoustic sensors: A simulation study  

E-Print Network (OSTI)

This thesis investigates the detection of ultra high energy (E > 1 EeV) cosmic neutrinos using acoustic sensors immersed in water. The method is based on the thermoacoustic model describing the production of microsecond bipolar acoustic pulses by neutrino-induced particle cascades. These cascades locally heat the medium which leads to rapid expansion and a short sonic pulse detectable in water with hydrophones over distances of several kilometres. This makes acoustic detection an approach complementary to todays optical Cerenkov and radio Cerenkov detectors, and could help to reduce the respective systematic uncertainties. In this work a complete simulation / reconstruction chain for a submarine acoustic neutrino telescope is developed, and the sensitivity of such a detector to a diffuse flux of ultra highenergy cosmic neutrinos is estimated.

Timo Karg

2006-08-15T23:59:59.000Z

56

Damage inspection of fiber reinforced polymer-concrete systems using a distant acoustic-laser NDE technique  

E-Print Network (OSTI)

In this paper, a distant acoustic-laser NDE technique is proposed, utilizing a high powered standoff parametric acoustic array (PAA) and laser Doppler vibrometry (LDV), for the detection of debonding and delamination in ...

Haupt, Robert W.

57

Acoustic dispersion in a two-dimensional dipole system  

Science Conference Proceedings (OSTI)

We calculate the full density response function and from it the long-wavelength acoustic dispersion for a two-dimensional system of strongly coupled point dipoles interacting through a 1/r{sup 3} potential at arbitrary degeneracy. Such a system has no random-phase-approximation (RPA) limit and the calculation has to include correlations from the outset. We follow the quasilocalized charge (QLC) approach, accompanied by molecular-dynamics (MD) simulations. Similarly to what has been recently reported for the closely spaced classical electron-hole bilayer [G. J. Kalman et al., Phys. Rev. Lett. 98, 236801 (2007)] and in marked contrast to the RPA, we report a long-wavelength acoustic phase velocity that is wholly maintained by particle correlations and varies linearly with the dipole moment p. The oscillation frequency, calculated both in an extended QLC approximation and in the Singwi-Tosi-Land-Sjolander approximation [Phys. Rev. 176, 589 (1968)], is invariant in form over the entire classical to quantum domains all the way down to zero temperature. Based on our classical MD-generated pair distribution function data and on ground-state energy data generated by recent quantum Monte Carlo simulations on a bosonic dipole system [G. E. Astrakharchik et al., Phys. Rev. Lett. 98, 060405 (2007)], there is a good agreement between the QLC approximation kinetic sound speeds and the standard thermodynamic sound speeds in both the classical and quantum domains.

Golden, Kenneth I.; Kalman, Gabor J.; Donko, Zoltan; Hartmann, Peter [Department of Mathematics and Statistics, College of Engineering and Mathematical Sciences, University of Vermont, Burlington, Vermont 05401-1455 (United States); Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467 (United States); Research Institute for Solid State Physics and Optics of the Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest (Hungary)

2008-07-15T23:59:59.000Z

58

Methods And Systems For Using Reference Images In Acoustic Image Processing  

DOE Patents (OSTI)

A method and system of examining tissue are provided in which a field, including at least a portion of the tissue and one or more registration fiducials, is insonified. Scattered acoustic information, including both transmitted and reflected waves, is received from the field. A representation of the field, including both the tissue and the registration fiducials, is then derived from the received acoustic radiation.

Moore, Thomas L. (Livermore, CA); Barter, Robert Henry (Oakland, CA)

2005-01-04T23:59:59.000Z

59

Resonant acoustic transducer system for a well drilling string  

DOE Patents (OSTI)

For use in transmitting acoustic waves propated along a well drilling string, a piezoelectric transducer is provided operating in the relatively low loss acoustic propagation range of the well drilling string. The efficiently coupled transmitting transducer incorporates a mass-spring-piezoelectric transmitter combination permitting a resonant operation in the desired low frequency range.

Nardi, Anthony P. (Burlington, MA)

1981-01-01T23:59:59.000Z

60

Resonant acoustic transducer system for a well drilling string  

DOE Patents (OSTI)

For use in transmitting acoustic waves propagated along a well drilling string, a piezoelectric transducer is provided operating in the relatively low loss acoustic propagation range of the well drilling string. The efficiently coupled transmitting transducer incorporates a mass-spring-piezoelectric transmitter combination permitting resonant operation in the desired low frequency range.

Kent, William H. (Westford, MA); Mitchell, Peter G. (Concord, MA)

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Optimization of Concurrent Deployments of the Juvenile Salmon Acoustic Telemetry System and Other Hydroacoustic Equipment at John Day Dam  

DOE Green Energy (OSTI)

The purpose of this report is to document the results of the acoustic optimization study conducted at John Day Dam during January and February 2008. The goal of the study was to optimize performance of the Juvenile Salmon Acoustic Telemetry System (JSATS) by determining deployment and data acquisition methods to minimize electrical and acoustic interference from various other acoustic sampling devices. Thereby, this would allow concurrent sampling by active and passive acoustic methods during the formal evaluations of the prototype surface flow outlets at the dam during spring and summer outmigration seasons for juvenile salmonids. The objectives for the optimization study at John Day Dam were to: 1. Design and test prototypes and provide a total needs list of pipes and trolleys to deploy JSATS hydrophones on the forebay face of the powerhouse and spillway. 2. Assess the effect on mean percentage decoded of JSATS transmissions from tags arrayed in the forebay and detected on the hydrophones by comparing: turbine unit OFF vs. ON; spill bay OPEN vs. CLOSED; dual frequency identification sonar (DIDSON) and acoustic Doppler current profiler (ADCP) both OFF vs. ON at a spill bay; and, fixed-aspect hydroacoustic system OFF vs. ON at a turbine unit and a spill bay. 3. Determine the relationship between fixed-aspect hydroacoustic transmit level and mean percentage of JSATS transmissions decoded. The general approach was to use hydrophones to listen for transmissions from JSATS tags deployed in vertical arrays in a series perpendicular to the face of the dam. We used acoustic telemetry equipment manufactured by Technologic and Sonic Concepts. In addition, we assessed old and new JSATS signal detectors and decoders and two different types of hydrophone baffling. The optimization study consisted of a suite of off/on tests. The primary response variable was mean percentage of tag transmissions decoded. We found that there was no appreciable adverse effect on mean percentage decoded for JSATS transmitters from: turbine operations; spillway operations; DIDSON/ADCP acoustic energy; and PAS hydroacoustic systems at transmit level of -12 dB, although there was a significant impact at all higher transmit levels (-11 to -6 dB). The main conclusion from this optimization study is that valid JSATS telemetry data can be collected simultaneously with a DIDSON/ADCP and a PAS hydroacoustic system at transmit level -12 dB. Multiple evaluation tools should be considered to increase the robustness and thoroughness of future fish passage evaluations at John Day and other dams.

Ploskey, Gene R.; Hughes, James S.; Khan, Fenton; Kim, Jina; Lamarche, Brian L.; Johnson, Gary E.; Choi, Eric Y.; Faber, Derrek M.; Wilberding, Matthew C.; Deng, Zhiqun; Weiland, Mark A.; Zimmerman, Shon A.; Fischer, Eric S.; Cushing, Aaron W.

2008-09-01T23:59:59.000Z

62

Direct-field acoustic testing of a flight system : logistics, challenges, and results.  

DOE Green Energy (OSTI)

Before a spacecraft can be considered for launch, it must first survive environmental testing that simulates the launch environment. Typically, these simulations include vibration testing performed using an electro-dynamic shaker. For some spacecraft however, acoustic excitation may provide a more severe loading environment than base shaker excitation. Because this was the case for a Sandia Flight System, it was necessary to perform an acoustic test prior to launch in order to verify survival due to an acoustic environment. Typically, acoustic tests are performed in acoustic chambers, but because of scheduling, transportation, and cleanliness concerns, this was not possible. Instead, the test was performed as a direct field acoustic test (DFAT). This type of test consists of surrounding a test article with a wall of speakers and controlling the acoustic input using control microphones placed around the test item, with a closed-loop control system. Obtaining the desired acoustic input environment - proto-flight random noise input with an overall sound pressure level (OASPL) of 146.7 dB-with this technique presented a challenge due to several factors. An acoustic profile with this high OASPL had not knowingly been obtained using the DFAT technique prior to this test. In addition, the test was performed in a high-bay, where floor space and existing equipment constrained the speaker circle diameter. And finally, the Flight System had to be tested without contamination of the unit, which required a contamination bag enclosure of the test unit. This paper describes in detail the logistics, challenges, and results encountered while performing a high-OASPL, direct-field acoustic test on a contamination-sensitive Flight System in a high-bay environment.

Stasiunas, Eric Carl; Gurule, David Joseph; Babuska, Vit; Skousen, Troy J.

2010-10-01T23:59:59.000Z

63

The Sound Emission Board of the KM3NeT Acoustic Positioning System  

E-Print Network (OSTI)

We describe the sound emission board proposed for installation in the acoustic positioning system of the future KM3NeT underwater neutrino telescope. The KM3NeT European consortium aims to build a multi-cubic kilometre underwater neutrino telescope in the deep Mediterranean Sea. In this kind of telescope the mechanical structures holding the optical sensors, which detect the Cherenkov radiation produced by muons emanating from neutrino interactions, are not completely rigid and can move up to dozens of meters in undersea currents. Knowledge of the position of the optical sensors to an accuracy of about 10 cm is needed for adequate muon track reconstruction. A positioning system based on the acoustic triangulation of sound transit time differences between fixed seabed emitters and receiving hydrophones attached to the kilometre-scale vertical flexible structures carrying the optical sensors is being developed. In this paper, we describe the sound emission board developed in the framework of KM3NeT project, whi...

Llorens, C D; Sogorb, T; Bou--Cabo, M; Martínez-Mora, J A; Larosa, G; Adrián-Martínez, S

2012-01-01T23:59:59.000Z

64

Protein detection system  

DOE Patents (OSTI)

The present embodiment describes a miniature, microfluidic, absorption-based sensor to detect proteins at sensitivities comparable to LIF but without the need for tagging. This instrument utilizes fiber-based evanescent-field cavity-ringdown spectroscopy, in combination with faceted prism microchannels. The combination of these techniques will increase the effective absorption path length by a factor of 10.sup.3 to 10.sup.4 (to .about.1-m), thereby providing unprecedented sensitivity using direct absorption. The coupling of high-sensitivity absorption with high-performance microfluidic separation will enable real-time sensing of biological agents in aqueous samples (including aerosol collector fluids) and will provide a general method with spectral fingerprint capability for detecting specific bio-agents.

Fruetel, Julie A. (Livermore, CA); Fiechtner, Gregory J. (Bethesda, MD); Kliner, Dahv A. V. (San Ramon, CA); McIlroy, Andrew (Livermore, CA)

2009-05-05T23:59:59.000Z

65

Acoustic Detection of Greenhouse-induced Climate Changes in the Presence of Slow Fluctuations of the Thermohaline Circulation  

Science Conference Proceedings (OSTI)

Munk and Forbes have proposed to detect greenhouse gas-induced climate changes in the World Ocean with an array of long-range acoustic transmissions from Heard Island in the southern Indian Ocean. We estimated–assuming a continuously monitorable ...

Uwe Mikolajewicz; Ernst Maier-Reimer; Tim P. Barnett

1993-06-01T23:59:59.000Z

66

Acoustic Characterization of Mesoscale Objects  

SciTech Connect

This report describes the science and engineering performed to provide state-of-the-art acoustic capabilities for nondestructively characterizing mesoscale (millimeter-sized) objects--allowing micrometer resolution over the objects entire volume. Materials and structures used in mesoscale objects necessitate the use of (1) GHz acoustic frequencies and (2) non-contacting laser generation and detection of acoustic waves. This effort demonstrated that acoustic methods at gigahertz frequencies have the necessary penetration depth and spatial resolution to effectively detect density discontinuities, gaps, and delaminations. A prototype laser-based ultrasonic system was designed and built. The system uses a micro-chip laser for excitation of broadband ultrasonic waves with frequency components reaching 1.0 GHz, and a path-stabilized Michelson interferometer for detection. The proof-of-concept for mesoscale characterization is demonstrated by imaging a micro-fabricated etched pattern in a 70 {micro}m thick silicon wafer.

Chinn, D; Huber, R; Chambers, D; Cole, G; Balogun, O; Spicer, J; Murray, T

2007-03-13T23:59:59.000Z

67

Thermal neutron detection system  

DOE Patents (OSTI)

According to the present invention, a system for measuring a thermal neutron emission from a neutron source, has a reflector/moderator proximate the neutron source that reflects and moderates neutrons from the neutron source. The reflector/moderator further directs thermal neutrons toward an unmoderated thermal neutron detector.

Peurrung, Anthony J. (Richland, WA); Stromswold, David C. (West Richland, WA)

2000-01-01T23:59:59.000Z

68

APDS: Autonomous Pathogen Detection System  

SciTech Connect

An early warning system to counter bioterrorism, the Autonomous Pathogen Detection System (APDS) continuously monitors the environment for the presence of biological pathogens (e.g., anthrax) and once detected, it sounds an alarm much like a smoke detector warns of a fire. Long before September 11, 2001, this system was being developed to protect domestic venues and events including performing arts centers, mass transit systems, major sporting and entertainment events, and other high profile situations in which the public is at risk of becoming a target of bioterrorist attacks. Customizing off-the-shelf components and developing new components, a multidisciplinary team developed APDS, a stand-alone system for rapid, continuous monitoring of multiple airborne biological threat agents in the environment. The completely automated APDS samples the air, prepares fluid samples in-line, and performs two orthogonal tests: immunoassay and nucleic acid detection. When compared to competing technologies, APDS is unprecedented in terms of flexibility and system performance.

Langlois, R G; Brown, S; Burris, L; Colston, B; Jones, L; Makarewicz, T; Mariella, R; Masquelier, D; McBride, M; Milanovich, F; Masarabadi, S; Venkateswaran, K; Marshall, G; Olson, D; Wolcott, D

2002-02-14T23:59:59.000Z

69

Power line detection system  

DOE Patents (OSTI)

A short-range, radio frequency (RF) transmitting-receiving system that provides both visual and audio warnings to the pilot of a helicopter or light aircraft of an up-coming power transmission line complex. Small, milliwatt-level narrowband transmitters, powered by the transmission line itself, are installed on top of selected transmission line support towers or within existing warning balls, and provide a continuous RF signal to approaching aircraft. The on-board receiver can be either a separate unit or a portion of the existing avionics, and can also share an existing antenna with another airborne system. Upon receipt of a warning signal, the receiver will trigger a visual and an audio alarm to alert the pilot to the potential power line hazard. 4 figs.

Latorre, V.R.; Watwood, D.B.

1994-09-27T23:59:59.000Z

70

Power line detection system  

DOE Patents (OSTI)

A short-range, radio frequency (RF) transmitting-receiving system that provides both visual and audio warnings to the pilot of a helicopter or light aircraft of an up-coming power transmission line complex. Small, milliwatt-level narrowband transmitters, powered by the transmission line itself, are installed on top of selected transmission line support towers or within existing warning balls, and provide a continuous RF signal to approaching aircraft. The on-board receiver can be either a separate unit or a portion of the existing avionics, and can also share an existing antenna with another airborne system. Upon receipt of a warning signal, the receiver will trigger a visual and an audio alarm to alert the pilot to the potential power line hazard.

Latorre, Victor R. (Tracy, CA); Watwood, Donald B. (Tracy, CA)

1994-01-01T23:59:59.000Z

71

Acoustic logging through casing to detect hydrocarbons and determine porosity in the Wilmington Field, CA  

SciTech Connect

The Wilmington Field, located in the Los Angeles Basin, CA, is composed of relatively unconsolidated turbiditic sands waterflooded for more than 40 years. As is common in this and other oil fields in California and elsewhere, considerable bypassed oil remains in place. The water-oil ratio from one well selectively completed in high-oil saturation sands is significantly lower than the water-oil ratio in adjacent wells. We have begun a 2-year test program to identify sands with high remaining oil saturations by logging old cased wells using a high power low frequency acoustic logging tool as part of a project co-funded by the Department of Energy (DOE PON PS22-94BC14972). Formation compressional-wave velocity is obtained from monopole data. Formation shear-wave velocity is obtained by analyzing dipole wave modes. In some wells, however, problems associated with poor cement-casing and cement-formation bond, casing eccentricity in the well, and tool eccentricity in the casing make it difficult to detect the dipole mode. Where good data has been obtained, compressional-wave velocities determined in the same cased hole from logs recorded by two different companies agree quite well, as do open- and cased-hole compressional and shear-wave velocities. Porosities determined through casing using shear-wave velocities match conventional open-hole log values. Saturations determined from the velocities and their ratio are similar to those calculated using Archie's Law. Relationships between porosities, saturations, and velocities are consistent with theoretical expectations. The results indicate that it is possible to determine porosity and saturation through casing using acoustic methods even in relatively unconsolidated sands such as those found in the Wilmington Field, provided sufficiently good monopole and dipole waveforms can be obtained.

Moos, D. (Stanford Univ., CA (United States)); Hooks, A. (MPI, Houston, TX (United States)); Walker, S. (Tidelands Oil Production Co., Long Beach, CA (United States))

1996-01-01T23:59:59.000Z

72

Fissile and Non-Fissile Material Detection Using Nuclear Acoustic Resonance Signatures  

Science Conference Proceedings (OSTI)

The objective of this project is to develop anovel technique for remote, non-destructive, non-radiation-based detection of materials of interest to Nonproliferation Programs. We propse the development of a detection system based on magnetic resonance principles (NAR), which would work where radiation detection is not possible. The approach would be non-intrusive, penetrating, applicable to many materials of interest for Nonproliferation, and be able to identify the nuclear samples under investigation.

Bernhard R. Tittmann; P.M. Lenahan; David Spears; Rhys Williams

2008-11-25T23:59:59.000Z

73

Detection & Diagnostic Systems Multimedia - Argonne National...  

NLE Websites -- All DOE Office Websites (Extended Search)

Multimedia Multimedia Nuclear Systems Analysis Engineering Analysis Nonproliferation and National Security Detection & Diagnostic Systems Engineering Development & Applications...

74

Acoustic modeling problem for automatic speech recognition system: conventional methods (Part I)  

Science Conference Proceedings (OSTI)

In automatic speech recognition (ASR) systems, the speech signal is captured and parameterized at front end and evaluated at back end using the statistical framework of hidden Markov model (HMM). The performance of these systems depend critically on ... Keywords: ASR, Acoustic models, Back end, Front end, Gaussian mixtures, HMM

Rajesh Kumar Aggarwal; Mayank Dave

2011-12-01T23:59:59.000Z

75

Compensated intruder-detection systems  

DOE Patents (OSTI)

The invention is an improvement to an intruder-detection system of the kind where intruder-induced signals are transmitted through a medium whose conductance varies with certain climatic conditions. The improved system includes means coupled to the medium for converting the intruder-induced signals received therefrom to a first electrical signal. Means also are provided for generating a reference signal proportional to the climate-induced changes in the signal-conductance of the medium. Means are provided for generating, from the first electrical signal and the reference signal, an electrical output signal which is unaffected by the changes in signal-conductance. Means are provided to give warning when the output signal exceeds a selected value. In another aspect, the invention is a method for operating an intruder-detection system of the kind wherein an intrusion-generated signal transmitted through a detection medium is converted to a first electrical signal. The first electrical signal contains variations resulting from climate-induced changes in the medium. The method of the invention comprises generating an electrical reference signal proportional to the climate-induced changes in the medium; conditioning the first signal with the reference signal to produce an electrical output signal which is unaffected by the climate-induced changes in the medium; and impressing the resulting output signal across an alarm circuit to actuate the same when the output signal exceeds a selected value.

McNeilly, D.R.; Miller, W.R.

1982-01-20T23:59:59.000Z

76

Ionization detection system for aerosols  

DOE Patents (OSTI)

This invention relates to an improved smoke-detection system of the ionization-chamber type. In the preferred embodiment, the system utilizes a conventional detector head comprising a measuring ionization chamber, a reference ionization chamber, and a normally non-conductive gas triode for discharging when a threshold concentration of airborne particulates is present in the measuring chamber. The improved system utilizes a measuring ionization chamber which is modified to minimize false alarms and reductions in sensitivity resulting from changes in ambient temperature. In the preferred form of the modification, an annular radiation shield is mounted about the usual radiation source provided to effect ionization in the measuring chamber. The shield is supported by a bimetallic strip which flexes in response to changes in ambient temperature, moving the shield relative to the source so as to vary the radiative area of the source in a manner offsetting temperature-induced variations in the sensitivity of the chamber.

Jacobs, Martin E. (Chillicothe, OH)

1977-01-01T23:59:59.000Z

77

An arc fault detection system  

DOE Patents (OSTI)

An arc fault detection system for use on ungrounded or high-resistance-grounded power distribution systems is provided which can be retrofitted outside electrical switchboard circuits having limited space constraints. The system includes a differential current relay that senses a current differential between current flowing from secondary windings located in a current transformer coupled to a power supply side of a switchboard, and a total current induced in secondary windings coupled to a load side of the switchboard. When such a current differential is experienced, a current travels through a operating coil of the differential current relay, which in turn, opens an upstream circuit breaker located between the switchboard and a power supply to remove the supply of power to the switchboard.

Jha, Kamal N.

1997-12-01T23:59:59.000Z

78

Passive Acoustic Detection of Wind Turbine In-Flow Conditions for Active Control and Optimization  

DOE Green Energy (OSTI)

Wind is a significant source of energy; however, the human capability to produce electrical energy still has many hurdles to overcome. One of these is the unpredictability of the winds in the atmospheric boundary layer (ABL). The ABL is highly turbulent in both stable and unstable conditions (based on the vertical temperature profile) and the resulting fluctuations can have a dramatic impact on wind turbine operation. Any method by which these fluctuations could be observed, estimated, or predicted could provide a benefit to the wind energy industry as a whole. Based on the fundamental coupling of velocity fluctuations to pressure fluctuations in the nearly incompressible flow in the ABL, This work hypothesizes that a ground-based array of infrasonic pressure transducers could be employed to estimate the vertical wind profile over a height relevant for wind turbines. To analyze this hypothesis, experiments and field deployments were conducted. Wind tunnel experiments were performed for a thick turbulent boundary layer over a neutral or heated surface. Surface pressure and velocity probe measurements were acquired simultaneously. Two field deployments yielded surface pressure data from a 49 element array. The second deployment at the Reese Technology Center in Lubbock, TX, also included data from a smaller aperture, 96-element array and a 200-meter tall meteorological tower. Analysis of the data successfully demonstrated the ability to estimate the vertical velocity profile using coherence data from the pressure array. Also, dynamical systems analysis methods were successful in identifying and tracking a gust type event. In addition to the passive acoustic profiling method, this program also investigated a rapid response Doppler SODAR system, the optimization of wind turbine blades for enhanced power with reduced aeroacoustic noise production, and the implementation of a wireless health monitoring system for the wind turbine blades. Each of these other objectives was met successfully. The use of phase unwrapping applied to SODAR data was found to yield reasonable results for per-pulse measurements. A health monitoring system design analysis was able to demonstrate the ability to use a very small number of sensors to monitor blade health based on the blade's overall structural modes. Most notable was the development of a multi-objective optimization methodology that successfully yielded an aerodynamic blade design that produces greater power output with reduced aerodynamic loading noise. This optimization method could be significant for future design work.

Murray, Nathan E.

2012-03-12T23:59:59.000Z

79

Pulsed helium ionization detection system  

DOE Patents (OSTI)

A helium ionization detection system is provided which produces stable operation of a conventional helium ionization detector while providing improved sensitivity and linearity. Stability is improved by applying pulsed dc supply voltage across the ionization detector, thereby modifying the sampling of the detectors output current. A unique pulse generator is used to supply pulsed dc to the detector which has variable width and interval adjust features that allows up to 500 V to be applied in pulse widths ranging from about 150 nsec to about dc conditions.

Ramsey, R.S.; Todd, R.A.

1985-04-09T23:59:59.000Z

80

KIDS: keyed intrusion detection system  

Science Conference Proceedings (OSTI)

Since most current network attacks happen at the application layer, analysis of packet payload is necessary for their detection. Unfortunately malicious packets may be crafted to mimic normal payload, and so avoid detection if the anomaly detection method ... Keywords: Kerckhoffs' principle, anomaly detection, keyed IDS, network intrusion detection, word model

Sasa Mrdovic; Branislava Drazenovic

2010-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Explosives detection system and method  

DOE Patents (OSTI)

A method of detecting explosives in a vehicle includes providing a first rack on one side of the vehicle, the rack including a neutron generator and a plurality of gamma ray detectors; providing a second rack on another side of the vehicle, the second rack including a neutron generator and a plurality of gamma ray detectors; providing a control system, remote from the first and second racks, coupled to the neutron generators and gamma ray detectors; using the control system, causing the neutron generators to generate neutrons; and performing gamma ray spectroscopy on spectra read by the gamma ray detectors to look for a signature indicative of presence of an explosive. Various apparatus and other methods are also provided.

Reber, Edward L. (Idaho Falls, ID); Jewell, James K. (Idaho Falls, ID); Rohde, Kenneth W. (Idaho Falls, ID); Seabury, Edward H. (Idaho Falls, ID); Blackwood, Larry G. (Idaho Falls, ID); Edwards, Andrew J. (Idaho Falls, ID); Derr, Kurt W. (Idaho Falls, ID)

2007-12-11T23:59:59.000Z

82

System and method for characterizing voiced excitations of speech and acoustic signals, removing acoustic noise from speech, and synthesizing speech  

DOE Patents (OSTI)

Low power EM waves are used to detect motions of vocal tract tissues of the human speech system before, during, and after voiced speech. A voiced excitation function is derived. The excitation function provides speech production information to enhance speech characterization and to enable noise removal from human speech.

Burnett, Greg C. (Livermore, CA); Holzrichter, John F. (Berkeley, CA); Ng, Lawrence C. (Danville, CA)

2002-01-01T23:59:59.000Z

83

System and method for characterizing synthesizing and/or canceling out acoustic signals from inanimate sound sources  

DOE Patents (OSTI)

A system and method for characterizing, synthesizing, and/or canceling out acoustic signals from inanimate sound sources is disclosed. Propagating wave electromagnetic sensors monitor excitation sources in sound producing systems, such as machines, musical instruments, and various other structures. Acoustical output from these sound producing systems is also monitored. From such information, a transfer function characterizing the sound producing system is generated. From the transfer function, acoustical output from the sound producing system may be synthesized or canceled. The methods disclosed enable accurate calculation of matched transfer functions relating specific excitations to specific acoustical outputs. Knowledge of such signals and functions can be used to effect various sound replication, sound source identification, and sound cancellation applications.

Holzrichter, John F. (Berkeley, CA); Burnett, Greg C. (Livermore, CA); Ng, Lawrence C. (Danville, CA)

2003-01-01T23:59:59.000Z

84

System and method for characterizing, synthesizing, and/or canceling out acoustic signals from inanimate sound sources  

DOE Patents (OSTI)

A system and method for characterizing, synthesizing, and/or canceling out acoustic signals from inanimate sound sources is disclosed. Propagating wave electromagnetic sensors monitor excitation sources in sound producing systems, such as machines, musical instruments, and various other structures. Acoustical output from these sound producing systems is also monitored. From such information, a transfer function characterizing the sound producing system is generated. From the transfer function, acoustical output from the sound producing system may be synthesized or canceled. The methods disclosed enable accurate calculation of matched transfer functions relating specific excitations to specific acoustical outputs. Knowledge of such signals and functions can be used to effect various sound replication, sound source identification, and sound cancellation applications.

Holzrichter, John F. (Berkeley, CA); Burnett, Greg C. (Livermore, CA); Ng, Lawrence C. (Danville, CA)

2007-10-16T23:59:59.000Z

85

System and method for characterizing, synthesizing, and/or canceling out acoustic signals from inanimate sound sources  

DOE Patents (OSTI)

A system and method for characterizing, synthesizing, and/or canceling out acoustic signals from inanimate sound sources is disclosed. Propagating wave electromagnetic sensors monitor excitation sources in sound producing systems, such as machines, musical instruments, and various other structures. Acoustical output from these sound producing systems is also monitored. From such information, a transfer function characterizing the sound producing system is generated. From the transfer function, acoustical output from the sound producing system may be synthesized or canceled. The methods disclosed enable accurate calculation of matched transfer functions relating specific excitations to specific acoustical outputs. Knowledge of such signals and functions can be used to effect various sound replication, sound source identification, and sound cancellation applications.

Holzrichter, John F; Burnett, Greg C; Ng, Lawrence C

2013-05-21T23:59:59.000Z

86

Site specific passive acoustic detection and densities of humpback whale calls off the coast of California /  

E-Print Network (OSTI)

power-law processor[19], is the near-optimal approach to detecting transient marinemarine mammal detection algorithms. Modifications to the standard power-power-law detection algorithm for humpback whale vocalizations”, Fifth International Workshop on Detection, Classification, Localization, and Density Estimation of Marine

Helble, Tyler Adam

2013-01-01T23:59:59.000Z

87

Development of a New Acoustic Emissions Technique for the Detection and Location of Gassing Sources in Power Transformers and LTCs: Phase 2 Results  

Science Conference Proceedings (OSTI)

Detection of acoustic emissions (AE) from partial discharge (PD) events in transformers is well known, and instrumentation is available. However, AE have been detected in the absence of PD. It has been shown that these signals are produced as a result of the inception of gas bubbles and, possibly, the turbulent motion of oil as it heats up. Analysis of these signals from a population of gassing transformers could result in a new diagnostic technique for detecting, locating, and characterizing gassing sit...

2005-05-12T23:59:59.000Z

88

An Acoustic Telemetry System Implemented for Real-Time Monitoring of the Gulf Stream with Inverted Echo Sounders  

Science Conference Proceedings (OSTI)

From August 1989 until August 1990, a simple acoustic telemetry system was used for obtaining real-time data from four inverted echo sounders (IESs) deployed in the Synoptic Ocean Prediction Experiment (SYNOP) inlet array in the Gulf Stream east ...

Stephan D. Howden; D. Randolph Watts; Karen L. Tracey; H. Thomas Rossby

1994-04-01T23:59:59.000Z

89

METHOD AND SYSTEM FOR TURBOMACHINERY SURGE DETECTION ...  

A method and system for surge detection within a gas turbine engine, comprises: measuring the compressor discharge pressure (CDP) of the gas turbine ...

90

NIST: Testing of Radiation Detection Systems  

Science Conference Proceedings (OSTI)

Testing of Radiation Detection Systems. ... The GRaDER program will provide users with information about the performance of radiation instruments. ...

2012-12-12T23:59:59.000Z

91

An Intrusion Detection System Using Quantum-Mechanical Systems  

ORNL 2012-G00220/tcc UT-B ID 200701995 10.2012 An Intrusion Detection System Using Quantum-Mechanical Systems Technology Summary Securing property and ...

92

Acoustic monitoring method and system in laser-induced optical breakdown (LIOB)  

DOE Patents (OSTI)

An acoustic monitoring method and system in laser-induced optical breakdown (LIOB) provides information which characterize material which is broken down, microbubbles in the material, and/or the microenvironment of the microbubbles. In one embodiment of the invention, femtosecond laser pulses are focused just inside the surface of a volume of aqueous solution which may include dendrimer nanocomposite (DNC) particles. A tightly focused, high frequency, single-element ultrasonic transducer is positioned such that its focus coincides axially and laterally with this laser focus. When optical breakdown occurs, a microbubble forms and a shock or pressure wave is emitted (i.e., acoustic emission). In addition to this acoustic signal, the microbubble may be actively probed with pulse-echo measurements from the same transducer. After the microbubble forms, received pulse-echo signals have an extra pulse, describing the microbubble location and providing a measure of axial microbubble size. Wavefield plots of successive recordings illustrate the generation, growth, and collapse of microbubbles due to optical breakdown. These same plots can also be used to quantify LIOB thresholds.

O' Donnell, Matthew (Ann Arbor, MI); Ye, Jing Yong (Ann Arbor, MI); Norris, Theodore B. (Dexter, MI); Baker, Jr., James R. (Ann Arbor, MI); Balogh, Lajos P. (Ann Arbor, MI); Milas, Susanne M. (Ann Arbor, MI); Emelianov, Stanislav Y. (Ann Arbor, MI); Hollman, Kyle W. (Fenton, MI)

2008-05-06T23:59:59.000Z

93

Passive pavement-mounted acoustical linguistic drive alert system and method  

DOE Patents (OSTI)

Systems and methods are described for passive pavement-mounted acoustical alert of the occupants of a vehicle. A method of notifying a vehicle occupant includes providing a driving medium upon which a vehicle is to be driven; and texturing a portion of the driving medium such that the textured portion interacts with the vehicle to produce audible signals, the textured portion pattern such that a linguistic message is encoded into the audible signals. The systems and methods provide advantages because information can be conveyed to the occupants of the vehicle based on the location of the vehicle relative to the textured surface.

Kisner, Roger A. (Knoxville, TN); Anderson, Richard L. (Oak Ridge, TN); Carnal, Charles L. (Cookeville, TN); Hylton, James O. (Clinton, TN); Stevens, Samuel S. (Harriman, TN)

2001-01-01T23:59:59.000Z

94

Discriminating ultrasonic proximity detection system  

DOE Patents (OSTI)

This invention uses an ultrasonic transmitter and receiver and a microprocessor to detect the presence of an object. In the reset mode the invention uses a plurality of echoes from each ultrasonic burst to create a reference table of the echo-burst-signature of the empty monitored environment. The invention then processes the reference table so that it only uses the most reliable data. In the detection mode the invention compares the echo-burst-signature of the present environment with the reference table, detecting an object if there is a consistent difference between the echo-burst-signature of the empty monitored environment recorded in the reference table and the echo-burst-signature of the present environment.

Annala, Wayne C. (Durango, CO)

1989-01-01T23:59:59.000Z

95

Discriminating ultrasonic proximity detection system  

DOE Patents (OSTI)

This invention uses an ultrasonic transmitter and receiver and a microprocessor to detect the presence of an object. In the reset mode the invention uses a plurality of echoes from each ultrasonic burst to create a reference table of the echo-burst-signature of the empty monitored environment. The invention then processes the reference table so that it only uses the most reliable data. In the detection mode the invention compares the echo-burst-signature of the present environment with the reference table, detecting an object if there is a consistent difference between the echo-burst-signature of the empty monitored environment recorded in the reference table and the echo-burst-signature of the present environment.

Annala, W.C.

1986-12-04T23:59:59.000Z

96

Wind Turbine Generator System Acoustic Noise Test Report for the Gaia Wind 11-kW Wind Turbine  

DOE Green Energy (OSTI)

This report details the acoustic noise test conducted on the Gaia-Wind 11-kW wind turbine at the National Wind Technology Center. The test turbine is a two- bladed, downwind wind turbine with a rated power of 11 kW. The test turbine was tested in accordance with the International Electrotechnical Commission standard, IEC 61400-11 Ed 2.1 2006-11 Wind Turbine Generator Systems -- Part 11 Acoustic Noise Measurement Techniques.

Huskey, A.

2011-11-01T23:59:59.000Z

97

Acoustic detection of DNA conformation in genetic assays combined with PCR  

E-Print Network (OSTI)

is not trivial; it requires multiple fluorescent labels for amplicon detection and sophisticated software to simplify the problem of simultaneous analysis of multiple targets in genetic assays by detecting directly biological problems regarding gene expression profiling, determination of viral load in clinical samples, DNA

Cai, Long

98

A novel defect classification system of cast-resin transformers by neural network under acoustic emission signal  

Science Conference Proceedings (OSTI)

Degraded insulating property of electric equipments will lead to serious accident and great loss for the utilities and customers. Partial discharge detection is an efficient diagnosis method to prevent the failure of electric equipments arising from ... Keywords: acoustic emission, neural network, partial discharge, transformer

Cheng-Chien Kuo; Teng-Fa Tsao

2007-04-01T23:59:59.000Z

99

Radiation Detection Materials and Systems | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Radiation Detection Materials and Systems SHARE Radiation Detection Materials and Systems ORNL's Nuclear Material Detection and Characterization programs are at the forefront of...

100

Acoustical prediction methods for heating, ventilating, and air?conditioning (HVAC) systems  

Science Conference Proceedings (OSTI)

The goal of this project is to compare and contrast various aspects of acoustical prediction methods for heating

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Acoustic emission beamforming for enhanced damage detection Gregory C. McLaskeya,1  

E-Print Network (OSTI)

with the structure such as cracking or corrosion, but the severity of this problem is not known, and the evolution for detecting damage, such as cracking, as it occurs on or in a structure. In order to gain meaningful the beamforming technique, the azmuthal direction of the location of the damage may be estimated by the stress

Glaser, Steven D.

102

Detection of arcs in automotive electrical systems  

E-Print Network (OSTI)

At the present time, there is no established method for the detection of DC electric arcing. This is a concern for forthcoming advanced automotive electrical systems which consist of higher DC electric power bus voltages, ...

Mishrikey, Matthew David

2005-01-01T23:59:59.000Z

103

Using Acoustic Emission Principles for Leak Detection on Buried Pipe with Flow  

Science Conference Proceedings (OSTI)

The U.S. nuclear power industry is actively managing the threat of corrosion on buried and underground piping and tanks in response to industry initiative NEI 09-14, Guideline for the Management of Underground Piping and Tank Integrity. A key element of these programs is the inspection of pipe to detect degradation.The Electric Power Research Institute (EPRI) has been evaluating and reporting on inspection technologies that may have viability for nuclear buried pipe inspection ...

2013-07-29T23:59:59.000Z

104

Using Acoustic Emission Principles for Leak Detection on Buried Pipe with Flow  

Science Conference Proceedings (OSTI)

The U.S. nuclear power industry must manage the threat of corrosion in buried and underground piping and tanks, a mandate underscored by the Nuclear Energy Institute’s (NEI’s) industry initiative NEI 09-14, Guideline for the Management of Underground Piping and Tank Integrity. Inspection of pipes to detect degradation is a critical part of corrosion management programs, and the Electric Power Research ...

2012-10-25T23:59:59.000Z

105

RADIATION DETECTING AND TELEMETERING SYSTEM  

DOE Patents (OSTI)

A system is presented for measuring ionizing radiation at several remote stations and transmitting the measured information by radio to a central station. At each remote station a signal proportioned to the counting rate is applied across an electrical condenser made of ferroelectric material. The voltage across the condenser will vary as a function of the incident radiation and the capacitance of the condenser will vary accordingly. This change in capacitance is used to change the frequency of a crystalcontrolled oscillator. The output of the oscillator is coupled to an antenna for transmitting a signal proportional to the incident radiation.

Richards, H.K.

1959-12-15T23:59:59.000Z

106

Acoustic Character Of Hydraulic Fractures In Granite  

E-Print Network (OSTI)

Hydraulic fractures in homogeneous granitic rocks were logged with conventional acoustic-transit-time, acoustic-waveform, and acoustic-televiewer logging systems. Fractured intervals ranged in depth from 45 to 570m. and ...

Paillet, Frederick I.

1983-01-01T23:59:59.000Z

107

Fault detection and diagnosis of technical systems  

Science Conference Proceedings (OSTI)

Sensors, actuators and/or physical components in technical systems are often affected by unpermitted or un-expected deviations from normal operation behaviour. The fault diagnosis task consists of determination of the fault type with as many details ... Keywords: fault detection and diagnosis, residuals, symptoms, technical systems

Ioana Fagarasan; S. ST. Iliescu

2008-06-01T23:59:59.000Z

108

Imaging of Acoustic Waves in Sand  

SciTech Connect

There is considerable interest in detecting objects such as landmines shallowly buried in loose earth or sand. Various techniques involving microwave, acoustic, thermal and magnetic sensors have been used to detect such objects. Acoustic and microwave sensors have shown promise, especially if used together. In most cases, the sensor package is scanned over an area to eventually build up an image or map of anomalies. We are proposing an alternate, acoustic method that directly provides an image of acoustic waves in sand or soil, and their interaction with buried objects. The INEEL Laser Ultrasonic Camera utilizes dynamic holography within photorefractive recording materials. This permits one to image and demodulate acoustic waves on surfaces in real time, without scanning. A video image is produced where intensity is directly and linearly proportional to surface motion. Both specular and diffusely reflecting surfaces can be accomodated and surface motion as small as 0.1 nm can be quantitatively detected. This system was used to directly image acoustic surface waves in sand as well as in solid objects. Waves as frequencies of 16 kHz were generated using modified acoustic speakers. These waves were directed through sand toward partially buried objects. The sand container was not on a vibration isolation table, but sat on the lab floor. Interaction of wavefronts with buried objects showed reflection, diffraction and interference effects that could provide clues to location and characteristics of buried objects. Although results are preliminary, success in this effort suggests that this method could be applied to detection of buried landmines or other near-surface items such as pipes and tanks.

Deason, Vance Albert; Telschow, Kenneth Louis; Watson, Scott Marshall

2003-08-01T23:59:59.000Z

109

System For Detection Of Hazardous Events  

DOE Patents (OSTI)

A system for detecting the occurrence of anomalies, includes a plurality of spaced apart nodes, with each node having adjacent nodes, each of the nodes having one or more sensors associated with the node and capable of detecting anomalies, and each of the nodes having a controller connected to the sensors associated with the node. The system also includes communication links between adjacent nodes, whereby the nodes form a network. Each controller is programmed to query its adjacent nodes to assess the status of the adjacent nodes and the communication links.

Kulesz, James J [Oak Ridge, TN; Worley, Brian A [Knoxville, TN

2005-08-16T23:59:59.000Z

110

Position Sensitive Detection System for Charged Particles  

Science Conference Proceedings (OSTI)

The position sensitive detection system presented in this work employs the Anger logic algorithm to determine the position of the light spark produced by the passage of charged particles on a 170 x 170 x 10 mm3 scintillator material (PILOT-U). The detection system consists of a matrix of nine photomultipliers, covering a fraction of the back area of the scintillators. Tests made with a non-collimated alpha particle source together with a Monte Carlo simulation that reproduces the data, suggest an intrinsic position resolution of up to 6 mm is achieved.

Coello, E. A. [Instituto de Fisica, Univ. Nacional Autonoma de Mexico; Favela, F. [Instituto de Fisica, Univ. Nacional Autonoma de Mexico; Curiel, Q. [Instituto de Fisica, Univ. Nacional Autonoma de Mexico; Chavez, E [Instituto de Fisica, Univ. Nacional Autonoma de Mexico; Huerta, A. [Instituto de Fisica, Univ. Nacional Autonoma de Mexico; Varela, A. [Instituto Nacional de Investigaciones Nucleares, Ocoyoacac, Mexico; Shapira, Dan [ORNL

2012-01-01T23:59:59.000Z

111

DCE Bio Detection System Final Report  

SciTech Connect

The DCE (DNA Capture Element) Bio-Detection System (Biohound) was conceived, designed, built and tested by PNNL under a MIPR for the US Air Force under the technical direction of Dr. Johnathan Kiel and his team at Brooks City Base in San Antonio Texas. The project was directed toward building a measurement device to take advantage of a unique aptamer based assay developed by the Air Force for detecting biological agents. The assay uses narrow band quantum dots fluorophores, high efficiency fluorescence quenchers, magnetic micro-beads beads and selected aptamers to perform high specificity, high sensitivity detection of targeted biological materials in minutes. This final report summarizes and documents the final configuration of the system delivered to the Air Force in December 2008

Lind, Michael A.; Batishko, Charles R.; Morgen, Gerald P.; Owsley, Stanley L.; Dunham, Glen C.; Warner, Marvin G.; Willett, Jesse A.

2007-12-01T23:59:59.000Z

112

Digital radiographic systems detect boiler tube cracks  

SciTech Connect

Boiler water wall leaks have been a major cause of steam plant forced outages. But conventional nondestructive evaluation techniques have a poor track record of detecting corrosion fatigue cracking on the inside surface of the cold side of waterwall tubing. EPRI is performing field trials of a prototype direct-digital radiographic system that promises to be a game changer. 8 figs.

Walker, S. [EPRI, Charlotte, NC (United States)

2008-06-15T23:59:59.000Z

113

System and method for detecting gas  

DOE Patents (OSTI)

A system to detect a presence of a specific gas in a mixture of gaseous byproducts comprising moisture vapor is disclosed. The system includes an electrochemical cell, a transport to deliver the mixture of gaseous byproducts from the electrochemical cell, a gas sensor in fluid communication with the transport, the sensor responsive to a presence of the specific gas to generate a signal corresponding to a concentration of the specific gas, and a membrane to prevent transmission of liquid moisture, the membrane disposed between the transport and the gas sensor.

Chow, Oscar Ken (Simsbury, CT); Moulthrop, Lawrence Clinton (Windsor, CT); Dreier, Ken Wayne (Madison, CT); Miller, Jacob Andrew (Dexter, MI)

2010-03-16T23:59:59.000Z

114

Method and system for generating a beam of acoustic energy from a borehole, and applications thereof  

DOE Patents (OSTI)

A compact array of transducers is employed as a downhole instrument for acoustic investigation of the surrounding rock formation. The array is operable to generate simultaneously a first acoustic beam signal at a first frequency and a second acoustic beam signal at a second frequency different than the first frequency. These two signals can be oriented through an azimuthal rotation of the array and an inclination rotation using control of the relative phases of the signals from the transmitter elements or electromechanical linkage. Due to the non-linearity of the formation, the first and the second acoustic beam signal mix into the rock formation where they combine into a collimated third signal that propagates in the formation along the same direction than the first and second signals and has a frequency equal to the difference of the first and the second acoustic signals. The third signal is received either within the same borehole, after reflection, or another borehole, after transmission, and analyzed to determine information about rock formation. Recording of the third signal generated along several azimuthal and inclination directions also provides 3D images of the formation, information about 3D distribution of rock formation and fluid properties and an indication of the dynamic acoustic non-linearity of the formation.

Johnson Paul A. (Santa Fe, NM); Ten Cate, James A. (Los Alamos, NM); Guyer, Robert (Reno, NV); Le Bas, Pierre-Yves (Los Alamos, NM); Vu, Cung (Houston, TX); Nihei, Kurt (Oakland, CA); Schmitt, Denis P. (Katy, TX); Skelt, Christopher (Houston, TX)

2012-02-14T23:59:59.000Z

115

Systems and methods for detecting and processing  

DOE Patents (OSTI)

Embodiments of the present invention provides systems and method for detecting. Sensing modules are provided in communication with one or more detectors. In some embodiments, detectors are provided that are sensitive to chemical, biological, or radiological agents. Embodiments of sensing modules include processing capabilities to analyze, perform computations on, and/or run models to predict or interpret data received from one or more detectors. Embodiments of sensing modules form various network configurations with one another and/or with one or more data aggregation devices. Some embodiments of sensing modules include power management functionalities.

Johnson, Michael M. (Livermore, CA); Yoshimura, Ann S. (Tracy, CA)

2006-03-28T23:59:59.000Z

116

DOE Mobile Detection Assessment Response System (MDARS)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Helps Pioneer "Robot" Patrol Technology: Deployment of the Helps Pioneer "Robot" Patrol Technology: Deployment of the DOE Mobile Detection Assessment Response System (MDARS) The use of patrol robots to cost effectively improve security while reducing health and safety risks at DOE and NNSA nuclear facilities is an HSS advanced technology deployment "first". Over the past 2 years, the HSS Office of Technology has played a key role in working with the Army, the National Nuclear Security Administration (NNSA), the Nevada National Security Site (NNSS) and General Dynamics Robotics Systems to purchase, prototype, test and deploy the first of three MDARS patrol robots at NNSS. In addition to the initial purchase, HSS successfully negotiated a mutually acceptable

117

Method and system for detecting explosives  

DOE Patents (OSTI)

A method of detecting explosives in a vehicle includes providing a first rack on one side of the vehicle, the rack including a neutron generator and a plurality of gamma ray detectors; providing a second rack on another side of the vehicle, the second rack including a neutron generator and a plurality of gamma ray detectors; providing a control system, remote from the first and second racks, coupled to the neutron generators and gamma ray detectors; using the control system, causing the neutron generators to generate neutrons; and performing gamma ray spectroscopy on spectra read by the gamma ray detectors to look for a signature indicative of presence of an explosive. Various apparatus and other methods are also provided.

Reber, Edward L. (Idaho Falls, ID); Jewell, James K. (Idaho Falls, ID); Rohde, Kenneth W. (Idaho Falls, ID); Seabury, Edward H. (Idaho Falls, ID); Blackwood, Larry G. (Idaho Falls, ID); Edwards, Andrew J. (Idaho Falls, ID); Derr, Kurt W. (Idaho Falls, ID)

2009-03-10T23:59:59.000Z

118

Detection & Diagnostic Systems - Nuclear Engineering Division (Argonne)  

NLE Websites -- All DOE Office Websites (Extended Search)

Departments > Detection & Diagnostic Departments > Detection & Diagnostic Systems DEPARTMENTS Engineering Analysis Nuclear Systems Analysis Research & Test Reactor Nonproliferation and National Security Detection & Diagnostic Systems Engineering Development & Applications Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Celebrating the 70th Anniversary of Chicago Pile 1 (CP-1) Argonne OutLoud on Nuclear Energy Argonne Energy Showcase 2012 Detection & Diagnostic Systems Bookmark and Share The Detection & Diagnostic Systems Department conducts research and development related to instruments and non-destructive evaluation (NDE) techniques for characterization of materials and determination of system parameters related to different energy systems (including fossil,

119

For Radiation Detection Systems – Specific Methods  

Science Conference Proceedings (OSTI)

... The test procedures outlined within this TTOP will cover radiation detection instruments used for gamma-ray and neutron detection as well as ...

2013-01-10T23:59:59.000Z

120

Wind Turbine Generator System Acoustic Noise Test Report for the ARE 442 Wind Turbine  

Science Conference Proceedings (OSTI)

This test was conducted on the ARE 442 as part of the U.S. Department of Energy's (DOE's) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Wind Technology Center (NWTC) as a part of this project. Acoustic noise testing is one of up to five tests that may be performed on the turbines, including duration, safety and function, power performance, and power quality tests. The acoustic noise test was conducted to the IEC 61400-11 Edition 2.1.

Huskey, A.; van Dam, J.

2010-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Online fault detection and tolerance for photovoltaic energy harvesting systems  

Science Conference Proceedings (OSTI)

Photovoltaic energy harvesting systems (PV systems) are subject to PV cell faults, which decrease the efficiency of PV systems and even shorten the PV system lifespan. Manual PV cell fault detection and elimination are expensive and nearly impossible ... Keywords: fault detection, fault tolerance, photovoltaic panel reconfiguration, photovoltaic system

Xue Lin; Yanzhi Wang; Di Zhu; Naehyuck Chang; Massoud Pedram

2012-11-01T23:59:59.000Z

122

Acoustic telemetry.  

Science Conference Proceedings (OSTI)

Broadcasting messages through the earth is a daunting task. Indeed, broadcasting a normal telephone conversion through the earth by wireless means is impossible with todays technology. Most of us don't care, but some do. Industries that drill into the earth need wireless communication to broadcast navigation parameters. This allows them to steer their drill bits. They also need information about the natural formation that they are drilling. Measurements of parameters such as pressure, temperature, and gamma radiation levels can tell them if they have found a valuable resource such as a geothermal reservoir or a stratum bearing natural gas. Wireless communication methods are available to the drilling industry. Information is broadcast via either pressure waves in the drilling fluid or electromagnetic waves in the earth and well tubing. Data transmission can only travel one way at rates around a few baud. Given that normal Internet telephone modems operate near 20,000 baud, these data rates are truly very slow. Moreover, communication is often interrupted or permanently blocked by drilling conditions or natural formation properties. Here we describe a tool that communicates with stress waves traveling through the steel drill pipe and production tubing in the well. It's based on an old idea called Acoustic Telemetry. But what we present here is more than an idea. This tool exists, it's drilled several wells, and it works. Currently, it's the first and only acoustic telemetry tool that can withstand the drilling environment. It broadcasts one way over a limited range at much faster rates than existing methods, but we also know how build a system that can communicate both up and down wells of indefinite length.

Drumheller, Douglas Schaeffer; Kuszmaul, Scott S.

2003-08-01T23:59:59.000Z

123

The Autonomous Pathogen Detection System (APDS)  

SciTech Connect

Shaped like a mailbox on wheels, it's been called a bioterrorism ''smoke detector.'' It can be found in transportation hubs such as airports and subways, and it may be coming to a location near you. Formally known as the Autonomous Pathogen Detection System, or APDS, this latest tool in the war on bioterrorism was developed at Lawrence Livermore National Laboratory to continuously sniff the air for airborne pathogens and toxins such as anthrax or plague. The APDS is the modern day equivalent of the canaries miners took underground with them to test for deadly carbon dioxide gas. But this canary can test for numerous bacteria, viruses, and toxins simultaneously, report results every hour, and confirm positive samples and guard against false positive results by using two different tests. The fully automated system collects and prepares air samples around the clock, does the analysis, and interprets the results. It requires no servicing or human intervention for an entire week. Unlike its feathered counterpart, when an APDS unit encounters something deadly in the air, that's when it begins singing, quietly. The APDS unit transmits a silent alert and sends detailed data to public health authorities, who can order evacuation and begin treatment of anyone exposed to toxic or biological agents. It is the latest in a series of biodefense detectors developed at DOE/NNSA national laboratories. The manual predecessor to APDS, called BASIS (for Biological Aerosol Sentry and Information System), was developed jointly by Los Alamos and Lawrence Livermore national laboratories. That system was modified to become BioWatch, the Department of Homeland Security's biological urban monitoring program. A related laboratory instrument, the Handheld Advanced Nucleic Acid Analyzer (HANAA), was first tested successfully at LLNL in September 1997. Successful partnering with private industry has been a key factor in the rapid advancement and deployment of biodefense instruments such as these. The APDS technology has been licensed and is currently undergoing commercialization.

Morris, J; Dzenitis, J

2004-09-22T23:59:59.000Z

124

Prototype steam generator test at SCTI/ETEC. Acoustic program test plan. [LMFBR  

SciTech Connect

This document is an integrated test plan covering programs at General Electric (ARSD), Rockwell International (RI) and Argonne National Laboratory (CT). It provides an overview of the acoustic leak detection test program which will be completed in conjunction with the prototype LMFBR steam generator at the Energy Technology Engineering Laboratory. The steam generator is installed in the Sodium Components Test Installation (SCTI). Two acoustic detection systems will be used during the test program, a low frequency system developed by GE-ARSD (GAAD system) and a high frequency system developed by RI-AI (HALD system). These systems will be used to acquire data on background noise during the thermal-hydraulic test program. Injection devices were installed during fabrication of the prototype steam generator to provide localized noise sources in the active region of the tube bundle. These injectors will be operated during the steam generator test program, and it will be shown that they are detected by the acoustic systems.

Greene, D.A.; Thiele, A.; Claytor, T.N.

1981-10-01T23:59:59.000Z

125

Compact acoustic refrigerator  

DOE Patents (OSTI)

A compact acoustic refrigeration system actively cools components, e.g., electrical circuits, in a borehole environment. An acoustic engine includes first thermodynamic elements for generating a standing acoustic wave in a selected medium. An acoustic refrigerator includes second thermodynamic elements located in the standing wave for generating a relatively cold temperature at a first end of the second thermodynamic elements and a relatively hot temperature at a second end of the second thermodynamic elements. A resonator volume cooperates with the first and second thermodynamic elements to support the standing wave. To accommodate the high heat fluxes required for heat transfer to/from the first and second thermodynamic elements, first heat pipes transfer heat from the heat load to the second thermodynamic elements and second heat pipes transfer heat from first and second thermodynamic elements to the borehole environment. 18 figs.

Bennett, G.A.

1992-11-24T23:59:59.000Z

126

Compact acoustic refrigerator  

DOE Patents (OSTI)

This invention is comprised of a compact acoustic refrigeration system that actively cools components, e.g., electrical circuits, in a borehole environment. An acoustic engine includes first thermodynamic elements for generating a standing acoustic wave in a selected medium. An acoustic refrigerator includes second thermodynamic elements located in the standing wave for generating a relatively cold temperature at a first end of the second thermodynamic elements and a relatively hot temperature at a second end of the second thermodynamic elements. A resonator volume cooperates with the first and second thermodynamic elements to support the standing wave. To accommodate the high heat fluxes required for heat transfer to/from the first and second thermodynamic elements, first heat pipes transfer heat from the heat load to the second thermodynamic elements and second heat pipes transfer heat from first and second thermodynamic elements to the borehole environment.

Bennett, G.A.

1991-12-31T23:59:59.000Z

127

Compact acoustic refrigerator  

DOE Patents (OSTI)

A compact acoustic refrigeration system actively cools components, e.g., electrical circuits (22), in a borehole environment. An acoustic engine (12, 14) includes first thermodynamic elements (12) for generating a standing acoustic wave in a selected medium. An acoustic refrigerator (16, 26, 28) includes second thermodynamic elements (16) located in the standing wave for generating a relatively cold temperature at a first end of the second thermodynamic elements (16) and a relatively hot temperature at a second end of the second thermodynamic elements (16). A resonator volume (18) cooperates with the first and second thermodynamic elements (12, 16) to support the standing wave. To accommodate the high heat fluxes required for heat transfer to/from the first and second thermodynamic elements (12, 16), first heat pipes (24, 26) transfer heat from the heat load (22) to the second thermodynamic elements (16) and second heat pipes (28, 32) transfer heat from first and second thermodynamic elements (12, 16) to the borehole environment.

Bennett, Gloria A. (Los Alamos, NM)

1992-01-01T23:59:59.000Z

128

System for generating a beam of acoustic energy from a borehole, and applications thereof  

DOE Patents (OSTI)

In some aspects of the invention, a device, positioned within a well bore, configured to generate and direct an acoustic beam into a rock formation around a borehole is disclosed. The device comprises a source configured to generate a first signal at a first frequency and a second signal at a second frequency; a transducer configured to receive the generated first and the second signals and produce acoustic waves at the first frequency and the second frequency; and a non-linear material, coupled to the transducer, configured to generate a collimated beam with a frequency equal to the difference between the first frequency and the second frequency by a non-linear mixing process, wherein the non-linear material includes one or more of a mixture of liquids, a solid, a granular material, embedded microspheres, or an emulsion.

Vu, Cung Khac; Sinha, Dipen N.; Pantea, Cristian; Nihei, Kurt T.; Schmitt, Denis P.; Skelt, Christopher

2012-09-04T23:59:59.000Z

129

System for generating a beam of acoustic energy from a borehole, and applications thereof  

DOE Patents (OSTI)

In some aspects of the invention, a device, positioned within a well bore, configured to generate and direct an acoustic beam into a rock formation around a borehole is disclosed. The device comprises a source configured to generate a first signal at a first frequency and a second signal at a second frequency; a transducer configured to receive the generated first and the second signals and produce acoustic waves at the first frequency and the second frequency; and a non-linear material, coupled to the transducer, configured to generate a collimated beam with a frequency equal to the difference between the first frequency and the second frequency by a non-linear mixing process, wherein the non-linear material includes one or more of a mixture of liquids, a solid, a granular material, embedded microspheres, or an emulsion.

Vu, Cung Khac (Houston, TX); Sinha, Dipen N. (Los Alamos, NM); Pantea, Cristian (Los Alamos, NM); Nihei, Kurt T. (Oakland, CA); Schmitt, Denis P. (Katy, TX); Skelt, Christopher (Houston, TX)

2012-07-31T23:59:59.000Z

130

Computer system performance problem detection using time series models  

Science Conference Proceedings (OSTI)

Computer systems require monitoring to detect performance anomalies such as runaway processes, but problem detection and diagnosis is a complex task requiring skilled attention. Although human attention was never ideal for this task, as networks of computers ...

Peter Hoogenboom; Jay Lepreau

1993-06-01T23:59:59.000Z

131

Research on energy consumption detection system based on OPC technology  

Science Conference Proceedings (OSTI)

For developing of energy consumption detection systems, the system integration becomes more and more difficult. The OPC Object Linking and Embedding OLE for process control technology is used to simplify the problem. The system integration can be improved ...

Changtao Wang; Zhonghua Han; Bin Ma

2013-06-01T23:59:59.000Z

132

System and method for detecting cells or components thereof  

DOE Patents (OSTI)

A system and method for detecting a detectably labeled cell or component thereof in a sample comprising one or more cells or components thereof, at least one cell or component thereof of which is detectably labeled with at least two detectable labels. In one embodiment, the method comprises: (i) introducing the sample into one or more flow cells of a flow cytometer, (ii) irradiating the sample with one or more light sources that are absorbed by the at least two detectable labels, the absorption of which is to be detected, and (iii) detecting simultaneously the absorption of light by the at least two detectable labels on the detectably labeled cell or component thereof with an array of photomultiplier tubes, which are operably linked to two or more filters that selectively transmit detectable emissions from the at least two detectable labels.

Porter, Marc D. (Ames, IA); Lipert, Robert J. (Ames, IA); Doyle, Robert T. (Ames, IA); Grubisha, Desiree S. (Corona, CA); Rahman, Salma (Ames, IA)

2009-01-06T23:59:59.000Z

133

NW-MILO Acoustic Data Collection  

SciTech Connect

There is an enduring requirement to improve our ability to detect potential threats and discriminate these from the legitimate commercial and recreational activity ongoing in the nearshore/littoral portion of the maritime domain. The Northwest Maritime Information and Littoral Operations (NW-MILO) Program at PNNL’s Coastal Security Institute in Sequim, Washington is establishing a methodology to detect and classify these threats - in part through developing a better understanding of acoustic signatures in a near-shore environment. The purpose of the acoustic data collection described here is to investigate the acoustic signatures of small vessels. The data is being recorded continuously, 24 hours a day, along with radar track data and imagery. The recording began in August 2008, and to date the data contains tens of thousands of signals from small vessels recorded in a variety of environmental conditions. The quantity and variety of this data collection, with the supporting imagery and radar track data, makes it particularly useful for the development of robust acoustic signature models and advanced algorithms for signal classification and information extraction. The underwater acoustic sensing system is part of a multi-modal sensing system that is operating near the mouth of Sequim Bay. Sequim Bay opens onto the Straight of Juan de Fuca, which contains part of the border between the U.S. and Canada. Table 1 lists the specific components used for the NW-MILO system. The acoustic sensor is a hydrophone permanently deployed at a mean depth of about 3 meters. In addition to a hydrophone, the other sensors in the system are a marine radar, an electro-optical (EO) camera and an infra-red (IR) camera. The radar is integrated with a vessel tracking system (VTS) that provides position, speed and heading information. The data from all the sensors is recorded and saved to a central server. The data has been validated in terms of its usability for characterizing the signatures of small vessels. The sampling rate of 8 kHz and low pass filtering to 2 kHz results in an alias-free signal in the frequency band that is appropriate for small vessels. Calibration was performed using a Lubell underwater speaker so that the raw data signal levels can be converted to sound pressure. Background noise is present due to a nearby pump and as a result of tidal currents. More study is needed to fully characterize the noise, but it does not pose an obstacle to using the acoustic data for the purposes of vessel detection and signature analysis. The detection range for a small vessel was estimated using the calibrated voltage response of the system and a cylindrical spreading model for transmission loss. The sound pressure of a typical vessel with an outboard motor was found to be around 140 dB mPa, and could theoretically be detected from 10 km away. In practical terms, a small vessel could reliably be detected from 3 - 5 km away. The data is archived in netCDF files, a standard scientific file format that is "self describing". This means that each data file contains the metadata - timestamps, units, origin, etc. - needed to make the data meaningful and portable. Other file formats, such as XML, are also supported. A visualization tool has been developed to view the acoustic data in the form of spectrograms, along with the coincident radar track data and camera images.

Matzner, Shari; Myers, Joshua R.; Maxwell, Adam R.; Jones, Mark E.

2010-02-17T23:59:59.000Z

134

Fault Detection and Diagnosis in Building HVAC Systems  

E-Print Network (OSTI)

Wright, “Condition monitoring in HVAC subsystems using firstmonitoring packaged HVAC equipment. ASHRAE Transactions”,Detection and Diagnosis of HVAC Systems Using Support Vector

Najafi, Massieh

2010-01-01T23:59:59.000Z

135

Millimeter-Wave Systems Track Biometrics; Detect Chemicals ...  

emergency responders. Scientists at Argonne National Laboratory have devised two unique mmW detection systems to meet these needs. One—a first-of-

136

Best Management Practice: Distribution System Audits, Leak Detection, and  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Best Management Practice: Distribution System Audits, Leak Best Management Practice: Distribution System Audits, Leak Detection, and Repair Best Management Practice: Distribution System Audits, Leak Detection, and Repair October 7, 2013 - 3:06pm Addthis A distribution system audit, leak detection, and repair programs help Federal facilities reduce water losses and make better use of limited water resources. Overview Federal facilities with large campus settings and expansive distribution systems can lose a significant amount of total water production and purchases to system leaks. Leaks in distribution systems are caused by a number of factors, including pipe corrosion, high system pressure, construction disturbances, frost damage, damaged joints, and ground shifting and settling. Regular distribution system leak detection surveys

137

A wireless interrogation system exploiting narrowband acoustic resonator for remote physical quantity measurement  

SciTech Connect

Monitoring physical quantities using acoustic wave devices can be advantageously achieved using the wave characteristic dependence to various parametric perturbations (temperature, stress, and pressure). Surface acoustic wave (SAW) resonators are particularly well suited to such applications as their resonance frequency is directly influenced by these perturbations, modifying both the phase velocity and resonance conditions. Moreover, the intrinsic radio frequency (rf) nature of these devices makes them ideal for wireless applications, mainly exploiting antennas reciprocity and piezoelectric reversibility. In this paper, we present a wireless SAW sensor interrogation unit operating in the 434 MHz centered ISM band--selected as a tradeoff between antenna dimensions and electromagnetic wave penetration in dielectric media--based on the principles of a frequency sweep network analyzer. We particularly focus on the compliance with the ISM standard which reveals complicated by the need for switching from emission to reception modes similarly to radar operation. In this matter, we propose a fully digital rf synthesis chain to develop various interrogation strategies to overcome the corresponding difficulties and comply with the above-mentioned standard. We finally assess the reader interrogation range, accuracy, and dynamics.

Friedt, J.-M [SENSeOR, 32 Avenue de l'Observatoire, 25044 Besancon (France); Droit, C.; Martin, G.; Ballandras, S. [Department of Time and Frequency, FEMTO-ST, 32 Avenue de l'Observatoire, 25044 Besancon (France)

2010-01-15T23:59:59.000Z

138

OPERATING PROCEDURE FOR THE PORTABLE ACOUSTIC MONITORING PACKAGE (PAMP)  

Science Conference Proceedings (OSTI)

The Portable Acoustic Monitoring Package (PAMP) has been designed to record and monitor acoustic signals in high-pressure natural gas (NG) transmission lines. Of particular interest are the three acoustic signals associated with a pipeline fracture. The system is portable (less than 30 lbm) and can be used at all line pressures up to 1000 psig. The PAMP requires a shut-off valve equipped 1/2 inch NPT access port in the pipeline. It is fully functional over the typical pressure range found in the natural gas transmission pipelines in the West Virginia, Virginia, Pennsylvania, and Ohio areas. With the use of the PAMP, a full spectrum of acoustic signals can be recorded and defined in terms of acoustic energy in decibels. To detect natural gas pipeline infringements and leaks, the acoustic energy generated inside the line is monitored with a sensitive pressure-equalized microphone and a step function type {Delta}p transducer. The assembly is mounted on a 1000 psig pipe fitting-tree called the PAMP. The electronics required to record, store and analyze the data are described within this report in the format of an operating manual.

John L. Loth; Gary J. Morris; George M. Palmer; Richard Guiler; Patrick Browning

2004-08-29T23:59:59.000Z

139

Phase and amplitude detection system for the Stanford Linear Accelerator  

Science Conference Proceedings (OSTI)

A computer controlled phase and amplitude detection system to measure and stabilize the rf power sources in the Stanford Linear Accelerator is described. This system measures the instantaneous phase and amplitude of a 1 microsecond 2856 MHz rf pulse and will be used for phase feedback control and for amplitude and phase jitter detection. This paper discusses the measurement system performance requirements for the operation of the Stanford Linear Collider, and the design and implementation of the phase and amplitude detection system. The fundamental software algorithms used in the measurement are described, as is the performance of the prototype phase and amplitude detector system.

Fox, J.D.; Schwarz, H.D.

1983-01-01T23:59:59.000Z

140

Intrusion detection in sensor networks using clustering and immune systems  

Science Conference Proceedings (OSTI)

Security of sensor networks is a complicated task, mostly due to the limited resources of sensor units. Encryption and authentication are useless if an attacker has entered the system. Thus, a second line of defense known as Intrusion Detection must ... Keywords: genetic algorithms, immune systems, intrusion detection, self-organizing maps, wireless sensor networks

Zorana Bankovi?; José M. Moya; Álvaro Araujo; Juan-Mariano De Goyeneche

2009-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Ultrafast photo-acoustic spectroscopy of super-cooled liquids  

E-Print Network (OSTI)

Picosecond laser ultrasonic techniques for acoustic wave generation and detection were adapted to probe longitudinal and transverse acoustic waves in liquids at gigahertz frequencies. The experimental effort was designed ...

Klieber, Christoph

2010-01-01T23:59:59.000Z

142

Intrusion Detection System for Advanced Metering Infrastructure  

Science Conference Proceedings (OSTI)

The deployment of Advanced Metering Infrastructure (AMI) technology significantly increases the attack surface that utilities have to protect. As a result, there is a critical need for efficient monitoring solutions to supplement protective measures and keep the infrastructure secure. This document investigates current industrial and academic efforts to address the challenge of detecting security events across the range of AMI networks and devices. The goal of this study is to help utilities and ...

2012-12-31T23:59:59.000Z

143

Explosive simulants for testing explosive detection systems  

DOE Patents (OSTI)

Explosives simulants that include non-explosive components are disclosed that facilitate testing of equipment designed to remotely detect explosives. The simulants are non-explosive, non-hazardous materials that can be safely handled without any significant precautions. The simulants imitate real explosives in terms of mass density, effective atomic number, x-ray transmission properties, and physical form, including moldable plastics and emulsions/gels.

Kury, John W. (Danville, CA); Anderson, Brian L. (Lodi, CA)

1999-09-28T23:59:59.000Z

144

Online Fault Detection and Tolerance for Photovoltaic Energy Harvesting Systems  

E-Print Network (OSTI)

Online Fault Detection and Tolerance for Photovoltaic Energy Harvesting Systems Xue Lin 1 , Yanzhi, yanzhiwa, dizhu, pedram}@usc.edu, 2 naehyuck@elpl.snu.ac.kr ABSTRACT Photovoltaic energy harvesting systems (PV systems) are subject to PV cell faults, which decrease the efficiency of PV systems and even

Pedram, Massoud

145

An Intrusion Detection System Using Quantum- mechanical Systems  

Technology Description A quantum mechanical-based device that detects an intrusion across a physical boundary or communication link. Because common

146

Systems for detecting charged particles in object inspection  

DOE Patents (OSTI)

Techniques, apparatus and systems for detecting particles such as muons. In one implementation, a monitoring system has a cosmic ray-produced charged particle tracker with a plurality of drift cells. The drift cells, which can be for example aluminum drift tubes, can be arranged at least above and below a volume to be scanned to thereby track incoming and outgoing charged particles, such as cosmic ray-produced muons, while also detecting gamma rays. The system can selectively detect devices or materials, such as iron, lead, gold and/or tungsten, occupying the volume from multiple scattering of the charged particles passing through the volume and can also detect any radioactive sources occupying the volume from gamma rays emitted therefrom. If necessary, the drift tubes can be sealed to eliminate the need for a gas handling system. The system can be employed to inspect occupied vehicles at border crossings for nuclear threat objects.

Morris, Christopher L.; Makela, Mark F.

2013-08-20T23:59:59.000Z

147

Forest Products: Acoustic Humidity Sensor  

SciTech Connect

The new acoustic sensor, designed as a humidity-control system for the paper and textile industries, can both eliminate overdrying and improve product quality by measuring humidity precisely. This new fact sheet explains how the process works.

Poole, L.; Recca, L.

1999-01-29T23:59:59.000Z

148

Network-wide deployment of intrusion detection and prevention systems  

Science Conference Proceedings (OSTI)

Traditional efforts for scaling network intrusion detection (NIDS) and intrusion prevention systems (NIPS) have largely focused on a single-vantage-point view. In this paper, we explore an alternative design that exploits spatial, network-wide opportunities ... Keywords: intrusion detection, network management

Vyas Sekar; Ravishankar Krishnaswamy; Anupam Gupta; Michael K. Reiter

2010-11-01T23:59:59.000Z

149

Design and Evaluation of Hybrid Fault-Detection Systems  

Science Conference Proceedings (OSTI)

As chip densities and clock rates increase, processors are becoming more susceptible to transient faults that can affect program correctness. Up to now, system designers have primarily considered hardware-only and software-only fault-detection mechanisms ...

George A. Reis; Jonathan Chang; Neil Vachharajani; Ram Rangan; David I. August; Shubhendu S. Mukherjee

2005-06-01T23:59:59.000Z

150

Occupancy change detection system and method  

DOE Patents (OSTI)

A robot platform includes perceptors, locomotors, and a system controller. The system controller executes instructions for producing an occupancy grid map of an environment around the robot, scanning the environment to generate a current obstacle map relative to a current robot position, and converting the current obstacle map to a current occupancy grid map. The instructions also include processing each grid cell in the occupancy grid map. Within the processing of each grid cell, the instructions include comparing each grid cell in the occupancy grid map to a corresponding grid cell in the current occupancy grid map. For grid cells with a difference, the instructions include defining a change vector for each changed grid cell, wherein the change vector includes a direction from the robot to the changed grid cell and a range from the robot to the changed grid cell.

Bruemmer, David J. (Idaho Falls, ID); Few, Douglas A. (Idaho Falls, ID)

2009-09-01T23:59:59.000Z

151

THE EFFECT OF ACOUSTIC MODULATION ON SPRAY ...  

Science Conference Proceedings (OSTI)

... that at full load in liquid injection systems, extra energy or perturbation is ... The acoustic modulation is generated by a piezoelectric crystal driven by a ...

152

Methods and systems for remote detection of gases  

SciTech Connect

Novel systems and methods for remotely detecting at least one constituent of a gas via infrared detection are provided. A system includes at least one extended source of broadband infrared radiation and a spectrally sensitive receiver positioned remotely from the source. The source and the receiver are oriented such that a surface of the source is in the field of view of the receiver. The source includes a heating component thermally coupled to the surface, and the heating component is configured to heat the surface to a temperature above ambient temperature. The receiver is operable to collect spectral infrared absorption data representative of a gas present between the source and the receiver. The invention advantageously overcomes significant difficulties associated with active infrared detection techniques known in the art, and provides an infrared detection technique with a much greater sensitivity than passive infrared detection techniques known in the art.

Johnson, Timothy J

2012-09-18T23:59:59.000Z

153

Fault detection of multivariable system using its directional properties  

E-Print Network (OSTI)

A novel algorithm for making the combination of outputs in the output zero direction of the plant always equal to zero was formulated. Using this algorithm and the result of MacFarlane and Karcanias, a fault detection scheme was proposed which utilizes the directional property of the multivariable linear system. The fault detection scheme is applicable to linear multivariable systems. Results were obtained for both continuous and discrete linear multivariable systems. A quadruple tank system was used to illustrate the results. The results were further verified by the steady state analysis of the plant.

Pandey, Amit Nath

2004-12-01T23:59:59.000Z

154

Strategies To Detect Hidden Geothermal Systems Based On Monitoring and  

Open Energy Info (EERE)

To Detect Hidden Geothermal Systems Based On Monitoring and To Detect Hidden Geothermal Systems Based On Monitoring and Analysis Of CO2 In The Near-Surface Environment Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Strategies To Detect Hidden Geothermal Systems Based On Monitoring and Analysis Of CO2 In The Near-Surface Environment Details Activities (5) Areas (1) Regions (0) Abstract: We investigate the potential for CO2 monitoring in thenear-surface environment as an approach to exploration for hiddengeothermal systems. Numerical simulations of CO2 migration from a modelhidden geothermal system show that CO2 concentrations can reach highlevels in the shallow subsurface even for relatively low CO2 fluxes.Therefore, subsurface measurements offer an advantage over above-groundmeasurements which are affected by winds that rapidly disperse

155

Angle Instability Detection in Power Systems with High Wind Penetration  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Angle Instability Detection in Power Angle Instability Detection in Power Systems with High Wind Penetration Using PMUs YC Zhang National Renewable Energy Laboratory Yingchen.zhang@nrel.gov 27/28 June 2013 Washington, DC DOE/OE Transmission Reliability Program Angle Instability Detection in Power Systems with High Wind Penetration Using Synchrophasor Measurements  Project Objective * Utilize synchrophasor measurements to estimate the equivalent inertia of a power source such as synchronous generators or wind turbine generators * Develop angle instability detection method for a system with high wind penetration using the synchrophasor measurements 2 3 Background Submitted to IEEE Journal of Emerging and Selected Topics in Power Electronics * In case of angular instability, some machines will have

156

Proceedings of the 11 European Conference on Underwater Acoustics  

E-Print Network (OSTI)

Proceedings of the 11 th European Conference on Underwater Acoustics INCOHERENT CHANGE DETECTION on Underwater Acoustics images. This allows performing a segmentation of the master image at the coarser stage,version1-7Sep2012 #12;Proceedings of the 11 th European Conference on Underwater Acoustics The idea

Paris-Sud XI, Université de

157

SQLIA detection and prevention approach for RFID systems  

Science Conference Proceedings (OSTI)

While SQL injection attacks have been plaguing web application systems for years, the possibility of them affecting RFID systems was only identified very recently. However, very little work exists to mitigate this serious security threat to RFID-enabled ... Keywords: Detection and prevention, RFID, SQL injection attack, Security, Tag-born malware

Jemal Abawajy

2013-03-01T23:59:59.000Z

158

A Fault Detection and Diagnosis Method for HVAC Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

A Fault Detection and Diagnosis Method for HVAC Systems A Fault Detection and Diagnosis Method for HVAC Systems Speaker(s): Peng Xu Date: December 2, 2002 - 12:00pm Location: Bldg. 90 There is a growing consensus that most buildings do not perform as well as intended and that faults in HVAC systems are widespread in commercial buildings. An automated fault detection and diagnosis tool for HVAC systems is being developed, based on an integrated, life-cycle, approach to commissioning and performance monitoring. The tool uses component-level HVAC equipment models implemented in the SPARK equation-based simulation environment. The models are configured using design information and component manufacturers' data and then fine-tuned to match the actual performance of the equipment by using data measured during functional tests

159

Underwater Nonlinear Acoustic Speaker.  

E-Print Network (OSTI)

??In this work an acoustic parametric array for underwater use was designed, built and tested. An acoustic parametric array creates a focused beam of sound… (more)

Andersson, Sara

2011-01-01T23:59:59.000Z

160

Strategies for Detecting Hidden Geothermal Systems by Near-Surface Gas Monitoring  

E-Print Network (OSTI)

for Detection of Hidden Geothermal Systems Figure 7.4.for Detection of Hidden Geothermal Systems Figure 7.5.for Detection of Hidden Geothermal Systems Figure 7.6.

Lewicki, Jennifer L.; Oldenburg, Curtis M.

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

ANOLE Portable Radiation Detection System Field Test and Evaluation Campaign  

SciTech Connect

Handheld, backpack, and mobile sensors are elements of the Global Nuclear Detection System for the interdiction and control of illicit radiological and nuclear materials. They are used by the U.S. Department of Homeland Security (DHS) and other government agencies and organizations in various roles for border protection, law enforcement, and nonproliferation monitoring. In order to systematically document the operational performance of the common commercial off-the-shelf portable radiation detection systems, the DHS Domestic Nuclear Detection Office conducted a test and evaluation campaign conducted at the Nevada Test Site from January 18 to February 27, 2006. Named “Anole,” it was the first test of its kind in terms of technical design and test complexities. The Anole test results offer users information for selecting appropriate mission-specific portable radiation detection systems. The campaign also offered manufacturers the opportunity to submit their equipment for independent operationally relevant testing to subsequently improve their detector performance. This paper will present the design, execution, and methodologies of the DHS Anole portable radiation detection system test campaign.

Chris A. Hodge

2007-07-12T23:59:59.000Z

162

Acoustic transducer  

DOE Patents (OSTI)

An acoustic transducer is described comprising a one-piece hollow mandrel into the outer surface of which is formed a recess with sides perpendicular to the central axis of the mandrel and separated by a first distance and with a bottom parallel to the central axis and within which recess are a plurality of washer-shaped discs of a piezoelectric material and at least one disc of a temperature-compensating material with the discs being captured between the sides of the recess in a pre-stressed interference fit, typically at 2,000 psi of compressive stress. The transducer also includes a power supply and means to connect to a measurement device. The transducer is intended to be used for telemetry between a measurement device located downhole in an oil or gas well and the surface. The transducer is of an construction that is stronger with fewer joints that could leak fluids into the recess holding the piezoelectric elements than is found in previous acoustic transducers. 4 figs.

Drumheller, D.S.

1997-12-30T23:59:59.000Z

163

Acoustic transducer  

DOE Patents (OSTI)

An acoustic transducer comprising a one-piece hollow mandrel into the outer surface of which is formed a recess with sides perpendicular to the central axis of the mandrel and separated by a first distance and with a bottom parallel to the central axis and within which recess are a plurality of washer-shaped discs of a piezoelectric material and at least one disc of a temperature-compensating material with the discs being captured between the sides of the recess in a pre-stressed interference fit, typically at 2000 psi of compressive stress. The transducer also includes a power supply and means to connect to a measurement device. The transducer is intended to be used for telemetry between a measurement device located downhole in an oil or gas well and the surface. The transducer is of an construction that is stronger with fewer joints that could leak fluids into the recess holding the piezoelectric elements than is found in previous acoustic transducers.

Drumheller, Douglas S. (Cedar Crest, NM)

1997-01-01T23:59:59.000Z

164

Development and Field Testing of Laser Photodiode Array-Based Vehicle Detection Systems  

E-Print Network (OSTI)

A Real-Time Laser-Based Detection System for Measurement ofTime Laser-Based Prototype Detection System for Measurement

2004-01-01T23:59:59.000Z

165

The synchronous active neutron detection system for spent fuel assay  

SciTech Connect

The authors have begun to develop a novel technique for active neutron assay of fissile material in spent nuclear fuel. This approach will exploit the unique operating features of a 14-MeV neutron generator developed by Schlumberger. This generator and a novel detection system will be applied to the direct measurement of the fissile material content in spent fuel in place of the indirect measures used at present. The technique they are investigating is termed synchronous active neutron detection (SAND). It closely follows a method that has been used routinely in other branches of physics to detect very small signals in the presence of large backgrounds. Synchronous detection instruments are widely available commercially and are termed {open_quotes}lock-in{close_quotes} amplifiers. The authors have implemented a digital lock-in amplifier in conjunction with the Schlumberger neutron generator to explore the possibility of synchronous detection with active neutrons. This approach is possible because the Schlumberger system can operate at up to a 50% duty factor, in effect, a square wave of neutron yield. The results to date are preliminary but quite promising. The system is capable of resolving the fissile material contained in a small fraction of the fuel rods in a cold fuel assembly. It also appears to be quite resilient to background neutron interference. The interrogating neutrons appear to be nonthermal and penetrating. Although a significant amount of work remains to fully explore the relevant physics and optimize the instrument design, the underlying concept appears sound.

Pickrell, M.M.; Kendall, P.K.

1994-10-01T23:59:59.000Z

166

Spatiotemporal processing and time-reversal for underwater acoustic communications  

E-Print Network (OSTI)

High-rate underwater acoustic communication can be achieved using transmitter/receiver arrays. Underwater acoustic channels can be characterized as rapidly time-varying systems that suffer severe Inter Symbol Interferences ...

Wang, Daniel Y

2005-01-01T23:59:59.000Z

167

Polaris: A GPS-Navigated Ocean Acoustic Current Profiler  

Science Conference Proceedings (OSTI)

Results from an initial feasibility study to test whether Global Positioning System (GPS) navigation can be combined with more traditional acoustic methods to measure ocean current profiles are presented. A typical acoustic current profiler such ...

Kevin D. Leaman; Peter S. Vertes; Chris Rocken

1995-06-01T23:59:59.000Z

168

A Smart Sensor System for Carbon Monoxide Detection  

Science Conference Proceedings (OSTI)

This paper illustrates a smart sensor system for carbon monoxide detection. An innovative technological approach has been pursued to fabricate gas sensors on silicon substrate, compatible with IC fabrication. A mixed analog-digital electronic interface processes ... Keywords: sensor interfaces, sensors, sigma-delta converters

G. C. Cardinali; L. Dori; M. Fiorini; I. Sayago; G. Faglia; C. Perego; G. Sberveglieri; V. Liberali; F. Maloberti; D. Tonietto

1997-11-01T23:59:59.000Z

169

Acoustic cryocooler  

DOE Patents (OSTI)

An acoustic cryocooler with no moving parts is formed from a thermoacoustic driver (TAD) driving a pulse tube refrigerator (PTR) through a standing wave tube. Thermoacoustic elements in the TAD are spaced apart a distance effective to accommodate the increased thermal penetration length arising from the relatively low TAD operating frequency in the range of 15-60 Hz. At these low operating frequencies, a long tube is required to support the standing wave. The tube may be coiled to reduce the overall length of the cryocooler. One or two PTR's are located on the standing wave tube adjacent antinodes in the standing wave to be driven by the standing wave pressure oscillations. It is predicted that a heat input of 1000 W at 1000 K will maintain a cooling load of 5 W at 80 K. 3 figs.

Swift, G.W.; Martin, R.A.; Radebaugh, R.

1989-09-26T23:59:59.000Z

170

Acoustic cryocooler  

DOE Patents (OSTI)

An acoustic cryocooler with no moving parts is formed from a thermoacoustic driver (TAD) driving a pulse tube refrigerator (PTR) through a standing wave tube. Thermoacoustic elements in the TAD are spaced apart a distance effective to accommodate the increased thermal penetration length arising from the relatively low TAD operating frequency in the range of 15-60 Hz. At these low operating frequencies, a long tube is required to support the standing wave. The tube may be coiled to reduce the overall length of the cryocooler. One or two PTR's are located on the standing wave tube adjacent antinodes in the standing wave to be driven by the standing wave pressure oscillations. It is predicted that a heat input of 1000 W at 1000 K will maintian a cooling load of 5 W at 80 K.

Swift, Gregory W. (Santa Fe, NM); Martin, Richard A. (Los Alamos, NM); Radenbaugh, Ray (Louisville, CO)

1990-01-01T23:59:59.000Z

171

Incipient Transient Detection in Reactor Systems: Experimental and Theoretical Investigation  

SciTech Connect

The main goal of this research was to develop a method for detecting reactor system transients at the earliest possible time through a comprehensive experimental, testing and benchmarking program. This approach holds strong promise for developing new diagnostic technologies that are non-intrusive, generic and highly portable across different systems. It will help in the design of new generation nuclear power reactors, which utilize passive safety systems with a reliable and non-intrusive multiphase flow diagnostic system to monitor the function of the passive safety systems. The main objective of this research was to develop an improved fuzzy logic based detection method based on a comprehensive experimental testing program to detect reactor transients at the earliest possible time, practically at their birth moment. A fuzzy logic and neural network based transient identification methodology and implemented in a computer code called PROTREN was considered in this research and was compared with SPRT (Sequentially Probability Ratio Testing) decision and Bayesian inference. The project involved experiment, theoretical modeling and a thermal-hydraulic code assessment. It involved graduate and undergraduate students participation providing them with exposure and training in advanced reactor concepts and safety systems. In this final report, main tasks performed during the project period are summarized and the selected results are presented. Detailed descriptions for the tasks and the results are presented in previous yearly reports (Revankar et al 2003 and Revankar et al 2004).

Lefteri H. Tsoukalas; S.T. Revankar; X Wang; R. Sattuluri

2005-09-27T23:59:59.000Z

172

Distribution System Audits, Leak Detection, and Repair: Kirtland Air Force Base Leak Detection and Repair Program  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Best Management Practice Best Management Practice Case Study #3 Distribution System Audits, Leak Detection, and Repair Kirtland Air Force Base - Leak Detection and Repair Program Overview Kirtland Air Force Base (AFB) performed an award winning leak detection and repair program in 2006. The results of the project are saving Kirtland AFB 179 million gallons each year, which is over 16% of the total water use at the base. Kirtland AFB is located on 52,000 acres, southeast and adjacent to Albuquerque, New Mexico. The area is a high altitude desert, only receiving about 8 inches of rain each year. Kirtland AFB draws water from an under- ground aquifer via seven production wells through- out the base. The base also has access to water from the City of Albuquerque. The underground water

173

Distribution System Audits, Leak Detection, and Repair: Kirtland Air Force Base Leak Detection and Repair Program  

NLE Websites -- All DOE Office Websites (Extended Search)

Best Management Practice Best Management Practice Case Study #3 Distribution System Audits, Leak Detection, and Repair Kirtland Air Force Base - Leak Detection and Repair Program Overview Kirtland Air Force Base (AFB) performed an award winning leak detection and repair program in 2006. The results of the project are saving Kirtland AFB 179 million gallons each year, which is over 16% of the total water use at the base. Kirtland AFB is located on 52,000 acres, southeast and adjacent to Albuquerque, New Mexico. The area is a high altitude desert, only receiving about 8 inches of rain each year. Kirtland AFB draws water from an under- ground aquifer via seven production wells through- out the base. The base also has access to water from the City of Albuquerque. The underground water

174

Auditory system comparisons between sand cats and other felid species : acoustic input admittance of ears and auditory brainstem responses  

E-Print Network (OSTI)

The sand cat, one species of the cat family, is found only in deserts and has unusually large ear canals and middle-ear air cavities. Recent work has shown that sand cat ears absorb acoustic power at low frequencies (<1 ...

Chan, Howard F

2005-01-01T23:59:59.000Z

175

Capacitive discharge firing system for providing acoustic sources in the hot dry rock geothermal energy development project  

DOE Green Energy (OSTI)

The development of a capacitive discharge firing unit designed to initiate electrically exploded foil slapper detonators in a subsurface, high-pressure (5000 psi), high-temperature (> 200/sup 0/C) environment is described. The unit is used to conduct acoustic ranging experiments in deep boreholes (approx. = 10,000 ft) in the Los Alamos Scientific Laboratory Geothermal Hot Dry Rock experiment.

Patterson, W.W.; Deam, D.R.; MacDonald, H.J.; Rochester, R.H.

1979-07-01T23:59:59.000Z

176

Engineering Design of a Continuous Duty $\\gamma$ -Production Proton Target for the Contraband Detection System  

E-Print Network (OSTI)

Engineering Design of a Continuous Duty $\\gamma$ -Production Proton Target for the Contraband Detection System

Rathke, J; Klein, J

1999-01-01T23:59:59.000Z

177

Miniature Integrated Nuclear Detection System (MINDS) | Princeton Plasma  

NLE Websites -- All DOE Office Websites (Extended Search)

News Room News Archive American Fusion News Press Releases Publications Weekly Highlights White Papers Fact Sheets Newsletters PPPL News Princeton Journal Watch Blog Events Research Education Organization Contact Us News Room News Archive American Fusion News Press Releases Publications Weekly Highlights White Papers Fact Sheets Newsletters PPPL News Princeton Journal Watch Blog Miniature Integrated Nuclear Detection System (MINDS) Anti-terrorism efforts are getting a boost from the U.S. Department of Energy's Princeton Plasma Physics Laboratory (PPPL). A team led by PPPL engineer Charles Gentile has developed a Miniature Integrated Nuclear Detection System, called MINDS, which can be used to scan moving vehicles, luggage, cargo vessels, and the like for specific nuclear signatures

178

Iterated Function System Models in Data Analysis: Detection and Separation  

E-Print Network (OSTI)

We investigate the use of iterated function system (IFS) models for data analysis. An IFS is a discrete dynamical system in which each time step corresponds to the application of one of a finite collection of maps. The maps, which represent distinct dynamical regimes, may act in some pre-determined sequence or may be applied in random order. An algorithm is developed to detect the sequence of regime switches under the assumption of continuity. This method is tested on a simple IFS and applied to an experimental computer performance data set. This methodology has a wide range of potential uses: from change-point detection in time-series data to the field of digital communications.

Zachary Alexander; Elizabeth Bradley; Joshua Garland; James D. Meiss

2011-08-15T23:59:59.000Z

179

Neutron Interrogation System For Underwater Threat Detection And Identification  

Science Conference Proceedings (OSTI)

Wartime and terrorist activities, training and munitions testing, dumping and accidents have generated significant munitions contamination in the coastal and inland waters in the United States and abroad. Although current methods provide information about the existence of the anomaly (for instance, metal objects) in the sea bottom, they fail to identify the nature of the found objects. Field experience indicates that often in excess of 90% of objects excavated during the course of munitions clean up are found to be non-hazardous items (false alarm). The technology to detect and identify waterborne or underwater threats is also vital for protection of critical infrastructures (ports, dams, locks, refineries, and LNG/LPG). We are proposing a compact neutron interrogation system, which will be used to confirm possible threats by determining the chemical composition of the suspicious underwater object. The system consists of an electronic d-T 14-MeV neutron generator, a gamma detector to detect the gamma signal from the irradiated object and a data acquisition system. The detected signal then is analyzed to quantify the chemical elements of interest and to identify explosives or chemical warfare agents.

Barzilov, Alexander P.; Novikov, Ivan S.; Womble, Phil C. [Department of Physics and Astronomy, Western Kentucky University, 1906 College Heights Blvd, 11077 Bowling Green, KY 42101 (United States)

2009-03-10T23:59:59.000Z

180

Opto-acoustic thrombolysis  

DOE Patents (OSTI)

This invention is a catheter-based device for generating an ultrasound excitation in biological tissue. Pulsed laser light is guided through an optical fiber to provide the energy for producing the acoustic vibrations. The optical energy is deposited in a water-based absorbing fluid, e.g. saline, thrombolytic agent, blood or thrombus, and generates an acoustic impulse in the fluid through thermoelastic and/or thermodynamic mechanisms. By pulsing the laser at a repetition rate (which may vary from 10 Hz to 100 kHz) an ultrasonic radiation field can be established locally in the medium. This method of producing ultrasonic vibrations can be used in vivo for the treatment of stroke-related conditions in humans, particularly for dissolving thrombus or treating vasospasm. The catheter can also incorporate thrombolytic drug treatments as an adjunct therapy and it can be operated in conjunction with ultrasonic detection equipment for imaging and feedback control and with optical sensors for characterization of thrombus type and consistency.

Celliers, Peter (Berkeley, CA); Da Silva, Luiz (Danville, CA); Glinsky, Michael (Livermore, CA); London, Richard (Orinda, CA); Maitland, Duncan (Livermore, CA); Matthews, Dennis (Moss Beach, CA); Fitch, Pat (Livermore, CA)

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Opto-acoustic thrombolysis  

Science Conference Proceedings (OSTI)

This invention is a catheter-based device for generating an ultrasound excitation in biological tissue. Pulsed laser light is guided through an optical fiber to provide the energy for producing the acoustic vibrations. The optical energy is deposited in a water-based absorbing fluid, e.g. saline, thrombolytic agent, blood or thrombus, and generates an acoustic impulse in the fluid through thermoelastic and/or thermodynamic mechanisms. By pulsing the laser at a repetition rate (which may vary from 10 Hz to 100 kHz) an ultrasonic radiation field can be established locally in the medium. This method of producing ultrasonic vibrations can be used in vivo for the treatment of stroke-related conditions in humans, particularly for dissolving thrombus or treating vasospasm. The catheter can also incorporate thrombolytic drug treatments as an adjunct therapy and it can be operated in conjunction with ultrasonic detection equipment for imaging and feedback control and with optical sensors for characterization of thrombus type and consistency.

Celliers, P.; Silva, L. Da; Glinsky, M.; London, R.; Maitland, D.; Matthews, D.; Fitch, P.

2000-02-08T23:59:59.000Z

182

Operational Performance Analysis of Passive Acoustic Monitoring for Killer Whales  

SciTech Connect

For the planned tidal turbine site in Puget Sound, WA, the main concern is to protect Southern Resident Killer Whales (SRKW) due to their Endangered Species Act status. A passive acoustic monitoring system is proposed because the whales emit vocalizations that can be detected by a passive system. The algorithm for detection is implemented in two stages. The first stage is an energy detector designed to detect candidate signals. The second stage is a spectral classifier that is designed to reduce false alarms. The evaluation presented here of the detection algorithm incorporates behavioral models of the species of interest, environmental models of noise levels and potential false alarm sources to provide a realistic characterization of expected operational performance.

Matzner, Shari; Fu, Tao; Ren, Huiying; Deng, Zhiqun; Sun, Yannan; Carlson, Thomas J.

2011-09-30T23:59:59.000Z

183

Log Summarization and Anomaly Detection for TroubleshootingDistributed Systems  

SciTech Connect

Today's system monitoring tools are capable of detectingsystem failures such as host failures, OS errors, and network partitionsin near-real time. Unfortunately, the same cannot yet be said of theend-to-end distributed softwarestack. Any given action, for example,reliably transferring a directory of files, can involve a wide range ofcomplex and interrelated actions across multiple pieces of software:checking user certificates and permissions, getting details for allfiles, performing third-party transfers, understanding re-try policydecisions, etc. We present an infrastructure for troubleshooting complexmiddleware, a general purpose technique for configurable logsummarization, and an anomaly detection technique that works in near-realtime on running Grid middleware. We present results gathered using thisinfrastructure from instrumented Grid middleware and applications runningon the Emulab testbed. From these results, we analyze the effectivenessof several algorithms at accurately detecting a variety of performanceanomalies.

Gunter, Dan; Tierney, Brian L.; Brown, Aaron; Swany, Martin; Bresnahan, John; Schopf, Jennifer M.

2007-08-01T23:59:59.000Z

184

Detecting driver phone use leveraging car speakers  

Science Conference Proceedings (OSTI)

This work addresses the fundamental problem of distinguishing between a driver and passenger using a mobile phone, which is the critical input to enable numerous safety and interface enhancements. Our detection system leverages the existing car stereo ... Keywords: acoustic ranging, bluetooth, car speakers, driving safety, location classification, smartphone

Jie Yang; Simon Sidhom; Gayathri Chandrasekaran; Tam Vu; Hongbo Liu; Nicolae Cecan; Yingying Chen; Marco Gruteser; Richard P. Martin

2011-09-01T23:59:59.000Z

185

Methods and systems for detecting abnormal digital traffic  

DOE Patents (OSTI)

Aspects of the present invention encompass methods and systems for detecting abnormal digital traffic by assigning characterizations of network behaviors according to knowledge nodes and calculating a confidence value based on the characterizations from at least one knowledge node and on weighting factors associated with the knowledge nodes. The knowledge nodes include a characterization model based on prior network information. At least one of the knowledge nodes should not be based on fixed thresholds or signatures. The confidence value includes a quantification of the degree of confidence that the network behaviors constitute abnormal network traffic.

Goranson, Craig A [Kennewick, WA; Burnette, John R [Kennewick, WA

2011-03-22T23:59:59.000Z

186

Image change detection systems, methods, and articles of manufacture  

DOE Patents (OSTI)

Aspects of the invention relate to image change detection systems, methods, and articles of manufacture. According to one aspect, a method of identifying differences between a plurality of images is described. The method includes loading a source image and a target image into memory of a computer, constructing source and target edge images from the source and target images to enable processing of multiband images, displaying the source and target images on a display device of the computer, aligning the source and target edge images, switching displaying of the source image and the target image on the display device, to enable identification of differences between the source image and the target image.

Jones, James L. (Idaho Falls, ID); Lassahn, Gordon D. (Idaho Falls, ID); Lancaster, Gregory D. (Idaho Falls, ID)

2010-01-05T23:59:59.000Z

187

High Altitude Aerial Natural Gas Leak Detection System  

SciTech Connect

The objective of this program was to develop and demonstrate a cost-effective and power-efficient advanced standoff sensing technology able to detect and quantify, from a high-altitude (> 10,000 ft) aircraft, natural gas leaking from a high-pressure pipeline. The advanced technology is based on an enhanced version of the Remote Methane Leak Detector (RMLD) platform developed previously by Physical Sciences Inc. (PSI). The RMLD combines a telecommunications-style diode laser, fiber-optic components, and low-cost DSP electronics with the well-understood principles of Wavelength Modulation Spectroscopy (WMS), to indicate the presence of natural gas located between the operator and a topographic target. The transceiver transmits a laser beam onto a topographic target and receives some of the laser light reflected by the target. The controller processes the received light signal to deduce the amount of methane in the laser's path. For use in the airborne platform, we modified three aspects of the RMLD, by: (1) inserting an Erbium-doped optical fiber laser amplifier to increase the transmitted laser power from 10 mW to 5W; (2) increasing the optical receiver diameter from 10 cm to 25 cm; and (3) altering the laser wavelength from 1653 nm to 1618 nm. The modified RMLD system provides a path-integrated methane concentration sensitivity {approx}5000 ppm-m, sufficient to detect the presence of a leak from a high capacity transmission line while discriminating against attenuation by ambient methane. In ground-based simulations of the aerial leak detection scenario, we demonstrated the ability to measure methane leaks within the laser beam path when it illuminates a topographic target 2000 m away. We also demonstrated simulated leak detection from ranges of 200 m using the 25 cm optical receiver without the fiber amplifier.

Richard T. Wainner; Mickey B. Frish; B. David Green; Matthew C. Laderer; Mark G. Allen; Joseph R. Morency

2006-12-31T23:59:59.000Z

188

Detection optimization using linear systems analysis of a coded aperture laser sensor system  

SciTech Connect

Minimum detectable irradiance levels for a diffraction grating based laser sensor were calculated to be governed by clutter noise resulting from reflected earth albedo. Features on the earth surface caused pseudo-imaging effects on the sensor`s detector arras that resulted in the limiting noise in the detection domain. It was theorized that a custom aperture transmission function existed that would optimize the detection of laser sources against this clutter background. Amplitude and phase aperture functions were investigated. Compared to the diffraction grating technique, a classical Young`s double-slit aperture technique was investigated as a possible optimized solution but was not shown to produce a system that had better clutter-noise limited minimum detectable irradiance. Even though the double-slit concept was not found to have a detection advantage over the slit-grating concept, one interesting concept grew out of the double-slit design that deserved mention in this report, namely the Barker-coded double-slit. This diffractive aperture design possessed properties that significantly improved the wavelength accuracy of the double-slit design. While a concept was not found to beat the slit-grating concept, the methodology used for the analysis and optimization is an example of the application of optoelectronic system-level linear analysis. The techniques outlined here can be used as a template for analysis of a wide range of optoelectronic systems where the entire system, both optical and electronic, contribute to the detection of complex spatial and temporal signals.

Gentry, S.M. [Sandia National Labs., Albuquerque, NM (United States). Optoelectronic Design Dept.

1994-09-01T23:59:59.000Z

189

Distributed sensor system for fault detection and isolation in multistage manufacturing systems  

Science Conference Proceedings (OSTI)

With rapid innovations in sensing technology and the rising complexity in manufacturing processes, increasingly less expensive and smart devices with multiple heterogeneous on-board sensors, networked through wired or wireless links and deployable ... Keywords: DSS, MMS, data management, decision making, distributed control, distributed sensor systems, fault detection, fault isolation, industrial automation, information processing, multistage manufacturing systems, optimal design, sensor networks

Du Shi-Chang; Xi Li-Feng; Shi Jian-Jun

2006-03-01T23:59:59.000Z

190

System and method for detection of dispersed broadband signals  

DOE Patents (OSTI)

A system and method for detecting the presence of dispersed broadband signals in real time are disclosed. The present invention utilizes a bank of matched filters for detecting the received dispersed broadband signals. Each matched filter uses a respective robust time template that has been designed to approximate the dispersed broadband signals of interest, and each time template varies across a spectrum of possible dispersed broadband signal time templates. The received dispersed broadband signal x(t) is received by each of the matched filters, and if one or more matches occurs, then the received data is determined to have signal data of interest. This signal data can then be analyzed and/or transmitted to Earth for analysis, as desired. The system and method of the present invention will prove extremely useful in many fields, including satellite communications, plasma physics, and interstellar research. The varying time templates used in the bank of matched filters are determined as follows. The robust time domain template is assumed to take the form w(t)=A(t)cos[l brace]2[phi](t)[r brace]. Since the instantaneous frequency f(t) is known to be equal to the derivative of the phase [phi](t), the trajectory of a joint time-frequency representation of x(t) is used as an approximation of [phi][prime](t). 10 figs.

Qian, S.; Dunham, M.E.

1999-06-08T23:59:59.000Z

191

Errors in Radio Acoustic Sounding of Temperature  

Science Conference Proceedings (OSTI)

With the use of simultaneous correction for radial wind, the accuracy of radio acoustic sounding systems for the measurement of temperature has been substantially improved. The temperature accuracy can now be affected by a number of factors that ...

Wayne M. Angevine; W. L. Ecklund

1994-06-01T23:59:59.000Z

192

Proceedings of the 11th European Conference on Underwater Acoustics ACHIEVABLE RATES OF UNDERWATER ACOUSTIC OFDM  

E-Print Network (OSTI)

Proceedings of the 11th European Conference on Underwater Acoustics ACHIEVABLE RATES OF UNDERWATER-Telecom, Telecom Bretagne, UMR CNRS 6285 Lab-STICC, Ueb, Brest, France J.-M. Passerieux Thales Underwater Systems maintaining acceptable data rates, remains one of the major difficulty faced by underwater acoustic

Paris-Sud XI, Université de

193

ROBOTIC SYSTEMS for DEPLOYING SENSORS to DETECT CONTRABAND in CARGO  

E-Print Network (OSTI)

in this respect from sniffing explosives on the persons of terrorists passing through airports: explosives solvent detection, quadrupole mass spectrometry chemical taggant detection tandem/hybrid techniques

Siegel, Mel

194

ROBOTIC SYSTEMS for DEPLOYING SENSORS to DETECT CONTRABAND in CARGO  

E-Print Network (OSTI)

in this respect from sniffing explosives on the persons of terrorists passing through airports: explosives detection, quadrupole mass spectrometry chemical taggant detection tandem/hybrid techniques biosensors eddy

Siegel, Mel

195

Strategies for Detecting Hidden Geothermal Systems by Near-Surface Gas Monitoring  

E-Print Network (OSTI)

Propulsion Laboratory, National Rev. 1.2 Strategies for Detection of Hidden Geothermal Systems Aeronautics and Space

Lewicki, Jennifer L.; Oldenburg, Curtis M.

2004-01-01T23:59:59.000Z

196

Spreader-Bar Radiation Detection System Enhancements: A Modeling and Simulation Study  

SciTech Connect

This report provides the modeling and simulation results of the investigation of enhanced spreader bar radiation detection systems.

Ely, James H.; Ashbaker, Eric D.; Batdorf, Michael T.; Baciak, James E.; Hensley, Walter K.; Jarman, Kenneth D.; Robinson, Sean M.; Sandness, Gerald A.; Schweppe, John E.

2012-11-13T23:59:59.000Z

197

A Multi-Layer Phoswich Radioxenon Detection System  

SciTech Connect

Laboratory radioactive sources were used to characterize the phoswich detector. The CaF{sub 2} scintillator has a low light-yield and slow decay time, thus produces very small signals due to low-energy gamma rays or X-rays. Therefore, detection of 30 keV X-rays (from the xenon radioisotopes) using this layer and discriminating its very small signals from electronic noise was a challenging task. Several solutions were considered and experimentally evaluated. We found that the best solution would be extending the fast triangular filter from 10 taps to 30 taps. This will extend the peaking time of this filter from 25 nsec to 75 nsec. The digital filter is implemented in FPGA on our DPP2.0 and is used to trigger the detection system. Functionality of the new filter in capturing and discriminating 30 keV X-rays was confirmed by using a {sup 133}Ba gamma-ray source. Development of the DPP GUI software has continued with the addition of two new panels to display histograms of beta/gamma and beta/x-ray coincidence events. This includes coincidence events from a single channel, as well as two-channel, coincidence event. A pileup rejection algorithm has been implemented in the FPGA code, and controls to adjust its sensitivity have been added to the GUI. Work has begun on a new prototype system to develop a USB host interface between the PC and the FPGA to end reliance on Opal Kelly prototyping boards; the hardware for this system has been completely assembled, and the PC-side software is currently in development.

David M. Hamby

2008-07-14T23:59:59.000Z

198

Comparative Performance of Acoustic-tagged and PIT-tagged Juvenile Salmonids  

Science Conference Proceedings (OSTI)

Numerous research tools and technologies are currently being used to evaluate fish passage and survival to determine the impacts of the Federal Columbia River Power System (FCRPS) on endangered and threatened juvenile salmonids, including PIT tags, balloon tags, hydroacoustic evaluations, radio telemetry, and acoustic telemetry. Each has advantages and disadvantages, but options are restricted in some situations because of limited capabilities of a specific technology, lack of detection capability downstream, or availability of adequate numbers of fish. However, there remains concern about the comparative effects of the tag or the tagging procedure on fish performance. The recently developed Juvenile Salmonid Acoustic Telemetry System (JSATS) acoustic transmitter is the smallest active acoustic tag currently available. The goal of this study was to determine whether fish tagged with the JSATS acoustic-telemetry tag can provide unbiased estimates of passage behavior and survival within the performance life of the tag. We conducted both field and laboratory studies to assess tag effects. For the field evaluation we released a total of 996 acoustic-tagged fish in conjunction with 21,026 PIT-tagged fish into the tailrace of Lower Granite Dam on 6 and 13 May. Travel times between release and downstream dams were not significantly different for the majority of the reaches between acoustic-tagged and PIT-tagged fish. In addition to the field evaluation, a series of laboratory experiments were conducted to determine if growth and survival of juvenile Chinook salmon surgically implanted with acoustic transmitters is different than untagged or PIT tagged juvenile Chinook salmon. Only yearling fish with integrated and non-integrated transmitters experienced mortalities, and these were low (tag treatments ranged up to 7.7% while integrated and non-integrated treatments had slightly higher rates (up to 8.3% and 7.9% respectively). No acoustic transmitters were shed by yearling fish during the course of the 90 day study. Up to 7.8% of subyearling fish expelled transmitters. Tags were expelled from 5 to 63 days post-surgery. The average time to expulsion was 27 days; few fish expelled transmitters within 14 days of implantation or less. Histological results suggest that inflammation associated with implantation of an acoustic transmitter can produce fibrous tissue which can invade and possibly damage internal organs soon after implantation. Reactions severe enough to damage organs however, were limited to only ~20% of subyearling Chinook salmon, all of which were under 101mm and 12g at tagging. The infiltration of the fibrous tissue into organs was observed most often in fish held for 21 days and appeared to decrease in subsequent holding times.

Hockersmith, Eric E.; Brown, Richard S.; Liedtke, Theresa L.

2008-02-01T23:59:59.000Z

199

Comparative Performance of Acoustic-tagged and PIT-tagged Juvenile Salmonids  

DOE Green Energy (OSTI)

Numerous research tools and technologies are currently being used to evaluate fish passage and survival to determine the impacts of the Federal Columbia River Power System (FCRPS) on endangered and threatened juvenile salmonids, including PIT tags, balloon tags, hydroacoustic evaluations, radio telemetry, and acoustic telemetry. Each has advantages and disadvantages, but options are restricted in some situations because of limited capabilities of a specific technology, lack of detection capability downstream, or availability of adequate numbers of fish. However, there remains concern about the comparative effects of the tag or the tagging procedure on fish performance. The recently developed Juvenile Salmonid Acoustic Telemetry System (JSATS) acoustic transmitter is the smallest active acoustic tag currently available. The goal of this study was to determine whether fish tagged with the JSATS acoustic-telemetry tag can provide unbiased estimates of passage behavior and survival within the performance life of the tag. We conducted both field and laboratory studies to assess tag effects. For the field evaluation we released a total of 996 acoustic-tagged fish in conjunction with 21,026 PIT-tagged fish into the tailrace of Lower Granite Dam on 6 and 13 May. Travel times between release and downstream dams were not significantly different for the majority of the reaches between acoustic-tagged and PIT-tagged fish. In addition to the field evaluation, a series of laboratory experiments were conducted to determine if growth and survival of juvenile Chinook salmon surgically implanted with acoustic transmitters is different than untagged or PIT tagged juvenile Chinook salmon. Only yearling fish with integrated and non-integrated transmitters experienced mortalities, and these were low (<4.5%). Mortality among sub-yearling control and PIT-tag treatments ranged up to 7.7% while integrated and non-integrated treatments had slightly higher rates (up to 8.3% and 7.9% respectively). No acoustic transmitters were shed by yearling fish during the course of the 90 day study. Up to 7.8% of subyearling fish expelled transmitters. Tags were expelled from 5 to 63 days post-surgery. The average time to expulsion was 27 days; few fish expelled transmitters within 14 days of implantation or less. Histological results suggest that inflammation associated with implantation of an acoustic transmitter can produce fibrous tissue which can invade and possibly damage internal organs soon after implantation. Reactions severe enough to damage organs however, were limited to only ~20% of subyearling Chinook salmon, all of which were under 101mm and 12g at tagging. The infiltration of the fibrous tissue into organs was observed most often in fish held for 21 days and appeared to decrease in subsequent holding times.

Hockersmith, Eric E.; Brown, Richard S.; Liedtke, Theresa L.

2008-02-01T23:59:59.000Z

200

DimaSense™: A Novel Nucleic Acid Detection System  

SciTech Connect

Recently, we developed a suite of methods for the rational design and fabrication of well-defined nanoparticle architectures, including clusters using bio-encoded nanoscale building blocks and layer-by-layer stepwise assembly on a solid support. In particular, the Nano-Assembly platform using Encoded Solid Supports (NAESS) allows for controlled interactions, purification of side products, modularity of design, and the construction of complex nanoparticle architectures. This approach offers several advantages over the current art of designing nanoparticle clusters, which include the high-yield synthesis of desired architectures, a 'plug-and-play' design allowing for the introduction of a variety of sensing modalities, and ease of scalability in high-throughput and synthesis yield. As a utility proof of concept, we implemented our unique cluster fabrication platform to design gold nanoparticle dimers which are linked via a single-stranded DNA oligonucleotide recognition motif. The design of this motif is such that binding of complementary nucleic acids results in specific, selective and rapid dimer dissociation, which can be monitored by dynamic light scattering (DLS). We demonstrated single level mismatch selectivity using this approach. The limit of detection was determined to be 1011 molecules of synthetic target RNA or DNA within 30 minutes of incubation at 33 C. This detection limit is determined by the dimer's concentration which can be probed by currently used standard DLS instruments. We also demonstrated a specific detection of target RNA in a solution containing competing 1,000-fold excess of non-complementary DNA fragments, 10% BSA, and endonucleases. Molecular diagnostic companies, RNA-based technology developers, and personalized medicine companies have applications that could benefit from using DimaSense{trademark}. The technology represents a platform which enables the simple and reasonably inexpensive design and fabrication of highly selective genetic sensors. These sensors operate with very low concentrations of target, can utilize standard instrumentation, produce detection results rapidly, and are robust enough to function in the presence of many competing genetic targets. Many current genetic target detection products/approaches/technologies rely upon methods (such as qPCR) which are more complicated, cumbersome, and costly to perform, and are not well suited to point-of-care diagnostic applications. Several clinical diagnostic applications, particularly point-of-care (POC) diagnostics for infectious diseases, are possible and appear to be a good fit for the technology. In addition, the advent of personalized medicine will create opportunities for molecular diagnostic companies with the capabilities of rapidly and quantitatively detecting nucleic acid sequences. The global POC market was {approx}$7.7B in 2010, with a recent annual growth rate of {approx}7%. A specific disease or disease-class diagnostic would need to be identified before a more meaningful sub-market value could be stated. Additional validation of the technology to show that it displays appropriate performance parameters for a commercial application on 'real world' samples is required for true commercial readiness. In addition, optimization of sensor design parameters, to effect a 10-fold increase in sensitivity, may be required to produce a commercially ready sensor system. These validation and sensor design optimization are estimated to require 3-4 months and {approx}$75k. For an unregulated product to give this sensor system a distinct competitive advantage, 2-3 years of product development and $1.5-3M are likely required. For regulated markets, time to market (through clinic) and cost would depend upon the product.

Stadler, A.

2011-05-18T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

'Known Secure Sensor Measurements' for Critical Infrastructure Systems: Detecting Falsification of System State  

Science Conference Proceedings (OSTI)

This paper describes a first investigation on a low cost and low false alarm, reliable mechanism for detecting manipulation of critical physical processes and falsification of system state. We call this novel mechanism Known Secure Sensor Measurements (KSSM). The method moves beyond analysis of network traffic and host based state information, in fact it uses physical measurements of the process being controlled to detect falsification of state. KSSM is intended to be incorporated into the design of new, resilient, cost effective critical infrastructure control systems. It can also be included in incremental upgrades of already in- stalled systems for enhanced resilience. KSSM is based on known secure physical measurements for assessing the likelihood of an attack and will demonstrate a practical approach to creating, transmitting, and using the known secure measurements for detection.

Miles McQueen; Annarita Giani

2011-09-01T23:59:59.000Z

202

Low cost fault detection system for railcars and tracks  

E-Print Network (OSTI)

A "low cost fault detection system" that identifies wheel flats and defective tracks is explored here. This is achieved with the conjunction of sensors, microcontrollers and Radio Frequency (RF) transceivers. The objective of the proposed research is to identify faults plaguing railcars and to be able to clearly distinguish the faults of a railcar from the inherent faults in the track. The focus of the research though, is mainly to identify wheel flats and defective tracks. The thesis has been written with the premise that the results from the simulation software GENSYS are close to the real time data that would have been obtained from an actual railcar. Based on the results of GENSYS, a suitable algorithm is written that helps segregate a fault in a railcar from a defect in a track. The above code is implemented using hardware including microcontrollers, accelerometers, RF transceivers and a real time monitor. An enclosure houses the system completely, so that it is ready for application in a real environment. This also involves selection of suitable hardware so that there is a uniform source of power supply that reduces the cost and assists in building a robust system.

Vengalathur, Sriram T.

2003-08-01T23:59:59.000Z

203

On the Sounding Range of a 1-m Wavelength Radio Acoustic Sounder  

Science Conference Proceedings (OSTI)

The sounding range of a RASS (Radio Acoustic Sounding System) for remote measurement of the atmospheric thermal profile is determined both by the structural peculiarities of the system (wavelength, size of antennas, acoustic and radar power, etc.)...

G. Bonino; P. Trivero; G. Elisei; A. Marzorati

1989-10-01T23:59:59.000Z

204

Building Energy Software Tools Directory: Acoustics Program  

NLE Websites -- All DOE Office Websites (Extended Search)

Acoustics Program Acoustics Program Developed to help designers accurately model the sound level reaching building tenant's ears, the Trane Acoustics Program (TAP) "projects" equipment sound power data through the surroundings (e.g., floors, ductwork, walls), to estimate the sound level that will be heard. Industry-standard calculations published by ASHRAE's 1991 Algorithms for HVAC Acoustics handbook are the basis for this estimate. In TAP, you can model the conditions of an HVAC system by choosing specific equipment and building component criteria. TAP will analyze the sound path and calculate the total effect for the enclosed space. You can continuously adjust the data and system design criteria to compare the results effortlessly. TAP will even plot presentation quality graphs of

205

Acoustics by additive manufacturing.  

E-Print Network (OSTI)

??This study focuses on exploring the merging field of additive manufacturing and acoustics and introduces a new type of sound absorber which is regulating performance… (more)

Setaki, F.

2012-01-01T23:59:59.000Z

206

Acoustic Microscopy Applications*  

Science Conference Proceedings (OSTI)

Figure: ...Fig. 17 A portion of the 160 mm 2 (0.25 in. 2 ) area of an alumina ceramic disk scanned by an acoustic microscope

207

Technical specifications manual for the MARK-1 pulsed ionizing radiation detection system. Volume 1  

Science Conference Proceedings (OSTI)

The MARK-1 detection system was developed by the Idaho National Engineering Laboratory for the US Department of Energy Office of Arms Control and Nonproliferation. The completely portable system was designed for the detection and analysis of intense photon emissions from pulsed ionizing radiation sources. This manual presents the technical design specifications for the MARK-1 detection system and was written primarily to assist the support or service technician in the service, calibration, and repair of the system. The manual presents the general detection system theory, the MARK-1 component design specifications, the acquisition and control software, the data processing sequence, and the system calibration procedure. A second manual entitled: Volume 2: Operations Manual for the MARK-1 Pulsed Ionizing Radiation Detection System (USDOE Report WINCO-1108, September 1992) provides a general operational description of the MARK-1 detection system. The Operations Manual was written primarily to assist the field operator in system operations and analysis of the data.

Lawrence, R.S.; Harker, Y.D.; Jones, J.L.; Hoggan, J.M.

1993-03-01T23:59:59.000Z

208

Nuisance Source Population Modeling for Radiation Detection System Analysis  

SciTech Connect

A major challenge facing the prospective deployment of radiation detection systems for homeland security applications is the discrimination of radiological or nuclear 'threat sources' from radioactive, but benign, 'nuisance sources'. Common examples of such nuisance sources include naturally occurring radioactive material (NORM), medical patients who have received radioactive drugs for either diagnostics or treatment, and industrial sources. A sensitive detector that cannot distinguish between 'threat' and 'benign' classes will generate false positives which, if sufficiently frequent, will preclude it from being operationally deployed. In this report, we describe a first-principles physics-based modeling approach that is used to approximate the physical properties and corresponding gamma ray spectral signatures of real nuisance sources. Specific models are proposed for the three nuisance source classes - NORM, medical and industrial. The models can be validated against measured data - that is, energy spectra generated with the model can be compared to actual nuisance source data. We show by example how this is done for NORM and medical sources, using data sets obtained from spectroscopic detector deployments for cargo container screening and urban area traffic screening, respectively. In addition to capturing the range of radioactive signatures of individual nuisance sources, a nuisance source population model must generate sources with a frequency of occurrence consistent with that found in actual movement of goods and people. Measured radiation detection data can indicate these frequencies, but, at present, such data are available only for a very limited set of locations and time periods. In this report, we make more general estimates of frequencies for NORM and medical sources using a range of data sources such as shipping manifests and medical treatment statistics. We also identify potential data sources for industrial source frequencies, but leave the task of estimating these frequencies for future work. Modeling of nuisance source populations is only useful if it helps in understanding detector system performance in real operational environments. Examples of previous studies in which nuisance source models played a key role are briefly discussed. These include screening of in-bound urban traffic and monitoring of shipping containers in transit to U.S. ports.

Sokkappa, P; Lange, D; Nelson, K; Wheeler, R

2009-10-05T23:59:59.000Z

209

Quantum entanglement for acoustic spintronics  

SciTech Connect

We consider the entanglement of spins for two electrons contributing to the acoustoelectric current driven by a surface acoustic wave (SAW) in two adjacent narrow channels by calculating their exchange energy (J). The channels belong to an acoustic nanocircuit which comprises a network of quasi-one-dimensional pinched-off channels serving as wires along which SAW quantum dots transport electrons. This is motivated by possible practical applications involving quantum information processing and quantum computers. We calculate J as a function of time as the electrons travel side-by-side in the adjacent channels and as a function of the distance between the centers of the channels. The leakage from the state in which the system is prepared, is calculated. The oscillations in the leakage indicate the probability for the electron system to make transitions between the ground and excited states, or for an electron to hop back and forth between channels.

Gumbs, Godfrey; Abranyos, Yonatan [Department of Physics and Astronomy, Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10021 (United States)

2004-11-01T23:59:59.000Z

210

6+ years of acoustic thermometry in the North Pacific Ocean: A cycle of the Pacific decadal oscillation  

Science Conference Proceedings (OSTI)

Acoust. measurements of basin?averaged temperatures have been made in the North Pacific over the last 8 years. The acoustic observations give integral measurements of ocean temperature with the averaging needed to detect weak

2004-01-01T23:59:59.000Z

211

Solid Rocket Motor Acoustic Testing  

DOE Green Energy (OSTI)

Acoustic data are often required for the determination of launch and powered flight loads for rocket systems and payloads. Such data are usually acquired during test firings of the solid rocket motors. In the current work, these data were obtained for two tests at a remote test facility where we were visitors. This paper describes the data acquisition and the requirements for working at a remote site, interfacing with the test hosts.

Rogers, J.D.

1999-03-31T23:59:59.000Z

212

Passive Acoustic Determination of Wave-Breaking Events and Their Severity across the Spectrum  

Science Conference Proceedings (OSTI)

A passive acoustic method of detecting breaking waves of different scales has been developed. The method also showed promise for measuring breaking severity.

Richard Manasseh; Alexander V. Babanin; Cameron Forbes; Kate Rickards; Irena Bobevski; Andrew Ooi

2006-04-01T23:59:59.000Z

213

A Theoretical Structural Impairment Detection System for Timber Railway Bridges  

E-Print Network (OSTI)

The objective of this research is to develop a theoretical Structural Impairment Detection System (SIDS) for timber railway bridges. Due to fatigue, the timber stringers in timber railway bridges develop shear cracks. These shear cracks lead to higher bridge deflections, higher stresses in the stringers and rail, and shorter fatigue life of the system. A SIDS is proposed which links wheel path accelerations obtained from traversing freight cars to the condition of the bridge. In order to develop the SIDS, two models of timber railway bridges with various levels of structural impairment were developed. The first model was a quasi-static model developed from classical beam theory and implemented in MATLAB. The second model was a dynamic, finite element model created in LS-DYNA. Traversing axle loads were imposed on the models. The results obtained from the model were the wheel paths the axles take as they traverse the bridge. The paths were expressed as vertical displacements as a function of position on the bridge. Wheel path accelerations were obtained by numerically differentiating the vertical displacements. The accelerations were then used to train neural networks to have an input of an acceleration vector and an output of a bridge condition vector. The neural networks were trained on results from both models under three train speeds: 40 mph, 30 mph, and 20 mph. The networks were able to determine the correct bridge condition 90% of the time when the train speed was 40 mph and 70% of the time when the train speed was 30 mph. The networks were not successful in determining bridge condition when the train speed was 20 mph.

Orsak, John

2012-05-01T23:59:59.000Z

214

Detecting illicit leakage of information in operating systems  

Science Conference Proceedings (OSTI)

Keywords: analysis, audit collection, data transmission, information flow, multi-level secure systems, operating system security

Shiuh-Pyng Shieh; Virgil D. Gligor

1996-01-01T23:59:59.000Z

215

Strategies For Detecting Hidden Geothermal Systems By Near-Surface...  

Open Energy Info (EERE)

stress resulting from elevated CO2 concentrations, and (5) light detection and ranging (LIDAR) that can measure CO2 concentrations over an integrated path. Technologies currently...

216

Thermal Acoustic Sensor for High Pulse Energy X-ray FEL Beams  

SciTech Connect

The pulse energy density of X-ray FELs will saturate or destroy conventional X-ray diagnostics, and the use of large beam attenuation will result in a beam that is dominated by harmonics. We present preliminary results at the LCLS from a pulse energy detector based on the thermal acoustic effect. In this type of detector an X-ray resistant material (boron carbide in this system) intercepts the beam. The pulse heating of the target material produces an acoustic pulse that can be detected with high frequency microphones to produce a signal that is linear in the absorbed energy. The thermal acoustic detector is designed to provide first- and second-order calorimetric measurement of X-ray FEL pulse energy. The first-order calorimetry is a direct temperature measurement of a target designed to absorb all or most of the FEL pulse power with minimal heat leak. The second-order measurement detects the vibration caused by the rapid thermoelastic expansion of the target material each time it absorbs a photon pulse. Both the temperature change and the amplitude of the acoustic signal are directly related to the photon pulse energy.

Smith, T.J.; Frisch, J.C.; Kraft, E.M.; Loos, J.; /SLAC; Bentsen, G.S.; /Rochester U.

2011-12-13T23:59:59.000Z

217

Time-based intrusion detection in cyber-physical systems  

Science Conference Proceedings (OSTI)

Embedded systems, particularly real-time systems with temporal constraints, are increasingly deployed in every day life. Such systems that interact with the physical world are also referred to as cyber-physical systems (CPS). These systems commonly find ... Keywords: cyber-physical systems, real-time systems, security, timing analysis

Christopher Zimmer; Balasubramanya Bhat; Frank Mueller; Sibin Mohan

2010-04-01T23:59:59.000Z

218

Nanotechnology-Based Systems for Nuclear Radiation and Chemicl Detection  

SciTech Connect

This main objectives of this effort are the development and prototyping of a small. sensitive, and low-cost multi-channel nanoparticle scintillation microdevice with integrated waveguides for alpha, beta, gamma, and neutron detection. This research effort has integrated experiments and simulation to determine the combination of process-specific materials for the achievement optimum detection conditions.

Kody Varahramyan; Pedro Derosa; Chester Wilson

2006-10-11T23:59:59.000Z

219

Fault Detection and Diagnosis in Building HVAC Systems  

E-Print Network (OSTI)

in AHU of VAV system”, Energy Conversion & Management, 30.energy efficient building management system”, Energy Conversionenergy efficient building management system”, Energy Conversion

Najafi, Massieh

2010-01-01T23:59:59.000Z

220

Recurrent neuro-fuzzy system for fault detection and isolation in nuclear reactors  

Science Conference Proceedings (OSTI)

This paper presents an application of recurrent neuro-fuzzy systems to fault detection and isolation in nuclear reactors. A general framework is adopted, in which a fuzzification module is linked to an inference module that is actually a neural network ... Keywords: Diagnostic system, Fault detection and isolation, Human-machine integration, Neuro-fuzzy systems, Nuclear power plants, Recurrent neural networks

Alexandre Evsukoff; Sylviane Gentil

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

State-based network intrusion detection systems for SCADA protocols: a proof of concept  

Science Conference Proceedings (OSTI)

We present a novel Intrusion Detection System able to detect complex attacks to SCADA systems. By complex attack, we mean a set of commands (carried in Modbus packets) that, while licit when considered in isolation on a single-packet basis, interfere ... Keywords: IDS, SCADA systems, critical infrastructures, security

Andrea Carcano; Igor Nai Fovino; Marcelo Masera; Alberto Trombetta

2009-09-01T23:59:59.000Z

222

Review: The use of computational intelligence in intrusion detection systems: A review  

Science Conference Proceedings (OSTI)

Intrusion detection based upon computational intelligence is currently attracting considerable interest from the research community. Characteristics of computational intelligence (CI) systems, such as adaptation, fault tolerance, high computational speed ... Keywords: Artificial immune systems, Artificial neural networks, Computational intelligence, Evolutionary computation, Fuzzy systems, Intrusion detection, Soft computing, Survey, Swarm intelligence

Shelly Xiaonan Wu; Wolfgang Banzhaf

2010-01-01T23:59:59.000Z

223

A CONTROLLER FOR HVAC SYSTEMS WITH FAULT DETECTION CAPABILITIES BASED ON SIMULATION MODELS  

E-Print Network (OSTI)

1 A CONTROLLER FOR HVAC SYSTEMS WITH FAULT DETECTION CAPABILITIES BASED ON SIMULATION MODELS T. I describes a control scheme with fault detection capabilities suitable for application to HVAC systems as a reference of correct operation. Faults that occur in the HVAC system under control cause the PI

224

DADICC: Intelligent system for anomaly detection in a combined cycle gas turbine plant  

Science Conference Proceedings (OSTI)

DADICC is the abbreviated name for an intelligent system able to detect on-line and diagnose anomalies as soon as possible in the dynamic evolution of the behaviour of a power plant based on a combined cycle gas turbine. In order to reach this objective, ... Keywords: Anomaly detection, Diagnosis, Expert system, Multi-agent system, Neural network, Normal behaviour

Antonio Arranz; Alberto Cruz; Miguel A. Sanz-Bobi; Pablo Ruíz; Josué Coutiño

2008-05-01T23:59:59.000Z

225

Automatic expert system based on images for accuracy crop row detection in maize fields  

Science Conference Proceedings (OSTI)

This paper proposes an automatic expert system for accuracy crop row detection in maize fields based on images acquired from a vision system. Different applications in maize, particularly those based on site specific treatments, require the identification ... Keywords: Crop row detection in maize fields, Expert system, Image segmentation, Image thresholding, Linear regression, Machine vision, Theil-Sen estimator

J. M. Guerrero; M. Guijarro; M. Montalvo; J. Romeo; L. Emmi; A. Ribeiro; G. Pajares

2013-02-01T23:59:59.000Z

226

Laboratory Comparisons of Acoustic and Optical Sensors for Microbubble Measurement  

Science Conference Proceedings (OSTI)

This paper presents the results of a recent comparison between three microbubble size spectrum measurement systems. These systems are the light-wattering bubble counter, the photographic bubble-imaging system, and the acoustic resonator array. ...

Ming Vang Su; Douglas Todoroff; John Cartmill

1994-02-01T23:59:59.000Z

227

Acoustic cooling engine  

DOE Patents (OSTI)

An acoustic cooling engine with improved thermal performance and reduced internal losses comprises a compressible fluid contained in a resonant pressure vessel. The fluid has a substantial thermal expansion coefficient and is capable of supporting an acoustic standing wave. A thermodynamic element has first and second ends and is located in the resonant pressure vessel in thermal communication with the fluid. The thermal response of the thermodynamic element to the acoustic standing wave pumps heat from the second end to the first end. The thermodynamic element permits substantial flow of the fluid through the thermodynamic element. An acoustic driver cyclically drives the fluid with an acoustic standing wave. The driver is at a location of maximum acoustic impedance in the resonant pressure vessel and proximate the first end of the thermodynamic element. A hot heat exchanger is adjacent to and in thermal communication with the first end of the thermodynamic element. The hot heat exchanger conducts heat from the first end to portions of the resonant pressure vessel proximate the hot heat exchanger. The hot heat exchanger permits substantial flow of the fluid through the hot heat exchanger. The resonant pressure vessel can include a housing less than one quarter wavelength in length coupled to a reservoir. The housing can include a reduced diameter portion communicating with the reservoir. The frequency of the acoustic driver can be continuously controlled so as to maintain resonance.

Hofler, Thomas J. (Los Alamos, NM); Wheatley, John C. (Los Alamos, NM); Swift, Gregory W. (Santa Fe, NM); Migliori, Albert (Santa Fe, NM)

1988-01-01T23:59:59.000Z

228

Advanced X-ray Systems for the Detection of Special Nuclear ...  

Science Conference Proceedings (OSTI)

... The Dosimetry Group provides support to the Domestic Nuclear Detection Office ... radiation dosimetry in and around these high-energy systems. ...

2013-03-13T23:59:59.000Z

229

Fault detection of fault ride through for doubly-fed induction generator based wind energy systems.  

E-Print Network (OSTI)

??Fault detection and mitigation is of high importance for existing DFIG based wind energy conversion systems. Keeping the doubly-fed induction generator (DFIG) online during faults… (more)

Ramroop, Shoba AD

2008-01-01T23:59:59.000Z

230

Distributed Intrusion Detection System in A Multi-Layer Network Architecture of Smart Grids.  

E-Print Network (OSTI)

??This thesis proposes a Distributed Intrusion Detection System for Smart Grids by developing and deploying intelligent modules in multiple layers of the smart grid in… (more)

Zhang, Yichi

2011-01-01T23:59:59.000Z

231

Lightning Direction-Finding Systems for Forest Fire Detection  

Science Conference Proceedings (OSTI)

Extensive networks of magnetic direction-finding (DF) stations have been installed throughout the western United States and Alaska to facilitate early detection of lightning-caused fires. Each station contains a new wideband direction-finder that ...

E. P. Krider; R. C. Noggle; A. E. Pifer; D. L. Vance

1980-09-01T23:59:59.000Z

232

Strategies For Detecting Hidden Geothermal Systems By Near-Surface Gas  

Open Energy Info (EERE)

Strategies For Detecting Hidden Geothermal Systems By Near-Surface Gas Strategies For Detecting Hidden Geothermal Systems By Near-Surface Gas Monitoring Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Strategies For Detecting Hidden Geothermal Systems By Near-Surface Gas Monitoring Details Activities (6) Areas (1) Regions (0) Abstract: Hidden geothermal systems are those systems above which hydrothermal surface features (e.g., hot springs, fumaroles, elevated ground temperatures, hydrothermal alteration) are lacking. Emissions of moderate to low solubility gases (e.g., CO2, CH4, He) may be one of the primary near-surface signals from these systems. Detection of anomalous gas emissions related to hidden geothermal systems may therefore be an important tool to discover new geothermal resources. This study investigates the potential for CO2 detection and monitoring in the

233

Acoustical heat pumping engine  

DOE Patents (OSTI)

The disclosure is directed to an acoustical heat pumping engine without moving seals. A tubular housing holds a compressible fluid capable of supporting an acoustical standing wave. An acoustical driver is disposed at one end of the housing and the other end is capped. A second thermodynamic medium is disposed in the housing near to but spaced from the capped end. Heat is pumped along the second thermodynamic medium toward the capped end as a consequence both of the pressure oscillation due to the driver and imperfect thermal contact between the fluid and the second thermodynamic medium. 2 figs.

Wheatley, J.C.; Swift, G.W.; Migliori, A.

1983-08-16T23:59:59.000Z

234

Acoustical heat pumping engine  

DOE Patents (OSTI)

The disclosure is directed to an acoustical heat pumping engine without moving seals. A tubular housing holds a compressible fluid capable of supporting an acoustical standing wave. An acoustical driver is disposed at one end of the housing and the other end is capped. A second thermodynamic medium is disposed in the housing near to but spaced from the capped end. Heat is pumped along the second thermodynamic medium toward the capped end as a consequence both of the pressure oscillation due to the driver and imperfect thermal contact between the fluid and the second thermodynamic medium.

Wheatley, John C. (Los Alamos, NM); Swift, Gregory W. (Los Alamos, NM); Migliori, Albert (Santa Fe, NM)

1983-08-16T23:59:59.000Z

235

Acoustic well cleaner  

DOE Patents (OSTI)

A method and apparatus are disclosed for cleaning the wellbore and the near wellbore region. A sonde is provided which is adapted to be lowered into a borehole and which includes a plurality of acoustic transducers arranged around the sonde. Electrical power provided by a cable is converted to acoustic energy. The high intensity acoustic energy directed to the borehole wall and into the near wellbore region, redissolves or resuspends the material which is reducing the permeability of the formation and/or restricting flow in the wellbore.

Maki, Jr., Voldi E. (11904 Bell Ave., Austin, TX 78759-2415); Sharma, Mukul M. (Dept. of Petroleum Engr. Univ. of Texas, Austin, TX 78712)

1997-01-21T23:59:59.000Z

236

Alert correlation in collaborative intelligent intrusion detection systems-A survey  

Science Conference Proceedings (OSTI)

As complete prevention of computer attacks is not possible, intrusion detection systems (IDSs) play a very important role in minimizing the damage caused by different computer attacks. There are two intrusion detection methods: namely misuse- and anomaly-based. ... Keywords: Alert correlation, Collaborative intrusion detection, Computational intelligence approaches, False positive analysis

Huwaida Tagelsir Elshoush; Izzeldin Mohamed Osman

2011-10-01T23:59:59.000Z

237

Networked Acoustic Modems for Real-Time Data Delivery from Distributed Subsurface Instruments in the Coastal Ocean: Initial System Development and Performance  

Science Conference Proceedings (OSTI)

Results are reported from field tests of networked acoustic modems used for wireless real-time delivery of oceanographic measurements from a distributed array of subsurface instruments in coastal waters. The network demonstrated consists of ...

Daniel L. Codiga; Joseph A. Rice; Paul A. Baxley

2004-02-01T23:59:59.000Z

238

Space, time and acoustics  

E-Print Network (OSTI)

This thesis describes the development of new concepts in acoustical analysis from their inception to implementation as a computer design tool. Research is focused on a computer program which aids the designer to visually ...

Thompson, Philip R. Z. (Philip Reed Zane)

1988-01-01T23:59:59.000Z

239

Atmospheric Acoustic Minisounder  

Science Conference Proceedings (OSTI)

An improved version of a monostatic acoustic minisounder for the investigation of the structure and dynamics of the lower boundary layer, operating at high frequencies and equipped with a specially designed micro-antenna and advanced electronic ...

D. N. Asimakopoulos; C. G. Helmis; G. J. Stephanou

1987-06-01T23:59:59.000Z

240

Spacetime transformation acoustics  

E-Print Network (OSTI)

A recently proposed analogue transformation method has allowed the extension of transformation acoustics to general spacetime transformations. We analyze here in detail the differences between this new analogue transformation acoustics (ATA) method and the standard one (STA). We show explicitly that STA is not suitable for transformations that mix space and time. ATA takes as starting point the acoustic equation for the velocity potential, instead of that for the pressure as in STA. This velocity-potential equation by itself already allows for some transformations mixing space and time, but not all of them. We explicitly obtain the entire set of transformations that do not leave its form invariant. It is in these cases that ATA shows its true potential, allowing for building a transformation acoustics method that enables the full range of spacetime transformations. We provide an example of an important transformation which cannot be achieved with STA. Using this transformation, we design and simulate an acous...

García-Meca, C; Barceló, C; Jannes, G; Sánchez-Dehesa, J; Martínez, A

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Automatic acoustic guitar tuner  

E-Print Network (OSTI)

Acoustic guitar musicians tune their instruments by using a conventional tuner. Individuals pluck the string and the conventional tuner indicates whether the note is sharp or flat. The musician then has to wind the string ...

Bocanegra, Alfredo

2005-01-01T23:59:59.000Z

242

Keyboard acoustic emanations revisited  

Science Conference Proceedings (OSTI)

We examine the problem of keyboard acoustic emanations. We present a novel attack taking as input a 10-minute sound recording of a user typing English text using a keyboard, and then recovering up to 96% of typed characters. There is no need for a labeled ... Keywords: HMM, acoustic emanations, cepstrum, computer security, electronic eavesdropping, hidden Markov models, human factors, keyboards, learning theory, privacy, signal analysis

Li Zhuang; Feng Zhou; J. D. Tygar

2005-11-01T23:59:59.000Z

243

Keyboard acoustic emanations revisited  

Science Conference Proceedings (OSTI)

We examine the problem of keyboard acoustic emanations. We present a novel attack taking as input a 10-minute sound recording of a user typing English text using a keyboard and recovering up to 96% of typed characters. There is no need for training ... Keywords: Computer security, HMM, acoustic manations, cepstrum, electronic eavesdropping, hidden markov models, human factors, keyboards, learning theory, privacy, signal analysis

Li Zhuang; Feng Zhou; J. D. Tygar

2009-10-01T23:59:59.000Z

244

Anomaly detection in extremist web forums using a dynamical systems approach  

Science Conference Proceedings (OSTI)

In this paper, we present preliminary results of analyzing data from the Dark Web collection using a dynamical systems approach for unsupervised anomaly detection. The goal is to provide a robust, focus-of-attention mechanism to identify emerging threats ... Keywords: data mining, dynamical systems, finite-time Lyapunov exponents, unsupervised anomaly detection

Steve Kramer

2010-07-01T23:59:59.000Z

245

Energy Balancing Intrusion Detection System in Wireless Sensor Network  

Science Conference Proceedings (OSTI)

wireless sensor network (WSN) is vulnerable to a wide range of attacks due to deployment in the hostile ervironment and having limited resources. The security of WSN becomes a very important issue with the rapid development of WSN. Instrusion detection ... Keywords: WSN, Energy-effiency, Clustering, IDS

Chunyan Peng; Bing Liu

2012-10-01T23:59:59.000Z

246

Intelligent acoustic rotor speed estimation for an autonomous helicopter  

Science Conference Proceedings (OSTI)

Acoustic sensing to gather information about a machine can be highly beneficial, but processing the data can be difficult. In this work, a variety of methodologies have been studied to extract rotor speed information from the sound signature of an autonomous ... Keywords: Acoustic sensing, Adaptive network-based fuzzy inference system, Artificial neural network, Feature selection, Genetic algorithm, Helicopter, Rotor speeds

Benjamin N. Passow; Mario A. Gongora; Adrian A. Hopgood; Sophy Smith

2012-11-01T23:59:59.000Z

247

Fast LMS/Newton algorithms for stereophonic acoustic echo cancelation  

Science Conference Proceedings (OSTI)

This paper presents a new class of adaptive filtering algorithms to solve the stereophonic acoustic echo cancelation (AEC) problem in teleconferencing systems. While stereophonic AEC may be seen as a simple generalization of the well-known single-channel ... Keywords: LMS/Newton, adaptive filters, lattice orthogonalization, stereo acoustic echo cancellation (AEC)

Harsha I. K. Rao; Behrouz Farhang-Boroujeny

2009-08-01T23:59:59.000Z

248

Acoustical properties of drill strings  

DOE Green Energy (OSTI)

The recovery of petrochemical and geothermal resources requires extensive drilling of wells to increasingly greater depths. Real-time collection and telemetry of data about the drilling process while it occurs thousands of feet below the surface is an effective way of improving the efficiency of drilling operations. Unfortunately, due to hostile down-hole environments, telemetry of this data is an extremely difficult problem. Currently, commercial systems transmit data to the surface by producing pressure pulses within the portion of the drilling mud enclosed in the hollow steel drill string. Transmission rates are between two and four data bits per second. Any system capable of raising data rates without increasing the complexity of the drilling process will have significant economic impact. One alternative system is based upon acoustical carrier waves generated within the drill string itself. If developed, this method would accommodate data rates up to 100 bits per second. Unfortunately, the drill string is a periodic structure of pipe and threaded tool joints, the transmission characteristics are very complex and exhibit a banded and dispersive structure. Over the past forty years, attempts to field systems based upon this transmission method have resulted in little success. This paper examines this acoustical transmission problem in great detail. The basic principles of acoustic wave propagation in the periodic structure of the drill string are examined through theory, laboratory experiment, and field test. The results indicate the existence of frequency bands which are virtually free of attenuation and suitable for data transmission at high bit rates. 9 refs., 38 figs., 2 tabs.

Drumheller, D.S.

1988-08-01T23:59:59.000Z

249

Reliability testing of active SDHW components. Part III. Development of a fault detection system  

SciTech Connect

This report describes a fault detection system developed for solar domestic hot water systems that will assist the homeowner and repairman in detecting major operational faults with the system. A study by the Florida Solar Energy Center showed that most homeowners were unaware of how well their systems were operating. With this need in mind, we developed a system that will detect and display circulation failures, nighttime circulation, freeze protection failure, and overheating protection failure. Cost of the unit using retail prices for components is less than $55.00 (1985 $), excluding the sensors. Fault detection systems are necessary, since it is difficult for homeowners to know the status of their system. Our device is sufficiently developed for industry to use, although further development of some of the sensors and some cost reduction is necessary.

Farrington, R.B.

1986-01-01T23:59:59.000Z

250

System Assurance: Beyond Detecting Vulnerabilities, 1st edition  

Science Conference Proceedings (OSTI)

In this day of frequent acquisitions and perpetual application integrations, systems are often an amalgamation of multiple programming languages and runtime platforms using new and legacy content. Systems of such mixed origins are increasingly vulnerable ...

Nikolai Mansourov; Djenana Campara

2010-12-01T23:59:59.000Z

251

Attacks against process control systems: risk assessment, detection, and response  

Science Conference Proceedings (OSTI)

In the last years there has been an increasing interest in the security of process control and SCADA systems. Furthermore, recent computer attacks such as the Stuxnet worm, have shown there are parties with the motivation and resources to effectively ... Keywords: IDS, SCADA, control systems, critical infrastructure protection, cyber-physical systems, security

Alvaro A. Cárdenas; Saurabh Amin; Zong-Syun Lin; Yu-Lun Huang; Chi-Yen Huang; Shankar Sastry

2011-03-01T23:59:59.000Z

252

Direct-form adaptive equalization for underwater acoustic communication  

E-Print Network (OSTI)

Adaptive equalization is an important aspect of communication systems in various environments. It is particularly important in underwater acoustic communication systems, as the channel has a long delay spread and is subject ...

Yellepeddi, Atulya

2012-01-01T23:59:59.000Z

253

Flight Testing of an Advanced Airborne Natural Gas Leak Detection System  

SciTech Connect

ITT Industries Space Systems Division (Space Systems) has developed an airborne natural gas leak detection system designed to detect, image, quantify, and precisely locate leaks from natural gas transmission pipelines. This system is called the Airborne Natural Gas Emission Lidar (ANGEL) system. The ANGEL system uses a highly sensitive differential absorption Lidar technology to remotely detect pipeline leaks. The ANGEL System is operated from a fixed wing aircraft and includes automatic scanning, pointing system, and pilot guidance systems. During a pipeline inspection, the ANGEL system aircraft flies at an elevation of 1000 feet above the ground at speeds of between 100 and 150 mph. Under this contract with DOE/NETL, Space Systems was funded to integrate the ANGEL sensor into a test aircraft and conduct a series of flight tests over a variety of test targets including simulated natural gas pipeline leaks. Following early tests in upstate New York in the summer of 2004, the ANGEL system was deployed to Casper, Wyoming to participate in a set of DOE-sponsored field tests at the Rocky Mountain Oilfield Testing Center (RMOTC). At RMOTC the Space Systems team completed integration of the system and flew an operational system for the first time. The ANGEL system flew 2 missions/day for the duration for the 5-day test. Over the course of the week the ANGEL System detected leaks ranging from 100 to 5,000 scfh.

Dawn Lenz; Raymond T. Lines; Darryl Murdock; Jeffrey Owen; Steven Stearns; Michael Stoogenke

2005-10-01T23:59:59.000Z

254

Circuitry, systems and methods for detecting magnetic fields  

SciTech Connect

Circuitry for detecting magnetic fields includes a first magnetoresistive sensor and a second magnetoresistive sensor configured to form a gradiometer. The circuitry includes a digital signal processor and a first feedback loop coupled between the first magnetoresistive sensor and the digital signal processor. A second feedback loop which is discrete from the first feedback loop is coupled between the second magnetoresistive sensor and the digital signal processor.

Kotter, Dale K. (Shelley, ID); Spencer, David F. (Idaho Falls, ID); Roybal, Lyle G. (Idaho Falls, ID); Rohrbaugh, David T. (Idaho Falls, ID)

2010-09-14T23:59:59.000Z

255

A Comparative Analysis and Experimental Study on Wireless Aerial and Underwater Acoustic  

E-Print Network (OSTI)

A Comparative Analysis and Experimental Study on Wireless Aerial and Underwater Acoustic underwater acoustic sensor networks through the use of audio hardware built in to the sensor modules. In this paper, we explore the potential of the acoustic communication system for both aerial and underwater

Lopes, Cristina Videira

256

Systems and methods for detecting a flame in a fuel nozzle of a gas turbine  

SciTech Connect

A system may detect a flame about a fuel nozzle of a gas turbine. The gas turbine may have a compressor and a combustor. The system may include a first pressure sensor, a second pressure sensor, and a transducer. The first pressure sensor may detect a first pressure upstream of the fuel nozzle. The second pressure sensor may detect a second pressure downstream of the fuel nozzle. The transducer may be operable to detect a pressure difference between the first pressure sensor and the second pressure sensor.

Kraemer, Gilbert Otto; Storey, James Michael; Lipinski, John; Mestroni, Julio Enrique; Williamson, David Lee; Marshall, Jason Randolph; Krull, Anthony

2013-05-07T23:59:59.000Z

257

Strategies To Detect Hidden Geothermal Systems Based On Monitoring...  

Open Energy Info (EERE)

Geothermal Systems Based On Monitoring and Analysis Of CO2 In The Near-Surface Environment Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article:...

258

Fault Detection and Diagnosis in Building HVAC Systems.  

E-Print Network (OSTI)

??Building HVAC systems account for more than 30% of annual energy consumption in United States. However, it has become apparent that only in a small… (more)

Najafi, Massieh

2010-01-01T23:59:59.000Z

259

Acoustic-velocity measurements in materials using a regenerative method  

DOE Patents (OSTI)

Acoustic energy is propatated through earth material between an electro-acoustic generator and a receiver which converts the received acoustic energy into electrical signals. A closed loop is formed by a variable gain amplifier system connected between the receiver and the generator. The gain of the amplifier system is increased until sustained oscillations are produced in the closed loop. The frequency of the oscillations is measured as an indication of the acoustic propagation velocity through the earth material. The amplifier gain is measured as an indication of the acoustic attenuation through the earth materials. The method is also applicable to the non-destructive testing of structural materials, such as steel, aluminum and concrete.

Laine, E.F.

1982-09-30T23:59:59.000Z

260

Acoustic velocity measurements in materials using a regenerative method  

DOE Patents (OSTI)

Acoustic energy is propagated through earth material between an electro-acoustic generator and a receiver which converts the received acoustic energy into electrical signals. A closed loop is formed by a variable gain amplifier system connected between the receiver and the generator. The gain of the amplifier system is increased until sustained oscillations are produced in the closed loop. The frequency of the oscillations is measured as an indication of the acoustic propagation velocity through the earth material. The amplifier gain is measured as an indication of the acoustic attenuation through the earth materials. The method is also applicable to the non-destructive testing of structural materials, such as steel, aluminum and concrete.

Laine, Edwin F. (Alamo, CA)

1986-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Detection system based on a novel large area hybrid detector  

Science Conference Proceedings (OSTI)

A system level implementation of a large area hybrid detector is presented. The detector used in this system consists of an array of hydrogenated amorphous silicon photodiodes directly connected to a CMOS readout chip, which is vertically integrated ... Keywords: Amorphous silicon, Hybrid detectors, Large area photodetectors

A. Nascetti; P. Valerio; D. Caputo; G. de Cesare

2010-11-01T23:59:59.000Z

262

Human detection with a multi-sensors stereovision system  

E-Print Network (OSTI)

is a part of the Integrated Energy Systems - Productivity and Buildings Science program, a Public Interest Energy Research (PIER) program. It is funded by California ratepayers through California's System Benefit collection, the Daylight Code classification, and review of the work. Review and Advisory Committee: Dr. Jed

263

Optically Detected Magnetic Resonance Studies on ?-conjugated semiconductor systems  

Science Conference Proceedings (OSTI)

Optically Detected Magnetic Resonance (ODMR) techniques were used to investigate the dynamics of excitons and charge carriers in ?-conjugated organic semiconductors. Degradation behavior of the negative spin-1/2 electroluminescence-detected magnetic resonance (ELDMR) was observed in Alq3 devices. The increase in the resonance amplitude implies an increasing bipolaron formation during degradation, which might be the result of growth of charge traps in the device. The same behavior of the negative spin-1/2 ELDMR was observed in 2wt% Rubrene doped Tris(8-hydroxyquinolinato)aluminium (Alq3) devices. However, with increasing injection current, a positive spin-1/2 ELDMR, together with positive spin 1 triplet powder patterns at {delta}m{sub S}={+-}1 and {delta}m{sub S}={+-}2, emerges. Due to the similarities in the frequency dependences of single and double modulated ELDMR and the photoluminescence-detected magnetic resonance (PLDMR) results in poly[2-methoxy-5-(2 -ethyl-hexyloxy)-1,4-phenyl ene vinylene] (MEH-PPV) films, the mechanism for this positive spin-1/2 ELDMR was assigned to enhanced triplet-polaron quenching under resonance conditions. The ELDMR in rubrene doped Alq3 devices provides a path to investigate charge distribution in the device under operational conditions. Combining the results of several devices with different carrier blocking properties and the results from transient EL, it was concluded trions not only exist near buffer layer but also exist in the electron transport layer. This TPQ model can also be used to explain the positive spin-1/2 PLDMR in poly(3-hexylthiophene) (P3HT) films at low temperature and in MEH-PPV films at various temperatures up to room temperature. Through quantitative analysis, TE-polaron quenching (TPQ) model is shown having the ability to explain most behaviors of the positive spin-1/2 resonance. Photocurrent detected magnetic resonance (PCDMR) studies on MEH-PPV devices revealed a novel transient resonance signal. The signal may originate from the higher concentration of deep traps near cathode. A quantitative analysis based on this assumption was carried out and found to be consistent with the experimental results.

Chen, Ying

2011-12-06T23:59:59.000Z

264

Acoustic Emission and Guided Wave Monitoring of Fatigue Crack Growth on a Full Pipe Specimen  

Science Conference Proceedings (OSTI)

Continuous on-line monitoring of active and passive systems, structures and components in nuclear power plants will be critical to extending the lifetimes of nuclear power plants in the US beyond 60 years. Acoustic emission and guided ultrasonic waves are two tools for continuously monitoring passive systems, structures and components within nuclear power plants and are the focus of this study. These tools are used to monitor fatigue damage induced in a SA 312 TP304 stainless steel pipe specimen. The results of acoustic emission monitoring indicate that crack propagation signals were not directly detected. However, acoustic emission monitoring exposed crack formation prior to visual confirmation through the detection of signals caused by crack closure friction. The results of guided ultrasonic wave monitoring indicate that this technology is sensitive to the presence and size of cracks. The sensitivity and complexity of GUW signals is observed to vary with respect to signal frequency and path traveled by the guided ultrasonic wave relative to the crack orientation.

Meyer, Ryan M.; Cumblidge, Stephen E.; Ramuhalli, Pradeep; Watson, Bruce E.; Doctor, Steven R.; Bond, Leonard J.

2011-05-06T23:59:59.000Z

265

Fault Detection and Diagnosis in Building HVAC Systems  

E-Print Network (OSTI)

techniques for model-based FDD methods applied to vapordetection and diagnosis (FDD) has been an active area for6-17]. In building HVAC systems, FDD has received increasing

Najafi, Massieh

2010-01-01T23:59:59.000Z

266

HONEY: A Multimodality Fall Detection and Telecare System  

E-Print Network (OSTI)

to provide home-based telecare instead of institutionalized healthcare. Falling is one of the most common. To facilitate a reliable, safe and real-time home-based healthcare environment, we propose the HONEY system

Shi, Weisong

267

Systems and methods of detecting force and stress using tetrapod nanocrystal  

DOE Patents (OSTI)

Systems and methods of detecting force on the nanoscale including methods for detecting force using a tetrapod nanocrystal by exposing the tetrapod nanocrystal to light, which produces a luminescent response by the tetrapod nanocrystal. The method continues with detecting a difference in the luminescent response by the tetrapod nanocrystal relative to a base luminescent response that indicates a force between a first and second medium or stresses or strains experienced within a material. Such systems and methods find use with biological systems to measure forces in biological events or interactions.

Choi, Charina L.; Koski, Kristie J.; Sivasankar, Sanjeevi; Alivisatos, A. Paul

2013-08-20T23:59:59.000Z

268

Radiation detection system for portable gamma-ray spectroscopy  

DOE Patents (OSTI)

A portable gamma ray detection apparatus having a gamma ray detector encapsulated by a compact isolation structure having at least two volumetrically-nested enclosures where at least one is a thermal shield. The enclosures are suspension-mounted to each other to successively encapsulate the detector without structural penetrations through the thermal shields. A low power cooler is also provided capable of cooling the detector to cryogenic temperatures without consuming cryogens, due to the heat load reduction by the isolation structure and the reduction in the power requirements of the cooler. The apparatus also includes a lightweight portable power source for supplying power to the apparatus, including to the cooler and the processing means, and reducing the weight of the apparatus to enable handheld operation or toting on a user's person.

Rowland, Mark S. (Alamo, CA); Howard, Douglas E. (Livermore, CA); Wong, James L. (Dublin, CA); Jessup, James L. (Tracy, CA); Bianchini, Greg M. (Livermore, CA); Miller, Wayne O. (Livermore, CA)

2006-06-20T23:59:59.000Z

269

Point interactions in acoustics: one dimensional models  

E-Print Network (OSTI)

A one dimensional system made up of a compressible fluid and several mechanical oscillators, coupled to the acoustic field in the fluid, is analyzed for different settings of the oscillators array. The dynamical models are formulated in terms of singular perturbations of the decoupled dynamics of the acoustic field and the mechanical oscillators. Detailed spectral properties of the generators of the dynamics are given for each model we consider. In the case of a periodic array of mechanical oscillators it is shown that the energy spectrum presents a band structure.

C. Cacciapuoti; R. Figari; A. Posilicano

2005-04-28T23:59:59.000Z

270

Acoustic cross-correlation flowmeter for solid-gas flow  

DOE Patents (OSTI)

Apparatus for measuring particle velocity in a solid-gas flow within a pipe includes: first and second transmitting transducers for transmitting first and second ultrasonic signals into the pipe at first and second locations, respectively, along the pipe; an acoustic decoupler, positioned between said first and second transmitting transducers, for acoustically isolating said first and second signals from one another; first and second detecting transducers for detecting said first and second signals and for generating first and second detected signals; and means for cross-correlating said first and second output signals.

Sheen, S.H.; Raptis, A.C.

1984-05-14T23:59:59.000Z

271

Automated system for detection of epileptiform patterns in EEG by using a modified RBFN classifier  

Science Conference Proceedings (OSTI)

In this paper, we present a two-stage system based on a modified radial basis function network (RBFN) classifier for an automated detection of epileptiform pattern (EP) in an electroencephalographic signal. In the first stage, a discrete perceptron fed ... Keywords: Automatic spike detection, EEG, Neural networks, Pattern recognition, Radial basis function networks

Nurettin Ac?r

2005-08-01T23:59:59.000Z

272

Image replica detection system utilizing R-trees and linear discriminant analysis  

Science Conference Proceedings (OSTI)

This manuscript introduces a novel system for content-based identification of image replicas. The proposed approach utilizes image resemblance for deciding whether a test image has been replicated from a certain original or not. We formulate replica ... Keywords: Content-based monitoring, Copy image detection, Copyright protection, Fingerprinting, Linear discriminant analysis (LDA), Perceptual hashing, R-tree indexing, Replica detection, Robust hashing

Spiros Nikolopoulos; Stafanos Zafeiriou; Nikos Nikolaidis; Ioannis Pitas

2010-03-01T23:59:59.000Z

273

On a Graphics Hardware-Based Vortex Detection and Visualization System  

Science Conference Proceedings (OSTI)

We present a graphics hardware-based system for interactive denoising, vortex detection, and visualization of vector data. No intermediate results need to be read back by the application once the vector field has been loaded onto the graphics adapter. ... Keywords: Flow visualization, Graphics hardware, Vortex detection

S. Stegmaier; T. Ertl

2005-04-01T23:59:59.000Z

274

Low probability of detection underwater acoustic ...  

Science Conference Proceedings (OSTI)

... increases significantly the data processing load. B. Temporal coherence: Signal coherence time The Doppler corrected impulse responses are ...

2009-03-06T23:59:59.000Z

275

A Hierarchical Rule-Based Fault Detection and Diagnostic Method for HVAC Systems  

E-Print Network (OSTI)

A rule-based, system-level fault detection and diagnostic (FDD) method for HVAC systems was developed. It functions as an interface between multiple, equipment-specific FDD tools and a human operator. The method resolves and prioritizes conflicting fault reports from equipment-specific FDD tools, performs FDD at the system level, and presents an integrated view of an HVAC system’s fault status to an operator. A simulation study to test and evaluate the method was conducted.

Jeffrey Schein; Steven T. Bushby

2005-01-01T23:59:59.000Z

276

Design and evaluation of the ReKon : an integrated detection and assessment perimeter system.  

Science Conference Proceedings (OSTI)

Kontek Industries (Kannapolis, NC) and their subsidiary, Stonewater Control Systems (Kannapolis, NC), have entered into a cooperative research and development agreement with Sandia to jointly develop and evaluate an integrated perimeter security system solution, one that couples access delay with detection and assessment. This novel perimeter solution was designed to be configurable for use at facilities ranging from high-security military sites to commercial power plants, to petro/chemical facilities of various kinds. A prototype section of the perimeter has been produced and installed at the Sandia Test and Evaluation Center in Albuquerque, NM. This prototype system integrated fiber optic break sensors, active infrared sensors, fence disturbance sensors, video motion detection, and ground sensors. This report documents the design, testing, and performance evaluation of the developed ReKon system. The ability of the system to properly detect pedestrian or vehicle attempts to bypass, breach, or otherwise defeat the system is characterized, as well as the Nuisance Alarm Rate.

Dabling, Jeffrey Glenn; Andersen, Jason Jann; McLaughlin, James O. [Stonewater Control Systems, Inc., Kannapolis, NC

2013-02-01T23:59:59.000Z

277

TPB-coated Light Guides for Liquid Argon TPC Light Detection Systems  

E-Print Network (OSTI)

Light detection systems in Liquid Argon Time Projection Chambers (LArTPCs) require the detection of the 128 nm light produced during argon scintillation. Most detectors use Tetraphenyl Butadiene (TPB) to shift the wavelength of the light into a range visible to Photomultiplier Tubes (PMTs). These proceedings summarize characterizations of light-guides coated with a matrix of TPB in UV transmitting acrylic which are more compact than existing LArTPC light collection systems.

Ignarra, C M

2013-01-01T23:59:59.000Z

278

Acoustic Imaging Suite  

INL’s acoustic imaging technology improves methods of capturing moving images of a specified object by using a photorefractive effect to produce a full-field image of the object without using a probe to perform a full scan of the object. INL ...

279

An Analysis of a Spreader Bar Crane Mounted Gamma-Ray Radiation Detection System  

E-Print Network (OSTI)

Over 95% of imports entering the United States from outside North America arrive via cargo containers by sea at 329 ports of entry. The current layered approach for the detection only scans 5% of cargo bound for the United States. This is inadequate to protect our country. This research involved the building of a gamma-ray radiation detection system used for cargo scanning. The system was mounted on a spreader bar crane (SBC) at the Port of Tacoma (PoT) and the applicability and capabilities of the system were analyzed. The detection system provided continuous count rate and spectroscopic data among three detectors while operating in an extreme environment. In a separate set of experiments, 60Co and 137Cs sources were positioned inside a cargo container and data were recorded for several count times. The Monte Carlo N-Particle (MCNP) code was used to simulate a radioactive source inside an empty cargo container and the results were compared to experimentally recorded data. The detection system demonstrated the ability to detect 60Co, 137Cs, 192Ir, highly-enriched uranium (HEU), and weapons-grade plutonium (WGPu) with minimum detectable activities (MDA) of 5.9 ± 0.4 microcuries (?Ci), 19.3 ± 1.1 ?Ci, 11.7 ± 0.6 ?Ci, 3.5 ± 0.3 kilograms (kg), and 30.6 ± 1.3 grams (g), respectively. This system proved strong gamma-ray detection capabilities, but was limited in the detection of fissile materials Additional details of this system are presented and advantages of this approach to cargo scanning over current approaches are discussed.

Grypp, Matthew D

2013-05-01T23:59:59.000Z

280

Statistically qualified neuro-analytic failure detection method and system  

DOE Patents (OSTI)

An apparatus and method for monitoring a process involve development and application of a statistically qualified neuro-analytic (SQNA) model to accurately and reliably identify process change. The development of the SQNA model is accomplished in two stages: deterministic model adaption and stochastic model modification of the deterministic model adaptation. Deterministic model adaption involves formulating an analytic model of the process representing known process characteristics, augmenting the analytic model with a neural network that captures unknown process characteristics, and training the resulting neuro-analytic model by adjusting the neural network weights according to a unique scaled equation error minimization technique. Stochastic model modification involves qualifying any remaining uncertainty in the trained neuro-analytic model by formulating a likelihood function, given an error propagation equation, for computing the probability that the neuro-analytic model generates measured process output. Preferably, the developed SQNA model is validated using known sequential probability ratio tests and applied to the process as an on-line monitoring system. Illustrative of the method and apparatus, the method is applied to a peristaltic pump system.

Vilim, Richard B. (Aurora, IL); Garcia, Humberto E. (Idaho Falls, ID); Chen, Frederick W. (Naperville, IL)

2002-03-02T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

AMOC: Acoustic monitoring of the ocean climate of the Arctic  

Science Conference Proceedings (OSTI)

The overall objective of AMOC is to develop and design an acoustic system for long?term monitoring of the ocean temperature and ice thickness in the Arctic Ocean including the Fram Strait

Ola M. Johannessen; AMOC Group

1999-01-01T23:59:59.000Z

282

Modeling the Performance of an Acoustic Doppler Current Profiler  

Science Conference Proceedings (OSTI)

A systematic examination of measurement error in acoustic Doppler current profiler (ADCP) velocity estimates, in the limit of large signal-to-noise ratio, is made using a system model and sonar signal simulations coupled into an ADCP. The model ...

T. K. Chereskin; A. J. Harding

1993-02-01T23:59:59.000Z

283

Ultrasonic imaging system for in-process fabric defect detection  

DOE Patents (OSTI)

An ultrasonic method and system are provided for monitoring a fabric to identify a defect. A plurality of ultrasonic transmitters generate ultrasonic waves relative to the fabric. An ultrasonic receiver means responsive to the generated ultrasonic waves from the transmitters receives ultrasonic waves coupled through the fabric and generates a signal. An integrated peak value of the generated signal is applied to a digital signal processor and is digitized. The digitized signal is processed to identify a defect in the fabric. The digitized signal processing includes a median value filtering step to filter out high frequency noise. Then a mean value and standard deviation of the median value filtered signal is calculated. The calculated mean value and standard deviation are compared with predetermined threshold values to identify a defect in the fabric.

Sheen, Shuh-Haw (Naperville, IL); Chien, Hual-Te (Naperville, IL); Lawrence, William P. (Downers Grove, IL); Raptis, Apostolos C. (Downers Grove, IL)

1997-01-01T23:59:59.000Z

284

Acoustic energy-driven fluid pump and method  

DOE Patents (OSTI)

Bulk fluid motion is promoted in a gaseous fluid contained within a conduit system provided with a diffuser without the need for a mean pressure differential across the conduit system. The contacting of the gaseous fluid with unsteady energy at a selected frequency and pressure amplitude induces fluid flow through the conical diffuser. The unsteady energy can be provided by pulse combustors, thermoacoustic engines, or acoustic energy generators such as acoustic speakers.

Janus, Michael C.; Richards, George A.; Robey, Edward H.

1997-12-01T23:59:59.000Z

285

Stragegies to Detect Hidden Geothermal Systems Based on Monitoring and Analysis of CO2 in the Near-Surface Environment  

E-Print Network (OSTI)

in volcanic and geothermal areas. Appl. Geochem. , 13, 543–1977. Chemistry and Geothermal Systems. Academic Press, Newfor detecting hidden geothermal systems by near-surface gas

Lewicki, Jennifer L.; Oldenburg, Curtis M.

2008-01-01T23:59:59.000Z

286

Stabilizability and Detectability of Singularly Perturbed Linear Time-Invariant Systems with Delays in State and Control  

Science Conference Proceedings (OSTI)

A singularly perturbed linear time-invariant system with delays in state and control variables is considered. Connection between properties of open-loop stabilizability (detectability) of the reduced-order and boundary-layer systems, associated with ... Keywords: System with delays in state and control variables, open-loop stabilizability and detectability, reduced-order and boundary-layer systems, singularly perturbed system

V. Y. Glizer

1999-04-01T23:59:59.000Z

287

NETL: News Release - DOE-Funded Acoustic Monitor Passes Key Field Test  

NLE Websites -- All DOE Office Websites (Extended Search)

March 7, 2005 March 7, 2005 DOE-Funded Acoustic Monitor Passes Key Field Test Detection System Can Help Locate Pipeline Leaks, Damage MORGANTOWN, WV - A new, lightweight device that uses natural gas itself to detect leaks in natural gas pipelines has been successfully tested on a transmission main owned and operated by Dominion Transmission Inc., in Morgantown, W.Va. The test was conducted by the U.S. Department of Energy's National Energy Technology Laboratory (NETL) and West Virginia University, which has worked with NETL for the past 2 years to advance the detection system. The device is one of a suite of technologies being developed by the Energy Department's Office of Fossil Energy to effectively and efficiently monitor the 1.3 million miles of transmission and distribution pipelines which crisscross the United States

288

Improving Cyber-Security of Smart Grid Systems via Anomaly Detection and Linguistic Domain Knowledge  

Science Conference Proceedings (OSTI)

The planned large scale deployment of smart grid network devices will generate a large amount of information exchanged over various types of communication networks. The implementation of these critical systems will require appropriate cyber-security measures. A network anomaly detection solution is considered in this work. In common network architectures multiple communications streams are simultaneously present, making it difficult to build an anomaly detection solution for the entire system. In addition, common anomaly detection algorithms require specification of a sensitivity threshold, which inevitably leads to a tradeoff between false positives and false negatives rates. In order to alleviate these issues, this paper proposes a novel anomaly detection architecture. The designed system applies the previously developed network security cyber-sensor method to individual selected communication streams allowing for learning accurate normal network behavior models. Furthermore, the developed system dynamically adjusts the sensitivity threshold of each anomaly detection algorithm based on domain knowledge about the specific network system. It is proposed to model this domain knowledge using Interval Type-2 Fuzzy Logic rules, which linguistically describe the relationship between various features of the network communication and the possibility of a cyber attack. The proposed method was tested on experimental smart grid system demonstrating enhanced cyber-security.

Ondrej Linda; Todd Vollmer; Milos Manic

2012-08-01T23:59:59.000Z

289

Context and profile based cascade classifier for efficient people detection and safety care system  

Science Conference Proceedings (OSTI)

This study propose a system of extracting and tracking objects for a multimedia system and addresses how to extract the head feature from an object area. It is observed in images taken from real-time records like a video, there is always a variance in ... Keywords: Context-awareness, Feature selection, Human detection, Tracking

Kang-Dae Lee; Mi Young Nam; Kyung-Yong Chung; Young-Ho Lee; Un-Gu Kang

2013-03-01T23:59:59.000Z

290

Data flow analysis for anomaly detection and identification toward resiliency in extreme scale systems  

Science Conference Proceedings (OSTI)

The increased complexity and scale of high performance computing and future extreme-scale systems have made resilience a key issue, since it is expected that future systems will have various faults during critical operations. It is also expected that ... Keywords: Anomaly, Data analysis, Fault detection and identification, Resilience

Byoung Uk Kim

2012-07-01T23:59:59.000Z

291

Detecting Triangle Inequality Violations in Internet Coordinate Systems by Supervised Learning  

Science Conference Proceedings (OSTI)

Internet Coordinates Systems (ICS) are used to predict Internet distances with limited measurements. However the precision of an ICS is degraded by the presence of Triangle Inequality Violations (TIVs). Simple methods have been proposed to detect TIVs, ... Keywords: Decision Trees, Internet Coordinate System, Supervised Learning, Triangle Inequality Violation

Yongjun Liao; Mohamed Ali Kaafar; Bamba Gueye; François Cantin; Pierre Geurts; Guy Leduc

2009-05-01T23:59:59.000Z

292

A knowledge-based system approach for sensor fault modeling, detection and mitigation  

Science Conference Proceedings (OSTI)

Sensors are vital components for control and advanced health management techniques. However, sensors continue to be considered the weak link in many engineering applications since often they are less reliable than the system they are observing. This ... Keywords: Detection, Expert system, Neural Network, Sensor failure

Jonny Carlos da Silva; Abhinav Saxena; Edward Balaban; Kai Goebel

2012-09-01T23:59:59.000Z

293

An in-cell alpha detection system for radioisotope component assembly operations  

DOE Green Energy (OSTI)

A remotely operated alpha detection system is being developed for use at the Radioisotope Power Systems Facility at the US Department of Energy's Hanford Site. It will be used in hot cells being constructed to assemble components of Radioisotope Thermoelectric Generators for space power applications. The in-cell detection equipment will survey radiological swipe samples to determine smearable surface contamination levels on radioisotope fuel, fueled components, and hot-cell work areas. This system is potentially adaptable to other hot cell and glovebox applications where radiation dose rates and contamination levels are expected to be low. 2 figs.

Carteret, B.A. (Westinghouse Hanford Co., Richland, WA (United States)); Goles, R.W. (Pacific Northwest Lab., Richland, WA (United States))

1991-09-01T23:59:59.000Z

294

Microsoft PowerPoint - In-Situ Acoustic Measurements_Skliar  

NLE Websites -- All DOE Office Websites (Extended Search)

Bramanti, M., Tonazzini, A., Tonazzini, A., "An acoustic pyrometer system for tomographic thermal imaging in power plant boilers, " IEEE Trans. Instrumentation and Measurement,...

295

Clean Burst Rapid Acoustic Lysis for Point-of-Care Diagnostics ...  

CleanBurst System (A) five channel acoustic array that couples reversibly to user-specified nano/microfluidic devices (B). The nano/microfluidic device (B) reversibly ...

296

Development of a scintillation flow-cell detection system for environmental restoration and waste management applications  

Science Conference Proceedings (OSTI)

A flow-cell detection system was developed utilizing a coincidence circuit and tested with BaF{sub 2}, CaF{sub 2}:Eu and scintillating glass. The coincidence detection system reduced the background from {approximately}200 cps to {approximately}0.5 cps. The detection efficiencies for these cells ranged from 0.38 to 0.66 for {sup 45}Ca beta particles (E{sub max} = 0.257 MeV) and from 0.45 to 0.52 for {sup 233}U alpha particles (E{sub {alpha}} = 4.8 MeV). The minimum detectable activity was calculated for a 30 s count time and determined to be in the range of 1-2 Bq.

DeVol, T.A.; Branton, S.D.; Fjeld, R.A.

1996-05-01T23:59:59.000Z

297

Acoustic paramagnetic logging tool  

DOE Patents (OSTI)

New methods and apparatus are disclosed which allow measurement of the presence of oil and water in geological formations using a new physical effect called the Acoustic Paramagnetic Logging Effect (APLE). The presence of petroleum in formation causes a slight increase in the earth's magnetic field in the vicinity of the reservoir. This is the phenomena of paramagnetism. Application of an acoustic source to a geological formation at the Larmor frequency of the nucleons present causes the paramagnetism of the formation to disappear. This results in a decrease in the earth3 s magnetic field in the vicinity of the oil bearing formation. Repetitively frequency sweeping the acoustic source through the Larmor frequency of the nucleons present (approx. 2 kHz) causes an amplitude modulation of the earth's magnetic field which is a consequence of the APLE. The amplitude modulation of the earth's magnetic field is measured with an induction coil gradiometer and provides a direct measure of the amount of oil and water in the excitation zone of the formation . The phase of the signal is used to infer the longitudinal relaxation times of the fluids present, which results in the ability in general to separate oil and water and to measure the viscosity of the oil present. Such measurements may be preformed in open boreholes and in cased well bores.

Vail, III, William B. (Bothell, WA)

1988-01-01T23:59:59.000Z

298

Development of an Automated Microfluidic System for DNA Collection, Amplification, and Detection of Pathogens  

Science Conference Proceedings (OSTI)

This project was focused on developing and testing automated routines for a microfluidic Pathogen Detection System. The basic pathogen detection routine has three primary components; cell concentration, DNA amplification, and detection. In cell concentration, magnetic beads are held in a flow cell by an electromagnet. Sample liquid is passed through the flow cell and bacterial cells attach to the beads. These beads are then released into a small volume of fluid and delivered to the peltier device for cell lysis and DNA amplification. The cells are lysed during initial heating in the peltier device, and the released DNA is amplified using polymerase chain reaction (PCR) or strand displacement amplification (SDA). Once amplified, the DNA is then delivered to a laser induced fluorescence detection unit in which the sample is detected. These three components create a flexible platform that can be used for pathogen detection in liquid and sediment samples. Future developments of the system will include on-line DNA detection during DNA amplification and improved capture and release methods for the magnetic beads during cell concentration.

Hagan, Bethany S.; Bruckner-Lea, Cynthia J.

2002-12-01T23:59:59.000Z

299

Idaho National Laboratory Supervisory Control and Data Acquisition Intrusion Detection System (SCADA IDS)  

SciTech Connect

Current Intrusion Detection System (IDS) technology is not suited to be widely deployed inside a Supervisory, Control and Data Acquisition (SCADA) environment. Anomaly- and signature-based IDS technologies have developed methods to cover information technology-based networks activity and protocols effectively. However, these IDS technologies do not include the fine protocol granularity required to ensure network security inside an environment with weak protocols lacking authentication and encryption. By implementing a more specific and more intelligent packet inspection mechanism, tailored traffic flow analysis, and unique packet tampering detection, IDS technology developed specifically for SCADA environments can be deployed with confidence in detecting malicious activity.

Jared Verba; Michael Milvich

2008-05-01T23:59:59.000Z

300

Cylindrical Acoustic Levitator/Concentrator  

NLE Websites -- All DOE Office Websites (Extended Search)

Cylindrical Acoustic Levitator/Concentrator Cylindrical Acoustic Levitator/Concentrator Cylindrical Acoustic Levitator/Concentrator A low-power, inexpensive acoustic apparatus for levitation and/or concentration of aerosols and small liquid/solid samples having particulates up to several millimeters in diameter in air or other fluids is described. Available for thumbnail of Feynman Center (505) 665-9090 Email Cylindrical Acoustic Levitator/Concentrator A low-power, inexpensive acoustic apparatus for levitation and/or concentration of aerosols and small liquid/solid samples having particulates up to several millimeters in diameter in air or other fluids is described. It is constructed from a commercially available, hollow cylindrical piezoelectric crystal which has been modified to tune the resonance frequency of the breathing mode resonance of the crystal to that

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Method and apparatus for detecting timing errors in a system oscillator  

DOE Patents (OSTI)

This invention is comprised of a method of detecting timing errors in a system oscillator for an electronic device, such as a power supply, includes the step of comparing a system oscillator signal with a delayed generated signal and generating a signal representative of the timing error when the system oscillator signal is not identical to the delayed signal. An LED indicates to an operator that a timing error has occurred. A hardware circuit implements the above-identified method.

Gliebe, R.J.; Kramer, W.R.

1991-12-31T23:59:59.000Z

302

Method and apparatus for detecting timing errors in a system oscillator  

DOE Patents (OSTI)

A method of detecting timing errors in a system oscillator for an electronic device, such as a power supply, includes the step of comparing a system oscillator signal with a delayed generated signal and generating a signal representative of the timing error when the system oscillator signal is not identical to the delayed signal. An LED indicates to an operator that a timing error has occurred. A hardware circuit implements the above-identified method.

Gliebe, Ronald J. (Library, PA); Kramer, William R. (Bethel Park, PA)

1993-01-01T23:59:59.000Z

303

Pulse combusted acoustic agglomeration apparatus and process  

SciTech Connect

An improved apparatus and process for removal of particulates entrained in a gas stream are provided. The removal process employs a pulse combustor to provide an acoustic pressure wave to acoustically enhance bimodal agglomeration of particulates which may be collected and removed using a conventional separation apparatus. A particulate having a size different from the size of the particulate in the gas stream to be cleaned is introduced into the system to effectuate the bimodal process. The apparatus may be employed as a direct fired system for improved operation of gas-operated equipment such as a gas turbine, or may, alternatively, be employed as an add-on subsystem for combustion exhaust clean-up. Additionally, the added particulate may be a sorbent for effecting sorption of other contaminants such as sulfur. Various other particulates for contaminant removal may also be introduced into the system as exemplified by alkali-gettering agents.

Mansour, Momtaz N. (Columbia, MD)

1993-01-01T23:59:59.000Z

304

A Field-Deployable Real-Time Laser-Based Non-Intrusive Detection System for Measurement of True Travel Time on the Highway  

E-Print Network (OSTI)

A Real- Time Laser-Based Detection System for Measurement ofTime Laser- Based Prototype Detection System for MeasurementLaser-Based Non-Intrusive Detection System for Measurement

Cheng, Harry H.; Shaw, Ben; Palen, Joe; Wang, Zhaoqing; Chen, Bo

2002-01-01T23:59:59.000Z

305

Efficient model-based leak detection in boiler steam-water systems Xi Sun, Tongwen Chen *, Horacio J. Marquez  

E-Print Network (OSTI)

Efficient model-based leak detection in boiler steam-water systems Xi Sun, Tongwen Chen *, Horacio detection in boiler steam-water systems. The algorithm has been tested using real industrial data from Syncrude Canada, and has proven to be effective in detection of boiler tube or steam leaks; proper

Marquez, Horacio J.

306

Adapting Bro into SCADA: building a specification-based intrusion detection system for the DNP3 protocol  

Science Conference Proceedings (OSTI)

When SCADA systems are exposed to public networks, attackers can more easily penetrate the control systems that operate electrical power grids, water plants, and other critical infrastructures. To detect such attacks, SCADA systems require an intrusion ... Keywords: Bro, DNP3, SCADA, specification-based intrusion detection system

Hui Lin; Adam Slagell; Catello Di Martino; Zbigniew Kalbarczyk; Ravishankar K. Iyer

2013-01-01T23:59:59.000Z

307

DEVELOPMENT OF AN EMAT IN-LINE INSPECTION SYSTEM FOR DETECTION, DISCRIMINATION, AND GRADING OF STRESS CORROSION CRACKING IN PIPELINES  

SciTech Connect

This report describes progress, experiments, and results for a project to develop a pipeline inline inspection tool that uses electromagnetic acoustic transducers (EMATs) to detect and grade stress corrosion cracking (SCC). There is a brief introduction that gives background material about EMATs and relevant previous Tuboscope work toward a tool. This work left various choices about the modes and transducers for this project. The experimental section then describes the lab systems, improvements to these systems, and setups and techniques to narrow the choices. Improvements, which involved transducer matching networks, better magnetic biasing, and lower noise electronics, led to improved signal to noise (SNR) levels. The setups permitted transducer characterizations and interaction measurements in plates with man-made cracks, pipeline sections with SCC, and a full pipe with SCC. The latter were done with a moveable and compact EMAT setup, called a lab mouse, which is detailed. Next, the results section justifies the mode and transducer choices. These were for magnetostrictive EMATs and the use of EMAT launched modes: SH0 (at 2.1 MHz-mm) and SV1 (at 3.9 MHz-mm). This section then gives details of measurements on these modes. The measurements consisted of signal to noise ratio, insertion loss, magnetic biasing sensitivities crack reflection and transmission coefficients, beam width, standoff and tilt sensitivities. For most of the measurements the section presents analysis curves, such as reflection coefficient versus crack depth. Some notable results for the chosen modes are: that acceptable SNRs were generated in a pipe with magnetostrictive EMATs, that optimum bias for magnetostrictive transmitters and receivers is magnetic saturation, that crack reflection and transmission coefficients from crack interactions agree with 2 D simulations and seem workable for crack grading, and that the mouse has good waveform quality and so is ready for exhaustive measurement EMAT scans of SCC interactions. This section also reviews further coil optimization and implementation requirements. These involve transmitter and receiver power, acquisition parameters, and magnetic configuration. At this time all these seem reasonable for an ILI tool.

Jeff Aron; Jon Gore, Roger Dalton; Stuart Eaton; Adrian Bowles; Owen Thomas; Tim Jarman

2003-07-01T23:59:59.000Z

308

Acoustic Enhancement of Photodetecting Devices  

for suspect materials, to advanced weapons guidance. Using a high Q acoustic resonator, the invention increases the sensitivity of the detectors by an order of

309

Cylindrical Acoustic Levitator/Concentrator  

NLE Websites -- All DOE Office Websites (Extended Search)

A low-power, inexpensive acoustic apparatus for levitation andor concentration of aerosols and small liquidsolid samples having particulates up to several millimeters in...

310

CFD-based application of the Nyquist criterion to thermo-acoustic instabilities  

Science Conference Proceedings (OSTI)

A novel approach for the analysis of self-excited instabilities in thermo-acoustic systems is proposed. Combining computational fluid dynamics with low-order acoustic modeling, the open-loop transfer function of the system under investigation is computed. ... Keywords: 02.30.Yy, 43.28.Kt, 43.35.Ud, 43.60.Bf, 47.50.Gj, 52.35.Dm, Computational fluid dynamics, Control theory, Instabilities, Thermo-acoustics

J. Kopitz; W. Polifke

2008-07-01T23:59:59.000Z

311

Mercury Detection with Gold Nanoparticles  

E-Print Network (OSTI)

R. J. Warmack, “Detection of mercury vapor using resonatingA surface acoustic wave mercury vapor sensor,” Ieee Trans.N. E. Selin, “Integrating mercury science and policy in the

Crosby, Jeffrey

2013-01-01T23:59:59.000Z

312

Pathogen Detection Lab-On-A-Chip (PADLOC) System for Plant Pathogen Diagnosis  

E-Print Network (OSTI)

Polymerase Chain Reaction (PCR) detection paves the way to reliable and rapid diagnosis of diseases and has been used extensively since its introduction. Many miniaturized PCR systems were presented by microfluidics and lab-on-a-chip community. However, most of the developed systems did not employ real-time detection and thus required post-PCR processes to obtain results. Among the few real-time PCR systems, almost all of them aimed for medical applications and those for plant pathogen diagnosis systems are almost non-existent in the literature. In this work, we are presenting a portable system that employs microfluidics PCR system with integrated optical systems to accomplish real-time quantitative PCR for plant pathogen diagnosis. The system is comprised of a PCR chip that has a chamber for PCR sample with integrated metal heaters fabricated by standard microfabrication procedures, an optical system that includes lenses, filters, a dichroic mirror and a photomultiplier tube (PMT) to achieve sensitive fluorescence measurement capability and a computer control system for Proportional Integral Derivative (PID) control and data acquisition. The optical detection system employs portable components and has a size of 3.9 x 5.9 x 11.9 cm which makes it possible to be used in field settings. On the device side, two different designs are used. The first design includes a single chamber in a 25.4 x 25.4 mm device and the capacity of the chamber is 9 micro-liters which is sufficient to do gel electrophoresis verification. The second design has three 2.2 micro-liter chambers squeezed in the same size device while having smaller volume to increase high throughput of the system. The operation of the system was demonstrated using Fusarium oxysporum spf. lycopersici which is a fungal plant pathogen that affects crops in the USA. In the presence of the plant pathogen, noticeable increases in the photomultiplier tube output were observed which means successful amplifications and detections occurred. The results were confirmed using gel electrophoresis which is a conventional post-PCR process to determine the existence and length of the amplified DNA. Clear bands located in the expected position were observed following the gel electrophoresis. Overall, we have presented a portable PCR system that has the capability of detecting plant pathogens.

Cifci, Osman

2012-08-01T23:59:59.000Z

313

Method and apparatus for providing pulse pile-up correction in charge quantizing radiation detection systems  

DOE Patents (OSTI)

This invention is comprised of a radiation detection method and system for continuously correcting the quantization of detected charge during pulse pile-up conditions. Charge pulses from a radiation detector responsive to the energy of detected radiation events are converted to voltage pulses of predetermined shape whose peak amplitudes are proportional to the quantity of charge of each corresponding detected event by means of a charge-sensitive preamplifier. These peak amplitudes are sampled and stored sequentially in accordance with their respective times of occurrence. Based on the stored peak amplitudes and times of occurrence, a correction factor is generated which represents the fraction of a previous pulses influence on a preceding pulse peak amplitude. This correction factor is subtracted from the following pulse amplitude in a summing amplifier whose output then represents the corrected charge quantity measurement.

Britton, C.L. Jr.; Wintenberg, A.L.

1992-12-31T23:59:59.000Z

314

Development of a geothermal acoustic borehole televiewer  

DOE Green Energy (OSTI)

Most geothermal wells are drilled in hard rock formations where fluid flow is through systems of open fractures. Productivity of these wells is usually determined by the extent of intersection of the wellbore with the fracture system. A need exists for fracture mapping methods and tools which can operate in a geothermal environment. In less hostile environments, the acoustic borehole televiewer has been shown to be a useful tool for determining location, orientation, and characterization of fractures as they intersect the borehole and for general wellbore and casing inspection. The development conducted at Sandia National Laboratories to adapt an acoustic borehole televiewer for operation in a geothermal environment is described. The modified instrument has been successfully tested at temperatures as high as 280/sup 0/C and pressures up to 5000 psi, and used successfully to map fractures and casing damage in geothermal wells.

Heard, F.E.; Bauman, T.J.

1983-08-01T23:59:59.000Z

315

Pulse combusted acoustic agglomeration apparatus and process  

SciTech Connect

An improved apparatus and process for removal of particulates entrained in a gas stream are provided. The removal process employs a pulse combustor to provide an acoustic pressure wave to acoustically enhance agglomeration of particulates which may be collected and removed using a conventional separation apparatus. The apparatus may be employed as a direct fired system for improved operation of gas-operated equipment such as a gas turbine, or may, alternatively, be employed as an add-on subsystem for combustion exhaust clean-up. Additionally, added particulates may include a sorbent for effecting sorption of other contaminants such as sulfur. Various other particulates for contaminant removal may also be introduced into the system as exemplified by alkali-gettering agents.

Mansour, Momtaz N. (Columbia, MD); Chandran, Ravi (Ellicott City, MD)

1994-01-01T23:59:59.000Z

316

Multipurpose Acoustic Sensor for Downhole Fluid Monitoring  

Science Conference Proceedings (OSTI)

The projects objectives and purpose are to: (1) development a multipurpose acoustic sensor for downhole fluid monitoring in Enhanced Geothermal Systems (EGS) reservoirs over typical ranges of pressures and temperatures and demonstrate its capabilities and performance for different EGS systems; (2) determine in real-time and in a single sensor package several parameters - temperature, pressure, fluid flow and fluid properties; (3) needed in nearly every phase of an EGS project, including Testing of Injection and Production Wells, Reservoir Validation, Inter-well Connectivity, Reservoir Scale Up and Reservoir Sustainability. (4) Current sensors are limited to operating at lower temperatures, but the need is for logging at high temperatures. The present project deals with the development of a novel acoustic-based sensor that can work at temperatures up to 374 C, in inhospitable environments.

Pantea, Cristian [Los Alamos National Laboratory

2012-05-04T23:59:59.000Z

317

Building Energy Software Tools Directory: Acoustics Program  

NLE Websites -- All DOE Office Websites (Extended Search)

Acoustics Program Developed to help designers accurately model the sound level reaching building tenant's ears, the Trane Acoustics Program (TAP) "projects" equipment sound power...

318

Silent Positioning in Underwater Acoustic Sensor Networks  

E-Print Network (OSTI)

In this paper, we present a silent positioning scheme termed as UPS for underwater acoustic sensor networks. UPS relies on the time-difference of arrivals measured locally at a sensor to detect range differences from the sensor to four anchor nodes. These range differences are averaged over multiple beacon intervals before they are combined to estimate the 3D sensor location through trilateration. UPS requires no time-synchronization and provides location privacy at underwater vehicles/sensors whose locations need to be determined. To study the performance of UPS, we model the underwater acoustic channel as a modified Ultra Wide Band (UWB) S-V model: the arrival of each path cluster and paths within each cluster follow double Poisson distributions, and the multipath channel gain follows a Rician distribution. Based on this channel model, we perform both theoretical analysis and simulation study on the position error of UPS under acoustic fading channels. The obtained results indicate that UPS is an effective scheme for underwater vehicle/sensor self-positioning.

Xiuzhen Cheng; Haining Shu; Qilian Liang; David Hung-chang Du

2007-01-01T23:59:59.000Z

319

Acoustic Logs At Alum Area (Moos & Ronne, 2010) | Open Energy Information  

Open Energy Info (EERE)

Acoustic Logs At Alum Geothermal Area (Moos & Ronne, Acoustic Logs At Alum Geothermal Area (Moos & Ronne, 2010) Exploration Activity Details Location Alum Geothermal Area Exploration Technique Acoustic Logs Activity Date Usefulness useful DOE-funding Unknown Notes The results revealed that acoustic images are superior to electrical images to detect structurally important natural fractures and stress-induced wellbore breakouts and tensile wall fractures, and were adequate to detect stratigraphic features. References Daniel Moos, Joel Ronne (2010) Selecting The Optimal Logging Suite For Geothermal Reservoir Evaluation- Results From The Alum 25-29 Well, Nevada Retrieved from "http://en.openei.org/w/index.php?title=Acoustic_Logs_At_Alum_Area_(Moos_%26_Ronne,_2010)&oldid=510215" Categories: Exploration Activities

320

Neutron interrogation system using high gamma ray signature to detect contraband special nuclear materials in cargo  

DOE Patents (OSTI)

A system for inspecting cargo for the presence of special nuclear material. The cargo is irradiated with neutrons. The neutrons produce fission products in the special nuclear material which generate gamma rays. The gamma rays are detecting indicating the presence of the special nuclear material.

Slaughter, Dennis R. (Oakland, CA); Pohl, Bertram A. (Berkeley, CA); Dougan, Arden D. (San Ramon, CA); Bernstein, Adam (Palo Alto, CA); Prussin, Stanley G. (Kensington, CA); Norman, Eric B. (Oakland, CA)

2008-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Detecting Free Carriers in Organic Photovoltaic Systems: Time-Resolved Microwave Conductivity  

DOE Green Energy (OSTI)

In here we report on using flash photolysis, time-resolved microwave conductivity (fp-TRMC) as a tool for detecting the fate of mobile charge carriers. This spectroscopy does not require electrodes and can therefore focus attention on the active components of the donor- acceptor system and provide insight into the heart of OPV device functionality.

Rumbles, G.; Kopidakis, N.; Coffey, D.; Ferguson, A.; Dayal, S.; Reid, O.

2011-01-01T23:59:59.000Z

322

Laser system for natural gas detection. Phase I. Laboratory feasibility studies  

SciTech Connect

Laboratory and field tests successfully proved the feasibility of laser remote sensing as a leak-survey tool in gas distribution systems. Using a pair of helium neon lasers to measure methane, the device exhibited at a 43-ft range a methane detection limit of 3 ppm in a gas plume with a 3.3-ft path length.

Grant, W.B.; Hinkley, E.D.

1981-12-01T23:59:59.000Z

323

Joint symbol detection and channel parameter estimation in asynchronous DS-CDMA systems  

Science Conference Proceedings (OSTI)

A method for jointly estimating the time delay and complex gain parameters, as well as detecting the transmitted symbols in an asynchronous multipath DS-CDMA system, is presented. A short training sequence is used to obtain a coarse estimate of the channel ...

A. Ranheim; P. Pelin

2000-02-01T23:59:59.000Z

324

Methods, systems and devices for detecting threatening objects and for classifying magnetic data  

Science Conference Proceedings (OSTI)

A method for detecting threatening objects in a security screening system. The method includes a step of classifying unique features of magnetic data as representing a threatening object. Another step includes acquiring magnetic data. Another step includes determining if the acquired magnetic data comprises a unique feature.

Kotter, Dale K. (Shelley, ID); Roybal, Lyle G. (Idaho Falls, ID); Rohrbaugh, David T. (Idaho Falls, ID); Spencer, David F. (Idaho Falls, ID)

2012-01-24T23:59:59.000Z

325

The electron geodesic acoustic mode  

Science Conference Proceedings (OSTI)

In this report, a novel new mode, named the electron geodesic acoustic mode, is presented. This mode can occur in toroidal plasmas like the conventional geodesic acoustic mode (GAM). The frequency of this new mode is much larger than that of the conventional GAM by a factor equal to the square root of the ion to electron mass ratio.

Chakrabarti, N. [Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Calcutta 700 064 (India); Guzdar, P. N. [Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742 (United States); Kaw, P. K. [Institute for Plasma Research Bhat, Gandhinagar 382428 (India)

2012-09-15T23:59:59.000Z

326

DEVELOPMENT OF AN EMAT IN-LINE INSPECTION SYSTEM FOR DETECTION, DISCRIMINATION, AND GRADING OF STRESS CORROSION CRACKING IN PIPELINES  

SciTech Connect

This report describes prototypes, measurements, and results for a project to develop a prototype pipeline in-line inspection (ILI) tool that uses electromagnetic acoustic transducers (EMATs) to detect and grade stress corrosion cracking (SCC). The introduction briefly provides motivation and describes SCC, gives some background on EMATs and guided ultrasonic waves, and reviews promising results of a previous project using EMATs for SCC. The experimental section then describes lab measurement techniques and equipment, the lab mouse and prototypes for a mule, and scan measurements made on SCC. The mouse was a moveable and compact EMAT setup. The prototypes were even more compact circuits intended to be pulled or used in an ILI tool. The purpose of the measurements was to determine the best modes, transduction, and processing to use, to characterize the transducers, and to prove EMATs and mule components could produce useful results. Next, the results section summarizes the measurements and describes the mouse scans, processing, prototype circuit operating parameters, and performance for SH0 scans. Results are given in terms of specifications--like SNR, power, insertion loss--and parametric curves--such as signal amplitude versus magnetic bias or standoff, reflection or transmission coefficients versus crack depth. Initially, lab results indicated magnetostrictive transducers using both SH0 and SV1 modes would be worthwhile to pursue in a practical ILI system. However, work with mule components showed that SV1 would be too dispersive, so SV1 was abandoned. The results showed that reflection measurements, when normalized by the direct arrival are sensitive to and correlated with SCC. This was not true for transmission measurements. Processing yields a high data reduction, almost 60 to 1, and permits A and C scan display techniques and software already in use for pipeline inspection. An analysis of actual SH0 scan results for SCC of known dimensions showed that length and depth could be determined for deep enough cracks. Defect shadow and short length effects were apparent but may be taken into account. The SH0 scan was done with the mule prototype circuits and permanent magnet EMATs. These gave good enough results that this hardware and the processing techniques are very encouraging for use in a practical ILI tool.

Jeff Aron; Jeff Jia; Bruce Vance; Wen Chang; Raymond Pohler; Jon Gore; Stuart Eaton; Adrian Bowles; Tim Jarman

2005-02-01T23:59:59.000Z

327

Low-Frequency Atmospheric Acoustic Energy Associated with Vortices Produced by Thunderstorms  

Science Conference Proceedings (OSTI)

An infrasonic observatory collocated with the Colorado State University CHILL radar during the summer of 1995 permitted unique comparisons between severe storm kinematics and detected acoustic energy at subaudible frequencies near 1 Hz. Radar ...

A. J. Bedard

2005-01-01T23:59:59.000Z

328

Signal processing for an acoustically based fetal heart rate monitor  

Science Conference Proceedings (OSTI)

A least?mean?square (lms) linear prediction algorithm has been developed to accomplish detection of fetal heart tones and thereby derive heart rate from a raw signal generated by a previously described passive acoustical sensor array. The desired heart tone signal has a characteristic signature but is of extremely low amplitude and contaminated with noise consisting of large?amplitude maternal heart tones

Robert A. Pretlow; John W. Stoughton

1991-01-01T23:59:59.000Z

329

Fast Detection and Mitigation of Cascading Outages in the Power System  

E-Print Network (OSTI)

This dissertation studies the causes and mechanism of power system cascading outages and proposes the improved interactive scheme between system-wide and local levels of monitoring and control to quickly detect, classify and mitigate the cascading outages in power system. A novel method for evaluating the vulnerability of individual components as well as the whole power system, which is named as weighted vulnerability analysis, is developed. Betweenness centrality is used to measure the importance of each bus and transmission line in the modeled power system network, which is in turn used to determine the weights for the weighted vulnerability index. It features fast reaction time and achieves higher accuracy when dealing with the cascading outage detection, classification and mitigation over the traditional methods. The overload problem due to power flow redistribution after one line tripped is a critical factor contributing to the cascading outages. A parallel corridor searching method is proposed to quickly identify the most vulnerable components after tripping a transmission line. The power system topology model can be simplified into state graph after searching the domains for each generator, the commons for each bus, and links between the commons. The parallel corridor will be determined by searching the links and commons in system topology graph for the given state of power system operation. During stressed operating state, either stable or unstable power swing may have impacts on distance relay judgment and lead to relay misoperation, which will result in the power system lines being tripped and as a consequence power system operating state becoming even more stressful. At the local level, an enhanced fault detection tool during power system swing is developed to reduce the chance of relay misoperation. Comprehensive simulation studies have been implemented by using the IEEE 39-bus and 118-bus test systems. The results are promising because: The results from weighted vulnerability analysis could provide better system situational awareness and accurate information about the disturbance; The results form parallel corridor search method could identify the most vulnerable lines after power re-distribution, which will give operator time to take remedial actions; The results from new travelling wave and wavelet transform based fault detection could reduce the impact of relay misoperation.

Pang, Chengzong

2011-12-01T23:59:59.000Z

330

Development of an impedance-based sensor for the detection of catalyst coking in fuel-reforming systems.  

E-Print Network (OSTI)

??A novel sensor for detecting the early stages of catalyst coking in fuel reforming systems has been developed. The sensor was manufactured by inkjet printing… (more)

Wheeler, Jeffrey L.

2013-01-01T23:59:59.000Z

331

Addressing the Challenges of Anomaly Detection for Cyber Physical Energy Grid Systems  

Science Conference Proceedings (OSTI)

The consolidation of cyber communications networks and physical control systems within the energy smart grid introduces a number of new risks. Unfortunately, these risks are largely unknown and poorly understood, yet include very high impact losses from attack and component failures. One important aspect of risk management is the detection of anomalies and changes. However, anomaly detection within cyber security remains a difficult, open problem, with special challenges in dealing with false alert rates and heterogeneous data. Furthermore, the integration of cyber and physical dynamics is often intractable. And, because of their broad scope, energy grid cyber-physical systems must be analyzed at multiple scales, from individual components, up to network level dynamics. We describe an improved approach to anomaly detection that combines three important aspects. First, system dynamics are modeled using a reduced order model for greater computational tractability. Second, a probabilistic and principled approach to anomaly detection is adopted that allows for regulation of false alerts and comparison of anomalies across heterogeneous data sources. Third, a hierarchy of aggregations are constructed to support interactive and automated analyses of anomalies at multiple scales.

Ferragut, Erik M [ORNL; Laska, Jason A [ORNL; Melin, Alexander M [ORNL; Czejdo, Bogdan [ORNL

2013-01-01T23:59:59.000Z

332

Towards an intrusion detection system for battery exhaustion attacks on mobile computing devices  

E-Print Network (OSTI)

Mobile computers are subject to a unique form of denial of service attack known as a battery exhaustion attack, in which an attacker attempts to rapidly drain the battery of the device. In this paper we present our first steps in the design of an intrusion detection system for these attacks, a system that takes into account the performance, energy, and memory constraints of mobile computing devices. This intrusion detection system uses several parameters, such as CPU load and disk accesses, to estimate the power consumption using a linear regression model, allowing us to find the energy used on a per process basis, and thus identifying processes that are potentially battery exhaustion attacks. 1.

Daniel C. Nash; Thomas L. Martin; Dong S. Ha; Michael S. Hsiao

2005-01-01T23:59:59.000Z

333

The detection, prevention and mitigation of cascading outages in the power system  

E-Print Network (OSTI)

This dissertation studies the causes and mechanism of power system cascading outages and develops new methods and new tools to help detect, prevent and mitigate the outages. Three effective solutions: a steady state control scheme, a transient stability control scheme, and an interactive system-wide and local scheme have been proposed using those new methods and tools. A steady state control scheme can help detect and prevent the possible cascading outage at its initial slow steady state progress stage. It uses new methods and new tools to solve the line overload, congestion or bus high/low voltage problems. New methods, such as vulnerability index (VI), margin index (MI), network contribution factor (NCF), topology processing and selected minimum load shedding (SMLS), and new tools, such as transmission network control based on a network contribution factor (NCF) method, generator control based on a generator distribution factor (GDF) method, and load control based on a load distribution factor (LDF) method have been proposed and developed. A transient stability control scheme can help prevent and mitigate the possible cascading outage at its transient progress stage if there is enough time to take action. It uses one Lyapunov direct method, potential energy boundary surface (PEBS) method, and sensitivity analysis of transient energy margin for fast stabilizing control. The results are verified by the accurate time-domain transient stability analysis method. The interactive scheme takes advantage of accurate system-wide and local information and analysis results, uses some techniques from both steady state control and transient stability control, works at both the system-wide level and local substation level, monitors the system all the time, and takes actions when needed to help detect, prevent and mitigate the possible cascading outage. Comprehensive simulation studies have been implemented using the IEEE 14- bus, 24-bus, 39-bus and 118-bus systems and promising results show the ability of the proposed solutions to help detect, prevent and mitigate cascading outages.

Song, Hongbiao

2006-12-01T23:59:59.000Z

334

Visualizing microbial pollution in Santa Monica Bay with Geographic Information Systems (GIS) and through field-testing a rapid, robust, field-portable water detection sensing system  

E-Print Network (OSTI)

hic Information Systems (GIS) and Through Field - testing aEngineering, UCLA Introduction: GIS and rapid detection:water quality characterizi ng GIS is a powerful mapping tool

2009-01-01T23:59:59.000Z

335

Acoustical heat-pumping engine  

DOE Patents (OSTI)

The disclosure is directed to an acoustical heat pumping engine without moving seals. A tubular housing holds a compressible fluid capable of supporting an acoustical standing wave. An acoustical driver is disposed at one end of the housing and the other end is capped. A second thermodynamic medium is disposed in the housing near to but spaced from the capped end. Heat is pumped along the second thermodynamic medium toward the capped end as a consequence both of the pressure oscillation due to the driver and imperfect thermal contact between the fluid and the second thermodynamic medium.

Wheatley, J.C.; Swift, G.W.; Migliori, A.

1981-08-14T23:59:59.000Z

336

Hot spot detection system for vanes or blades of a combustion turbine  

DOE Patents (OSTI)

This invention includes a detection system that can determine if a turbine component, such as a turbine vane or blade, has exceeded a critical temperature, such as a melting point, along any point along the entire surface of the vane or blade. This system can be employed in a conventional combustion turbine having a compressor, a combustor and a turbine section. Included within this system is a chemical coating disposed along the entire interior surface of a vane or blade and a closed loop cooling system that circulates a coolant through the interior of the vane or blade. If the temperature of the vane or blade exceeds a critical temperature, the chemical coating will be expelled from the vane or blade into the coolant. Since while traversing the closed loop cooling system the coolant passes through a detector, the presence of the chemical coating in the coolant will be sensed by the system. If the chemical coating is detected, this indicates that the vane or blade has exceeded a critical temperature.

Twerdochlib, Michael (Oviedo, FL)

1999-01-01T23:59:59.000Z

337

Hot spot detection system for vanes or blades of a combustion turbine  

DOE Patents (OSTI)

This invention includes a detection system that can determine if a turbine component, such as a turbine vane or blade, has exceeded a critical temperature, such as a melting point, along any point along the entire surface of the vane or blade. This system can be employed in a conventional combustion turbine having a compressor, a combustor and a turbine section. Included within this system is a chemical coating disposed along the entire interior surface of a vane or blade and a closed loop cooling system that circulates a coolant through the interior of the vane or blade. If the temperature of the vane or blade exceeds a critical temperature, the chemical coating will be expelled from the vane or blade into the coolant. Since while traversing the closed loop cooling system the coolant passes through a detector, the presence of the chemical coating in the coolant will be sensed by the system. If the chemical coating is detected, this indicates that the vane or blade has exceeded a critical temperature. 5 figs.

Twerdochlib, M.

1999-02-02T23:59:59.000Z

338

A Tutorial on Detection and Characterization of Special Behavior in Large Electric Power Systems  

SciTech Connect

The objective of this document is to report results in the detection and characterization of special behavior in large electric power systems. Such behavior is usually dynamic in nature, but not always. This is also true for the underlying sources of special behavior. At the device level, a source of special behavior might be an automatic control system, a dynamic load, or even a manual control system that is operated according to some sharply defined policy. Other possible sources include passive system conditions, such as the state of a switched device or the amount of power carried on some critical line. Detection and characterization are based upon “signature information” that is extracted from the behavior observed. Characterization elements include the signature information itself, the nature of the behavior and its likely causes, and the associated implications for the system or for the public at large. With sufficient data and processing, this characterization may directly identify a particular condition or device at a specific location. Such conclusive results cannot always be done from just one observation, however. Information environments that are very sparse may require multiple observations, comparative model studies, and even direct testing of the system.

Hauer, John F.; DeSteese, John G.

2004-08-20T23:59:59.000Z

339

System and method for bearing fault detection using stator current noise cancellation  

Science Conference Proceedings (OSTI)

A system and method for detecting incipient mechanical motor faults by way of current noise cancellation is disclosed. The system includes a controller configured to detect indicia of incipient mechanical motor faults. The controller further includes a processor programmed to receive a baseline set of current data from an operating motor and define a noise component in the baseline set of current data. The processor is also programmed to repeatedly receive real-time operating current data from the operating motor and remove the noise component from the operating current data in real-time to isolate any fault components present in the operating current data. The processor is then programmed to generate a fault index for the operating current data based on any isolated fault components.

Zhou, Wei (Los Angeles, CA); Lu, Bin (Kenosha, WI); Habetler, Thomas G. (Snellville, GA); Harley, Ronald G. (Lawrenceville, GA); Theisen, Peter J. (West Bend, WI)

2010-08-17T23:59:59.000Z

340

System and method for motor fault detection using stator current noise cancellation  

Science Conference Proceedings (OSTI)

A system and method for detecting incipient mechanical motor faults by way of current noise cancellation is disclosed. The system includes a controller configured to detect indicia of incipient mechanical motor faults. The controller further includes a processor programmed to receive a baseline set of current data from an operating motor and define a noise component in the baseline set of current data. The processor is also programmed to acquire at least on additional set of real-time operating current data from the motor during operation, redefine the noise component present in each additional set of real-time operating current data, and remove the noise component from the operating current data in real-time to isolate any fault components present in the operating current data. The processor is then programmed to generate a fault index for the operating current data based on any isolated fault components.

Zhou, Wei (Los Angeles, CA); Lu, Bin (Kenosha, WI); Nowak, Michael P. (Menomonee Falls, WI); Dimino, Steven A. (Wauwatosa, WI)

2010-12-07T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Microsoft Word - Acoustic Sensor for Pipeline Monitoring_Revised.do  

NLE Websites -- All DOE Office Websites (Extended Search)

LA-UR-05-6025 LA-UR-05-6025 Approved for public release; distribution is unlimited. Title: Acoustic Sensor for Pipeline Monitoring: Technology Report Author(s): Dipen N. Sinha Submitted to: Gas Technology Management Division Strategic Center for Natural Gas and Oil National Energy Technology Laboratory 2 Acoustic Sensor for Pipeline Monitoring: Technology Report Dipen Sinha Los Alamos National Laboratory July 20, 2005 Executive Summary This report presents detailed information on the effort to develop acoustic sensing technologies for natural gas pipe line monitoring. It starts with a historical evolution of the project and ends with the current status. The various technical accomplishments during this effort are pointed out. The latest technique involves the use of Lamb wave propagation in the wall of a pipe generated in a stand-off manner for defect detection. The report presents

342

Acoustic Backscatter from Turbulent Microstructure  

Science Conference Proceedings (OSTI)

Acoustic backscatter has produced spectacular images of internal ocean processes for nearly two decades, but interpretation of the images remains ambiguous because several mechanisms can generate measurable backscatter. The authors present what ...

Harvey E. Seim; Michael C. Gregg; R. T. Miyamoto

1995-04-01T23:59:59.000Z

343

Acoustically Enhanced Boiling Heat Transfer  

E-Print Network (OSTI)

An acoustic field is used to increase the critical heat flux (CHF) of a flat-boiling-heat-transfer surface. The increase is a result of the acoustic effects on the vapor bubbles. Experiments are performed to explore the effects of an acoustic field on vapor bubbles in the vicinity of a rigid-heated wall. Work includes the construction of a novel heater used to produce a single vapor bubble of a prescribed size and at a prescribed location on a flatboiling surface for better study of an individual vapor bubble's reaction to the acoustic field. Work also includes application of the results from the single-bubble heater to a calibrated-copper heater used for quantifying the improvements in CHF.

Z. W. Douglas; M. K. Smith; A. Glezer

2008-01-07T23:59:59.000Z

344

Acoustic analogues of black hole singularities  

SciTech Connect

We search for acoustic analogues of a spherical symmetric black hole with a pointlike source. We show that the gravitational system has a dynamical counterpart in the constrained, steady motion of a fluid with a planar source. The equations governing the dynamics of the gravitational system can be exactly mapped in those governing the motion of the fluid. The different meaning that singularities and sources have in fluid dynamics and in general relativity is also discussed. Whereas in the latter a pointlike source is always associated with a (curvature) singularity in the former the presence of sources does not necessarily imply divergences of the fields.

Cadoni, Mariano; Mignemi, Salvatore [Dipartimento di Fisica, Universita di Cagliari, and INFN, Sezione di Cagliari, Cittadella Universitaria 09042 Monserrato (Italy); Dipartimento di Matematica, Universita di Cagliari, viale Merello 92, 09123 Cagliari, Italy, and INFN, Sezione di Cagliari (Italy)

2005-10-15T23:59:59.000Z

345

Acoustic analogues of black hole singularities  

E-Print Network (OSTI)

We search for acoustic analogues of a spherical symmetric black hole with a pointlike source. We show that the gravitational system has a dynamical counterpart in the constrained, steady motion of a fluid with a planar source. The equations governing the dynamics of the gravitational system can be exactly mapped in those governing the motion of the fluid. The different meaning that singularities and sources have in fluid dynamics and in general relativity is also discussed. Whereas in the latter a pointlike source is always associated with a (curvature) singularity in the former the presence of sources does not necessarily imply divergences of the fields.

Mariano Cadoni; Salvatore Mignemi

2005-04-29T23:59:59.000Z

346

Employing the complete acoustical palette in teleconferencing design  

Science Conference Proceedings (OSTI)

The prevailing architectural acoustics approach in teleconferencing is “Deader is better” or “No acoustics is better than bad acoustics.” In some situations

Peter D'Antonio

1989-01-01T23:59:59.000Z

347

Iterative equalization and decoding applied to underwater acoustic communication  

E-Print Network (OSTI)

1.1 Shallow Underwater Acoustic Channels . . . . . . . .and Decoding Approach for Underwater Acoustic Commu-Equalization and Decoding of Underwater Acoustic Using Array

Sifferlen, James F.

2008-01-01T23:59:59.000Z

348

Method of remote powering and detecting multiple UWB passive tags in an RFID system  

DOE Patents (OSTI)

A new Radio Frequency Identification (RFID), tracking, powering apparatus/system and method using coded Ultra-wideband (UWB) signaling is introduced. The proposed hardware and techniques disclosed herein utilize a plurality of passive UWB transponders in a field of an RFID-radar system. The radar system itself enables multiple passive tags to be remotely powered (activated) at about the same time frame via predetermined frequency UWB pulsed formats. Once such tags are in an activated state, an UWB radar transmits specific "interrogating codes" to put predetermined tags in an awakened status. Such predetermined tags can then communicate by a unique "response code" so as to be detected by an UWB system using radar methods.

Dowla, Farid U. (Castro Valley, CA); Nekoogar, Faranak (San Ramon, CA); Benzel, David M. (Livermore, CA); Dallum, Gregory E. (Livermore, CA); Spiridon, Alex (Palo Alto, CA)

2012-05-29T23:59:59.000Z

349

Cross-Dipole Acoustic Log At Alum Area (Moos & Ronne, 2010) | Open Energy  

Open Energy Info (EERE)

Dipole Acoustic Log At Alum Area (Moos & Ronne, 2010) Dipole Acoustic Log At Alum Area (Moos & Ronne, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Cross-Dipole Acoustic Log At Alum Geothermal Area (Moos & Ronne, 2010) Exploration Activity Details Location Alum Geothermal Area Exploration Technique Cross-Dipole Acoustic Log Activity Date Usefulness useful DOE-funding Unknown Notes A crossed-dipole acoustic log detected stress induced anisotropy in the sediments, and also appeared to be able to identify and orient steeply dipping, compliant and therefore possibly conductive fractures in basement rocks. Because the shear-wave velocity was extremely low throughout most of the sedimentary section dipole data was required for its determination. The analysis results, which included a stress determination based on an

350

Feasibility of detecting artificial magnetic anomalies in hydrofractured rock by superconducting gradiometer-SQUID systems  

DOE Green Energy (OSTI)

A study of the signal physics of magnetic anomaly detection by superconducting gradiometer-SQUID systems to determine the feasibility of possible applications to the geothermal energy program is described. The system would make full use of the incredible sensitivity of the superconducting quantum interference device (SQUID) which can be in the range of 10/sup -11/ Oe. In addition to magnetic anomalies in the earth's field produced by spherical distributions of magnetic matter, anomalies that would be artificially produced by flooding magnetic material into cracks produced by hydrofracturing in deep boreholes drilled into dry rock geothermal sources are considered. The study indicates that surface detection by horizontal and vertical gradiometers of crack anomalies will not be feasible if the magnetic material flooding the crack is a paramagnetic solution. However, one can concoct a slurry to carry prepolarized ferromagnetic particles of a size sufficiently large to permit domain formation but small enough to permit rotation and alignment in the earth's field. In this case, the anomaly signal is large enough to permit extraction of anomaly orientation information out of the background of magnetic noise and earth's field gradients. The superconducting gradiometer-SQUID system is shown to be exceptional in its capability of removing undesirable magnetic noise and gradients. The greatest promise was found in systems that would be comprised of a magnetometer or gradiometer that could be lowered into the borehole to positions opposite the formations cracked by hydrofracturing. The use of a paramagnetic material to produce the artificial anomaly will not provide signals of sufficient amplitude to overcome the magnetic noise. However, the slurry containing only one percent by volume of ferromagnetic particles will produce a crack anomaly that is easily detectable by magnetometer or by the superconducting gradiometer-SQUID system.

Overton, W.C. Jr.

1976-12-01T23:59:59.000Z

351

An active system for the detection of special fissile material in small watercraft  

E-Print Network (OSTI)

Due to increasing terrorist threats and illegal proliferation of nuclear material and technology, there is a need for increased research in the area of detection of smuggled fissile material, some of which is designated by the International Atomic Energy Agency as special fissile material. This thesis focuses on a hypothetical scenario in which a terrorist organization has managed to smuggle an amount of special fissile material onto a personal recreational watercraft and sail it into a marina. If the boat could be forced to go through a detector system, then the contents could be interrogated and a determination made of whether any special fissile material was aboard. This thesis examines the hypothesis that active interrogation may be used successfully in the detection of special fissile material in such an environment. It shows that it is feasible to use an active neutron system to detect a significant quantity of special fissile material onboard a small boat via the differential dieaway technique. The MCNP Monte Carlo transport code was used to simulate the use of a pulsed neutron generator to induce fission in the fissile material and then estimate the detector response. The detector modeled was based on elastic scattering-induced recoil protons using pure hydrogen gas. There was a significant difference between the system with and without the presence of fissile material, and the estimated detector response for the system with fissile material present was shown to be sufficiently greater than the response due to background radiation only. Additionally, dose was estimated and found to be small enough that the system would not likely pose a significant radiological health risk to passengers on the boat.

Johansen, Norman Alfan, III

2006-08-01T23:59:59.000Z

352

Development and Testing of an Air Fluorescence Imaging System for the Detection of Radiological Contamination  

SciTech Connect

Detection of radionuclides emitting short-range radiation, such as {alpha} and low-energy {beta} particles, has always presented a challenge, particularly when such radionuclides are dispersed over a wide area. In this situation, conventional detection methods require the area of interest to be surveyed using a fragile probe at very close range--a slow, error-prone, and potentially dangerous process that may take many hours for a single room. The instrument under development uses a novel approach by imaging radiation-induced fluorescence in the air surrounding a contaminated area, rather than detecting the radiation directly. A robust and portable system has been designed and built that will allow contaminated areas to be rapidly detected and delineated. The detector incorporates position-sensitive photo-multiplier tubes, UV filters, a fast electronic shutter and an aspherical phase mask that significantly increases the depth-of-field. Preliminary tests have been conducted using sealed {sup 241}Am sources of varying activities and surface areas. The details of the instrument design will be described and the results of recent testing will be presented.

Inrig, Elizabeth [Defence R and D Canada - Ottawa, 3701 Carling Avenue, Ottawa, Ontario (Canada); Koslowsky, Vern; Andrews, Bob; Dick, Michael; Forget, Patrick; Ing, Harry [Bubble Technology Industries, Box 100, Chalk River, Ontario (Canada); Hugron, Roger [Director General Nuclear Safety, 101 Colonel By Drive, Ottawa, Ontario (Canada); Wong, Larry [Canadian Nuclear Safety Commission, 3484 Limebank Road, Ottawa, Ontario (Canada)

2011-12-13T23:59:59.000Z

353

Processing dipole acoustic logging data to image fracture network in shale gas reservoirs  

Science Conference Proceedings (OSTI)

A recent advance in borehole remote acoustic reflection imaging is the utilization of a dipole acoustic system in a borehole to emit and receive elastic waves to and from a remote geologic reflector in formation. An important application of this new technique is the delineation of fracture network in shale gas reservoirs

Zhuang Chunxi; Su Yuanda; Tang Xiaoming

2012-01-01T23:59:59.000Z

354

Neutronic analysis of the 1D and 1E banks reflux detection system  

Science Conference Proceedings (OSTI)

Two H Canyon neutron monitoring systems for early detection of postulated abnormal reflux conditions in the Second Uranium Cycle 1E and 1D Mixer-Settle Banks have been designed and built. Monte Carlo neutron transport simulations using the general purpose, general geometry, n-particle MCNP code have been performed to model expected response of the monitoring systems to varying conditions.The confirmatory studies documented herein conclude that the 1E and 1D neutron monitoring systems are able to achieve adequate neutron count rates for various neutron source and detector configurations, thereby eliminating excessive integration count time. Neutron count rate sensitivity studies are also performed. Conversely, the transport studies concluded that the neutron count rates are statistically insensitive to nitric acid content in the aqueous region and to the transition region length. These studies conclude that the 1E and 1D neutron monitoring systems are able to predict the postulated reflux conditions for all examined perturbations in the neutron source and detector configurations. In the cases examined, the relative change in the neutron count rates due to postulated transitions from normal {sup 235}U concentration levels to reflux levels remain satisfactory detectable.

Blanchard, A.

1999-12-21T23:59:59.000Z

355

Near-Surface CO2 Monitoring And Analysis To Detect Hidden Geothermal Systems  

DOE Green Energy (OSTI)

''Hidden'' geothermal systems are systems devoid of obvious surface hydrothermal manifestations. Emissions of moderate-to-low solubility gases may be one of the primary near-surface signals from these systems. We investigate the potential for CO2 detection and monitoring below and above ground in the near-surface environment as an approach to exploration targeting hidden geothermal systems. We focus on CO2 because it is the dominant noncondensible gas species in most geothermal systems and has moderate solubility in water. We carried out numerical simulations of a CO2 migration scenario to calculate the magnitude of expected fluxes and concentrations. Our results show that CO2 concentrations can reach high levels in the shallow subsurface even for relatively low geothermal source CO2 fluxes. However, once CO2 seeps out of the ground into the atmospheric surface layer, winds are effective at dispersing CO2 seepage. In natural ecological systems in the absence of geothermal gas emissions, near-surface CO2 fluxes and concentrations are predominantly controlled by CO2 uptake by photosynthesis, production by root respiration, microbial decomposition of soil/subsoil organic matter, groundwater degassing, and exchange with the atmosphere. Available technologies for monitoring CO2 in the near-surface environment include the infrared gas analyzer, the accumulation chamber method, the eddy covariance method, hyperspectral imaging, and light detection and ranging. To meet the challenge of detecting potentially small-magnitude geothermal CO2 emissions within the natural background variability of CO2, we propose an approach that integrates available detection and monitoring techniques with statistical analysis and modeling strategies. The proposed monitoring plan initially focuses on rapid, economical, reliable measurements of CO2 subsurface concentrations and surface fluxes and statistical analysis of the collected data. Based on this analysis, are as with a high probability of containing geothermal CO2 anomalies can be further sampled and analyzed using more expensive chemical and isotopic methods. Integrated analysis of all measurements will determine definitively if CO2 derived from a deep geothermal source is present, and if so, the spatial extent of the anomaly. The suitability of further geophysical measurements, installation of deep wells, and geochemical analyses of deep fluids can then be determined based on the results of the near surface CO2 monitoring program.

Lewicki, Jennifer L.; Oldenburg, Curtis M.

2005-01-19T23:59:59.000Z

356

System and method to create three-dimensional images of non-linear acoustic properties in a region remote from a borehole  

SciTech Connect

In some aspects of the disclosure, a method for creating three-dimensional images of non-linear properties and the compressional to shear velocity ratio in a region remote from a borehole using a conveyed logging tool is disclosed. In some aspects, the method includes arranging a first source in the borehole and generating a steered beam of elastic energy at a first frequency; arranging a second source in the borehole and generating a steerable beam of elastic energy at a second frequency, such that the steerable beam at the first frequency and the steerable beam at the second frequency intercept at a location away from the borehole; receiving at the borehole by a sensor a third elastic wave, created by a three wave mixing process, with a frequency equal to a difference between the first and second frequencies and a direction of propagation towards the borehole; determining a location of a three wave mixing region based on the arrangement of the first and second sources and on properties of the third wave signal; and creating three-dimensional images of the non-linear properties using data recorded by repeating the generating, receiving and determining at a plurality of azimuths, inclinations and longitudinal locations within the borehole. The method is additionally used to generate three dimensional images of the ratio of compressional to shear acoustic velocity of the same volume surrounding the borehole.

Vu, Cung; Nihei, Kurt T.; Schmitt, Denis P.; Skelt, Christopher; Johnson, Paul A.; Guyer, Robert; TenCate, James A.; Le Bas, Pierre-Yves

2013-01-01T23:59:59.000Z

357

Performance and Calibration of an Acoustic Doppler Current Profiler Towed below the Surface  

Science Conference Proceedings (OSTI)

A towed acoustic Doppler current profiler (ADCP) system was tested. The instrument was deployed from ships of opportunity and towed at depths between 5 and 25 m. The towed system carries upward- and downward-looking ADCPs. The instrument platform ...

Andreas Münchow; Charles S. Coughran; Myrl C. Hendershott; Clinton D. Winant

1995-04-01T23:59:59.000Z

358

Optical methods and systems for detecting a constituent in a gas containing oxygen in harsh environments  

DOE Patents (OSTI)

A method for detecting a gas phase constituent such as carbon monoxide, nitrogen dioxide, hydrogen, or hydrocarbons in a gas comprising oxygen such as air, includes providing a sensing material or film having a metal embedded in a catalytically active matrix such as gold embedded in a yttria stabilized zirconia (YSZ) matrix. The method may include annealing the sensing material at about 900.degree. C., exposing the sensing material and gas to a temperature above 400.degree. C., projecting light onto the sensing material, and detecting a change in the absorption spectrum of the sensing material due to the exposure of the sensing material to the gas in air at the temperature which causes a chemical reaction in the sensing material compared to the absorption spectrum of the sensing material in the absence of the gas. Systems employing such a method are also disclosed.

Carpenter, Michael A. (Scotia, NY); Sirinakis, George (Bronx, NY)

2011-01-04T23:59:59.000Z

359

A Qualitive Modeling Approach for Fault Detection and Diagnosis on HVAC Systems  

E-Print Network (OSTI)

This paper describes the basics and first test results of a model based approach using qualitative modeling to perform Fault Detection and Diagnostics (FDD) on HVAC and R systems. A quantized system describing the qualitative behavior of a dynamical system is established by transforming numerical inputs into qualitative values or states. Then, the qualitative model is used to determine system-states or outputs that may occur in the future. The qualitative model determines the probability that a subsequent condition might occur. The model can then be used for FDD purposes by comparing the expected states of the faultless system with the occurring states of the real process. The paper presents the first results of the model, trained with measurement data of an air handling unit (AHU) heating coil. The authors plan to extend the model to further AHU components and to test them against real data to assess their performance for FDD and their economic viability in terms of engineering efforts and costs by comparing them with a rule-based FDD system. It is then planned to implement and test the models on several large HVAC and R systems operating at two major European airports in the framework of the FP7 European project CASCADE ICT for Energy Efficient Airports.

Muller, T.; Rehault, N.; Rist, T.

2013-01-01T23:59:59.000Z

360

DEVELOPMENT OF DEPOSIT DETECTION SYSTEM IN PIPELINES OF THE STEELWORKS USING CS-137 GAMMA-RAY  

SciTech Connect

The deposit is built up in the pipeline of the steelworks by the chemical reaction among COG (coke oven gas), BFG (blast furnace gas), moisture, and steel in the high temperature environment and obstructs the smooth gas flow. In this study a gamma-ray system is developed to detect the deposit accumulated in pipelines and calculate the accumulation rate with respect to the cross section area of pipes. Cs-137 is used as the gamma-ray source and the system is designed to apply to pipes of various diameters. This system also includes the DB for storage and display of the measurement results so that it can be used for the efficient management of the pipelines.

Song, Won-Joon; Lee, Seung-Hee; Jeong, Hee-Dong [Research Institute of Industrial Science and Technology, 32 Hyoja-Dong, Nam-Ku, Pohang, 790-330 (Korea, Republic of)

2008-02-28T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Environmental assessment of the thermal neutron activation explosive detection system for concourse use at US airports  

SciTech Connect

This document is an environmental assessment of a system designed to detect the presence of explosives in checked airline baggage or cargo. The system is meant to be installed at the concourse or lobby ticketing areas of US commercial airports and uses a sealed radioactive source of californium-252 to irradiate baggage items. The major impact of the use of this system arises from direct exposure of the public to scattered or leakage radiation from the source and to induced radioactivity in baggage items. Under normal operation and the most likely accident scenarios, the environmental impacts that would be created by the proposed licensing action would not be significant. 44 refs., 19 figs., 18 tabs.

Jones, C.G.

1990-08-01T23:59:59.000Z

362

Strategies for Detecting Hidden Geothermal Systems by Near-Surface Gas Monitoring  

DOE Green Energy (OSTI)

''Hidden'' geothermal systems are those systems above which hydrothermal surface features (e.g., hot springs, fumaroles, elevated ground temperatures, hydrothermal alteration) are lacking. Emissions of moderate to low solubility gases (e.g., CO2, CH4, He) may be one of the primary near-surface signals from these systems. Detection of anomalous gas emissions related to hidden geothermal systems may therefore be an important tool to discover new geothermal resources. This study investigates the potential for CO2 detection and monitoring in the subsurface and above ground in the near-surface environment to serve as a tool to discover hidden geothermal systems. We focus the investigation on CO2 due to (1) its abundance in geothermal systems, (2) its moderate solubility in water, and (3) the wide range of technologies available to monitor CO2 in the near-surface environment. However, monitoring in the near-surface environment for CO2 derived from hidden geothermal reservoirs is complicated by the large variation in CO2 fluxes and concentrations arising from natural biological and hydrologic processes. In the near-surface environment, the flow and transport of CO2 at high concentrations will be controlled by its high density, low viscosity, and high solubility in water relative to air. Numerical simulations of CO2 migration show that CO2 concentrations can reach very high levels in the shallow subsurface even for relatively low geothermal source CO2 fluxes. However, once CO2 seeps out of the ground into the atmospheric surface layer, surface winds are effective at dispersing CO2 seepage. In natural ecological systems in the absence of geothermal gas emissions, near-surface CO2 fluxes and concentrations are primarily controlled by CO2 uptake by photosynthesis, production by root respiration, and microbial decomposition of soil/subsoil organic matter, groundwater degassing, and exchange with the atmosphere. Available technologies for monitoring CO2 in the near-surface environment include (1) the infrared gas analyzer (IRGA) for measurement of concentrations at point locations, (2) the accumulation chamber (AC) method for measuring soil CO2 fluxes at point locations, (3) the eddy covariance (EC) method for measuring net CO2 flux over a given area, (4) hyperspectral imaging of vegetative stress resulting from elevated CO2 concentrations, and (5) light detection and ranging (LIDAR) that can measure CO2 concentrations over an integrated path. Technologies currently in developmental stages that have the potential to be used for CO2 monitoring include tunable lasers for long distance integrated concentration measurements and micro-electronic mechanical systems (MEMS) that can make widespread point measurements. To address the challenge of detecting potentially small-magnitude geothermal CO2 emissions within the natural background variability of CO2, we propose an approach that integrates available detection and monitoring methodologies with statistical analysis and modeling strategies. Within the area targeted for geothermal exploration, point measurements of soil CO2 fluxes and concentrations using the AC method and a portable IRGA, respectively, and measurements of net surface flux using EC should be made. Also, the natural spatial and temporal variability of surface CO2 fluxes and subsurface CO2 concentrations should be quantified within a background area with similar geologic, climatic, and ecosystem characteristics to the area targeted for geothermal exploration. Statistical analyses of data collected from both areas should be used to guide sampling strategy, discern spatial patterns that may be indicative of geothermal CO2 emissions, and assess the presence (or absence) of geothermal CO2 within the natural background variability with a desired confidence level. Once measured CO2 concentrations and fluxes have been determined to be of anomalous geothermal origin with high confidence, more expensive vertical subsurface gas sampling and chemical and isotopic analyses can be undertaken. Integrated analysis of all measurements will d

Lewicki, Jennifer L.; Oldenburg, Curtis M.

2004-12-15T23:59:59.000Z

363

Integrated optical systems for excitation delivery and broadband detection in micro-fluidic electrochromatography  

SciTech Connect

The authors have designed and assembled two generations of integrated micro-optical systems that deliver pump light and detect broadband laser-induced fluorescence in micro-fluidic chemical separation systems employing electrochromatography. The goal is to maintain the sensitivity attainable with larger, tabletop machines while decreasing package size and increasing throughput (by decreasing the required chemical volume). One type of micro-optical system uses vertical-cavity surface-emitting lasers (VCSELs) as the excitation source. Light from the VCSELs is relayed with four-level surface relief diffractive optical elements (DOEs) and delivered to the chemical volume through substrate-mode propagation. Indirect fluorescence from dye-quenched chemical species is collected and collimated with a high numerical aperture DOE. A filter blocks the excitation wavelength, and the resulting signal is detected as the chemical separation proceeds. Variations of this original design include changing the combination of reflective and transmissive DOEs and optimizing the high numerical aperture DOE with a rotationally symmetric iterative discrete on-axis algorithm. The authors will discuss the results of these implemented optimizations.

KEMME,SHANALYN A.; WARREN,MIAL E.; SWEATT,WILLIAM C.; WENDT,JOEL R.; BAILEY,CHRISTOPHER G.; MATZKE,CAROLYN M.; ALLERMAN,ANDREW A.; ARNOLD,DON W.; CARTER,TONY RAY; ASBILL,RANDOLPH E.; SAMORA,SALLY

2000-03-15T23:59:59.000Z

364

A prototype system for detecting the radio-frequency pulse associated with cosmic ray air showers  

E-Print Network (OSTI)

The development of a system to detect the radio-frequency (RF) pulse associated with extensive air showers of cosmic rays is described. This work was performed at the CASA/MIA array in Utah, with the intention of designing equipment that can be used in conjunction with the Auger Giant Array. A small subset of data (less than 40 out of a total of 600 hours of running time), taken under low-noise conditions, permitted upper limits to be placed on the rate for pulses accompanying showers of energies around $10^{17}$ eV.

Kevin Green; Jonathan L. Rosner; Denis A. Suprun; J. F. Wilkerson

2002-05-03T23:59:59.000Z

365

Radioactive Flow Characterization for Real-Time Detection Systems in UREX+ Nuclear Fuel Reprocessing  

E-Print Network (OSTI)

The reprocessing of used nuclear fuel requires the dissolution and separation of numerous radioisotopes that are present as fission products in the fuel. The leading technology option in the U.S. for reprocessing is a sequence of processing methods known as UREX+ (Uranium Extraction ). However, an industrial scale facility implementing this separation procedure will require the establishment of safeguards and security systems to ensure the protection of the separated materials. A number of technologies have been developed for meeting the measurement demands for such a facility. This project focuses on the design of a gamma detection system for taking measurements of the flow streams of such a reprocessing facility. An experimental apparatus was constructed capable of pumping water spiked with soluble radioisotopes under various flow conditions through a stainless steel coil around a sodium iodide (NaI) detector system. Experiments were conducted to characterize the impact of flow rate, pipe air voids, geometry, and radioactivity dilution level on activity measurements and gamma energy spectra. Two coil geometries were used for these experiments, using 0.5 in stainless steel pipe wound into a coil with a 6 inch diameter; the first coil was 5.5 revolutions tall and the second coil was 9.5 revolutions tall. The isotopes dissolved in the flowing water were produced at the Texas A&M Nuclear Science Center via neutron activation of chromium, gold, cerium, and ytterbium nitrate salts. After activation, the salts were dissolved in distilled water and inserted into the radioactive flow assembly for quantitative measurements. Flow rate variations from 100 to 2000 ml/min were used and activity dilution levels for the experiments conducted were between 0.02 and 1.6 ?Ci/liter. Detection of system transients was observed to improve with decreasing flow rate. The detection limits observed for this system were 0.02 ?Ci/liter over background, 0.5% total activity change in a pre-spiked system, and a dilution change of 2% of the coil volume. MCNP (Monte Carlo N-Particle Transport) models were constructed to simulate the results and were used to extend the results to other geometries and piping materials as well as simulate actual UREX stream material in the system. The stainless steel piping for the flow around the detector was found to attenuate key identifying gamma peaks on the low end of the energy spectrum. For the proposed schedule 40 stainless steel pipe for an actual reprocessing facility, gamma rays below 100 keV in energy would be reduced to less than half their initial intensities. The exact ideal detection set up is largely activity and flow stream dependant. However, the characteristics best suited for flow stream detection are: 1) minimize volume around detector, 2) low flow rate for long count times, and 3) low attenuation piping material such as glass.

Hogelin, Thomas Russell

2010-12-01T23:59:59.000Z

366

System for detecting and limiting electrical ground faults within electrical devices  

DOE Patents (OSTI)

An electrical ground fault detection and limitation system for employment with a nuclear reactor utilizing a liquid metal coolant. Elongate electromagnetic pumps submerged within the liquid metal coolant and electrical support equipment experiencing an insulation breakdown occasion the development of electrical ground fault current. Without some form of detection and control, these currents may build to damaging power levels to expose the pump drive components to liquid metal coolant such as sodium with resultant undesirable secondary effects. Such electrical ground fault currents are detected and controlled through the employment of an isolated power input to the pumps and with the use of a ground fault control conductor providing a direct return path from the affected components to the power source. By incorporating a resistance arrangement with the ground fault control conductor, the amount of fault current permitted to flow may be regulated to the extent that the reactor may remain in operation until maintenance may be performed, notwithstanding the existence of the fault. Monitors such as synchronous demodulators may be employed to identify and evaluate fault currents for each phase of a polyphase power, and control input to the submerged pump and associated support equipment.

Gaubatz, Donald C. (Cupertino, CA)

1990-01-01T23:59:59.000Z

367

Opto-acoustic transducer for medical applications  

DOE Patents (OSTI)

This invention is an optically activated transducer for generating acoustic vibrations in a biological medium. The transducer is located at the end of a fiber optic which may be located within a catheter. Energy for operating the transducer is provided optically by laser light transmitted through the fiber optic to the transducer. Pulsed laser light is absorbed in the working fluid of the transducer to generate a thermal pressure and consequent adiabatic expansion of the transducer head such that it does work against the ambient medium. The transducer returns to its original state by a process of thermal cooling. The motion of the transducer within the ambient medium couples acoustic energy into the medium. By pulsing the laser at a high repetition rate (which may vary from CW to 100 kHz) an ultrasonic radiation field can be established locally in the medium. This method of producing ultrasonic vibrations can be used in vivo for the treatment of stroke-related conditions in humans, particularly for dissolving thrombus. The catheter may also incorporate anti-thrombolytic drug treatments as an adjunct therapy and it may be operated in conjunction with ultrasonic detection equipment for imaging and feedback control.

Benett, William (Livermore, CA); Celliers, Peter (Berkeley, CA); Da Silva, Luiz (Danville, CA); Glinsky, Michael (Livermore, CA); London, Richard (Orinda, CA); Maitland, Duncan (Livermore, CA); Matthews, Dennis (Moss Beach, CA); Krulevich, Peter (Pleasanton, CA); Lee, Abraham (Walnut Creek, CA)

1999-01-01T23:59:59.000Z

368

Opto-acoustic transducer for medical applications  

DOE Patents (OSTI)

This invention is an optically activated transducer for generating acoustic vibrations in a biological medium. The transducer is located at the end of a fiber optic which may be located within a catheter. Energy for operating the transducer is provided optically by laser light transmitted through the fiber optic to the transducer. Pulsed laser light is absorbed in the working fluid of the transducer to generate a thermal pressure and consequent adiabatic expansion of the transducer head such that it does work against the ambient medium. The transducer returns to its original state by a process of thermal cooling. The motion of the transducer within the ambient medium couples acoustic energy into the medium. By pulsing the laser at a high repetition rate (which may vary from CW to 100 kHz) an ultrasonic radiation field can be established locally in the medium. This method of producing ultrasonic vibrations can be used in vivo for the treatment of stroke-related conditions in humans, particularly for dissolving thrombus. The catheter may also incorporate anti-thrombolytic drug treatments as an adjunct therapy and it may be operated in conjunction with ultrasonic detection equipment for imaging and feedback control.

Benett, William (Livermore, CA); Celliers, Peter (Berkeley, CA); Da Silva, Luiz (Danville, CA); Glinsky, Michael (Livermore, CA); London, Richard (Orinda, CA); Maitland, Duncan (Livermore, CA); Matthews, Dennis (Moss Beach, CA); Krulevich, Peter (Pleasanton, CA); Lee, Abraham (Walnut Creek, CA)

2002-01-01T23:59:59.000Z

369

Opto-acoustic transducer for medical applications  

Science Conference Proceedings (OSTI)

This invention is an optically activated transducer for generating acoustic vibrations in a biological medium. The transducer is located at the end of a fiber optic which may be located within a catheter. Energy for operating the transducer is provided optically by laser light transmitted through the fiber optic to the transducer. Pulsed laser light is absorbed in the working fluid of the transducer to generate a thermal pressure and consequent adiabatic expansion of the transducer head such that it does work against the ambient medium. The transducer returns to its original state by a process of thermal cooling. The motion of the transducer within the ambient medium couples acoustic energy into the medium. By pulsing the laser at a high repetition rate (which may vary from CW to 100 kHz) an ultrasonic radiation field can be established locally in the medium. This method of producing ultrasonic vibrations can be used in vivo for the treatment of stroke-related conditions in humans, particularly for dissolving thrombus. The catheter may also incorporate anti-thrombolytic drug treatments as an adjunct therapy and it may be operated in conjunction with ultrasonic detection equipment for imaging and feedback control. 7 figs.

Benett, W.; Celliers, P.; Da Silva, L.; Glinsky, M.; London, R.; Maitland, D.; Matthews, D.; Krulevich, P.; Lee, A.

1999-08-31T23:59:59.000Z

370

Resistively-Detected NMR Studies of Quantum Hall Systems Katsuyoshi Kodera, Hisashi Takado, Akira Endo, Yoshiaki Hashimoto, Shingo  

E-Print Network (OSTI)

Resistively-Detected NMR Studies of Quantum Hall Systems Katsuyoshi Kodera, Hisashi Takado, Akira, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581 Abstract. The resistively-detected NMR. The NMR lineshape in this region exhibits a dip-peak structure (dispersive lineshape). The anomalous

Katsumoto, Shingo

371

The Design of Acoustic Radar Baffles  

Science Conference Proceedings (OSTI)

Compact acoustic antenna arrays, commonly used for profiling urban atmospheres, usually require acoustic baffles to minimize reflections from hard objects and to limit the impact of the 2–6-kHz signals on inhabitants. To facilitate optimum ...

C. J. Werkhoven; S. G. Bradley

1997-06-01T23:59:59.000Z

372

Acoustic data transmission through a drill string  

DOE Patents (OSTI)

Acoustical signals are transmitted through a drill string by canceling upward moving acoustical noise and by preconditioning the data in recognition of the comb filter impedance characteristics of the drill string. 5 figs.

Drumheller, D.S.

1988-04-21T23:59:59.000Z

373

Towards automatic power line detection for a UAV surveillance system using pulse coupled neural filter and an improved Hough transform  

Science Conference Proceedings (OSTI)

Spatial information captured from optical remote sensors on board unmanned aerial vehicles (UAVs) has great potential in automatic surveillance of electrical infrastructure. For an automatic vision-based power line inspection system, detecting power ... Keywords: Hough transform, Knowledge-based system, Power line inspection system, Pulse coupled neural filter, Unmanned aerial vehicles (UAVs)

Zhengrong Li; Yuee Liu; Rodney Walker; Ross Hayward; Jinglan Zhang

2010-08-01T23:59:59.000Z

374

Characterizing, synthesizing, and/or canceling out acoustic signals from sound sources  

DOE Patents (OSTI)

A system for characterizing, synthesizing, and/or canceling out acoustic signals from inanimate and animate sound sources. Electromagnetic sensors monitor excitation sources in sound producing systems, such as animate sound sources such as the human voice, or from machines, musical instruments, and various other structures. Acoustical output from these sound producing systems is also monitored. From such information, a transfer function characterizing the sound producing system is generated. From the transfer function, acoustical output from the sound producing system may be synthesized or canceled. The systems disclosed enable accurate calculation of transfer functions relating specific excitations to specific acoustical outputs. Knowledge of such signals and functions can be used to effect various sound replication, sound source identification, and sound cancellation applications.

Holzrichter, John F. (Berkeley, CA); Ng, Lawrence C. (Danville, CA)

2007-03-13T23:59:59.000Z

375

Acoustic Logs | Open Energy Information  

Open Energy Info (EERE)

Acoustic Logs Acoustic Logs Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Acoustic Logs Details Activities (7) Areas (6) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Log Techniques Parent Exploration Technique: Well Log Techniques Information Provided by Technique Lithology: determine porosity of layers Stratigraphic/Structural: map discontinuities to determine their orientation. Hydrological: Thermal: Cost Information Low-End Estimate (USD): 1.00100 centUSD 1.0e-3 kUSD 1.0e-6 MUSD 1.0e-9 TUSD / foot Median Estimate (USD): 4.62462 centUSD 0.00462 kUSD 4.62e-6 MUSD 4.62e-9 TUSD / foot High-End Estimate (USD): 16.001,600 centUSD 0.016 kUSD 1.6e-5 MUSD 1.6e-8 TUSD / foot

376

Development of an acoustic sensor for a geothermal borehole televiewer  

DOE Green Energy (OSTI)

The objective of this project is to upgrade acoustic sensor technology such that appropriate well logging instruments can be made to operate under the hostile environment conditions anticipated in geothermal resource exploration and evaluation. The Borehole Televiewer (BHTV) was selected as the vehicle for this sensor improvement work, primarily because of its demonstrated ability to detect and characterize fractures under sub-geothermal conditions. The work done toward providing an improved sensor for the televiewer is described. An experimental sensor concept was devised, incorporating a thin metal acoustic window, an improved, high-temperature internal coupling fluid, and thermally resistant sensor internals. During an autoclave test, it was successfully demonstrated that the resulting experimental sensor design concept provides the basic target detection and characterization functions required of a fracture mapping, Borehole Televiewer under simulated geothermal conditions. In particular, the experimental sensor remained operational at 275/sup 0/C and 7000 psi.

Wonn, J.W.

1979-03-01T23:59:59.000Z

377

Development of an acoustic sensor for a geothermal Borehole Televiewer  

DOE Green Energy (OSTI)

The objective of this project is to upgrade acoustic sensor technology such that appropriate well logging instruments can be made to operate under the hostile environment conditions anticipated in geothermal resource exploration and evaluation. The Borehole Televiewer (BHTV) was selected as the vehicle for this sensor improvement work, primarily because of its demonstrated ability to detect and characterize fractures under sub-geothermal conditions. The work done toward providing an improved sensor for the televiewer is described. An experimental sensor concept was devised, incorporating a thin metal acoustic window, an improved, high-temperature internal coupling fluid, and thermally resistant sensor internals. During an autoclave test, it was successfully demonstrated that the resulting experimental sensor design concept provides the basic target detection and characterization functions required of a fracture mapping, Borehole Televiewer under simulated geothermal conditions. In particular, the experimental sensor remained operational at 275/sup 0/C and 7000 psi.

Wonn, J.W.

1979-03-01T23:59:59.000Z

378

Detecting and Attributing External Influences on the Climate System: A Review of Recent Advances  

SciTech Connect

We review recent research that assesses evidence for the detection of anthropogenic and natural external influences on the climate. Externally driven climate change has been detected by a number of investigators in independent data covering many parts of the climate system, including surface temperature on global and large regional scales, ocean-heat content, atmospheric circulation, and variables of the free atmosphere, such as atmospheric temperature and tropopause height. The influence of external forcing is also clearly discernible in reconstructions of hemispheric scale temperature of the last millennium. These observed climate changes are very unlikely to be due only to natural internal climate variability, and they are consistent with the responses to anthropogenic and natural external forcing of the climate system that are simulated with climate models. The evidence indicates that natural drivers such as solar variability and volcanic activity are at most partially responsible for the large-scale temperature changes observed over the past century, and that a large fraction of the warming over the last 50 years can be attributed to greenhouse gas increases. Thus the recent research supports and strengthens the IPCC Third Assessment Report conclusion that ''most of the global warming over the past 50 years is likely due to the anthropogenic increase in greenhouse gases''.

Barnett, T; Zwiers, F; Hegerl, G; Allen, M; Crowley, T; Gillett, N; Hasselmann, K; Jones, P; Santer, B; Schnur, R; Stott, P; Taylor, K; Tett, S

2005-01-26T23:59:59.000Z

379

FERMI LAT PULSED DETECTION OF PSR J0737-3039A IN THE DOUBLE PULSAR SYSTEM  

SciTech Connect

We report the Fermi Large Area Telescope discovery of {gamma}-ray pulsations from the 22.7 ms pulsar A in the double pulsar system J0737-3039A/B. This is the first mildly recycled millisecond pulsar (MSP) detected in the GeV domain. The 2.7 s companion object PSR J0737-3039B is not detected in {gamma} rays. PSR J0737-3039A is a faint {gamma}-ray emitter, so that its spectral properties are only weakly constrained; however, its measured efficiency is typical of other MSPs. The two peaks of the {gamma}-ray light curve are separated by roughly half a rotation and are well offset from the radio and X-ray emission, suggesting that the GeV radiation originates in a distinct part of the magnetosphere from the other types of emission. From the modeling of the radio and the {gamma}-ray emission profiles and the analysis of radio polarization data, we constrain the magnetic inclination {alpha} and the viewing angle {zeta} to be close to 90 Degree-Sign , which is consistent with independent studies of the radio emission from PSR J0737-3039A. A small misalignment angle between the pulsar's spin axis and the system's orbital axis is therefore favored, supporting the hypothesis that pulsar B was formed in a nearly symmetric supernova explosion as has been discussed in the literature already.

Guillemot, L.; Kramer, M. [Max-Planck-Institut fuer Radioastronomie, Auf dem Huegel 69, D-53121 Bonn (Germany); Johnson, T. J. [National Research Council Research Associate, National Academy of Sciences, Washington, DC 20001 (United States); Craig, H. A.; Romani, R. W.; Kerr, M. [W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States); Venter, C. [Centre for Space Research, North-West University, Potchefstroom Campus, Private Bag X6001, 2520 Potchefstroom (South Africa); Harding, A. K. [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Ferdman, R. D. [Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, M13 9PL (United Kingdom); Stairs, I. H., E-mail: guillemo@mpifr-bonn.mpg.de [Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1 (Canada)

2013-05-10T23:59:59.000Z

380

Particle analysis in an acoustic cytometer  

SciTech Connect

The present invention is a method and apparatus for acoustically manipulating one or more particles. Acoustically manipulated particles may be separated by size. The particles may be flowed in a flow stream and acoustic radiation pressure, which may be radial, may be applied to the flow stream. This application of acoustic radiation pressure may separate the particles. In one embodiment, the particles may be separated by size, and as a further example, the larger particles may be transported to a central axis.

Kaduchak, Gregory; Ward, Michael D

2012-09-18T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Owens Corning Acoustic & Insulation Product Testing ...  

Science Conference Proceedings (OSTI)

... Insulation. [01/T10] ASTM C687 Thermal Resistance of Loose-Fill Building Insulation. Acoustical Testing Services. Accreditation ...

2014-01-03T23:59:59.000Z

382

Dust Acoustic Shock Waves in Adiabatic Hot Dusty Plasmas  

Science Conference Proceedings (OSTI)

It is known that to have a monotonic or oscillatory shock wave a source of dissipation is needed. In this study, we considered the dust charge variation as a source of dissipation. By using the reductive perturbation technique, the nonlinear Burgers equation is derived and the shock-like solution is determined. The effects of dust temperature on different characteristics of dust acoustic shock wave are discussed. It is found out that dust thickness is not affected by dust temperature while for every dusty plasma systems there is dust critical temperature T{sub dc}, for which the dust acoustic shock height will be maximum.

Asgari, H.; Muniandy, S. V.; Wong, C. S. [Plasma Research Laboratory, Department of Physics, University of Malaya, 50603 Kuala Lumpur (Malaysia)

2011-03-30T23:59:59.000Z

383

Impedance matched joined drill pipe for improved acoustic transmission  

DOE Patents (OSTI)

An impedance matched jointed drill pipe for improved acoustic transmission. A passive means and method that maximizes the amplitude and minimize the temporal dispersion of acoustic signals that are sent through a drill string, for use in a measurement while drilling telemetry system. The improvement in signal transmission is accomplished by replacing the standard joints in a drill string with joints constructed of a material that is impedance matched acoustically to the end of the drill pipe to which it is connected. Provides improvement in the measurement while drilling technique which can be utilized for well logging, directional drilling, and drilling dynamics, as well as gamma-ray spectroscopy while drilling post shot boreholes, such as utilized in drilling post shot boreholes.

Moss, William C. (San Mateo, CA)

2000-01-01T23:59:59.000Z

384

A broadband underwater acoustic modem implementation using coherent OFDM  

E-Print Network (OSTI)

Abstract — Multicarrier modulation in the form of orthogonal frequency division multiplexing (OFDM) has prevailed in recent broadband wireless systems over radio channels. In this senior design project, we have implemented an acoustic OFDM modem that transmits digital data through sound propagation. We have demonstrated OFDM transmission first in air, and then in water. We find that the underwater channel is much more complex than the air channel, and careful signal designs are needed for underwater transmissions. We have also handled another difficulty incurred by sampling rate mismatches at the transmitter and the receiver due to low-cost sampling devices. With two-way communication capabilities, this project provides a simple online chatting tool between two computers relying on acoustic links. Index Terms — OFDM, multicarrier transmission, underwater acoustic communication.

Sean Mason; Robert Anstett; Nicoletti Anicette; Shengli Zhou

2007-01-01T23:59:59.000Z

385

PHOTOMULTIPLIER CHARACTERISTICS CONSIDERATIONS FOR THE DEEP UNDERWATER MUON AND NEUTRINO DETECTION SYSTEM  

E-Print Network (OSTI)

Presented at the Deep Underwater Huon and Neutrino DetectionCONSIDERATIONS FOR THE DEEP UNDERWATER HUON AND NEUTRINOPresented at the Deep Underwater Huon and Neutrino Detection

Leskovar, B.

2010-01-01T23:59:59.000Z

386

Sensing system for detection and control of deposition on pendant tubes in recovery and power boilers  

DOE Patents (OSTI)

A system for detection and control of deposition on pendant tubes in recovery and power boilers includes one or more deposit monitoring sensors operating in infrared regions of about 4 or 8.7 microns and directly producing images of the interior of the boiler, or producing feeding signals to a data processing system for information to enable a distributed control system by which the boilers are operated to operate said boilers more efficiently. The data processing system includes an image pre-processing circuit in which a 2-D image formed by the video data input is captured, and includes a low pass filter for performing noise filtering of said video input. It also includes an image compensation system for array compensation to correct for pixel variation and dead cells, etc., and for correcting geometric distortion. An image segmentation module receives a cleaned image from the image pre-processing circuit for separating the image of the recovery boiler interior into background, pendant tubes, and deposition. It also accomplishes thresholding/clustering on gray scale/texture and makes morphological transforms to smooth regions, and identifies regions by connected components. An image-understanding unit receives a segmented image sent from the image segmentation module and matches derived regions to a 3-D model of said boiler. It derives a 3-D structure the deposition on pendant tubes in the boiler and provides the information about deposits to the plant distributed control system for more efficient operation of the plant pendant tube cleaning and operating systems.

Kychakoff, George (Maple Valley, WA); Afromowitz, Martin A. (Mercer Island, WA); Hogle, Richard E. (Olympia, WA)

2008-10-14T23:59:59.000Z

387

Acoustic Analysis of Adult Speaker Age  

Science Conference Proceedings (OSTI)

Information about the age of the speaker is always present in speech. It is used as perceptual cues to age by human listeners, and can be measured acoustically and used by automatic age estimators. This chapter offers an introduction to the phonetic ... Keywords: Acoustic analysis, Acoustic correlates, Phonetics, Speaker age

Susanne Schötz

2007-02-01T23:59:59.000Z

388

Development and Testing of Field-Deployable Real-Time Laser-Based Non-Intrusive Detection System for Measurement of True Travel Time on the Highway  

E-Print Network (OSTI)

Laser-Based Non-Intrusive Detection System for MeasurementLaser-Based Non-Intrusive Detection System for Measurementsystems are entirely dependent on time-of-?ight laser measurements

2001-01-01T23:59:59.000Z

389

Radio Acoustic Sounding with a UHF Volume Imaging Radar  

Science Conference Proceedings (OSTI)

An implementation of a radio acoustic sounding system (RASS) using a UHF volume imaging radar is presented. The volume-imaging ability of the radar permits the study the spatial structure of the RASS echo observing both the diffraction pattern on ...

Paco López Dekker; Stephen J. Frasier

2004-05-01T23:59:59.000Z

390

Abstract--This paper presents an overview of power system islanding and islanding detection techniques. Islanding detection  

E-Print Network (OSTI)

central generating stations, that is placed close to load being served, usually at customer site profile of the system, etc [1]. In fact, many utilities around the world already have a significant

Mahat, Pukar

391

On adaptive transmission, signal detection and channel estimation for multiple antenna systems  

E-Print Network (OSTI)

This research concerns analysis of system capacity, development of adaptive transmission schemes with known channel state information at the transmitter (CSIT) and design of new signal detection and channel estimation schemes with low complexity in some multiple antenna systems. We first analyze the sum-rate capacity of the downlink of a cellular system with multiple transmit antennas and multiple receive antennas assuming perfect CSIT. We evaluate the ergodic sum-rate capacity and show how the sum-rate capacity increases as the number of users and the number of receive antennas increases. We develop upper and lower bounds on the sum-rate capacity and study various adaptive MIMO schemes to achieve, or approach, the sum-rate capacity. Next, we study the minimum outage probability transmission schemes in a multiple-input-single-output (MISO) flat fading channel assuming partial CSIT. Considering two special cases: the mean feedback and the covariance feedback, we derive the optimum spatial transmission directions and show that the associated optimum power allocation scheme, which minimizes the outage probability, is closely related to the target rate and the accuracy of the CSIT. Since CSIT is obtained at the cost of feedback bandwidth, we also consider optimal allocation of bandwidth between the data channel and the feedback channel in order to maximize the average throughput of the data channel in MISO, flat fading, frequency division duplex (FDD) systems. We show that beamforming based on feedback CSI can achieve an average rate larger than the capacity without CSIT under a wide range of mobility conditions. We next study a SAGE-aided List-BLAST detection scheme for MIMO systems which can achieve performance close to that of the maximum-likelihood detector with low complexity. Finally, we apply the EM and SAGE algorithms in channel estimation for OFDM systems with multiple transmit antennas and compare them with a recently proposed least-squares based estimation algorithm. The EM and SAGE algorithms partition the problem of estimating a multi-input channel into independent channel estimation for each transmit-receive antenna pair, therefore avoiding the matrix inversion encountered in the joint least-squares estimation.

Xie, Yongzhe

2004-08-01T23:59:59.000Z

392

Surface acoustic wave probe implant for predicting epileptic seizures  

DOE Patents (OSTI)

A system and method for predicting and avoiding a seizure in a patient. The system and method includes use of an implanted surface acoustic wave probe and coupled RF antenna to monitor temperature of the patient's brain, critical changes in the temperature characteristic of a precursor to the seizure. The system can activate an implanted cooling unit which can avoid or minimize a seizure in the patient.

Gopalsami, Nachappa (Naperville, IL); Kulikov, Stanislav (Sarov, RU); Osorio, Ivan (Leawood, KS); Raptis, Apostolos C. (Downers Grove, IL)

2012-04-24T23:59:59.000Z

393

A New Method for Measuring Flow Structure in the Benthic Boundary Layer Using an Acoustic Doppler Velocimeter  

Science Conference Proceedings (OSTI)

A new system for precise measurement of vertical profiles of mean and turbulent flow structure immediately above the sediment–water interface is introduced. This system has an acoustic Doppler velocimeter (ADV) attached to an elevation system to ...

Tetsunori Inoue; Yoshiyuki Nakamura; Mikio Sayama

2008-05-01T23:59:59.000Z

394

Acoustic black holes Matt Visser  

E-Print Network (OSTI)

Acoustic black holes Matt Visser Physics Department Washington University Saint Louis USA Ole Miss you develop a number of use- ful connections between supersonic uid ow and black holes in general is the basis underlying a deep and fruitful analogy between the black holes of Einstein gravity and supersonic

Visser, Matt

395

Study of the Acoustic Effects of Hydrokinetic Tidal Turbines in Admiralty Inlet, Puget Sound  

SciTech Connect

Hydrokinetic turbines will be a source of noise in the marine environment - both during operation and during installation/removal. High intensity sound can cause injury or behavioral changes in marine mammals and may also affect fish and invertebrates. These noise effects are, however, highly dependent on the individual marine animals; the intensity, frequency, and duration of the sound; and context in which the sound is received. In other words, production of sound is a necessary, but not sufficient, condition for an environmental impact. At a workshop on the environmental effects of tidal energy development, experts identified sound produced by turbines as an area of potentially significant impact, but also high uncertainty. The overall objectives of this project are to improve our understanding of the potential acoustic effects of tidal turbines by: (1) Characterizing sources of existing underwater noise; (2) Assessing the effectiveness of monitoring technologies to characterize underwater noise and marine mammal responsiveness to noise; (3) Evaluating the sound profile of an operating tidal turbine; and (4) Studying the effect of turbine sound on surrogate species in a laboratory environment. This study focuses on a specific case study for tidal energy development in Admiralty Inlet, Puget Sound, Washington (USA), but the methodologies and results are applicable to other turbine technologies and geographic locations. The project succeeded in achieving the above objectives and, in doing so, substantially contributed to the body of knowledge around the acoustic effects of tidal energy development in several ways: (1) Through collection of data from Admiralty Inlet, established the sources of sound generated by strong currents (mobilizations of sediment and gravel) and determined that low-frequency sound recorded during periods of strong currents is non-propagating pseudo-sound. This helped to advance the debate within the marine and hydrokinetics acoustic community as to whether strong currents produce propagating sound. (2) Analyzed data collected from a tidal turbine operating at the European Marine Energy Center to develop a profile of turbine sound and developed a framework to evaluate the acoustic effects of deploying similar devices in other locations. This framework has been applied to Public Utility District No. 1 of Snohomish Country's demonstration project in Admiralty Inlet to inform postinstallation acoustic and marine mammal monitoring plans. (3) Demonstrated passive acoustic techniques to characterize the ambient noise environment at tidal energy sites (fixed, long-term observations recommended) and characterize the sound from anthropogenic sources (drifting, short-term observations recommended). (4) Demonstrated the utility and limitations of instrumentation, including bottom mounted instrumentation packages, infrared cameras, and vessel monitoring systems. In doing so, also demonstrated how this type of comprehensive information is needed to interpret observations from each instrument (e.g., hydrophone data can be combined with vessel tracking data to evaluate the contribution of vessel sound to ambient noise). (5) Conducted a study that suggests harbor porpoise in Admiralty Inlet may be habituated to high levels of ambient noise due to omnipresent vessel traffic. The inability to detect behavioral changes associated with a high intensity source of opportunity (passenger ferry) has informed the approach for post-installation marine mammal monitoring. (6) Conducted laboratory exposure experiments of juvenile Chinook salmon and showed that exposure to a worse than worst case acoustic dose of turbine sound does not result in changes to hearing thresholds or biologically significant tissue damage. Collectively, this means that Chinook salmon may be at a relatively low risk of injury from sound produced by tidal turbines located in or near their migration path. In achieving these accomplishments, the project has significantly advanced the District's goals of developing a demonstration-scale tidal energy proj

Brian Polagye; Jim Thomson; Chris Bassett; Jason Wood; Dom Tollit; Robert Cavagnaro; Andrea Copping

2012-03-30T23:59:59.000Z

396

Little Goose Dam Full Flow PIT-Tag Detection System Project Summary.  

DOE Green Energy (OSTI)

In 2006, the design phase of this project was kicked off and was for the most part modeled after the Full Flow PIT installation installed at Lower Monumental Dam during winter and spring of 2006 and 2007. As the Goose Full Flow design progressed and the project started to move towards construction, issues within contracting occurred and the project was put on delay for 1 year. Starting in mid December of 2008, Harcon Inc. was awarded the contract and construction of the new Goose Full Flow PIT-tag detection system began. The purpose of this document is to summarize the installation of the Little Goose Full Flow project from start to finish and to highlight the notable successes and challenges that the installation presented along with the final results and current status.

Warf, Don; Livingston, Scott [Pacific States Marine Fisheries Commission

2009-04-16T23:59:59.000Z

397

BASIC METHODS FOR AUTOMATED FAULT DETECTION AND ENERGY DATA VALIDATION IN EXISTING DISTRICT HEATING SYSTEMS  

E-Print Network (OSTI)

behaviour over time, as expected for any kind of instrumentation. For example, incorrect information can be generated if there is a bias change or high level of noise in the signal from a sensor, or if there is a malfunctioning flow meter or temperature sensor. Defect or incorrectly dimensioned valves can degrade the energy efficiency of the system and also need to be detected through the effects on the measurements. Fault detection and diagnostics (FDD) of district heating substations (DHS) are important activities because malfunctioning components can lead to incorrect billing and waste of energy. Although FDD has been an activate research area for nearly two decades, only a few simple tools are commonly deployed in the district energy industry. Some of the methods proposed in the literature are promising, but their complexity may prevent broader application. Other methods require sensor data that are not commonly available, or cannot be expected to function well in practice due to oversimplification. Here we present two basic methods for improved FDD and data validation that are compatible with the data acquisition systems that are commonly used today. We propose that correlation analysis can be used to identify substations with similar supply temperatures and that the corresponding temperature difference is a useful quantity for FDD. The second method is a limitchecking approach for the validation of thermal power usage, which is sensitive to faults affecting both the primary flow and temperature sensors in a DHS. These methods are suitable for automated FDD and are demonstrated with hourly data provided by a Swedish district energy company.

Fredrik S; Jonas Gustafsson; Robert Eklund; Jerker Delsing

2012-01-01T23:59:59.000Z

398

SYSTEM FOR DETECTION AND CONTROL OF DEPOSITION IN KRAFT CHEMICAL RECOVERY BOILERS AND MONITORING GLASS FURNACES  

SciTech Connect

Combustion Specialists, Inc. has just completed a project designed to develop the capability to monitor and control the formation of deposits on the outside of boiler tubes inside an operating kraft recovery furnace. This project, which was carried out in the period from April 1, 2001 to January 31, 2003, was funded by the Department of Energy's Inventions and Innovations program. The primary objectives of the project included the development and demonstration of the ability to produce clear images of deposits throughout the convective sections of operating recovery boilers using newly developed infrared imaging technology, to demonstrate the automated detection and quantification of these deposits using custom designed image processing software developed as part of the project, and to demonstrate the feasibility of all technical elements required for a commercial ''smart'' sootblowing control system based on direct feedback from automated imaging of deposits in real-time. All of the individual tasks have been completed and all objectives have been substantially achieved. Imaging of deposits throughout the convective sections of several recovery boilers has been demonstrated, a design for a combined sootblower/deposit inspection probe has been developed and a detailed heat transfer analysis carried out to demonstrate the feasibility of this design, an improved infrared imager which can be sufficiently miniaturized for this application has been identified, automated deposit detection software has been developed and demonstrated, a detailed design for all the necessary communications and control interfaces has been developed, and a test has been carried out in a glass furnace to demonstrate the applicability of the infrared imaging sensor in that environment. The project was completed on time and within the initial budget. A commercial partner has been identified and further federal funding will be sought to support a project to develop a commercial prototype sootblowing control system employing automated deposit imaging.

Dr. Peter Ariessohn

2003-04-15T23:59:59.000Z

399

Peak Tracking by Simultaneous Inversion: Toward a One-Step Acoustic Tomography Analysis  

Science Conference Proceedings (OSTI)

A number of geophysical observing techniques, including ocean acoustic tomography, obtain sequences of records of which the observed relative maxima (“peaks”) are used to infer properties of the system via inversions. Traditionally, these peaks ...

Uwe Send

1996-10-01T23:59:59.000Z

400

Marine Animal Alert System -- Task 2.1.5.3: Development of Monitoring Technologies -- FY 2011 Progress Report  

SciTech Connect

The Marine Animal Alert System (MAAS) in development by the Pacific Northwest National Laboratory is focused on providing elements of compliance monitoring to support deployment of marine hydrokinetic energy devices. An initial focus is prototype tidal turbines to be deployed in Puget Sound in Washington State. The MAAS will help manage the risk of injury or mortality to marine animals from blade strike or contact with tidal turbines. In particular, development has focused on detection, classification, and localization of listed Southern Resident killer whales within 200 m of prototype turbines using both active and passive acoustic approaches. At the close of FY 2011, a passive acoustic system consisting of a pair of four-element star arrays and parallel processing of eight channels of acoustic receptions has been designed and built. Field tests of the prototype system are scheduled for the fourth quarter of calendar year 2011. Field deployment and testing of the passive acoustic prototype is scheduled for the first quarter of FY 2012. The design of an active acoustic system that could be built using commercially available off-the-shelf components from active acoustic system vendors is also in the final stages of design and specification.

Carlson, Thomas J.; Deng, Zhiqun; Myers, Joshua R.; Matzner, Shari; Copping, Andrea E.

2011-09-30T23:59:59.000Z

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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Broken Bar Detection in Synchronous Machines Based Wind Energy Conversion System  

E-Print Network (OSTI)

Electrical machines are subject to different types of failures. Early detection of the incipient faults and fast maintenance may prevent costly consequences. Fault diagnosis of wind turbine is especially important because they are situated at extremely high towers and therefore inaccessible. For offshore plants, bad weather can prevent any repair actions for several weeks. In some of the new wind turbines synchronous generators are used and directly connected to the grid without the need of power converters. Despite intensive research efforts directed at rotor fault diagnosis in induction machines, the research work pertinent to damper winding failure of synchronous machines is very limited. This dissertation is concerned with the in-depth study of damper winding failure and its traceable symptoms in different machine signals and parameters. First, a model of a synchronous machine with damper winding based on the winding function approach is presented. Next, simulation and experimental results are presented and discussed. A specially designed inside-out synchronous machine with a damper winding is employed for the experimental setup. Finally, a novel analytical method is developed to predict the behavior of the left sideband amplitude for different numbers and locations of the broken bars. This analysis is based on the magnetic field theory and the unbalanced multiphase circuits. It is found that due to the asymmetrical structure of damper winding, the left sideband component in the stator current spectrum of the synchronous machine during steady state asynchronous operation is not similar to that of the induction machine with broken bars. As a result, the motor current signature analysis (MCSA) for detection rotor failures in the induction machine is usable to detect broken damper bars in synchronous machines. However, a novel intelligent-systems based approach is developed that can identify the severity of the damper winding failure. This approach potentially can be used in a non-invasive condition monitoring system to monitor the deterioration of a synchronous motor damper winding as the number of broken bars increase over time. Some other informative features such as speed spectrum, transient time, torque-speed curve and rotor slip are also found for damper winding diagnosis.

Rahimian, Mina Mashhadi

2011-08-01T23:59:59.000Z

402

Acoustic sand detector for fluid flowstreams  

DOE Patents (OSTI)

The particle volume and particle mass production rate of particulate solids entrained in fluid flowstreams such as formation sand or fracture proppant entrained in oil and gas production flowstreams is determined by a system having a metal probe interposed in a flow conduit for transmitting acoustic emissions created by particles impacting the probe to a sensor and signal processing circuit which produces discrete signals related to the impact of each of the particles striking the probe. The volume or mass flow rate of particulates is determined from making an initial particle size distribution and particle energy distribution and comparing the initial energy distribution and/or the initial size distribution with values related to the impact energies of a predetermined number of recorded impacts. The comparison is also used to recalibrate the system to compensate for changes in flow velocity.

Beattie, Alan G. (Corrales, NM); Bohon, W. Mark (Frisco, TX)

1993-01-01T23:59:59.000Z

403

Detecting and Attributing External Influences on the Climate System: A Review of Recent Advances  

Science Conference Proceedings (OSTI)

This paper reviews recent research that assesses evidence for the detection of anthropogenic and natural external influences on the climate. Externally driven climate change has been detected by a number of investigators in independent data ...

2005-05-01T23:59:59.000Z

404

SNARE: a link analytic system for graph labeling and risk detection  

Science Conference Proceedings (OSTI)

Classifying nodes in networks is a task with a wide range of applications. It can be particularly useful in anomaly and fraud detection. Many resources are invested in the task of fraud detection due to the high cost of fraud, and being able to automatically ... Keywords: anomaly detection, belief propagation, social networks

Mary McGlohon; Stephen Bay; Markus G. Anderle; David M. Steier; Christos Faloutsos

2009-06-01T23:59:59.000Z

405

Software acoustic modems for short range mote-based underwater sensor networks  

E-Print Network (OSTI)

Abstract — Most recent work in underwater network development has relied on using expensive commercial acoustic modems or on building custom transceivers for each application to establish acoustic communication links among the sensors. Using commercial modems or designing custom hardware may require prohibitive monetary or time investment for many applications. Our work proposes the design of software acoustic modems that can utilize built-in microphones and speakers on the relatively cheap Tmote Invent platforms. The software modem and built-in hardware can be used for establishing acoustic communication in a short range shallow water network for environmental monitoring. In this paper, we introduce the application and architecture for our proposed network, as well as the initial design of our acoustic communication system. Our experiments with generic acoustic hardware to profile this underwater communication channel reveal that this channel favors frequencies below 3Khz, a result which guides the design choices for our FSK software modem. We perform experiments with our software modem/generic hardware system to explore the system’s data transfer capability. The data communications experiments confirm the system’s capability of transferring information in the order of tens of bits per second for a communications range of up to 10 meters. I.

Raja Jurdak; Cristina Videira Lopes; Pierre Baldi

2006-01-01T23:59:59.000Z

406

New Hardware and Software Design of a Field-Deployable Real-Time Laser-Based Non-Intrusive Detection System for Measurement of True Travel Time on the Highway  

E-Print Network (OSTI)

Time Laser-Based Prototype Detection System for MeasurementLaser-Based Non-Intrusive Detection System for MeasurementLaser-Based Non-Intrusive Detection System for Measurement

2001-01-01T23:59:59.000Z

407

A H-infinity Fault Detection and Diagnosis Scheme for Discrete Nonlinear System Using Output Probability Density Estimation  

Science Conference Proceedings (OSTI)

In this paper, a H-infinity fault detection and diagnosis (FDD) scheme for a class of discrete nonlinear system fault using output probability density estimation is presented. Unlike classical FDD problems, the measured output of the system is viewed as a stochastic process and its square root probability density function (PDF) is modeled with B-spline functions, which leads to a deterministic space-time dynamic model including nonlinearities, uncertainties. A weighting mean value is given as an integral function of the square root PDF along space direction, which leads a function only about time and can be used to construct residual signal. Thus, the classical nonlinear filter approach can be used to detect and diagnose the fault in system. A feasible detection criterion is obtained at first, and a new H-infinity adaptive fault diagnosis algorithm is further investigated to estimate the fault. Simulation example is given to demonstrate the effectiveness of the proposed approaches.

Zhang Yumin; Lum, Kai-Yew [Temasek Laboratories, National University of Singapore, Singapore 117508 (Singapore); Wang Qingguo [Depa. Electrical and Computer Engineering, National University of Singapore, Singapore 117576 (Singapore)

2009-03-05T23:59:59.000Z

408

High resolution biomedical imaging system with direct detection of x-rays via a charge coupled device  

DOE Patents (OSTI)

An imaging system is provided for direct detection of x-rays from an irradiated biological tissue. The imaging system includes an energy source for emitting x-rays toward the biological tissue and a charge coupled device (CCD) located immediately adjacent the biological tissue and arranged transverse to the direction of irradiation along which the x-rays travel. The CCD directly receives and detects the x-rays after passing through the biological tissue. The CCD is divided into a matrix of cells, each of which individually stores a count of x-rays directly detected by the cell. The imaging system further includes a pattern generator electrically coupled to the CCD for reading a count from each cell. A display device is provided for displaying an image representative of the count read by the pattern generator from the cells of the CCD.

Atac, Muzaffer (Wheaton, IL); McKay, Timothy A. (Ann Arbor, MI)

1998-01-01T23:59:59.000Z

409

EA-507; Environmental Assessment and FONSI For The FAA Explosive Detection System Independent Validation And Verification Program INEL  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

07; Environmental Assessment and FONSI For The FAA Explosive 07; Environmental Assessment and FONSI For The FAA Explosive Detection System Independent Validation And Verification Program INEL Table of Contents 1. NEED FOR PROPOSED ACTION 2. DESCRIPTION OF THE PROPOSED ACTION 3. ALTERNATIVES TO PROPOSED ACTION 4. ENVIRONMENTAL IMPACTS OF PROPOSED ACTION 5. CONCLUSIONS/SUMMARY 6. LIST OF PREPARERS 7. REFERENCES APPENDIX I Map of WRRTF APPENDIX II Accident Safety Analysis FINDING OF NO SIGNIFICANT IMPACT FEDERAL AVIATION ADMINISTRATION EXPLOSIVE DETECTION SYSTEM - INDEPENDENT VALIDATION AND VERIFICATION PROGRAM LIST OF FIGURES Page XXX WATER REACTOR RESEARCH TEST FACT 1. NEED FOR PROPOSED ACTION The urgent development, fabrication, and operation of advanced explosive detection systems are needed by the Federal Aviation Agency (FAA) to

410

Argonne CNM Highlight: Damping of acoustic vibrations in gold nanoparticles  

NLE Websites -- All DOE Office Websites (Extended Search)

Damping of acoustic vibrations in gold nanoparticles Damping of acoustic vibrations in gold nanoparticles Nanopatterning of STO Vibrations in nanostructures offer applications in molecular-scale biological sensing and ultrasensitive mass detection. To approach single-atom sensing, it is necessary to reduce the dimensions of the structures to the nanometer scale while preserving long-lived vibrations. This requires an understanding of how vibrations in nanoscale objects are damped - or lose their energy to the fluid surroundings and within themselves. Researchers have used fast laser pulses to produce and probe high-frequency vibrations in metal nanoparticles. However, significant variations in particle dimensions complicate measurements. By studying bipyramid-shaped gold nanoparticles with highly uniform sizes

411

Langasite Surface Acoustic Wave Sensors: Fabrication and Testing  

SciTech Connect

We report on the development of harsh-environment surface acoustic wave sensors for wired and wireless operation. Surface acoustic wave devices with an interdigitated transducer emitter and multiple reflectors were fabricated on langasite substrates. Both wired and wireless temperature sensing was demonstrated using radar-mode (pulse) detection. Temperature resolution of better than ±0.5°C was achieved between 200°C and 600°C. Oxygen sensing was achieved by depositing a layer of ZnO on the propagation path. Although the ZnO layer caused additional attenuation of the surface wave, oxygen sensing was accomplished at temperatures up to 700°C. The results indicate that langasite SAW devices are a potential solution for harsh-environment gas and temperature sensing.

Zheng, Peng; Greve, David W.; Oppenheim, Irving J.; Chin, Tao-Lun; Malone, Vanessa

2012-02-01T23:59:59.000Z

412

Acoustic horizons in nuclear fluids  

E-Print Network (OSTI)

We consider a hydrodynamic description of the spherically symmetric outward flow of nuclear matter, accommodating dispersion in it as a very weak effect. About the resulting stationary conditions in the flow, we apply an Eulerian scheme to derive a fully nonlinear equation of a time-dependent radial perturbation. In its linearized limit, with no dispersion, this equation implies the static acoustic horizon of an analogue gravity model. We, however, show that time-dependent nonlinear effects destabilize the static horizon. We also model the perturbation as a high-frequency travelling wave, and perform a {\\it WKB} analysis, in which the effect of weak dispersion is studied iteratively. We show that even arbitrarily small values of dispersion make the horizon fully opaque to any acoustic disturbance propagating against the bulk flow, with the amplitude and the energy flux of the radial perturbation undergoing a discontinuity at the horizon, and decaying exponentially just outside it.

Niladri Sarkar; Abhik Basu; Jayanta K. Bhattacharjee; Arnab K. Ray

2013-06-03T23:59:59.000Z

413

Cylindrical acoustic levitator/concentrator  

DOE Patents (OSTI)

A low-power, inexpensive acoustic apparatus for levitation and/or concentration of aerosols and small liquid/solid samples having particulates up to several millimeters in diameter in air or other fluids is described. It is constructed from a commercially available, hollow cylindrical piezoelectric crystal which has been modified to tune the resonance frequency of the breathing mode resonance of the crystal to that of the interior cavity of the cylinder. When the resonance frequency of the interior cylindrical cavity is matched to the breathing mode resonance of the cylindrical piezoelectric transducer, the acoustic efficiency for establishing a standing wave pattern in the cavity is high. The cylinder does not require accurate alignment of a resonant cavity. Water droplets having diameters greater than 1 mm have been levitated against the force of gravity using; less than 1 W of input electrical power. Concentration of aerosol particles in air is also demonstrated.

Kaduchak, Gregory (Los Alamos, NM); Sinha, Dipen N. (Los Alamos, NM)

2002-01-01T23:59:59.000Z

414

System and method for constructing filters for detecting signals whose frequency content varies with time  

DOE Patents (OSTI)

A system and method are disclosed for constructing a bank of filters which detect the presence of signals whose frequency content varies with time. The present invention includes a novel system and method for developing one or more time templates designed to match the received signals of interest and the bank of matched filters use the one or more time templates to detect the received signals. Each matched filter compares the received signal x(t) with a respective, unique time template that has been designed to approximate a form of the signals of interest. The robust time domain template is assumed to be of the order of w(t)=A(t)cos(2{pi}{phi}(t)) and the present invention uses the trajectory of a joint time-frequency representation of x(t) as an approximation of the instantaneous frequency function {phi}{prime}(t). First, numerous data samples of the received signal x(t) are collected. A joint time frequency representation is then applied to represent the signal, preferably using the time frequency distribution series. The joint time-frequency transformation represents the analyzed signal energy at time t and frequency f, P(t,f), which is a three-dimensional plot of time vs. frequency vs. signal energy. Then P(t,f) is reduced to a multivalued function f(t), a two dimensional plot of time vs. frequency, using a thresholding process. Curve fitting steps are then performed on the time/frequency plot, preferably using Levenberg-Marquardt curve fitting techniques, to derive a general instantaneous frequency function {phi}{prime}(t) which best fits the multivalued function f(t). Integrating {phi}{prime}(t) along t yields {phi}{prime}(t), which is then inserted into the form of the time template equation. A suitable amplitude A(t) is also preferably determined. Once the time template has been determined, one or more filters are developed which each use a version or form of the time template. 7 figs.

Qian, S.; Dunham, M.E.

1996-11-12T23:59:59.000Z

415

System and method for constructing filters for detecting signals whose frequency content varies with time  

DOE Patents (OSTI)

A system and method for constructing a bank of filters which detect the presence of signals whose frequency content varies with time. The present invention includes a novel system and method for developing one or more time templates designed to match the received signals of interest and the bank of matched filters use the one or more time templates to detect the received signals. Each matched filter compares the received signal x(t) with a respective, unique time template that has been designed to approximate a form of the signals of interest. The robust time domain template is assumed to be of the order of w(t)=A(t)cos{2.pi..phi.(t)} and the present invention uses the trajectory of a joint time-frequency representation of x(t) as an approximation of the instantaneous frequency function {.phi.'(t). First, numerous data samples of the received signal x(t) are collected. A joint time frequency representation is then applied to represent the signal, preferably using the time frequency distribution series (also known as the Gabor spectrogram). The joint time-frequency transformation represents the analyzed signal energy at time t and frequency .function., P(t,f), which is a three-dimensional plot of time vs. frequency vs. signal energy. Then P(t,f) is reduced to a multivalued function f(t), a two dimensional plot of time vs. frequency, using a thresholding process. Curve fitting steps are then performed on the time/frequency plot, preferably using Levenberg-Marquardt curve fitting techniques, to derive a general instantaneous frequency function .phi.'(t) which best fits the multivalued function f(t), a trajectory of the joint time-frequency domain representation of x(t). Integrating .phi.'(t) along t yields .phi.(t), which is then inserted into the form of the time template equation. A suitable amplitude A(t) is also preferably determined. Once the time template has been determined, one or more filters are developed which each use a version or form of the time template.

Qian, Shie (Austin, TX); Dunham, Mark E. (Los Alamos, NM)

1996-01-01T23:59:59.000Z

416

Characterization of acoustic signals due to surface discharges on H.V. glass insulators using wavelet radial basis function neural networks  

Science Conference Proceedings (OSTI)

A hybrid model incorporating wavelet and radial basis function neural network is presented which is used to detect, identify and characterize the acoustic signals due to surface discharge activity and hence differentiate abnormal operating conditions ... Keywords: Acoustic signal, Dry bands, Glass insulator, RBF-NN, Surface discharge, Wavelet transform

Nasir A. Al-geelani; M. Afendi M. Piah; Redhwan Q. Shaddad

2012-04-01T23:59:59.000Z

417

Apparatus for detecting a magnetic anomaly contiguous to remote location by squid gradiometer and magnetometer systems  

DOE Patents (OSTI)

A superconducting quantum interference device (SQUID) magnetic detection apparatus detects magnetic fields, signals, and anomalies at remote locations. Two remotely rotatable SQUID gradiometers may be housed in a cryogenic environment to search for and locate unambiguously magnetic anomalies. The SQUID magnetic detection apparatus can be used to determine the azimuth of a hydrofracture by first flooding the hydrofracture with a ferrofluid to create an artificial magnetic anomaly therein.

Overton, Jr., William C. (Los Alamos, NM); Steyert, Jr., William A. (Los Alamos, NM)

1984-01-01T23:59:59.000Z

418

RELIABILITY CONSIDERATIONS OF ELECTRONICS COMPONENTS FOR THE DEEP UNDERWATER MUON AND NEUTRINO DETECTION SYSTEM  

E-Print Network (OSTI)

Considerations for the Dtep Underwater Muon and NeutrinoPresented at the Deep Underwater Huon and Neutrino DetectionCOMPONENTS FOR THE DEEP UNDERWATER MUON AND NEUTRINO

Leskovar, B.

2010-01-01T23:59:59.000Z

419

Acoustic concentration of particles in fluid flow  

DOE Patents (OSTI)

An apparatus for acoustic concentration of particles in a fluid flow includes a substantially acoustically transparent membrane and a vibration generator that define a fluid flow path therebetween. The fluid flow path is in fluid communication with a fluid source and a fluid outlet and the vibration generator is disposed adjacent the fluid flow path and is capable of producing an acoustic field in the fluid flow path. The acoustic field produces at least one pressure minima in the fluid flow path at a predetermined location within the fluid flow path and forces predetermined particles in the fluid flow path to the at least one pressure minima.

Ward, Michael D. (Los Alamos, NM); Kaduchak, Gregory (Los Alamos, NM)

2010-11-23T23:59:59.000Z

420

DEVELOPMENT OF A LONG WAVELENGTH ACOUSTIC ...  

Science Conference Proceedings (OSTI)

... are developing a long-wavelength acoustic flowmeter (LWAF) for accurate, economical measurements of exhaust flows from coal-burning power ...

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Wind Turbine Acoustic Noise A white paper  

E-Print Network (OSTI)

Wind Turbine Acoustic Noise A white paper Prepared by the Renewable Energy Research Laboratory...................................................................... 8 Sound from Wind Turbines .............................................................................................. 10 Sources of Wind Turbine Sound

Massachusetts at Amherst, University of

422

Ricoh Company LTD. Acoustical Testing Laboratory  

Science Conference Proceedings (OSTI)

Acoustical Testing Laboratory. ... 143-8555 JAPAN Contact: Mr. Seiji Nakamura Phone: 81-046-292-3871 Fax: E-Mail: seiji.nakamura@nts.ricoh.co.jp ...

2013-11-08T23:59:59.000Z

423

Alion Science and Technology / Riverbank Acoustical ...  

Science Conference Proceedings (OSTI)

... E2179 Laboratory Measurement of the Effectiveness of Floor Coverings in Reducing ... 08/P61] AAMA 1801 Acoustical Rating of Windows, Doors and ...

2013-07-19T23:59:59.000Z

424

Time synchronization for underwater acoustic sensor networks.  

E-Print Network (OSTI)

??The unique properties of underwater acoustic communications, such as large and time-varying propagation, low and range dependent bandwidth, and adverse operating environment make the synchronization… (more)

Khandoker, Tarik-Ul Islam

2012-01-01T23:59:59.000Z

425

Biofouling detection monitoring devices: status assessment. Final report  

SciTech Connect

An inventory of devices to detect and monitor biofouling in power plant condenser systems was prepared. The inventory was developed through a review of manufacturers' product information brochures, a general literature review, and limited personal contact with users and manufacturers. Two macrofouling and seventeen microfouling detection devices were reviewed. A summary analysis of the principal features of each device was prepared. Macrofouling devices are generally simple devices located at or near cooling water intakes. They monitor the growth of larger organisms such as mussels, barnacles, and large seaweeds. Microfouling detectors are usually located in or near the condenser tubes. They detect and monitor the growth of slime films on the tubes. Some of the devices measure changes in heat transfer or pressure drop in the condenser tubes. Other types include condenser simulators, biofilm samplers, or devices that measure the acoustic properties of the fouling films. Most devices are still in the development stage. Of the few available for general use, the type that measures heat transfer and/or pressure drop are developed to a greater degree than the other types. Recommendations for further research into development of a biofouling detection and monitoring devices include a side-by-side field comparison of selected devices, and the continued development of an effective acoustic device.

Hillman, R.E.; Anson, D.; Corliss, J.M.; Vigon, B.W.; Gray, R.H.; Bomelburg, H.J.

1985-03-01T23:59:59.000Z

426

Continuous wave acoustic method for determination of moisture content in agricultural soil  

Science Conference Proceedings (OSTI)

This work deals with the problem of measuring moisture content in agricultural soil by means of an on-site, easy to use and real-time acoustic wave system. The method is based on the propagation of an acoustic continuous wave (CW) with frequencies below ... Keywords: Continuous wave, Irrigation monitoring and control, Soil moisture measurement, Sound propagation in soil, Speed of sound, Texture of soil, Transit time

R. K. Sharma; A. K. Gupta

2010-08-01T23:59:59.000Z

427

Acoustic emission feedback control for control of boiling in a microwave oven  

DOE Patents (OSTI)

An acoustic emission based feedback system for controlling the boiling level of a liquid medium in a microwave oven is provided. The acoustic emissions from the medium correlated with surface boiling is used to generate a feedback control signal proportional to the level of boiling of the medium. This signal is applied to a power controller to automatically and continuously vary the power applied to the oven to control the boiling at a selected level. 2 figs.

White, T.L.

1990-05-02T23:59:59.000Z

428

Acoustic emission feedback control for control of boiling in a microwave oven  

DOE Patents (OSTI)

An acoustic emission based feedback system for controlling the boiling level of a liquid medium in a microwave oven is provided. The acoustic emissions from the medium correlated with surface boiling is used to generate a feedback control signal proportional to the level of boiling of the medium. This signal is applied to a power controller to automatically and continuoulsly vary the power applied to the oven to control the boiling at a selected level.

White, Terry L. (Oak Ridge, TN)

1991-01-01T23:59:59.000Z

429

Panorama: capturing system-wide information flow for malware detection and analysis  

Science Conference Proceedings (OSTI)

Malicious programs spy on users' behavior and compromise their privacy. Even software from reputable vendors, such as Google Desktop and Sony DRM media player, may perform undesirable actions. Unfortunately, existing techniques for detecting malware ... Keywords: dynamic taint analysis, malware analysis, malware detection, spyware

Heng Yin; Dawn Song; Manuel Egele; Christopher Kruegel; Engin Kirda

2007-10-01T23:59:59.000Z

430

Oil and gas exploration system and method for detecting trace amounts of hydrocarbon gases in the atmosphere  

DOE Patents (OSTI)

An oil and gas exploration system and method for land and airborne operations, the system and method used for locating subsurface hydrocarbon deposits based upon a remote detection of trace amounts of gases in the atmosphere. The detection of one or more target gases in the atmosphere is used to indicate a possible subsurface oil and gas deposit. By mapping a plurality of gas targets over a selected survey area, the survey area can be analyzed for measurable concentration anomalies. The anomalies are interpreted along with other exploration data to evaluate the value of an underground deposit. The system includes a differential absorption lidar (DIAL) system with a spectroscopic grade laser light and a light detector. The laser light is continuously tunable in a mid-infrared range, 2 to 5 micrometers, for choosing appropriate wavelengths to measure different gases and avoid absorption bands of interference gases. The laser light has sufficient optical energy to measure atmospheric concentrations of a gas over a path as long as a mile and greater. The detection of the gas is based on optical absorption measurements at specific wavelengths in the open atmosphere. Light that is detected using the light detector contains an absorption signature acquired as the light travels through the atmosphere from the laser source and back to the light detector. The absorption signature of each gas is processed and then analyzed to determine if a potential anomaly exists.

Wamsley, Paula R. (Littleton, CO); Weimer, Carl S. (Littleton, CO); Nelson, Loren D. (Evergreen, CO); O' Brien, Martin J. (Pine, CO)

2003-01-01T23:59:59.000Z

431

Underwater acoustic navigation with the WHOI micro-modem  

E-Print Network (OSTI)

Abstract — The WHOI Micro-Modem is a compact, low-power acoustic transceiver that can provide both acoustic telemetry and navigation. Its size and versatility make it ideal for integration in autonomous underwater vehicles (AUVs). The modem supports the use of both broadband and narrowband transponders for long baseline navigation systems, has a modem-to-modem ranging capability, and can be configured to provide synchronous oneway ranging, when integrated with a precision clock. This paper gives an overview of the different navigation systems supported by the Micromodem and presents the results from field tests conducted on the SeaBED AUV in deployments in Greece, the Bluefin AUV, and whale localizations in the Stellwagen Bank Marine Sanctuary. I.

Ipa Singh; Matthew Grund; Brian Bingham; Ryan Eustice; Hanumant Singh; Lee Freitag

2006-01-01T23:59:59.000Z

432

Optimal adaptive sampling for continental shelf acoustic forecasting.  

Science Conference Proceedings (OSTI)

Shallow water acoustic propagation variability is driven by bathymetry and geo?acoustic and oceanographic variabilities. At the shelf?break

Kevin D. Heaney

2009-01-01T23:59:59.000Z

433

Reliable Data Communication and Storage in Underwater Acoustic Networks.  

E-Print Network (OSTI)

??Underwater acoustic communications (UAC) and networking (UAN) are promising paradigms for various oceanic applications. However, acoustic signal transmissions are characterized by long propagation delay, frequency-dependent… (more)

Cao, Rui

2011-01-01T23:59:59.000Z

434

Quad Cities Unit 2 Main Steam Line Acoustic Source Identification and Load Reduction  

SciTech Connect

The Quad Cities Units 1 and 2 have a history of steam line vibration issues. The implementation of an Extended Power Up-rate resulted in significant increases in steam line vibration as well as acoustic loading of the steam dryers, which led to equipment failures and fatigue cracking of the dryers. This paper discusses the results of extensive data collection on the Quad Cities Unit 2 replacement dryer and the Main Steam Lines. This data was taken with the intent of identifying acoustic sources in the steam system. Review of the data confirmed that vortex shedding coupled column resonance in the relief and safety valve stub pipes were the principal sources of large magnitude acoustic loads in the main steam system. Modifications were developed in sub-scale testing to alter the acoustic properties of the valve standpipes and add acoustic damping to the system. The modifications developed and installed consisted of acoustic side branches that were attached to the Electromatic Relief Valve (ERV) and Main Steam Safety Valve (MSSV) attachment pipes. Subsequent post-modification testing was performed in plant to confirm the effectiveness of the modifications. The modifications have been demonstrated to reduce vibration loads at full Extended Power Up-rate (EPU) conditions to levels below those at Original Licensed Thermal Power (OLTP). (authors)

DeBoo, Guy; Ramsden, Kevin; Gesior, Roman [Exelon Nuclear Engineering Department (United States)

2006-07-01T23:59:59.000Z

435

Direct observation of dynamic surface acoustic wave controlled carrier injection into single quantum posts using phase-resolved optical spectroscopy  

E-Print Network (OSTI)

A versatile stroboscopic technique based on active phase-locking of a surface acoustic wave to picosecond laser pulses is used to monitor dynamic acoustoelectric effects. Time-integrated multi-channel detection is applied to probe the modulation of the emission of a quantum well for different frequencies of the surface acoustic wave. For quantum posts we resolve dynamically controlled generation of neutral and charged excitons and preferential injection of holes into localized states within the nanostructure.

Völk, S; Schülein, F J R; Truong, T A; Kim, H; Petroff, P M; Wixforth, A; Krenner, H J

2010-01-01T23:59:59.000Z

436

Direct observation of dynamic surface acoustic wave controlled carrier injection into single quantum posts using phase-resolved optical spectroscopy  

E-Print Network (OSTI)

A versatile stroboscopic technique based on active phase-locking of a surface acoustic wave to picosecond laser pulses is used to monitor dynamic acoustoelectric effects. Time-integrated multi-channel detection is applied to probe the modulation of the emission of a quantum well for different frequencies of the surface acoustic wave. For quantum posts we resolve dynamically controlled generation of neutral and charged excitons and preferential injection of holes into localized states within the nanostructure.

S. Völk; F. Knall; F. J. R. Schülein; T. A. Truong; H. Kim; P. M. Petroff; A. Wixforth; H. J. Krenner

2010-11-08T23:59:59.000Z

437

Implementation of a Dual Containment/Surveillance System utilizing scene-change detection and radio frequency technology  

SciTech Connect

This paper will examine the implementation of scene-change detection and radio frequency technology within a Dual Containment/Surveillance (C/S) System. Additionally, this paper will examine the human performance factors in the operation of these systems. Currently, Westinghouse Savannah River Company utilizes the Continuous Item Monitoring and Surveillance System (CIMS) in the performance of Dual C/S to monitor special nuclear materials within International Atomic Energy Agency (IAEA) Safeguards and Domestic Safeguards. CIMS is comprised of the Material Monitoring System (MMS) (R), a multi-media electronic surveillance system developed by Sandia National Laboratory which incorporates the use of active seals commonly called Radio Frequency Tamper Indicating Devices (RFTIDs), NT Vision (R) as developed by Los Alamos National Laboratory, a Microsoft Windows NT (R) based operating system providing for domestic scene-change detection and the Digital Multi-Camera Optical Surveillance System (DMOS) (R) which provides scene-change detection for IAEA. Although this paper will focus on the implementation of Dual C/S utilizing the Continuous Item Monitoring and Surveillance System, the necessity for a thorough review of Safeguards and Security requirements with organizations and personnel having minimal to no prior MPC&A training will also be covered. Successful Dual C/S implementation plans must consider not only system design and failure modes, but must also be accompanied with the appropriate ''mind shift'' within operations and technical personnel. This is required to ensure completion of both physical and electronic activities, and system design changes are performed conscientiously and with full awareness of MPC&A requirements.

FITZGERALD, ERIC; KOENIG, RICHARD

2005-06-27T23:59:59.000Z

438

Laser Detection Of Material Thickness  

NLE Websites -- All DOE Office Websites (Extended Search)

Detection Of Material Thickness Detection Of Material Thickness Laser Detection Of Material Thickness There is provided a method for measuring material thickness. Available for thumbnail of Feynman Center (505) 665-9090 Email Laser Detection Of Material Thickness There is provided a method for measuring material thickness comprising: (a) contacting a surface of a material to be measured with a high intensity short duration laser pulse at a light wavelength which heats the area of contact with the material, thereby creating an acoustical pulse within the material: (b) timing the intervals between deflections in the contacted surface caused by the reverberation of acoustical pulses between the contacted surface and the opposite surface of the material: and (c) determining the thickness of the material by calculating the proportion of

439

Application of Precision Mechanical Engineering Techniques to the Design of a Moderate Energy Beam Transport for the FAA Explosive Detection System  

E-Print Network (OSTI)

Application of Precision Mechanical Engineering Techniques to the Design of a Moderate Energy Beam Transport for the FAA Explosive Detection System

Lujan, R

1993-01-01T23:59:59.000Z

440

Acoustically enhanced heat exchange and drying apparatus  

DOE Patents (OSTI)

A heat transfer drying apparatus includes an acoustically augmented heat transfer chamber for receiving material to be dried. The chamber includes a first heat transfer gas inlet, a second heat transfer gas inlet, a material inlet, and a gas outlet which also serves as a dried material and gas outlet. A non-pulsing first heat transfer gas source provides a first drying gas to the acoustically augmented heat transfer chamber through the first heat transfer gas inlet. A valveless, continuous second heat transfer gas source provides a second drying gas to the acoustically augmented heat transfer chamber through the second heat transfer gas inlet. The second drying gas also generates acoustic waves which bring about acoustical coupling with the gases in the acoustically augmented heat transfer chamber. The second drying gas itself oscillates at an acoustic frequency of approximately 180 Hz due to fluid mechanical motion in the gas. The oscillations of the second heat transfer gas coupled to the first heat transfer gas in the acoustically augmented heat transfer chamber enhance heat and mass transfer by convection within the chamber. 3 figs.

Bramlette, T.T.; Keller, J.O.

1987-07-10T23:59:59.000Z

Note: This page contains sample records for the topic "acoustic detection system" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Field testing of component-level model-based fault detection methods for mixing boxes and VAV fan systems  

SciTech Connect

An automated fault detection and diagnosis tool for HVAC systems is being developed, based on an integrated, life-cycle, approach to commissioning and performance monitoring. The tool uses component-level HVAC equipment models implemented in the SPARK equation-based simulation environment. The models are configured using design information and component manufacturers' data and then fine-tuned to match the actual performance of the equipment by using data measured during functional tests of the sort using in commissioning. This paper presents the results of field tests of mixing box and VAV fan system models in an experimental facility and a commercial office building. The models were found to be capable of representing the performance of correctly operating mixing box and VAV fan systems and detecting several types of incorrect operation.

Xu, Peng; Haves, Philip

2002-05-16T23:59:59.000Z

442

An automated system to detect flash floods and alert at-risk communities  

E-Print Network (OSTI)

This thesis describes an automated monitoring station designed to detect flash floods occurring in the Rio Aguan river basin, Honduras. An Atmel microcontroller polls a series of sensors in the river, logging all data for ...

Weaver, Joshua A., 1978-

2005-01-01T23:59:59.000Z

443

A system for the detection of concealed nuclear weapons and fissile material aboard cargo cotainerships  

E-Print Network (OSTI)

A new approach to the detection of concealed nuclear weapons and fissile material aboard cargo containerships is proposed. The ship-based approach removes the constraints of current thinking by addressing the threat of ...

Gallagher, Shawn P., S.M. Massachusetts Institute of Technology

2005-01-01T23:59:59.000Z

444

Tornado Detection Using a Neuro–Fuzzy System to Integrate Shear and Spectral Signatures  

Science Conference Proceedings (OSTI)

Tornado vortices observed from Doppler radars are often associated with strong azimuthal shear and Doppler spectra that are wide and flattened. The current operational tornado detection algorithm (TDA) primarily searches for shear signatures that ...

Yadong Wang; Tian-You Yu; Mark Yeary; Alan Shapiro; Shamim Nemati; Michael Foster; David L. Andra Jr.; Michael Jain

2008-07-01T23:59:59.000Z

445

Towards the development of an explosives detection system using Neutron Resonance Radiography  

E-Print Network (OSTI)

Detection of conventional explosives remains a challenge to air security, as indicated by recent reports detailing lapses in security screening and new requirements that mandate screening 100% of checked luggage. Neutron ...

Raas, Whitney

2007-01-01T23:59:59.000Z

446

IMPLEMENTION AND TESTING OF A FAULT DETECTION SOFTWARE TOOL FOR IMPROVING CONTROL SYSTEM  

E-Print Network (OSTI)

affect the performance of the control scheme and its fault detection sensitivity. 5.2.3 Trend Logging. The process of selecting trend-logging procedures exposed several generic problems faced by building operators

Diamond, Richard

447

Piezoelectric-based in-situ damage detection of composite materials for structural health monitoring systems  

E-Print Network (OSTI)

Cost-effective and reliable damage detection is critical for the utilization of composite materials. This thesis presents the conclusions of an analytical and experimental survey of candidate methods for in-situ damage ...

Kessler, Seth Stovack, 1977-

2002-01-01T23:59:59.000Z

448

Three-Dimensional Nonlinear Acoustical Holography  

E-Print Network (OSTI)

Nearfield Acoustical Holography (NAH) is an acoustic field visualization technique that can be used to reconstruct three-dimensional (3-D) acoustic fields by projecting two-dimensional (2-D) data measured on a hologram surface. However, linear NAH algorithms developed and improved by many researchers can result in significant reconstruction errors when they are applied to reconstruct 3-D acoustic fields that are radiated from a high-level noise source and include significant nonlinear components. Here, planar, nonlinear acoustical holography procedures are developed that can be used to reconstruct 3-D, nonlinear acoustic fields radiated from a high-level noise source based on 2-D acoustic pressure data measured on a hologram surface. The first nonlinear acoustic holography procedure is derived for reconstructing steady-state acoustic pressure fields by applying perturbation and renormalization methods to nonlinear, dissipative, pressure-based Westervelt Wave Equation (WWE). The nonlinear acoustic pressure fields radiated from a high-level pulsating sphere and an infinite-size, vibrating panel are used to validate this procedure. Although the WWE-based algorithm is successfully validated by those two numerical simulations, it still has several limitations: (1) Only the fundamental frequency and its second harmonic nonlinear components can be reconstructed; (2) the application of this algorithm is limited to mono-frequency source cases; (3) the effects of bent wave rays caused by transverse particle velocities are not included; (4) only acoustic pressure fields can be reconstructed. In order to address the limitations of the steady-state, WWE-based procedure, a transient, planar, nonlinear acoustic holography algorithm is developed that can be used to reconstruct 3-D nonlinear acoustic pressure and particle velocity fields. This procedure is based on Kuznetsov Wave Equation (KWE) that is directly solved by using temporal and spatial Fourier Transforms. When compared to the WWE-based procedure, the KWE-based procedure can be applied to multi-frequency source cases where each frequency component can contain both linear and nonlinear components. The effects of nonlinear bent wave rays can be also considered by using this algorithm. The KWE-based procedure is validated by conducting an experiment with a compression driver and four numerical simulations. The numerical and experimental results show that holographically-projected acoustic fields match well with directly-calculated and directly-measured fields.

Niu, Yaying

2013-05-01T23:59:59.000Z

449

Damage monitoring in fibre reinforced mortar by combined digital image correlation and acoustic emission  

E-Print Network (OSTI)

concerns, building facades tend to include multi-layered components such as outer thermal insulation correlation and acoustic emission, Construction and Building Materials vol. 38, pp. 317-380. http for the detection and monitoring of damage and frac- tures in building materials in the prospects of energetic

450

Piezoelectric materials used in underwater acoustic transducers  

Science Conference Proceedings (OSTI)

Piezoelectric materials have been used in underwater acoustic transducers for nearly a century. In this paper, we reviewed four different types of piezoelectric materials: piezoelectric ceramics, single crystals, composites, and polymers, which are widely used in underwater acoustic transducers nowadays. Piezoelectric ceramics are the most dominant material type and are used as a single-phase material or one of the end members in composites. Piezoelectric single crystals offer outstanding electromechanical response but are limited by their manufacturing cost. Piezoelectric polymers provide excellent acoustic impedance matching and transducer fabrication flexibility although their piezoelectric properties are not as good as ceramics and single crystals. Composites combined the merits of ceramics and polymers and are receiving increased attention. The typical structure and electromechanical properties of each type of materials are introduced and discussed with respect to underwater acoustic transducer applications. Their advantages and disadvantages are summarized. Some of the critical design considerations when developing underwater acoustic transducers with these materials are also touched upon.

Li, Huidong; Deng, Zhiqun; Carlson, Thomas J.

2012-07-07T23:59:59.000Z

451

Vehicle exhaust gas chemical sensors using acoustic wave resonators  

DOE Green Energy (OSTI)

Under Sandia`s Laboratory Directed Research and Development (LDRD) program, novel acoustic wave-based sensors were explored for detecting gaseous chemical species in vehicle exhaust streams. The need exists for on-line, real-time monitors to continuously analyze the toxic exhaust gases -- nitrogen oxides (NOx), carbon monoxide (CO), and hydrocarbons (HC) -- for determining catalytic converter efficiency, documenting compliance to emission regulations, and optimizing engine performance through feedback control. In this project, the authors adapted existing acoustic wave chemical sensor technology to the high temperature environment and investigated new robust sensor materials for improving gas detection sensitivity and selectivity. This report describes one new sensor that has potential use as an exhaust stream residual hydrocarbon monitor. The sensor consists of a thickness shear mode (TSM) quartz resonator coated with a thin mesoporous silica layer ion-exchanged with palladium ions. When operated at temperatures above 300 C, the high surface area film catalyzes the combustion of the hydrocarbon vapors in the presence of oxygen. The sensor acts as a calorimeter as the exothermic reaction slightly increases the temperature, stressing the sensor surface, and producing a measurable deviation in the resonator frequency. Sensitivities as high as 0.44 (ppm-{Delta}f) and (ppm-gas) have been measured for propylene gas, with minimum detectable signals of < 50 ppm of propylene at 500 C.

Cernosek, R.W.; Small, J.H.; Sawyer, P.S.; Bigbie, J.R. [Sandia National Labs., Albuquerque, NM (United States); Anderson, M.T. [3M Industrial and Consumer Sector Research Lab., St. Paul, MN (United States)

1998-03-01T23:59:59.000Z

452

Decision support system for water distribution systems based on neural networks and graphs theory for leakage detection  

Science Conference Proceedings (OSTI)

This paper presents an efficient and effective decision support system (DSS) for operational monitoring and control of water distribution systems based on a three layer General Fuzzy Min-Max Neural Network (GFMMNN) and graph theory. The operational monitoring ... Keywords: Decision support system, Graph theory, Loop corrective flows equations, Modeling and simulation, Neural network, Operational control of water distribution systems

Corneliu T. C. Arsene; Bogdan Gabrys; David Al-Dabass

2012-12-01T23:59:59.000Z

453

Near-Surface CO2 Monitoring And Analysis To Detect Hidden Geothermal Systems  

E-Print Network (OSTI)

dioxide flux at the Dixie Valley geothermal field, Nevada;volcanic system, USA Dixie Valley Geothermal Field, USAProvince system like the Dixie Valley (Nevada) geothermal

Lewicki, Jennifer L.; Oldenburg, Curtis M.

2005-01-01T23:59:59.000Z

454

DETERMINING THE UNCERTAINTY OF A GPS-BASED COLLISION VEHICLE DETECTION SYSTEM.  

E-Print Network (OSTI)

??Automotive manufacturers are researching forward collision warning systems (FCWS) to reduce the occurrence of rear-end collision accidents between vehicles. Traditionally these systems use forward scanning… (more)

Amin, Sanket

2011-01-01T23:59:59.000Z

455

Opto-acoustic recanilization delivery system  

DOE Patents (OSTI)

Fiber delivered laser pulses emulsify thrombus by mechanical stresses that include a combination of pressure, tension and shear stress. Laser radiation is delivered to the locality of a thrombus and the radiation is absorbed by blood, blood dot, or other present materials. The combination of a leading pressure wave and subsequent vapor bubble cause efficient, emulsification of thrombus. Operating the laser in a low average power mode alleviates potential thermal complications. The laser is operated in a high repetition rate mode to take advantage of ultrasound frequency effects of thrombus dissolution as well as to decrease the total procedure time. Specific parameter ranges for operation are described. The device includes optical fibers surrounding a lumen intended for flow of a cooling agent. The fibers may be arranged concentrically around the lumen to deliver radiation and heat over as large an area as possible. An alternative design approach incorporates the optical fibers into the wall of the guiding catheter and utilizes the catheter lumen as the cooling channel. An eccentric tip enables rotation of the device to address all parts of the vasculature. The eccentricity can be provided via a variety of means: spring dip, balloon, protrusion, etc.

Visuri, Steven R. (Livermore, CA); Da Silva, Luiz B. (Danville, CA); Celliers, Peter M. (Berkeley, CA); London, Richard A. (Orinda, CA); Benett, William (Livermore, CA); Broughton, Kathryn (Berkeley, CA); Esch, Victor (San Francisco, CA)

2002-01-01T23:59:59.000Z

456

Program on Technology Innovation: Bat Detection and Shutdown System for Utility-Scale Wind Turbines  

Science Conference Proceedings (OSTI)

Although development of renewable energy sources is generally believed to be a sound environmental decision, wind power development has been criticized for posing potential threats to bats. The objective of this project is to develop and deploy an ultrasonic microphone array on a wind turbine. The array will detect bats near the turbine upon which it is deployed and automatically curtail operations when bats are detected in or near the rotor-swept area. The first two objectives of this project were to se...

2010-11-12T23:59:59.000Z

457

Acoustic-wave sensor apparatus for analyzing a petroleum-based composition and sensing solidification of constituents therein  

DOE Patents (OSTI)

An acoustic-wave sensor apparatus and method. The apparatus for analyzing a normally liquid petroleum-based composition includes at least one acoustic-wave device in contact with the petroleum-based composition for sensing or detecting the presence of constituents (e.g. paraffins or petroleum waxes) therein which solidify upon cooling of the petroleum-based composition below a cloud-point temperature. The acoustic-wave device can be a thickness-shear-mode device (also termed a quartz crystal mircrobalance), a surface-acoustic-wave device, an acoustic-plate-mode device or a flexural plate-wave device. Embodiments of the present inventi