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Note: This page contains sample records for the topic "timer motion sensor" 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.


1

Microelectromechanical timer  

DOE Patents (OSTI)

A microminiature timer having an optical readout is disclosed. The timer can be formed by surface micromachining or LIGA processes on a silicon substrate. The timer includes an integral motor (e.g. an electrostatic motor) that can intermittently wind a mainspring to store mechanical energy for driving a train of meshed timing gears at a rate that is regulated by a verge escapement. Each timing gear contains an optical encoder that can be read out with one or more light beams (e.g. from a laser or light-emitting diode) to recover timing information. In the event that electrical power to the timer is temporarily interrupted, the mechanical clock formed by the meshed timing gears and verge escapement can continue to operate, generating accurate timing information that can be read out when the power is restored.

Polosky, Marc A. (Albuquerque, NM); Garcia, Ernest J. (Albuquerque, NM); Plummer, David W. (Albuquerque, NM)

2001-01-01T23:59:59.000Z

2

NUCLEAR BATTERY POWERED TIMERS  

SciTech Connect

During the period from May 1957 to July 1958, four nuclear batiery powered timers were fabricated and tested from two basic designs in the time ranges of onesecond, three-second, annd half-hour intervals. The timers were temperature-tested over a range of -65 to +165 F with accuracics over this temperature range from plus or minus 10 perceat to plus or minus 15 percent. Each unit has a volume of 10 cubic inches, and the timer can be initiated either by an explosive squib or a pull-out wire. At the end of the timing interval, the timer has ann output of 30,000 ergs. The cost of the program was ,000. From the results of this development program, it appears quite feasible to build operable nuclear battery powered timers on a production basis. (auth)

DesJardin, R.L.

1958-09-19T23:59:59.000Z

3

Ultra-wideband radar motion sensor  

DOE Patents (OSTI)

A motion sensor is based on ultra-wideband (UWB) radar. UWB radar range is determined by a pulse-echo interval. For motion detection, the sensors operate by staring at a fixed range and then sensing any change in the averaged radar reflectivity at that range. A sampling gate is opened at a fixed delay after the emission of a transmit pulse. The resultant sampling gate output is averaged over repeated pulses. Changes in the averaged sampling gate output represent changes in the radar reflectivity at a particular range, and thus motion. 15 figs.

McEwan, T.E.

1994-11-01T23:59:59.000Z

4

Automatic Acquisition of Robot Motion and Sensor Models  

Science Conference Proceedings (OSTI)

For accurate self-localization using probabilistic techniques, robots require robust models of motion and sensor characteristics. Such models are sensitive to variations in lighting conditions, terrain and other factors like robot battery strength. Each ...

A. Tuna Ozgelen; Elizabeth Sklar; Simon Parsons

2006-12-01T23:59:59.000Z

5

New portable sensor system for rotational seismic motion measurements  

SciTech Connect

A new mechanical sensor system for recording the rotation of ground velocity has been constructed. It is based on measurements of differential motions between paired sensors mounted along the perimeter of a rigid (undeformable) disk. The elementary sensors creating the pairs are sensitive low-frequency geophones currently used in seismic exploration to record translational motions. The main features of the new rotational seismic sensor system are flat characteristics in the wide frequency range from 1 to 200 Hz and sensitivity limit of the order of 10{sup -8} rad/s. Notable advantages are small dimensions, portability, easy installation and operation in the field, and the possibility of calibrating the geophones in situ simultaneously with the measurement. An important feature of the instrument is that it provides records of translational seismic motions together with rotations, which allows many important seismological applications. We have used the new sensor system to record the vertical rotation velocity due to a small earthquake of M{sub L}=2.2, which occurred within the earthquake swarm in Western Bohemia in autumn 2008. We found good agreement of the rotation record with the transverse acceleration as predicted by theory. This measurement demonstrates that this device has a much wider application than just to prospecting measurements, for which it was originally designed.

Brokesova, Johana [Department of Geophysics, Faculty of Mathematics and Physics, Charles University, V Holesovickach 2, 18000 Prague (Czech Republic); Malek, Jiri [Institute of Rock Structure and Mechanics, Czech Academy of Sciences, V Holesovickach 41, 18209 Prague (Czech Republic)

2010-08-15T23:59:59.000Z

6

Behavior Learning via State Chains from Motion Detector Sensors  

E-Print Network (OSTI)

A method for the automatic discrimination of sensor and system behavior and construction of symbols with semantic meaning from simple sensor data is introduced - SCRS (Semantic Concept Recognition System). The automated method is based on statistical modelling of sensor behavior. A model of a sensorpsilas value sequences is automatically constructed. The modelpsilas structure and parameters are optimized using an minibatch model merging and parameter updating algorithm. Incoming sensor values are then conveyed to the model and the most probable path through the model to some particular state is computed. That classification can be interpreted as a semantic symbol or concept. The SCRS can be used as a security and care system for observation of persons and interpretation of scenarios. An example modelling a motion detector is discussed. The SCRSpsilas method of representing scenarios can be also used in autonomous agents for decision making processes. An example is discussed.

Dietmar Bruckner; Brian Sallans; Roland Lang

2007-01-01T23:59:59.000Z

7

Automatic acquisition of robot motion and sensor A. Tuna Ozgelen, Elizabeth Sklar, and Simon Parsons  

E-Print Network (OSTI)

Automatic acquisition of robot motion and sensor models A. Tuna Ozgelen, Elizabeth Sklar, and Simon Bedford Avenue, Brooklyn NY 11210 USA {tuna,sklar,parsons}@sci.brooklyn.cuny.edu Abstract. For accurate

Parsons, Simon

8

Sensemble : a wireless inertial sensor system for the interactive dance and collective motion analysis  

E-Print Network (OSTI)

The motivation for this project is the recent opportunity to leverage low-power, high-bandwidth RF devices and compact inertial sensors to create a wearable, wireless, motion analysis system meeting the demands of many ...

Aylward, Ryan P

2006-01-01T23:59:59.000Z

9

Phase coded, micro-power impulse radar motion sensor  

DOE Patents (OSTI)

A motion sensing, micro-power impulse radar MIR impresses on the transmitted signal, or the received pulse timing signal, one or more frequencies lower than the pulse repetition frequency, that become intermediate frequencies in a ``IF homodyne`` receiver. Thus, many advantages of classical RF receivers can be thereby be realized with ultra-wide band radar. The sensor includes a transmitter which transmits a sequence of electromagnetic pulses in response to a transmit timing signal at a nominal pulse repetition frequency. A receiver samples echoes of the sequence of electromagnetic pulses from objects within the field with controlled timing, in response to a receive timing signal, and generates a sample signal in response to the samples. A timing circuit supplies the transmit timing signal to the transmitter and supplies the receive timing signal to the receiver. The relative timing of the transmit timing signal and the receive timing signal is modulated between a first relative delay and a second relative delay at an intermediate frequency, causing the receiver to sample the echoes such that the time between transmissions of pulses in the sequence and samples by the receiver is modulated at the intermediate frequency. Modulation may be executed by modulating the pulse repetition frequency which drives the transmitter, by modulating the delay circuitry which controls the relative timing of the sample strobe, or by modulating amplitude of the transmitted pulses. The electromagnetic pulses will have a nominal center frequency related to pulse width, and the first relative delay and the second relative delay between which the timing signals are modulated, differ by less than the nominal pulse width, and preferably by about one-quarter wavelength at the nominal center frequency of the transmitted pulses. 5 figs.

McEwan, T.E.

1996-05-21T23:59:59.000Z

10

Automatic decentralized clustering for wireless sensor networks  

Science Conference Proceedings (OSTI)

We propose a decentralized algorithm for organizing an ad hoc sensor network into clusters. Each sensor uses a random waiting timer and local criteria to determine whether to form a new cluster or to join a current cluster. The algorithm operates without ... Keywords: clustering algorithm, random waiting timer, wireless sensor networks

Chih-Yu Wen; William A. Sethares

2005-10-01T23:59:59.000Z

11

A motion sensor interactive interface for viewing and manipulating protein structural data in 3D  

Science Conference Proceedings (OSTI)

We propose a fun, interactive way to view and alter protein structural data by hand via motion sensors and voice activation. This will enable users to freely zoom, rotate, and view a protein through a friendly hands-on experience. Multiple view and rotation ...

Robyn Moncrief; William Gobber

2012-08-01T23:59:59.000Z

12

Six-Degree-of-Freedom Sensor Fish Design: Governing Equations and Motion Modeling  

DOE Green Energy (OSTI)

The Sensor Fish device is being used at Northwest hydropower projects to better understand the conditions fish experience during passage through hydroturbines and other dam bypass alternatives. Since its initial development in 1997, the Sensor Fish has undergone numerous design changes to improve its function and extend the range of its use. The most recent Sensor Fish design, the three degree of freedom (3DOF) device, has been used successfully to characterize the environment fish experience when passing through turbines, in spill, or in engineered fish bypass facilities at dams. Pacific Northwest National Laboratory (PNNL) is in the process of redesigning the current 3DOF Sensor Fish device package to improve its field performance. Rate gyros will be added to the new six degree of freedom (6DOF) device so that it will be possible to observe the six linear and angular accelerations of the Sensor Fish as it passes the dam. Before the 6DOF Sensor Fish device can be developed and deployed, governing equations of motion must be developed in order to understand the design implications of instrument selection and placement within the body of the device. In this report, we describe a fairly general formulation for the coordinate systems, equations of motion, force and moment relationships necessary to simulate the 6DOF movement of an underwater body. Some simplifications are made by considering the Sensor Fish device to be a rigid, axisymmetric body. The equations of motion are written in the body-fixed frame of reference. Transformations between the body-fixed and interial reference frames are performed using a formulation based on quaternions. Force and moment relationships specific to the Sensor Fish body are currently not available. However, examples of the trajectory simulations using the 6DOF equations are presented using existing low and high-Reynolds number force and moment correlations. Animation files for the test cases are provided in an attached CD. The next phase of the work will focus on the refinement and application of the 6DOF simulator developed in this project. Experimental and computational studies are planned to develop a set of force and moment relationships that are specific to the Sensor Fish body over the range of Reynolds numbers that it experiences. Lab testing of prototype 6DOF Sensor Fish will also allow for refinement of the trajectory simulations through comparison with observations in test flumes. The 6DOF simulator will also be an essential component in tools to analyze field data measured using the next generation Sensor Fish. The 6DOF simulator will be embedded in a moving-machinery computational fluid dynamics (CFD) model for hydroturbines to numerically simulate the 6DOF Sensor Fish.

Deng, Zhiqun; Richmond, Marshall C.; Simmons, Carver S.; Carlson, Thomas J.

2004-08-19T23:59:59.000Z

13

Hydrostatic Level Sensors as High Precision Ground Motion Instrumentation for Tevatron and Other Energy Frontier Accelerators  

Science Conference Proceedings (OSTI)

Particle accelerators require very tight tolerances on the alignment and stability of their elements: magnets, accelerating cavities, vacuum chambers, etc. In this article we describe the Hydrostatic Level Sensors (HLS) for very low frequency measurements used in a variety of facilities at Fermilab. We present design features of the sensors, outline their technical parameters, describe their test and calibration procedures, discuss different regimes of operation and give few illustrative examples of the experimental data. Detail experimental results of the ground motion measurements with these detectors will be presented in subsequent papers.

Volk, James; Hansen, Sten; Johnson, Todd; Jostlein, Hans; Kiper, Terry; Shiltsev, Vladimir; Chupyra, Andrei; Kondaurov, Mikhail; Medvedko, Anatoly; Parkhomchuk, Vasily; Singatulin, Shavkat

2012-01-01T23:59:59.000Z

14

Maintenance and Application Guide for Control Relays and Timers  

Science Conference Proceedings (OSTI)

Reliable performance of control and timing relays is vital to the efficient operation of nuclear plants. This guide provides utilities practical, cost-effective methods for a control relay and timer maintenance program. It can help utilities optimize test and maintenance intervals while limiting expenditures.

1993-10-02T23:59:59.000Z

15

Motion  

Science Conference Proceedings (OSTI)

... Motion ofmagnetic domain wallsin thin, narro wstr ips -p .7/30 Pulse-Dri ven Wall ... domain wallsin thin, narro wstr ips -p .8/30 Pulse-Dri ven Wall ...

2004-05-22T23:59:59.000Z

16

Typhoon: a reliable data dissemination protocol for wireless sensor networks  

Science Conference Proceedings (OSTI)

We present Typhoon, a protocol designed to reliably deliver large objects to all the nodes of a wireless sensor network (WSN). Typhoon uses a combination of spatially-tuned timers, prompt retransmissions, and frequency diversity to reduce contention ...

Chieh-Jan Mike Liang; R?zvan Mus?loiu-E.; Andreas Terzis

2008-01-01T23:59:59.000Z

17

Motion-Tolerant Magnetic Earring Sensor and Wireless Earpiece for Wearable Photoplethysmography  

E-Print Network (OSTI)

This paper addresses the design considerations and critical evaluation of a novel embodiment for wearable photoplethysmography (PPG) comprising a magnetic earring sensor and wireless earpiece. The miniaturized sensor can ...

Poh, Ming-Zher

18

Real-Time Dynamic Visual Tracking Using PSD Sensors and Extended Trapezoidal Motion Planning  

Science Conference Proceedings (OSTI)

A real-time visual servo tracking system for an industrial robot has been implemented using PSD (Position Sensitive Detector) cameras, neural networks, and an extended trapezoidal motion planning method. PSD and directly transduces the light‘s ... Keywords: extended trapezoidal motion planning, locally activated neural network, position sensitive detectors, target tracking, visual servoing

Soo-Hyuk Nam; Se-Young Oh

1999-01-01T23:59:59.000Z

19

Timer-based composition of fault-containing self-stabilizing protocols  

Science Conference Proceedings (OSTI)

One of the desired properties of distributed systems is self-adaptability against faults. Self-stabilizing protocols provide autonomous recovery from any finite number of transient faults. However, in practice, catastrophic faults rarely occur, while ... Keywords: Distributed system, Fault tolerance, Fault-containment, Hierarchical composition, Self-adaptability, Self-stabilization, Synchronizer, Timer

Yukiko Yamauchi; Sayaka Kamei; Fukuhito Ooshita; Yoshiaki Katayama; Hirotsugu Kakugawa; Toshimitsu Masuzawa

2010-05-01T23:59:59.000Z

20

Optimal mobile actuator/sensor network motion strategy for parameter estimation in a class of cyber physical systems  

Science Conference Proceedings (OSTI)

This paper introduces a framework to solve the problem of determining optimal sensors and actuators trajectories so as to estimate a set of unknown parameters in what constitutes a cyber-physical system (CPS). Given a distributed system's set of partial ...

Christophe Tricaud; YangQuan Chen

2009-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Exhibit F-3  

U.S. Energy Information Administration (EIA) Indexed Site

on All Night Outdoor Lights with a Timer, Motion Sensor, or Photosensor Outdoor Gas Light High Intensity Discharge (HID) Outdoor Lights (Such as metal halide or high pressure...

22

A System for Smart Home Control of Appliances based on Timer and Speech Interaction  

E-Print Network (OSTI)

The main objective of this work is to design and construct a microcomputer based system: to control electric appliances such as light, fan, heater, washing machine, motor, TV, etc. The paper discusses two major approaches to control home appliances. The first involves controlling home appliances using timer option. The second approach is to control home appliances using voice command. Moreover, it is also possible to control appliances using Graphical User Interface. The parallel port is used to transfer data from computer to the particular device to be controlled. An interface box is designed to connect the high power loads to the parallel port. This system will play an important role for the elderly and physically disable people to control their home appliances in intuitive and flexible way. We have developed a system, which is able to control eight electric appliances properly in these three modes.

Haque, S M Anamul; Islam, Md Ashraful

2010-01-01T23:59:59.000Z

23

Two terminal micropower radar sensor  

DOE Patents (OSTI)

A simple, low power ultra-wideband radar motion sensor/switch configuration connects a power source and load to ground. The switch is connected to and controlled by the signal output of a radar motion sensor. The power input of the motion sensor is connected to the load through a diode which conducts power to the motion sensor when the switch is open. A storage capacitor or rechargeable battery is connected to the power input of the motion sensor. The storage capacitor or battery is charged when the switch is open and powers the motion sensor when the switch is closed. The motion sensor and switch are connected between the same two terminals between the source/load and ground. 3 figs.

McEwan, T.E.

1995-11-07T23:59:59.000Z

24

Two terminal micropower radar sensor  

SciTech Connect

A simple, low power ultra-wideband radar motion sensor/switch configuration connects a power source and load to ground. The switch is connected to and controlled by the signal output of a radar motion sensor. The power input of the motion sensor is connected to the load through a diode which conducts power to the motion sensor when the switch is open. A storage capacitor or rechargeable battery is connected to the power input of the motion sensor. The storage capacitor or battery is charged when the switch is open and powers the motion sensor when the switch is closed. The motion sensor and switch are connected between the same two terminals between the source/load and ground.

McEwan, Thomas E. (Livermore, CA)

1995-01-01T23:59:59.000Z

25

Pixel-wise Motion Detection in Persistent Aerial Video Surveillance  

SciTech Connect

In ground stabilized WAMI, stable objects with depth appear to have precessive motion due to sensor movement alongside objects undergoing true, independent motion in the scene. Computational objective is to disambiguate independent and structural motion in WAMI efficiently and robustly.

Vesom, G

2012-03-23T23:59:59.000Z

26

Motion graphs  

Science Conference Proceedings (OSTI)

In this paper we present a novel method for creating realistic, controllable motion. Given a corpus of motion capture data, we automatically construct a directed graph called a motion graph that encapsulates connections among the database. The ... Keywords: animation with constraints, motion capture, motion synthesis

Lucas Kovar; Michael Gleicher; Frédéric Pighin

2002-07-01T23:59:59.000Z

27

Navigation protocols in sensor networks  

Science Conference Proceedings (OSTI)

We develop distributed algorithms for adaptive sensor networks that respond to directing a target through a region of space. We model this problem as an online distributed motion planning problem. Each sensor node senses values in its perception space ... Keywords: Sensor networks, motes, navigation, potential field, robotics

Qun Li; Daniela Rus

2005-08-01T23:59:59.000Z

28

Cycle timer for testing electric vehicles. [Device to assist test driver to follow stop-and-go driving cycles  

DOE Green Energy (OSTI)

A cycle timer was developed to assist the driver of an electric vehicle in more accurately following and repeating SAE driving schedules. These schedules require operating an electric vehicle in a selected stop-and-go driving cycle and repeating this pattern until the vehicle ceases to meet the requirements of the cycle. The heart of the system is a programmable read-only memory (PROM) that has the required test profiles permanently recorded on plug-in cards, one card for each different driving schedule. The PROM generates a direct-current analog signal that drives a speedometer displayed on one scale of a dual-movement meter. The second scale of the dual-movement meter displays the actual speed of the vehicle as recorded by the fifth wheel. The vehicle operator controls vehicle speed to match the desired profile speed. One second before a speed transition (such as acceleration to cruise or cruise to coast), a small buzzer sounds for /sup 1///sub 2/ s to forewarn the operator of a change. A longer signal of 1 s is used to emphasize the start of a new cycle. The PROM controls the recycle start time as well as the buzzer activation. The cycle programmer is powered by the test vehicle's 12-V accessory battery, through a 5-V regulator and a 12-V dc-to-dc converter.

Soltis, R.F.

1978-01-01T23:59:59.000Z

29

Ultra-wideband radar sensors and networks  

DOE Patents (OSTI)

Ultra wideband radar motion sensors strategically placed in an area of interest communicate with a wireless ad hoc network to provide remote area surveillance. Swept range impulse radar and a heart and respiration monitor combined with the motion sensor further improves discrimination.

Leach, Jr., Richard R; Nekoogar, Faranak; Haugen, Peter C

2013-08-06T23:59:59.000Z

30

Recent ground motion studies at Fermilab  

SciTech Connect

Understanding slow and fast ground motion is important for the successful operation and design for present and future colliders. Since 2000 there have been several studies of ground motion at Fermilab. Several different types of HLS (hydro static level sensors) have been used to study slow ground motion (less than 1 hertz) seismometers have been used for fast (greater than 1 hertz) motions. Data have been taken at the surface and at locations 100 meters below the surface. Data of recent slow ground motion measurements with HLSs, many years of alignment data and results of the ATL-analysis are presented and discussed.

Shiltsev, V.; Volk, J.; /Fermilab; Singatulin, S.; /Novosibirsk, IYF

2009-04-01T23:59:59.000Z

31

Optimizing sensor movement planning for energy efficiency  

Science Conference Proceedings (OSTI)

Conserving the energy for motion is an important yet not-well-addressed problem in mobile sensor networks. In this article, we study the problem of optimizing sensor movement for energy efficiency. We adopt a complete energy model to characterize the ... Keywords: Mobile sensor, energy efficiency

Guiling Wang; Mary Jane Irwin; Haoying Fu; Piotr Berman; Wensheng Zhang; Tom La Porta

2011-02-01T23:59:59.000Z

32

Motion artifact cancellation for wearable photoplethysmographic sensor  

E-Print Network (OSTI)

Photoplethysmography (PPG) is a non-invasive and unobtrusive technique to measure heart rate from the surface of the skin, by exposing a section of the skin to an LED light and measuring the changes in reflected light due ...

Kuboyama, Yuta

2010-01-01T23:59:59.000Z

33

Field analysis of occupancy sensor operation: Parameters affecting lighting energy savings  

SciTech Connect

A field study of the actual lighting savings achievable from occupancy sensor use was performed by Pacific Northwest Laboratory (PNL) for the US Department of Energy (DOE) on the Hanford Site near Richland, Washington. The study involved two seperate field assessments. The objective of the first test was to assess and effectively quantify the potential ``wasted-light`` hours associated with different occupant and space types associated with occupancy sensor control installations. These quantities are the primary factor in determining actual lighting energy savings associated with occupancy lighting control. The second test was conducted to explore the potential additional savings from more sensitive sensor equipment or better equipment adjustment that might reduce the need for delay timers. This information provides quantitative insight into the energy savings lost because of the limitations of current sensing equipment.

Richman, E.E.; Dittmer, A.L.; Keller, J.M.

1995-07-01T23:59:59.000Z

34

Field analysis of occupancy sensor operation: Parameters affecting lighting energy savings  

SciTech Connect

This study was designed to assess the potential energy savings from the use of lighting occupancy sensor control in Hanford Site facilities. The final results of the study provide useful information for assessing the cost-effective use of occupancy sensor lighting control. The results also include an assessment of the total potential savings from the application of sensors across the entire site. The study involved placing sensor test equipment in multiple office spaces in eight buildings that are part of the Hanford contractor facilities. Further testing was conducted to assess the effects of timer sensitivity adjustments on potential lighting energy savings. The results of this test indicated that up to 100% additional wasted-light energy can be saved by using timer sensitivity settings as low as 2.5 min, which is less than standard factory settings of usually 10 to 20 min. The analysis indicates that savings from lighting operations are affected by the work function and number of occupants in occupied spaces. The availability of daylight in a building space does not appear to have any noticeable aggregate effect on the quantity of wasted-light hours in occupied or unoccupied spaces. An assessment of the total potential savings for the entire Hanford Site included life-cycle costing that followed the federally accepted methodology. The life-cycle cost analysis was performed for a set of possible lighting wattages across the building spaces and occupant types identified from the initial analysis. Under current conditions, the potential savings is estimated to be $525,812/yr at an initial cost of $976,824. The total Net Present Value for the site is estimated at $3,539,926 with a simple payback period of 1.85 years.

Richman, E.E.; Dittmer, A.L.; Keller, J.M.

1994-09-01T23:59:59.000Z

35

Hydrogen Sensor  

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

sensor for detectingquantitating hydrogen and hydrogen isotopes includes a sampling line and a microplasma generator that excites hydrogen from a gas sample and produces...

36

High resolution digital delay timer  

DOE Patents (OSTI)

Method and apparatus are provided for generating an output pulse following a trigger pulse at a time delay interval preset with a resolution which is high relative to a low resolution available from supplied clock pulses. A first lumped constant delay (20) provides a first output signal (24) at predetermined interpolation intervals corresponding to the desired high resolution time interval. Latching circuits (26, 28) latch the high resolution data (24) to form a first synchronizing data set (60). A selected time interval has been preset to internal counters (142, 146, 154) and corrected for circuit propagation delay times having the same order of magnitude as the desired high resolution. Internal system clock pulses (32, 34) count down the counters to generate an internal pulse delayed by an interval which is functionally related to the preset time interval. A second LCD (184) corrects the internal signal with the high resolution time delay. A second internal pulse is then applied to a third LCD (74) to generate a second set of synchronizing data (76) which is complementary with the first set of synchronizing data (60) for presentation to logic circuits (64). The logic circuits (64) further delay the internal output signal (72) to obtain a proper phase relationship of an output signal (80) with the internal pulses (32, 34). The final delayed output signal (80) thereafter enables the output pulse generator (82) to produce the desired output pulse (84) at the preset time delay interval following input of the trigger pulse (10, 12).

Martin, Albert D. (Los Alamos, NM)

1988-01-01T23:59:59.000Z

37

Speed control and scheduling of data mules in sensor networks  

Science Conference Proceedings (OSTI)

Unlike traditional multihop forwarding among stationary sensor nodes, use of mobile devices for data collection in wireless sensor networks has recently been gathering more attention. The use of mobility significantly reduces the energy consumption at ... Keywords: Controlled mobility, linear programming, motion planning, scheduling, simulation

Ryo Sugihara; Rajesh K. Gupta

2010-08-01T23:59:59.000Z

38

Spatially Distributed Measurements of Platform Motion for the Correction of Ship-Based Turbulent Fluxes  

Science Conference Proceedings (OSTI)

A method for determining the angular offsets between measurement axes for multiple motion sensing systems and a sonic anemometer using underway data is demonstrated. This enables a single angular rate sensor to be used with spatially separated ...

Ian M. Brooks

2008-11-01T23:59:59.000Z

39

Motion in Quantum Gravity  

E-Print Network (OSTI)

We tackle the question of motion in Quantum Gravity: what does motion mean at the Planck scale? Although we are still far from a complete answer we consider here a toy model in which the problem can be formulated and resolved precisely. The setting of the toy model is three dimensional Euclidean gravity. Before studying the model in detail, we argue that Loop Quantum Gravity may provide a very useful approach when discussing the question of motion in Quantum Gravity.

Karim Noui

2010-03-31T23:59:59.000Z

40

Intelligent Robot Vision Sensors in VLSI  

Science Conference Proceedings (OSTI)

Traditional approaches for solving real-world problems using computer vision have depended heavily on CCD cameras and workstations. As the computation power of workstations doubles every 1.5 years, they are now better able to handle the large amount ... Keywords: centroid chip, computational sensors, focal-plane image processing, motion chip, robot vision, spatiotemporal image processing chip, vision chips

Ralph Etienne-Cummings

1999-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Analog Integrated 2-D Optical Flow Sensor  

Science Conference Proceedings (OSTI)

I present a new focal-plane analog very-large-scale-integrated (aVLSI) sensor that estimates optical flow in two visual dimensions. Its computational architecture consists of a two-layer network of locally connected motion units that collectively ... Keywords: constraint satisfaction, neuromorphic, parallel computation, recurrent network, regularization

Alan A. Stocker

2006-02-01T23:59:59.000Z

42

Sensors, Instrumentation Systems  

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

Sensors, Instrumentation Systems science-innovationassetsimagesicon-science.jpg Sensors, Instrumentation Systems National security depends on science and technology. The...

43

Chemical sensors  

DOE Patents (OSTI)

Sensors responsive to small changes in the concentration of chemical species are disclosed, comprising (a) a mechanochemically responsive polymeric film capable of expansion or contraction in response to a change in its chemical environment, operatively coupled to (b) a transducer capable of directly converting said expansion or contraction to a measurable electrical response.

Lowell, Jr., James R. (Bend, OR); Edlund, David J. (Bend, OR); Friesen, Dwayne T. (Bend, OR); Rayfield, George W. (Bend, OR)

1991-01-01T23:59:59.000Z

44

Sensor apparatus  

DOE Patents (OSTI)

A sensor apparatus and method for detecting an environmental factor is shown that includes an acoustic device that has a characteristic resonant vibrational frequency and mode pattern when exposed to a source of acoustic energy and, further, when exposed to an environmental factor, produces a different resonant vibrational frequency and/or mode pattern when exposed to the same source of acoustic energy.

Deason, Vance A. (Idaho Falls, ID); Telschow, Kenneth L. (Idaho Falls, ID)

2009-12-22T23:59:59.000Z

45

Ground Motion Workshop  

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

2nd Advanced ICFA Beam Dynamics Workshop 2nd Advanced ICFA Beam Dynamics Workshop on Ground Motion in Future Accelerators November 6 - 9, 2000 SLAC Coordinators: Andrei Seryi & Tor Raubenheimer Proceedings Updated June 26, 2001 Agenda and Presentations Workshop photos Summaries Useful links Poster Goals Introduction to the problems Structure Registration Registered participants Committees Location, Accommodations and Travel Workshop on Ground Motion in Future Accelerators A workshop was held at SLAC that was devoted to ground motion and its effects on future accelerators. Ground motion and vibration can be a limiting effect in synchrotron light sources, hadron circular colliders, and electron/positron linear colliders. Over the last several years, there has been significant progress in the understanding of the ground motion and its effects, however, there are

46

Chemical sensors  

DOE Patents (OSTI)

Sensors responsive to small changes in the concentration of chemical species are disclosed, comprising a mechanicochemically responsive polymeric film capable of expansion or contraction in response to a change in its chemical environment, either operatively coupled to a transducer capable of directly converting the expansion or contraction to a measurable electrical or optical response, or adhered to a second inert polymeric strip, or doped with a conductive material. 12 figs.

Lowell, J.R. Jr.; Edlund, D.J.; Friesen, D.T.; Rayfield, G.W.

1992-06-09T23:59:59.000Z

47

Chemical sensors  

DOE Patents (OSTI)

Sensors responsive to small changes in the concentration of chemical species are disclosed, comprising a mechanicochemically responsive polymeric film capable of expansion or contraction in response to a change in its chemical environment, either operatively coupled to a transducer capable of directly converting the expansion or contraction to a measurable electrical or optical response, or adhered to a second inert polymeric strip, or doped with a conductive material.

Lowell, Jr., James R. (Bend, OR); Edlund, David J. (Bend, OR); Friesen, Dwayne T. (Bend, OR); Rayfield, George W. (Eugene, OR)

1992-01-01T23:59:59.000Z

48

Humidity Sensors  

Science Conference Proceedings (OSTI)

Table 21   Applications for humidity sensors...parts 5 to 40 0 to 50 Magnetic heads, LSIs, ICs Agriculture, forestry stockbreeding Greenhouse air conditioning 5 to 40 0 to 100 Air conditioning Dew prevention in tealeaf growing -10 to 60 50 to 100 Dew prevention Broiler farming 20 to 25 40 to 70 Health control Measurement Thermostatic bath -5 to 100 0 to...

49

Programmable motion effects  

Science Conference Proceedings (OSTI)

Although animation is one of the most compelling aspects of computer graphics, the possibilities for depicting the movement that make dynamic scenes so exciting remain limited for both still images and animations. In our work, we experiment with motion ...

Johannes Schmid; Robert W. Sumner; Huw Bowles; Markus Gross

2010-07-01T23:59:59.000Z

50

Wireless sensor network survey  

Science Conference Proceedings (OSTI)

A wireless sensor network (WSN) has important applications such as remote environmental monitoring and target tracking. This has been enabled by the availability, particularly in recent years, of sensors that are smaller, cheaper, and intelligent. These ... Keywords: Protocols, Sensor network deployment, Sensor network services, Survey, Wireless sensor network

Jennifer Yick; Biswanath Mukherjee; Dipak Ghosal

2008-08-01T23:59:59.000Z

51

Hydrogen sensor  

DOE Patents (OSTI)

A hydrogen sensor for detecting/quantitating hydrogen and hydrogen isotopes includes a sampling line and a microplasma generator that excites hydrogen from a gas sample and produces light emission from excited hydrogen. A power supply provides power to the microplasma generator, and a spectrometer generates an emission spectrum from the light emission. A programmable computer is adapted for determining whether or not the gas sample includes hydrogen, and for quantitating the amount of hydrogen and/or hydrogen isotopes are present in the gas sample.

Duan, Yixiang (Los Alamos, NM); Jia, Quanxi (Los Alamos, NM); Cao, Wenqing (Katy, TX)

2010-11-23T23:59:59.000Z

52

Virtual Sensors: Abstracting Data from Physical Sensors  

Science Conference Proceedings (OSTI)

Sensor networks are becoming increasingly pervasive. Existing methods of aggregation in sensor networks offer mostly standard mathematical operators over homogeneous data types. In this paper, we instead focus on supporting emerging scenarios in which ...

Sanem Kabadayi; Adam Pridgen; Christine Julien

2006-06-01T23:59:59.000Z

53

Plug & Play Sensors Sites  

Science Conference Proceedings (OSTI)

... Documents. Plug & Play Sensors Sites. ... Plug & Play Sensors Sites. By selecting some of the links below, you will be leaving NIST webspace. ...

2012-06-05T23:59:59.000Z

54

Dynamic sensor tasking in heterogeneous, mobile sensor networks  

E-Print Network (OSTI)

Modern sensor environments often attempt to combine several sensors into a single sensor network. The nodes of this network are generally heterogeneous and may vary with respect to sensor complexity, sensor operational ...

Jones, Peter B. (Peter B.), S.M., Massachusetts Institute of Technology

2005-01-01T23:59:59.000Z

55

VIIRS Captures Aurora Motions  

Science Conference Proceedings (OSTI)

It has been found that the Day/Night Band of the Visible Infrared Imaging Radiometer Suite is capable of observing rapid motions of the aurora. The images that led to this discovery are shown. Shifts in the apparent position of the aurora boundary between ...

Curtis J. Seaman; Steven D. Miller

56

spatial experience motion body  

Science Conference Proceedings (OSTI)

elements were examined in terms of architectural space and in respect to the tension .... The tension or energy fields of the inserted objects enter into a relationship and ...... The search for form based on the flows of motion and other external ...

57

The aMotion toolkit: painting with affective motion textures  

Science Conference Proceedings (OSTI)

Visual artists and designers frequently use carefully crafted motion textures -- patterns of ambient motion throughout a scene -- to imbue the atmosphere with affect. The design of such ambient visual cues is an elusive topic that has been studied by ...

Matt Lockyer; Lyn Bartram

2012-06-01T23:59:59.000Z

58

CEUS Ground Motion Project  

Science Conference Proceedings (OSTI)

Three utilities are currently pursuing early site permits (ESPs) for possible siting of new nuclear power plant facilities in the central and eastern United States (CEUS). The geological, seismological, and engineering characteristics of a site and its environs must be investigated in sufficient scope and detail. These investigations are needed to adequately evaluate a proposed site and to provide sufficient information for estimating the site's safe shutdown earthquake (SSE) ground motion. Nuclear Regul...

2003-12-02T23:59:59.000Z

59

Liouville Brownian motion  

E-Print Network (OSTI)

We construct a stochastic process, called the Liouville Brownian motion which we conjecture to be the scaling limit of random walks on large planar maps which are embedded in the euclidean plane or in the sphere in a conformal manner. Our construction works for all universality classes of planar maps satisfying $\\gamma standard two-dimensional brownian motion $B_t$ depending on the local behaviour of the Liouville measure "$M_\\gamma(dz) = e^{\\gamma X} dz$" (where $X$ is a Gaussien Free Field, say on $\\S^2$). A significant part of the paper focuses on extending this construction simultaneously to all points $x\\in \\R^2$ or $\\S^2$ in such a way that one obtains a semi-group $P_\\t$ (the Liouville semi-group). We prove that the associated Markov process is a Feller diffusion for all $\\gammaright quantum gravity diffusion to consider). This Liouville Brownian motion enables us to give sense to part of the celebrated Feynman path integrals which are at the root of Liouville quantum gravity, the Liouville Brownian ones. Finally we believe that this work sheds some new light on the difficult problem of constructing a quantum metric out of the exponential of a Gaussian Free Field (see conjecture \\ref{c.metric}).

Christophe Garban; Rémi Rhodes; Vincent Vargas

2013-01-14T23:59:59.000Z

60

Pit disassembly motion control  

Science Conference Proceedings (OSTI)

A Department of Energy (DOE) Pit Disassembly and Conversion Facility (PDCF) is being designed for the Savannah River Site in South Carolina. The facility will recover plutonium from excess nuclear weapon pits defined in START II and START III treaties. The plutonium will be stored and used to produce mixed oxide reactor fuel at another new DOE facility. Because of radiation dose issues, much of the pit disassembly work and material transfer will be automated. Automated material handling systems will interface with disassembly lathes, conversion reactors that produce oxide for storage, robotic container welding stations, vault retrieval systems, and nondestructive assay (NDA) instrumentation. The goal is to use common motion control hardware for material transfer and possibly common motion controllers for the unique PDCF systems. The latter is complicated by the different directions manufactures are considering for distributed control, such as Firewire, SERCOS, etc., and by the unique control requirements of machines such as lathes compared to controls for an integrated NDA system. The current design approach is to standardize where possible, use network cables to replace wire bundles where possible, but to first select hardware and motion controllers that meet specific machine or process requirements.

Christensen, L. (Lowell); Pittman, P. C. (Pete C.)

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Invertible motion blur in video  

Science Conference Proceedings (OSTI)

We show that motion blur in successive video frames is invertible even if the point-spread function (PSF) due to motion smear in a single photo is non-invertible. Blurred photos exhibit nulls (zeros) in the frequency transform of the PSF, leading to ... Keywords: PSF, PSF estimation, computational photography, invertibility, motion deblurring

Amit Agrawal; Yi Xu; Ramesh Raskar

2009-07-01T23:59:59.000Z

62

Painterly animation using motion maps  

Science Conference Proceedings (OSTI)

Starting from an input video, we replicate the manual technique of paint-on-glass animation. Motion maps are used to represent the regions where changes occur between frames. Edges are the key to identifying frame-to-frame changes, and a strong motion ... Keywords: Metamorphosis, Motion map, Non-photorealistic rendering & animation, Painterly rendering & animation, Strong edges

Youngsup Park; Kyunghyun Yoon

2008-01-01T23:59:59.000Z

63

Demonstration of Motion Transduction Based on Parametrically Coupled Mechanical Resonators  

E-Print Network (OSTI)

Universal sensing the motion of mechanical resonators with high precision and low back-action is of paramount importance in ultra-weak signal detection which plays a fundamental role in modern physics. Here we present a universal scheme that transfer mechanically the motion of the resonator not directly measurable to the one can be precisely measured using mechanical frequency conversion. Demonstration of the scheme at room temperature shows that both the motion imprecision and the back-action force are below the intrinsic level of the objective resonator, which agree well with our theoretical prediction. The scheme developed here provides an effective interface between an arbitrary mechanical resonator and a high quantum efficient displacement sensor, and is expected to find extensive applications in high-demanding mechanical-based force measurements.

Pu Huang; Pengfei Wang; Jingwei Zhou; Zixiang Wang; Chenyong Ju; Zimeng Wang; Yang Shen; Changkui Duan; Jiangfeng Du

2013-05-11T23:59:59.000Z

64

A generative model for dynamic canvas motion  

Science Conference Proceedings (OSTI)

We present techniques for constructing realistic canvas and paper models and for enabling interactive dynamic canvas motion. Dynamic canvas motion means that there is a correspondence between the motion of canvas features and the motion of the models ...

Matthew Kaplan; Elaine Cohen

2005-05-01T23:59:59.000Z

65

Sensor-based global planning for mobile robot navigation  

Science Conference Proceedings (OSTI)

The proposed algorithm integrates in a single planner the global motion planning and local obstacle avoidance capabilities. It efficiently guides the robot in a dynamic environment. This eliminates some of the traditional problems of planned architectures ... Keywords: Fast marching, Sensor-based global path planner, mobile manipulators, mobile robots

S. Garrido; L. Moreno; D. Blanco; M. l. Munoz

2007-03-01T23:59:59.000Z

66

Aircraft Cabin Environmental Quality Sensors  

E-Print Network (OSTI)

for ACEQ sensors than for chem-bio sensors 1 Under groundlocations In contrast to chem-bio sensors, false positives (or Implementation, Part 1: Chem. -Bio-Sensors, ACER Report,

Gundel, Lara

2010-01-01T23:59:59.000Z

67

New Methods in Motion Tracking to Generate Motion-Corrected ...  

can result in measurement error or inability to properly track motion ... modeling of human diseases Patents James S. Goddard and Justin S. Baba. ...

68

Giant magnetoresistive sensor  

DOE Patents (OSTI)

A magnetoresistive sensor element with a three-dimensional micro-architecture is capable of significantly improved sensitivity and highly localized measurement of magnetic fields. The sensor is formed of a multilayer film of alternately magnetic and nonmagnetic materials. The sensor is optimally operated in a current perpendicular to plane mode. The sensor is useful in magnetic read/write heads, for high density magnetic information storage and retrieval.

Stearns, Daniel G. (Los Altos, CA); Vernon, Stephen P. (Pleasanton, CA); Ceglio, Natale M. (Livermore, CA); Hawryluk, Andrew M. (Modesto, CA)

1999-01-01T23:59:59.000Z

69

Digital Sensor Technology  

SciTech Connect

The nuclear industry has been slow to incorporate digital sensor technology into nuclear plant designs due to concerns with digital qualification issues. However, the benefits of digital sensor technology for nuclear plant instrumentation are substantial in terms of accuracy, reliability, availability, and maintainability. This report demonstrates these benefits in direct comparisons of digital and analog sensor applications. It also addresses the qualification issues that must be addressed in the application of digital sensor technology.

Ted Quinn; Jerry Mauck; Richard Bockhorst; Ken Thomas

2013-07-01T23:59:59.000Z

70

Sensor readout detector circuit  

DOE Patents (OSTI)

A sensor readout detector circuit is disclosed that is capable of detecting sensor signals down to a few nanoamperes or less in a high (microampere) background noise level. The circuit operates at a very low standby power level and is triggerable by a sensor event signal that is above a predetermined threshold level. A plurality of sensor readout detector circuits can be formed on a substrate as an integrated circuit (IC). These circuits can operate to process data from an array of sensors in parallel, with only data from active sensors being processed for digitization and analysis. This allows the IC to operate at a low power level with a high data throughput for the active sensors. The circuit may be used with many different types of sensors, including photodetectors, capacitance sensors, chemically-sensitive sensors or combinations thereof to provide a capability for recording transient events or for recording data for a predetermined period of time following an event trigger. The sensor readout detector circuit has applications for portable or satellite-based sensor systems. 6 figs.

Chu, D.D.; Thelen, D.C. Jr.

1998-08-11T23:59:59.000Z

71

Sensor readout detector circuit  

DOE Patents (OSTI)

A sensor readout detector circuit is disclosed that is capable of detecting sensor signals down to a few nanoamperes or less in a high (microampere) background noise level. The circuit operates at a very low standby power level and is triggerable by a sensor event signal that is above a predetermined threshold level. A plurality of sensor readout detector circuits can be formed on a substrate as an integrated circuit (IC). These circuits can operate to process data from an array of sensors in parallel, with only data from active sensors being processed for digitization and analysis. This allows the IC to operate at a low power level with a high data throughput for the active sensors. The circuit may be used with many different types of sensors, including photodetectors, capacitance sensors, chemically-sensitive sensors or combinations thereof to provide a capability for recording transient events or for recording data for a predetermined period of time following an event trigger. The sensor readout detector circuit has applications for portable or satellite-based sensor systems.

Chu, Dahlon D. (Albuquerque, NM); Thelen, Jr., Donald C. (Bozeman, MT)

1998-01-01T23:59:59.000Z

72

High temperature sensor  

DOE Patents (OSTI)

A high temperature sensor includes a pair of electrical conductors separated by a mass of electrical insulating material. The insulating material has a measurable resistivity within the sensor that changes in relation to the temperature of the insulating material within a high temperature range (1,000 to 2,000 K.). When required, the sensor can be encased within a ceramic protective coating.

Tokarz, Richard D. (West Richland, WA)

1982-01-01T23:59:59.000Z

73

Online distributed sensor selection  

Science Conference Proceedings (OSTI)

A key problem in sensor networks is to decide which sensors to query when, in order to obtain the most useful information (e.g., for performing accurate prediction), subject to constraints (e.g., on power and bandwidth). In many applications the utility ... Keywords: approximation algorithms, distributed multiarmed bandit algorithms, sensor networks, submodular optimization

Daniel Golovin; Matthew Faulkner; Andreas Krause

2010-04-01T23:59:59.000Z

74

Sensor mount assemblies and sensor assemblies  

DOE Patents (OSTI)

Sensor mount assemblies and sensor assemblies are provided. In an embodiment, by way of example only, a sensor mount assembly includes a busbar, a main body, a backing surface, and a first finger. The busbar has a first end and a second end. The main body is overmolded onto the busbar. The backing surface extends radially outwardly relative to the main body. The first finger extends axially from the backing surface, and the first finger has a first end, a second end, and a tooth. The first end of the first finger is disposed on the backing surface, and the tooth is formed on the second end of the first finger.

Miller, David H. (Redondo Beach, CA)

2012-04-10T23:59:59.000Z

75

Remotely controlled sensor apparatus for use in dig-face characterization system  

DOE Patents (OSTI)

A remotely controlled sensor platform apparatus useful in a dig-face characterization system is deployed from a mobile delivery device such as standard heavy construction equipment. The sensor apparatus is designed to stabilize sensors against extraneous motions induced by heavy equipment manipulations or other outside influences, and includes a terrain sensing and sensor elevation control system to maintain the sensors in close ground proximity. The deployed sensor apparatus is particularly useful in collecting data in work environments where human access is difficult due to the presence of hazardous conditions, rough terrain, or other circumstances that prevent efficient data collection by conventional methods. Such work environments include hazardous waste sites, unexploded ordnance sites, or construction sites. Data collection in these environments by utilizing the deployed sensor apparatus is desirable in order to protect human health and safety, or to assist in planning daily operations to increase efficiency. 13 figs.

Josten, N.E.; Svoboda, J.M.

1999-05-25T23:59:59.000Z

76

Field Tests of a New Type of Graphite-Fiber Electrode for Measuring Motionally Induced Voltages  

Science Conference Proceedings (OSTI)

On the basis of a field experiment in a tidal channel, comparisons have been undertaken between a new type of graphite-fiber electrode and conventional Ag/AgCl sensors for measurements of motionally induced voltages. The fiber electrode works ...

Lennart Crona; Tim Fristedt; Peter Lundberg; Peter Sigray

2001-01-01T23:59:59.000Z

77

Session Timer | Princeton Plasma Physics Lab  

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

or for questions and answers. The system is a computer software program, written in Java, that can run on Windows, Mac, and Linux operating systems. No.: M-804 Inventor(s):...

78

Correspondence-free Structure from Motion  

Science Conference Proceedings (OSTI)

We present a novel approach for the estimation of 3D-motion directly from two images using the Radon transform. The feasibility of any camera motion is computed by integrating over all feature pairs that satisfy the epipolar constraint. This integration ... Keywords: correspondence-free motion, harmonic analysis, motion estimation, registration, structure from motion

Ameesh Makadia; Christopher Geyer; Kostas Daniilidis

2007-12-01T23:59:59.000Z

79

Two applications of the Fabry-Perot interferometric sensor  

E-Print Network (OSTI)

Two important applications of the fiber Fabry-Perot Interferometer (FFPI) sensor are investigated: (1) an optical binary switch for aerospace application, and (2) an FFPI weigh-in-motion sensor for measuring the weight of trucks traveling down a highway. In the fiber optical switch, the FFPI sensor is bonded to a copper cantilever to sense the elongation of cavity length induced by force applied to the end of the cantilever via a pushed button. Light from a superluminescent diode light source passes through a scanned Michelson interferometer and is reflected from a sensing FFPI and a reference FFPI to produce a fringe pattern. A secondary interferometer uses a distributed feedback laser light source to compensate for irregularities in the mechanical scanning rate of the moving stage to achieve precision measurement of the optical path difference. The system is calibrated by applying known weights to the cantilever. The elongation measured by the FFPI sensor shows excellent linearity as a function of the force applied, and little hysteresis was observed. By comparing the measured force to a threshold, the system produces a binary signal that indicates the state of the pilotactuated system; i. e., whether or not the button has been pushed. In FFPI weigh-in-motion sensors system, the FFPI sensors are installed in metal bars so that they will experience the strain induced by applied loads and are connected to the Signal Conditioning Unit (SCU). The SCU determines the induced phase shift in the FFPI and produces voltage outputs proportional to the phase shifts. Laboratory Material Testing System tests show that the fiber optic sensor response is a fairly linear function of the axial displacement. In highway tests the FFPI sensors showed strong responses and consistently reproduced the expected characteristics of truck wheel crossings. A falling weight deflectometer was used to calibrate the sensor response and predict unknown loads. All sensors in steel bars and aluminum bars showed excellent repeatability and accurate predictions, with an average relative percentage error within 2%. The study on sensor response variation with applied load positions shows a bell shaped distribution. Truck tests on the road sensors indicate that the repeatability of wheel crossings at similar position is good. The sensor can accurately measure axle spacing, speed, and truck class.

Xie, Zhaoxia

2006-08-01T23:59:59.000Z

80

Polyaniline-Based Nanocomposite Strain Sensors  

E-Print Network (OSTI)

Health monitoring is an important field as small failures can build up and cause a catastrophic failure. Monitoring the health of a structure can be done by measuring the motion of the structure through the use of strain sensors. The limitations of current strain sensing technology; cost, size, form could be improved. This research intends to improve current strain sensing technology by creating a conductive polymer composite that can be used monitor health in structures. Conductive polymer composites are a viable candidate due to the low costs of manufacturing, tailorable mechanical and electrical properties, and uniform microstructure. This work will focus on determining if a all-polymer composite can be used as a strain sensor, and investigating the effects of filler, doping and latex effect the electrical and strain sensing properties. Strain sensors were prepared from polyaniline (PANI)-latex composites, the morphology, mechanical, electrical and strain sensing properties were evaluated. These strain sensors were capable of repeatable measuring strain to 1% and able to measure strain until the substrates failure at 5% strain, with a sensitivity (measured by gauge factor) of between 6-8 (metal foil strain sensors have a gauge factor of 2). The best performing strain sensor consisted of 4 wt.% polyaniline. This composition had the best combination of gauge factor, linearity, and signal stability. Further experiments were conducting to see if improvements could be made by changing the polymer used for the matrix material, the molecular weight and the level of doping of the polyaniline. Results indicate through differences in strain sensing response; lower hysteresis and unrecoverable conductivity, that polyaniline latex composites can be adjusted to further improve their performance. The polyaniline-latex composites were able to repeatable measure strain to 1%, as well as strain until failure and with gauge factor between 6-8, and a 70% increase in signal at failure. These properties make these composites viable candidates to monitor health in structures, buildings, bridges, and damns.

Levin, Zachary Solomon

2011-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Embedded Sensor Technology Evaluation  

Science Conference Proceedings (OSTI)

Fiber Sensors are poised to be used in future LEPs. The three primary vehicles for fiber sensors are Department 1, Joint Test Assembly (JTA), and Shelf Life (SL). The National Security Enterprise (NSE) community plans to incorporate optical sensors or systems into these vehicles. Additionally, hermetic sealing of optical systems is required if optical technology is to be integrated into LEP and future weapons applications. Hermetic seals will reduce the long-term risk of contamination which can degrade or incapacitate optical components. This study was funded through the Kansas City Plant's (KCP) ESC work package between 2007 and 2009 to develop optical sensors, identify commercial fiber sensors and hermetic connectors, and qualify these sensors against likely weapon lifetime environments.

Kennedy, Chris

2010-01-12T23:59:59.000Z

82

Remote electrochemical sensor  

DOE Patents (OSTI)

An electrochemical sensor for remote detection, particularly useful for metal contaminants and organic or other compounds. The sensor circumvents technical difficulties that previously prevented in-situ remote operations. The microelectrode, connected to a long communications cable, allows convenient measurements of the element or compound at timed and frequent intervals and instrument/sample distances of ten feet to more than 100 feet. The sensor is useful for both downhole groundwater monitoring and in-situ water (e.g., shipboard seawater) analysis.

Wang, Joseph (Las Cruces, NM); Olsen, Khris (Richland, WA); Larson, David (Las Cruces, NM)

1997-01-01T23:59:59.000Z

83

High-temperature sensor  

DOE Patents (OSTI)

A high temperature sensor is described which includes a pair of electrical conductors separated by a mass of electrical insulating material. The insulating material has a measurable resistivity within the sensor that changes in relation to the temperature of the insulating material within a high temperature range (1000 to 2000/sup 0/K). When required, the sensor can be encased within a ceramic protective coating.

Not Available

1981-01-29T23:59:59.000Z

84

Image reconstruction for high-sensitivity imaging by using combined long/short exposure type single-chip image sensor  

Science Conference Proceedings (OSTI)

We propose a image reconstruction method and a sensor for high-sensitivity imaging using long-term exposed green pixels over several frames. As a result of extending the exposure time of green pixels, motion blur increases. We use motion information ...

Sanzo Ugawa; Takeo Azuma; Taro Imagawa; Yusuke Okada

2010-11-01T23:59:59.000Z

85

Energy efficient sensor node implementations  

Science Conference Proceedings (OSTI)

In this paper, we discuss a low power embedded sensor node architecture we are developing for distributed sensor network systems deployed in a natural environment. In particular, we examine the sensor node for energy efficient processing-at-the-sensor. ... Keywords: acoustic, distributed sensor network (dsn), dsp, fpga, seismic, vehicle classification, video

Jan R. Frigo; Eric Y. Raby; Sean M. Brennan; Christophe Wolinski; Charles Wagner; Francois Charot; Edward Rosten; Vinod K. Kulathumani

2010-02-01T23:59:59.000Z

86

MTDC Safety Sensor Technology  

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

MTDC Safety Sensor Technology MTDC Safety Sensor Technology Background Beyond the standard duty cycle data collection system used in the Department of Energy's Medium Truck Duty Cycle program, additional sensors were installed on three test vehicles to collect several safety-related signals of interest to the Federal Motor Carrier Safety Administration. The real-time brake stroke, tire pressure, and weight information obtained from these sensors is expected to make possible a number of safety-related analyses such as determining the frequency and severity of braking events and tracking tire pressure changes over time. Because these signals are posted to the vehicle's databus, they also have the potential to be

87

Sensors, Electronics & Instrumentation  

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

Sensors, Electronics & Instrumentation Sensors, Electronics & Instrumentation Sensors, Electronics & Instrumentation Express Licensing Acoustic Concentration Of Particles In Fluid Flow Express Licensing Apparatus And Method For Hydrogen And Oxygen Mass Spectrometry Of The Terrestrial Magnetosphere Express Licensing Apparatus And Method For Temperature Correction And Expanded Count Rate Of Inorganic Scintillation Detectors Express Licensing Composition and method for removing photoresist materials from electronic components Express Licensing Corrosion Test Cell For Bipolar Plates Express Licensing Cylindrical Acoustic Levitator/Concentrator Negotiable Licensing Electrochemical Apparatus with Disposable and Modifiable Parts Express Licensing Foil electron multiplier Express Licensing Hydrogen Sensor

88

PNNL: Available Technologies: Sensors  

Non-Contact Sensor for Measuring the Density and Speed of Sound of a Liquid Contained in a Pipeline or Vessel; Real-Time Fluid Viscometer in Contact ...

89

Fiber optic geophysical sensors  

DOE Patents (OSTI)

This invention is comprised of a fiber optic geophysical sensor in which laser light is passed through a sensor interferometer in contact with a geophysical event, and a reference interferometer not in contact with the geophysical event but in the same general environment as the sensor interferometer. In one embodiment, a single tunable laser provides the laser light. In another embodiment, separate tunable lasers are used for the sensor and reference interferometers. The invention can find such uses as monitoring for earthquakes, and the weighing of objects. 2 figs.

Homuth, E.F.

1990-01-01T23:59:59.000Z

90

Fiber optic geophysical sensors  

DOE Patents (OSTI)

This invention is comprised of a fiber optic geophysical sensor in which laser light is passed through a sensor interferometer in contact with a geophysical event, and a reference interferometer not in contact with the geophysical event but in the same general environment as the sensor interferometer. In one embodiment, a single tunable laser provides the laser light. In another embodiment, separate tunable lasers are used for the sensor and reference interferometers. The invention can find such uses as monitoring for earthquakes, and the weighing of objects. 2 figs.

Homuth, E.F.

1990-12-31T23:59:59.000Z

91

A Decentralized Dynamic Sensor Activation Protocol for Chemical Sensor Networks  

Science Conference Proceedings (OSTI)

Due to the significant amount of energy consumed by chemical sensors for sensing, reducing sensing activity is critical for improving the lifespan of chemical sensor networks. In this paper, we consider a simple decentralized dynamic sensor activation ...

Shanika Karunasekera; Champake Mendis; Alex Skvortsov; Ajith Gunatilaka

2010-07-01T23:59:59.000Z

92

Hydrocarbon/Total Combustibles Sensor  

the invention is an electrochemical hydrocarbon sensor that is more reliable and reproducible than any other hydrocarbon sensor on the market today. The patented method for producing the sensor ensures reproducibility and reduces the need for ...

93

Froth height level sensor  

DOE Patents (OSTI)

A single sensor, comprised of a tube located near the foaming liquid, and another well away from the first, are used to determine the existence of foam in the vicinity of the probe. Two sensors a known distance apart can be used to locate the froth assuming a uniform froth density. The present invention utilizes the pressure differential existing between process chamber ambient pressure and the froth pressure to determine the existence of a froth and its location. Where froth density is not constant, multiple sensors at differing heights with respect to each other, or a single movable sensor, are used. Information derived using the multiple or movable sensor yields unambiguous froth density and height data.

Glaser, J.W.; Holmes, L.; Upadhye, R.S.; Wilder, J.G.

1994-12-31T23:59:59.000Z

94

Energy harvesting Wheel Speed Sensor.  

E-Print Network (OSTI)

??This thesis presents a prototype energy harvesting autonomous sensor, called the Autonomous Wheel Speed Sensor (AWSS), that is targeted for operation in the Electronic Braking… (more)

Parthasarathy, Dhasarathy

2012-01-01T23:59:59.000Z

95

R&D 100: Smart Sensors Mean Energy Savings | Department of Energy  

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

R&D 100: Smart Sensors Mean Energy Savings R&D 100: Smart Sensors Mean Energy Savings R&D 100: Smart Sensors Mean Energy Savings July 23, 2013 - 3:04pm Addthis Researchers at the Energy Department's National Renewable Energy Laboratory recently developed a new smart occupancy sensor that adds optics to what had only been a motion detection before. The new sensor combines an inexpensive camera with a high-speed microprocessor and algorithms to detect movement and human presence in a room with an accuracy of more than 90 percent -- an advancement that could lead to enormous energy savings in commercial buildings. | Photo courtesy of Dennis Schroeder, NREL. Researchers at the Energy Department's National Renewable Energy Laboratory recently developed a new smart occupancy sensor that adds optics to what

96

R&D 100: Smart Sensors Mean Energy Savings | Department of Energy  

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

Smart Sensors Mean Energy Savings Smart Sensors Mean Energy Savings R&D 100: Smart Sensors Mean Energy Savings July 23, 2013 - 3:04pm Addthis Researchers at the Energy Department's National Renewable Energy Laboratory recently developed a new smart occupancy sensor that adds optics to what had only been a motion detection before. The new sensor combines an inexpensive camera with a high-speed microprocessor and algorithms to detect movement and human presence in a room with an accuracy of more than 90 percent -- an advancement that could lead to enormous energy savings in commercial buildings. | Photo courtesy of Dennis Schroeder, NREL. Researchers at the Energy Department's National Renewable Energy Laboratory recently developed a new smart occupancy sensor that adds optics to what

97

Sensor Control Unit Light Submitted by:  

E-Print Network (OSTI)

With the growing need to conserve energy, more people are becoming conscious of energy consumption and are looking for ways to reduce costly waste associated with electricity. Though most consumers do not think about lighting until the light bulb fails or the power goes out, expenses incurred due to lighting have been found to be a large part of overall energy consumption and lighting has now become the focus of efforts aimed at reducing the high cost of electricity. The purpose of our project is to design an Automatic Light Control Device (ALCD) to help curb the high cost of internal lighting while creating a convenient effortlessly lighted environment for the consumer. Today, energy saving devices, such as occupancy or motion sensors, is used by a multiple of people for the conservation of power. Motion detectors cause lights to turn on after entering the room and off after no movement is detected for a certain amount of time. This unit is efficient; however, energy is loss due to the presence and absence of movement in a particular room by the sensor continuously activating on or off. Unneeded cycling uses more power and defeats the intended purpose of saving energy. The ALCD will save energy by eliminating false conditions, thereby minimizing light

Professor Joseph Picone; Ece Senior Design I; John Thompson; Marshalia Green; Brad Lowe; Lutrisha Johnson; Automatic Light Control Device

2001-01-01T23:59:59.000Z

98

Remote electrochemical sensor  

DOE Patents (OSTI)

An electrochemical sensor is described for remote detection, particularly useful for metal contaminants and organic or other compounds. The sensor circumvents technical difficulties that previously prevented in-situ remote operations. The microelectrode, connected to a long communications cable, allows convenient measurements of the element or compound at timed and frequent intervals and instrument/sample distances of ten feet to more than 100 feet. The sensor is useful for both downhole groundwater monitoring and in-situ water (e.g., shipboard seawater) analysis. 21 figs.

Wang, J.; Olsen, K.; Larson, D.

1997-10-14T23:59:59.000Z

99

Integrated optical tamper sensor  

DOE Patents (OSTI)

This invention consists of an monolithic optical tamper sensor, comprising an optical emitter and detector, connected by an optical waveguide and placed into the critical entry plane of an enclosed sensitive region, the tamper sensor having a myriad of scraps of a material optically absorbent at the wavelength of interest, such that when the absorbent material is in place on the waveguide, an unique optical signature can be recorded, but when entry is attempted into the enclosed sensitive region, the scraps of absorbent material will be displaced and the optical/electrical signature of the tamper sensor will change and that change can be recorded.

Carson, R.F.; Casalnuovo, S.A.

1991-12-31T23:59:59.000Z

100

RF current sensor  

DOE Patents (OSTI)

An RF sensor having a novel current sensing probe and a voltage sensing probe to measure voltage and current. The current sensor is disposed in a transmission line to link all of the flux generated by the flowing current in order to obtain an accurate measurement. The voltage sensor is a flat plate which operates as a capacitive plate to sense voltage on a center conductor of the transmission line, in which the measured voltage is obtained across a resistance leg of a R-C differentiator circuit formed by the characteristic impedance of a connecting transmission line and a capacitance of the plate, which is positioned proximal to the center conductor.

Moore, James A. (Powell, TN); Sparks, Dennis O. (Maryville, TN)

1998-11-10T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Electrochemical micro sensor  

DOE Patents (OSTI)

A micro-amperometric electrochemical sensor for detecting the presence of a pre-determined species in a fluid material is disclosed. The sensor includes a smooth substrate having a thin coating of solid electrolytic material deposited thereon. The working and counter electrodes are deposited on the surface of the solid electrolytic material and adhere thereto. Electrical leads connect the working and counter electrodes to a potential source and an apparatus for measuring the change in an electrical signal caused by the electrochemical oxidation or reduction of the species. Alternatively, the sensor may be fabricated in a sandwich structure and also may be cylindrical, spherical or other shapes.

Setter, Joseph R. (Naperville, IL); Maclay, G. Jordan (Maywood, IL)

1989-09-12T23:59:59.000Z

102

The Universe Adventure - Galaxial Motion  

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

Bulk Motions of Galaxies Bulk Motions of Galaxies Galaxy Diagram The Structure of a typical Spiral Galaxy. Galaxies are most often found in clusters and are thus subject to gravitational forces from their neighbors. The relative motion that results from these interactions causes deviations from the cosmological principle called bulk flow. Measuring the peculiar velocities enables cosmologists to calculate the masses of interacting galaxies. Using this technique scientists can estimate the total density of matter in the Universe. During the recombination epoch, the Universe had cooled sufficiently for nucleosynthesis to occur. However, this process produces only a few elements, and looking at the abundance of these elements today is indicative of the rate of nucleosynthesis and the amount of baryonic mass

103

Microsoft Word - Motion to Intervene  

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

ELECTRICITY DELIVERY AND ENERGY RELIABILITY ELECTRICITY DELIVERY AND ENERGY RELIABILITY Northern Pass Transmission LLC OE Docket No. PP-371 Application for Presidential Permit MOTION TO INTERVENE Pursuant to Rule 214 of the Rules of Practice and Procedure of the Federal Energy Regulatory Commission (18CFR 385.214) we (Stephen Buzzell and Lelah Sullivan) do hereby file this motion to intervene. In support of this motion, we state as follows: 1. Notices, correspondence and other communications All notices, correspondence, communications and other information concerning this proceeding should be directed to: Stephen Buzzell and Lelah Sullivan, 36 Buzzell Lane, Eliot, ME 03903. Telephone: 207-641-7036, email: 1s2buzzell3@comcast.net. 2. Movant's interest We own a vacation home [43 Gingerbread Rd. ,Easton, NH] that is directly on the right away of the

104

LWZ-0021 Motion to Dismiss  

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

Sandia National Laboratories Sandia National Laboratories DECISION AND ORDER OF THE DEPARTMENT OF ENERGY Motions to Dismiss Names of Petitioners: Sandia National Laboratories L & M Technologies, Inc. Dates of Filing: August 11, 1993 August 17, 1993 Case Numbers: LWZ-0021 LWZ-0022 This determination will consider two Motions to Dismiss filed by Sandia National Laboratories (Sandia) and L & M Technologies, Inc. (L&M) on August 11 and 17, 1993, respectively. In their Motions, Sandia and L&M seek the dismissal of the underlying complaint and hearing request filed by Mr. Ronald A. Sorri (Sorri) under the Department of Energy's Contractor Employee Protection Program. Sorri's present request for a hearing under § 708.9 was filed on June 9, 1993, and it has been assigned Office

105

Piezoelectric step-motion actuator  

DOE Patents (OSTI)

A step-motion actuator using piezoelectric material to launch a flight mass which, in turn, actuates a drive pawl to progressively engage and drive a toothed wheel or rod to accomplish stepped motion. Thus, the piezoelectric material converts electrical energy into kinetic energy of the mass, and the drive pawl and toothed wheel or rod convert the kinetic energy of the mass into the desired rotary or linear stepped motion. A compression frame may be secured about the piezoelectric element and adapted to pre-compress the piezoelectric material so as to reduce tensile loads thereon. A return spring may be used to return the mass to its resting position against the compression frame or piezoelectric material following launch. Alternative embodiment are possible, including an alternative first embodiment wherein two masses are launched in substantially different directions, and an alternative second embodiment wherein the mass is eliminated in favor of the piezoelectric material launching itself.

Mentesana; Charles P. (Leawood, KS)

2006-10-10T23:59:59.000Z

106

Complex pendulum biomass sensor  

DOE Patents (OSTI)

A complex pendulum system biomass sensor having a plurality of pendulums. The plurality of pendulums allow the system to detect a biomass height and density. Each pendulum has an angular deflection sensor and a deflector at a unique height. The pendulums are passed through the biomass and readings from the angular deflection sensors are fed into a control system. The control system determines whether adjustment of machine settings is appropriate and either displays an output to the operator, or adjusts automatically adjusts the machine settings, such as the speed, at which the pendulums are passed through the biomass. In an alternate embodiment, an entanglement sensor is also passed through the biomass to determine the amount of biomass entanglement. This measure of entanglement is also fed into the control system.

Hoskinson, Reed L. (Rigby, ID); Kenney, Kevin L. (Idaho Falls, ID); Perrenoud, Ben C. (Rigby, ID)

2007-12-25T23:59:59.000Z

107

Integrated optical sensor  

SciTech Connect

An integrated optical sensor for arc welding having multifunction feedback control. The sensor, comprising generally a CCD camera and diode laser, is positioned behind the arc torch for measuring weld pool position and width, standoff distance, and post-weld centerline cooling rate. Computer process information from this sensor is passed to a controlling computer for use in feedback control loops to aid in the control of the welding process. Weld pool position and width are used in a feedback loop, by the weld controller, to track the weld pool relative to the weld joint. Sensor standoff distance is used in a feedback loop to control the contact tip to base metal distance during the welding process. Cooling rate information is used to determine the final metallurgical state of the weld bead and heat affected zone, thereby controlling post-weld mechanical properties.

Watkins, Arthur D. (Idaho Falls, ID); Smartt, Herschel B. (Idaho Falls, ID); Taylor, Paul L. (Idaho Falls, ID)

1994-01-01T23:59:59.000Z

108

Integrated optical sensor  

DOE Patents (OSTI)

An integrated optical sensor for arc welding having multifunction feedback control is described. The sensor, comprising generally a CCD camera and diode laser, is positioned behind the arc torch for measuring weld pool position and width, standoff distance, and post-weld centerline cooling rate. Computer process information from this sensor is passed to a controlling computer for use in feedback control loops to aid in the control of the welding process. Weld pool position and width are used in a feedback loop, by the weld controller, to track the weld pool relative to the weld joint. Sensor standoff distance is used in a feedback loop to control the contact tip to base metal distance during the welding process. Cooling rate information is used to determine the final metallurgical state of the weld bead and heat affected zone, thereby controlling post-weld mechanical properties. 6 figures.

Watkins, A.D.; Smartt, H.B.; Taylor, P.L.

1994-01-04T23:59:59.000Z

109

Capacitance pressure sensor  

DOE Patents (OSTI)

A microelectromechanical (MEM) capacitance pressure sensor integrated with electronic circuitry on a common substrate and a method for forming such a device are disclosed. The MEM capacitance pressure sensor includes a capacitance pressure sensor formed at least partially in a cavity etched below the surface of a silicon substrate and adjacent circuitry (CMOS, BiCMOS, or bipolar circuitry) formed on the substrate. By forming the capacitance pressure sensor in the cavity, the substrate can be planarized (e.g. by chemical-mechanical polishing) so that a standard set of integrated circuit processing steps can be used to form the electronic circuitry (e.g. using an aluminum or aluminum-alloy interconnect metallization).

Eaton, William P. (Tijeras, NM); Staple, Bevan D. (Albuquerque, NM); Smith, James H. (Albuquerque, NM)

2000-01-01T23:59:59.000Z

110

An Improved Humidity Sensor  

Science Conference Proceedings (OSTI)

A common feature of all capacitance humidity sensors is their undesirable hysteresis effect due to the unequal adsorption and desorption of water vapor on the surfaces of their dielectric porous materials. To eliminate this error, an improved ...

Shixuan Pang; Hartmut Graßl; Horst Jäger

1996-10-01T23:59:59.000Z

111

NOx Sensor Development  

SciTech Connect

NO{sub x} compounds, specifically NO and NO{sub 2}, are pollutants and potent greenhouse gases. Compact and inexpensive NO{sub x} sensors are necessary in the next generation of diesel (CIDI) automobiles to meet government emission requirements and enable the more rapid introduction of more efficient, higher fuel economy CIDI vehicles. Because the need for a NO{sub x} sensor is recent and the performance requirements are extremely challenging, most are still in the development phase. Currently, there is only one type of NO{sub x} sensor that is sold commercially, and it seems unlikely to meet more stringent future emission requirements. Automotive exhaust sensor development has focused on solid-state electrochemical technology, which has proven to be robust for in-situ operation in harsh, high-temperature environments (e.g., the oxygen stoichiometric sensor). Solid-state sensors typically rely on yttria-stabilized zirconia (YSZ) as the oxygen-ion conducting electrolyte and then target different types of metal or metal-oxide electrodes to optimize the response. Electrochemical sensors can be operated in different modes, including amperometric (a current is measured) and potentiometric (a voltage is measured), both of which employ direct current (dc) measurements. Amperometric operation is costly due to the electronics necessary to measure the small sensor signal (nanoampere current at ppm NO{sub x} levels), and cannot be easily improved to meet the future technical performance requirements. Potentiometric operation has not demonstrated enough promise in meeting long-term stability requirements, where the voltage signal drift is thought to be due to aging effects associated with electrically driven changes, both morphological and compositional, in the sensor. Our approach involves impedancemetric operation, which uses alternating current (ac) measurements at a specified frequency. The approach is described in detail in previous reports and several publications. Briefly, impedancemetric operation has shown the potential to overcome the drawbacks of other approaches, including higher sensitivity towards NO{sub x}, better long-term stability, potential for subtracting out background interferences, total NO{sub x} measurement, and lower cost materials and operation. Past LLNL research and development efforts have focused on characterizing different sensor materials and understanding complex sensing mechanisms. Continued effort has led to improved prototypes with better performance, including increased sensitivity (to less than 5 ppm) and long-term stability, with more appropriate designs for mass fabrication, including incorporation of an alumina substrate with an imbedded heater. Efforts in the last year to further improve sensor robustness have led to successful engine dynamometer testing with prototypes mounted directly in the engine manifold. Previous attempts had required exhaust gases to be routed into a separate furnace for testing due to mechanical failure of the sensor from engine vibrations. A more extensive cross-sensitivity study was also undertaken this last year to examine major noise factors including fluctuations in water, oxygen, and temperature. The quantitative data were then used to develop a strategy using numerical algorithms to improve sensor accuracy. The ultimate goal is the transfer of this technology to a supplier for commercialization. Due to the recent economic downturn, suppliers are demanding more comprehensive data and increased performance analysis before committing their resources to take the technology to market. Therefore, our NO{sub x} sensor work requires a level of technology development more thorough and extensive than ever before. The objectives are: (1) Develop an inexpensive, rapid-response, high-sensitivity and selective electrochemical sensor for oxides of nitrogen (NO{sub x}) for compression-ignition, direct-injection (CIDI) exhaust gas monitoring; (2) Explore and characterize novel, effective sensing methodologies based on impedance measurements and designs and manufacturing metho

Woo, L Y; Glass, R S

2010-11-01T23:59:59.000Z

112

Proceedings of the DOE/Industry Sensor Working Group meeting, Austin, Texas  

Science Conference Proceedings (OSTI)

This paper report contains topics presented at a sensor workshop group meeting. The topics describe measuring instruments of use in the pulp and paper industry. Topics include: measurement of solids fraction; process instrumentation research for the pulp paper industry; real-time non-contact optical surface motion monitor; on-machine sensors to measure paper mechanical properties; hierarchical intelligent control of industrial processes -- an in-parallel lime kiln application; proposal for research on lignin concentration measurement in pulping liquors; and advanced polymeric sensor materials for industrial drying.

Not Available

1988-11-01T23:59:59.000Z

113

Biological Microsensors - Microsensors and Sensor Microsystems...  

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

science to deliver prototype solutions in applications ranging from biodetection to photovoltaics. Sensor development includes discrete sensors and sensor arrays based on...

114

Sensor Characteristics Reference Guide  

Science Conference Proceedings (OSTI)

The Buildings Technologies Office (BTO), within the U.S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy (EERE), is initiating a new program in Sensor and Controls. The vision of this program is: • Buildings operating automatically and continuously at peak energy efficiency over their lifetimes and interoperating effectively with the electric power grid. • Buildings that are self-configuring, self-commissioning, self-learning, self-diagnosing, self-healing, and self-transacting to enable continuous peak performance. • Lower overall building operating costs and higher asset valuation. The overarching goal is to capture 30% energy savings by enhanced management of energy consuming assets and systems through development of cost-effective sensors and controls. One step in achieving this vision is the publication of this Sensor Characteristics Reference Guide. The purpose of the guide is to inform building owners and operators of the current status, capabilities, and limitations of sensor technologies. It is hoped that this guide will aid in the design and procurement process and result in successful implementation of building sensor and control systems. DOE will also use this guide to identify research priorities, develop future specifications for potential market adoption, and provide market clarity through unbiased information

Cree, Johnathan V.; Dansu, A.; Fuhr, P.; Lanzisera, Steven M.; McIntyre, T.; Muehleisen, Ralph T.; Starke, M.; Banerjee, Pranab; Kuruganti, T.; Castello, C.

2013-04-01T23:59:59.000Z

115

Passive Sensors | Open Energy Information  

Open Energy Info (EERE)

Passive Sensors Passive Sensors Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Passive Sensors Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Remote Sensing Techniques Exploration Sub Group: Passive Sensors Parent Exploration Technique: Remote Sensing Techniques Information Provided by Technique Lithology: Mineral maps can be used to show the presence of hydrothermal minerals and mineral assemblages Stratigraphic/Structural: Map structures/faults and regional strain rates Hydrological: Map surface water features Thermal: Map surface temperatures Dictionary.png Passive Sensors: Sensors that measure energy which is naturally available in the environment. Other definitions:Wikipedia Reegle

116

Diagnosing Forecast Errors in Tropical Cyclone Motion  

Science Conference Proceedings (OSTI)

This paper reports on the development of a diagnostic approach that can be used to examine the sources of numerical model forecast error that contribute to degraded tropical cyclone (TC) motion forecasts. Tropical cyclone motion forecasts depend ...

Thomas J. Galarneau Jr.; Christopher A. Davis

2013-02-01T23:59:59.000Z

117

Wireless Sensor Network Fundamentals  

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

Wireless Sensor Network Fundamentals Wireless Sensor Network Fundamentals Speaker(s): Steven Lanzisera Date: February 8, 2010 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Kevin Kircher Wireless sensor networks have been promising to provide easy data collection and control capability to applications ranging from scientific data collection, disaster recover, national security, and more. The user experience, however, has been filled with confusing terminology, complicated systems, and a lack of interoperability between vendors. Users with a background in the technology and fundamentals are better able to understand system capabilities, make decisions, and end up with a network that meets their needs. Although a sufficient coverage of this topic is at least a semester course, the goal of this talk is to give a brief

118

Capacitive proximity sensor  

DOE Patents (OSTI)

A proximity sensor based on a closed field circuit is disclosed. The circuit comprises a ring oscillator using a symmetrical array of plates that creates an oscillating displacement current. The displacement current varies as a function of the proximity of objects to the plate array. Preferably the plates are in the form of a group of three pair of symmetric plates having a common center, arranged in a hexagonal pattern with opposing plates linked as a pair. The sensor produces logic level pulses suitable for interfacing with a computer or process controller. The proximity sensor can be incorporated into a load cell, a differential pressure gauge, or a device for measuring the consistency of a characteristic of a material where a variation in the consistency causes the dielectric constant of the material to change. 14 figs.

Kronberg, J.W.

1994-05-31T23:59:59.000Z

119

LWD-0008 Motion for Discovery  

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

Ronald A. Sorri Ronald A. Sorri DECISION AND ORDER OF THE DEPARTMENT OF ENERGY Motions for Discovery Supplemental Order Name of Petitioner: Ronald A. Sorri L&M Technologies, Inc. Ronald A. Sorri Dates of Filing: September 24, 1993 September 27, 1993 October 12, 1993 Case Numbers: LWD-0008 LWD-0009 LWX-0011 This determination will consider two requests for discovery filed with the Office of Hearings and Appeals (OHA) on September 24 and 27, 1993, by Ronald A. Sorri (Sorri) and L&M Technologies, Inc. (L&M), respectively. These motions concern the hearing requested by Sorri under the Department of Energy's Contractor Employee Protection Program, 10 C.F.R. Part 708, on June 9, 1993 (OHA Case No. LWA-0001). The DOE Contractor Employee Protection Program and the Sorri proceeding are described in a

120

Thin film hydrogen sensor  

DOE Green Energy (OSTI)

A hydrogen sensor element comprises an essentially inert, electrically-insulating substrate having a thin-film metallization deposited thereon which forms at least two resistors on the substrate. The metallization comprises a layer of Pd or a Pd alloy for sensing hydrogen and an underlying intermediate metal layer for providing enhanced adhesion of the metallization to the substrate. An essentially inert, electrically insulating, hydrogen impermeable passivation layer covers at least one of the resistors, and at least one of the resistors is left uncovered. The difference in electrical resistances of the covered resistor and the uncovered resistor is related to hydrogen concentration in a gas to which the sensor element is exposed.

Lauf, Robert J. (Oak Ridge, TN); Hoffheins, Barbara S. (Knoxville, TN); Fleming, Pamela H. (Oak Ridge, TN)

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Implantable medical sensor system  

DOE Patents (OSTI)

An implantable chemical sensor system for medical applications is described which permits selective recognition of an analyte using an expandable biocompatible sensor, such as a polymer, that undergoes a dimensional change in the presence of the analyte. The expandable polymer is incorporated into an electronic circuit component that changes its properties (e.g., frequency) when the polymer changes dimension. As the circuit changes its characteristics, an external interrogator transmits a signal transdermally to the transducer, and the concentration of the analyte is determined from the measured changes in the circuit. This invention may be used for minimally invasive monitoring of blood glucose levels in diabetic patients.

Darrow, Christopher B. (Pleasanton, CA); Satcher, Jr., Joe H. (Modesto, CA); Lane, Stephen M. (Oakland, CA); Lee, Abraham P. (Walnut Creek, CA); Wang, Amy W. (Berkeley, CA)

2001-01-01T23:59:59.000Z

122

Chemical sensor system  

DOE Patents (OSTI)

An implantable chemical sensor system for medical applications is described which permits selective recognition of an analyte using an expandable biocompatible sensor, such as a polymer, that undergoes a dimensional change in the presence of the analyte. The expandable polymer is incorporated into an electronic circuit component that changes its properties (e.g., frequency) when the polymer changes dimension. As the circuit changes its characteristics, an external interrogator transmits a signal transdermally to the transducer, and the concentration of the analyte is determined from the measured changes in the circuit. This invention may be used for minimally invasive monitoring of blood glucose levels in diabetic patients.

Darrow, Christopher B. (Pleasanton, CA); Satcher, Jr., Joe H. (Modesto, CA); Lane, Stephen M. (Oakland, CA); Lee, Abraham P. (Walnut Creek, CA); Wang, Amy W. (Berkeley, CA)

2002-01-01T23:59:59.000Z

123

Fluorescent temperature sensor  

Science Conference Proceedings (OSTI)

The present invention is a fluorescent temperature sensor or optical thermometer. The sensor includes a solution of 1,3-bis(1-pyrenyl)propane within a 1-butyl-1-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ionic liquid solvent. The 1,3-bis(1-pyrenyl)propane remains unassociated when in the ground state while in solution. When subjected to UV light, an excited state is produced that exists in equilibrium with an excimer. The position of the equilibrium between the two excited states is temperature dependent.

Baker, Gary A [Los Alamos, NM; Baker, Sheila N [Los Alamos, NM; McCleskey, T Mark [Los Alamos, NM

2009-03-03T23:59:59.000Z

124

Ground motion input in seismic evaluation studies  

Science Conference Proceedings (OSTI)

This report documents research pertaining to conservatism and variability in seismic risk estimates. Specifically, it examines whether or not artificial motions produce unrealistic evaluation demands, i.e., demands significantly inconsistent with those expected from real earthquake motions. To study these issues, two types of artificial motions are considered: (a) motions with smooth response spectra, and (b) motions with realistic variations in spectral amplitude across vibration frequency. For both types of artificial motion, time histories are generated to match target spectral shapes. For comparison, empirical motions representative of those that might result from strong earthquakes in the Eastern U.S. are also considered. The study findings suggest that artificial motions resulting from typical simulation approaches (aimed at matching a given target spectrum) are generally adequate and appropriate in representing the peak-response demands that may be induced in linear structures and equipment responding to real earthquake motions. Also, given similar input Fourier energies at high-frequencies, levels of input Fourier energy at low frequencies observed for artificial motions are substantially similar to those levels noted in real earthquake motions. In addition, the study reveals specific problems resulting from the application of Western U.S. type motions for seismic evaluation of Eastern U.S. nuclear power plants.

Sewell, R.T.; Wu, S.C.

1996-07-01T23:59:59.000Z

125

Widget:Motion Chart Visualizations | Open Energy Information  

Open Energy Info (EERE)

Motion Chart Visualizations Jump to: navigation, search Widget to display Google motion charts on OpenEI. Usage: Widget:Motion Chart Visualizations |configgeneralunitedstates...

126

Capturing Village-level Heritages with a Hand-held Camera-Laser Fusion Sensor  

Science Conference Proceedings (OSTI)

Preserving a heritage as a digital archive is as important as preserving its physical structure. The digital preservation is essential for massive heritages which are often defenceless against various types of destruction and require frequent restorations. ... Keywords: Camera-laser calibration, Ego-motion estimation, Large-scale 3D reconstruction, Sensor fusion, e-Heritage

Yunsu Bok; Yekeun Jeong; Dong-Geol Choi; In So Kweon

2011-08-01T23:59:59.000Z

127

Tactile sensing using elastomeric sensors  

E-Print Network (OSTI)

GelSight, namely, elastomeric sensor, is a novel tactile sensor to get the 3D information of contacting surfaces. Using GelSight, some tactile properties, such as softness and roughness, could be gained through image ...

Jia, Xiaodan (Xiaodan Stella)

2012-01-01T23:59:59.000Z

128

Advanced Sensors for Multifunctional Applications  

Science Conference Proceedings (OSTI)

For more precision, most of the examples are related to multifunctional gas ... Still , those systems do not have the information capacity of natural biologic ... shape- memory devices, temperature sensors, and liquid-viscosity sensors as well.

129

Sensors for Underground Distribution Systems  

Science Conference Proceedings (OSTI)

A variety of different sensors are needed for underground distribution applications. These include sensors for temperature monitoring to track possible overload issues and other issues that can cause heating in underground systems (for example, arcing), sensors for fault detection and characterization, and sensors for voltage and current monitoring to support a wide range of applications (for example, SCADA, volt/var control, and load flow management). In 2008, EPRI evaluated the present state of medium-...

2010-03-31T23:59:59.000Z

130

Future Directions for Magnetic Sensors  

Science Conference Proceedings (OSTI)

... sensor applications. They have the advantages of high sensitivity, small size, low cost, and low power consumption. However ...

2012-10-05T23:59:59.000Z

131

Carbon Nanostructure-Based Sensors  

E-Print Network (OSTI)

as Carriers. Angewandte Chemie International Edition 2009,Vapor Sensors. Angewandte Chemie International Edition 2008,Absorption. Angewandte Chemie International Edition 2009,

Sarkar, Tapan

2012-01-01T23:59:59.000Z

132

Structure from motion using omni-directional vision and certainty grids  

E-Print Network (OSTI)

This thesis describes a method to create local maps from an omni-directional vision system (ODVS) mounted on a mobile robot. Range finding is performed by a structure-from-motion method, which recovers the three-dimensional position of objects in the environment from omni-directional images. This leads to map-making, which is accomplished using certainty grids to fuse information from multiple readings into a two-dimensional world model. The system is demonstrated both on noise-free data from a custom-built simulator and on real data from an omni-directional vision system on-board a mobile robot. Finally, to account for the particular error characteristics of a real omni-directional vision sensor, a new sensor model for the certainty grid framework is also created and compared to the traditional sonar sensor model.

Ortiz, Steven Rey

2004-08-01T23:59:59.000Z

133

Carbon Monoxide Sensor - Energy Innovation Portal  

Electricity Transmission; Energy Analysis; ... the sensor ensures reproducibility and reduces the need for calibration of every sensor coming off the ...

134

Thick film hydrogen sensor  

DOE Green Energy (OSTI)

A thick film hydrogen sensor element includes an essentially inert, electrically-insulating substrate having deposited thereon a thick film metallization forming at least two resistors. The metallization is a sintered composition of Pd and a sinterable binder such as glass frit. An essentially inert, electrically insulating, hydrogen impermeable passivation layer covers at least one of the resistors.

Hoffheins, Barbara S. (Knoxville, TN); Lauf, Robert J. (Oak Ridge, TN)

1995-01-01T23:59:59.000Z

135

Composite sensor membrane  

DOE Patents (OSTI)

A sensor may include a membrane to deflect in response to a change in surface stress, where a layer on the membrane is to couple one or more probe molecules with the membrane. The membrane may deflect when a target molecule reacts with one or more probe molecules.

Majumdar, Arun (Orinda, CA); Satyanarayana, Srinath (Berkeley, CA); Yue, Min (Albany, CA)

2008-03-18T23:59:59.000Z

136

Lean blowoff detection sensor  

DOE Patents (OSTI)

Apparatus and method for detecting incipient lean blowoff conditions in a lean premixed combustion nozzle of a gas turbine. A sensor near the flame detects the concentration of hydrocarbon ions and/or electrons produced by combustion and the concentration monitored as a function of time are used to indicate incipient lean blowoff conditions.

Thornton, Jimmy (Morgantown, WV); Straub, Douglas L. (Morgantown, WV); Chorpening, Benjamin T. (Morgantown, WV); Huckaby, David (Morgantown, WV)

2007-04-03T23:59:59.000Z

137

Carbon dioxide sensor  

SciTech Connect

The present invention generally relates to carbon dioxide (CO.sub.2) sensors. In one embodiment, the present invention relates to a carbon dioxide (CO.sub.2) sensor that incorporates lithium phosphate (Li.sub.3PO.sub.4) as an electrolyte and sensing electrode comprising a combination of lithium carbonate (Li.sub.2CO.sub.3) and barium carbonate (BaCO.sub.3). In another embodiment, the present invention relates to a carbon dioxide (CO.sub.2) sensor has a reduced sensitivity to humidity due to a sensing electrode with a layered structure of lithium carbonate and barium carbonate. In still another embodiment, the present invention relates to a method of producing carbon dioxide (CO.sub.2) sensors having lithium phosphate (Li.sub.3PO.sub.4) as an electrolyte and sensing electrode comprising a combination of lithium carbonate (Li.sub.2CO.sub.3) and barium carbonate (BaCO.sub.3).

Dutta, Prabir K. (Worthington, OH); Lee, Inhee (Columbus, OH); Akbar, Sheikh A. (Hilliard, OH)

2011-11-15T23:59:59.000Z

138

Miniaturized wireless sensor network  

E-Print Network (OSTI)

This paper addresses an overview of the wireless sensor networks. It is shown that MEMS/NEMS technologies and SIP concept are well suited for advanced architectures. It is also shown analog architectures have to be compatible with digital signal techniques to develop smart network of microsystem.

Lecointre, Aubin; Dubuc, David; Katia, Grenier; Patrick, Pons; Aubert, Hervé; Muller, A; Berthou, Pascal; Gayraud, Thierry; Plana, Robert

2010-01-01T23:59:59.000Z

139

Shape memory alloy thaw sensors  

DOE Patents (OSTI)

A sensor permanently indicates that it has been exposed to temperatures exceeding a critical temperature for a predetermined time period. An element of the sensor made from shape memory alloy changes shape when exposed, even temporarily, to temperatures above the Austenitic temperature of the shape memory alloy. The shape change of the SMA element causes the sensor to change between two readily distinguishable states.

Shahinpoor, Mohsen (Albuquerque, NM); Martinez, David R. (Albuquerque, NM)

1998-01-01T23:59:59.000Z

140

Sensor system for web inspection  

DOE Patents (OSTI)

A system for electrically measuring variations over a flexible web has a capacitive sensor including spaced electrically conductive, transmit and receive electrodes mounted on a flexible substrate. The sensor is held against a flexible web with sufficient force to deflect the path of the web, which moves relative to the sensor.

Sleefe, Gerard E. (1 Snowcap Ct., Cedar Crest, NM 87008); Rudnick, Thomas J. (626 E. Jackson Rd., St. Louis, MO 63119); Novak, James L. (11048 Malaguena La. NE., Albuquerque, NM 87111)

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Danotek Motion Technologies | Open Energy Information  

Open Energy Info (EERE)

Danotek Motion Technologies Danotek Motion Technologies Jump to: navigation, search Name Danotek Motion Technologies Place Ann Arbor, Michigan Zip 48103 Sector Wind energy Product Founded in 2001, Danotek develops electrical conversion systems, including generators, brushless motors, and electronics controls, for the wind power, fuel cell, and power storage markets. References Danotek Motion Technologies[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Danotek Motion Technologies is a company located in Ann Arbor, Michigan . References ↑ "Danotek Motion Technologies" Retrieved from "http://en.openei.org/w/index.php?title=Danotek_Motion_Technologies&oldid=344069"

142

Open Standards for Sensor Information Processing  

Science Conference Proceedings (OSTI)

This document explores sensor standards, sensor data models, and computer sensor software in order to determine the specifications and data representation best suited for analyzing and monitoring computer system health using embedded sensor data. We review IEEE 1451, OGC Sensor Model Language and Transducer Model Language (TML), lm-sensors and Intelligent Platform Management Inititative (IPMI).

Pouchard, Line Catherine [ORNL; Poole, Stephen W [ORNL; Lothian, Josh [ORNL

2009-07-01T23:59:59.000Z

143

Active Sensors | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Active Sensors Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Active Sensors Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Remote Sensing Techniques Exploration Sub Group: Active Sensors Parent Exploration Technique: Remote Sensing Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Detect fault and ground movement, delineate faults, create high-resolution DEMS, quantify fault kinemaics, develop lineament maps, Geophysical Monitoring Hydrological: Can give indications about subsurface geothermal fluid flow Thermal: Dictionary.png Active Sensors: Sensors that emit their own source of energy then measure the

144

Alarm sensor apparatus for closures  

DOE Patents (OSTI)

An alarm sensor apparatus for closures such as doors and windows, and particularly for closures having loose tolerances such as overhead doors, garage doors or the like, the sensor apparatus comprising a pair of cooperating bracket members, one being attached to the door facing or framework and the other to the door member, two magnetic sensor elements carried by said bracket members, the bracket members comprising a pair of cooperating orthogonal guide slots and plates and a stop member engageable with one of the sensors for aligning the sensors with respect to each other in all three orthogonal planes when the door is closed.

Carlson, J.A.; Stoddard, L.M.

1984-01-31T23:59:59.000Z

145

Alarm sensor apparatus for closures  

DOE Patents (OSTI)

An alarm sensor apparatus for closures such as doors and windows, and particularly for closures having loose tolerances such as overhead doors, garage doors or the like, the sensor apparatus comprising a pair of cooperating bracket members, one being attached to the door facing or frame work and the other to the door member, two magnetic sensor elements carried by said bracket members, the bracket members comprising a pair of cooperating orthogonal guide slots and plates and a stop member engageable with one of the sensors for aligning the sensors with respect to each other in all three orthogonal planes when the door is closed.

Carlson, James A. (Thornton, CO); Stoddard, Lawrence M. (Arvada, CO)

1986-01-01T23:59:59.000Z

146

Hydrogen Atom in Relativistic Motion  

E-Print Network (OSTI)

The Lorentz contraction of bound states in field theory is often appealed to in qualitative descriptions of high energy particle collisions. Surprisingly, the contraction has not been demonstrated explicitly even in simple cases such as the hydrogen atom. It requires a calculation of wave functions evaluated at equal (ordinary) time for bound states in motion. Such wave functions are not obtained by kinematic boosts from the rest frame. Starting from the exact Bethe-Salpeter equation we derive the equal-time wave function of a fermion-antifermion bound state in QED, i.e., positronium or the hydrogen atom, in any frame to leading order in alpha. We show explicitly that the bound state energy transforms as the fourth component of a vector and that the wave function of the fermion-antifermion Fock state contracts as expected. Transverse photon exchange contributes at leading order to the binding energy of the bound state in motion. We study the general features of the corresponding fermion-antifermion-photon Fock states, and show that they do not transform by simply contracting. We verify that the wave function reduces to the light-front one in the infinite momentum frame.

M. Jarvinen

2004-11-16T23:59:59.000Z

147

An Inexpensive CO Sensor  

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

6 6 An Inexpensive CO Sensor A schematic of the prototype CO passive sensor. Carbon moNOxide is a colorless, odorless, toxic gas whose primary source indoor is the incomplete combustion of fossil fuels. This gas can be a potential problem in any house that uses combustion appliances for space or water heating, cooking, or idling an automobile in an attached garage. Although most appliances work correctly, a problem can exist in houses when the appliance is unventilated or its ventilation system does not properly eliminate exhaust gases from the house. Since Americans spend 90% of their time indoors and 65 to 70% in their residences, understanding how and when CO builds up indoors could save lives. We have very little systematic data on how CO hazards are distrubuted in the indoor environment, but mortality

148

Fiber optic hydrogen sensor  

DOE Green Energy (OSTI)

This report covers the development of fiber optic hydrogen and temperature sensors for monitoring dissolved hydrogen gas in transformer oil. The concentration of hydrogen gas is a measure of the corona and spark discharge within the transformer and reflects the state of health of the transformer. Key features of the instrument include use of palladium alloys to enhance hydrogen sensitivity, a microprocessor controlled instrument with RS-232, liquid crystal readout, and 4-20 ma. current loop interfaces. Calibration data for both sensors can be down loaded to the instrument through the RS-232 interface. This project was supported by the Technology Transfer Initiative in collaboration with J. W. Harley, Inc. through the mechanism of a cooperative research and development agreement (CRADA).

Butler, M.A.; Sanchez, R.; Dulleck, G.R.

1996-05-01T23:59:59.000Z

149

Rigid particulate matter sensor  

DOE Patents (OSTI)

A sensor to detect particulate matter. The sensor includes a first rigid tube, a second rigid tube, a detection surface electrode, and a bias surface electrode. The second rigid tube is mounted substantially parallel to the first rigid tube. The detection surface electrode is disposed on an outer surface of the first rigid tube. The detection surface electrode is disposed to face the second rigid tube. The bias surface electrode is disposed on an outer surface of the second rigid tube. The bias surface electrode is disposed to face the detection surface electrode on the first rigid tube. An air gap exists between the detection surface electrode and the bias surface electrode to allow particulate matter within an exhaust stream to flow between the detection and bias surface electrodes.

Hall, Matthew (Austin, TX)

2011-02-22T23:59:59.000Z

150

NOx Sensor Development  

SciTech Connect

The objectives of this report are: (1) Develop an inexpensive, rapid-response, high-sensitivity and selective electrochemical sensor for oxides of nitrogen (NO{sub x}) for compression-ignition, direct-injection (CIDI) exhaust gas monitoring; (2) Explore and characterize novel, effective sensing methodologies based on impedance measurements; (3) Explore designs and manufacturing methods that could be compatible with mass fabrication; and (4) Collaborate with industry in order to (ultimately) transfer the technology to a supplier for commercialization.

Woo, L Y; Glass, R S

2009-10-27T23:59:59.000Z

151

Underground Distribution Sensors  

Science Conference Proceedings (OSTI)

Rising costs of new infrastructure, increasing demand, and a declining number of available workers will drive utilities to operate as efficiently as possible. The practice of overbuilding infrastructure to improve or maintain reliability will be viewed as cost-inefficient. Utilities will be forced to operate distribution systems more dynamically and efficiently. Distribution sensors will help provide the needed information to utilities to achieve the goal of dynamic efficiency. The Underground Distributi...

2009-03-31T23:59:59.000Z

152

Hydrogen Optical Fiber Sensors  

DOE Green Energy (OSTI)

Optically-based hydrogen sensors promise to deliver an added level of safety as hydrogen and fuel cell technologies enter the mainstream. More importantly, they offer reduced power consumption and lower cost, which are desirable for mass production applications such as automobiles and consumer appliances. This program addressed two of the major challenges previously identified in porous optrode-based optical hydrogen sensors: sensitivity to moisture (ambient humidity), and interference from the oxygen in air. Polymer coatings to inhibit moisture and oxygen were developed in conjunction with newer and novel hydrogen sensing chemistries. The results showed that it is possible to achieve sensitive hydrogen detection and rapid response with minimal interference from oxygen and humidity. As a result of this work, a new and more exciting avenue of investigation was developed: the elimination of the porous optrode and deposition of the sensor chemistry directly into the polymer film. Initial results have been promising, and open up a wider range of potential applications from extended optical fiber sensing networks, to simple plastic "stickers" for use around the home and office.

Lieberman, Robert A.; Beshay, Manal; Cordero, Steven R.

2008-07-28T23:59:59.000Z

153

Ultra-wideband impedance sensor  

DOE Patents (OSTI)

The ultra-wideband impedance sensor (UWBZ sensor, or Z-sensor) is implemented in differential and single-ended configurations. The differential UWBZ sensor employs a sub-nanosecond impulse to determine the balance of an impedance bridge. The bridge is configured as a differential sample-and-hold circuit that has a reference impedance side and an unknown impedance side. The unknown impedance side includes a short transmission line whose impedance is a function of the near proximity of objects. The single-ended UWBZ sensor eliminates the reference side of the bridge and is formed of a sample and hold circuit having a transmission line whose impedance is a function of the near proximity of objects. The sensing range of the transmission line is bounded by the two-way travel time of the impulse, thereby eliminating spurious Doppler modes from large distant objects that would occur in a microwave CW impedance bridge. Thus, the UWBZ sensor is a range-gated proximity sensor. The Z-sensor senses the near proximity of various materials such as metal, plastic, wood, petroleum products, and living tissue. It is much like a capacitance sensor, yet it is impervious to moisture. One broad application area is the general replacement of magnetic sensors, particularly where nonferrous materials need to be sensed. Another broad application area is sensing full/empty levels in tanks, vats and silos, e.g., a full/empty switch in water or petroleum tanks.

McEwan, Thomas E. (Livermore, CA)

1999-01-01T23:59:59.000Z

154

Ultra-wideband impedance sensor  

DOE Patents (OSTI)

The ultra-wideband impedance sensor (UWBZ sensor, or Z-sensor) is implemented in differential and single-ended configurations. The differential UWBZ sensor employs a sub-nanosecond impulse to determine the balance of an impedance bridge. The bridge is configured as a differential sample-and-hold circuit that has a reference impedance side and an unknown impedance side. The unknown impedance side includes a short transmission line whose impedance is a function of the near proximity of objects. The single-ended UWBZ sensor eliminates the reference side of the bridge and is formed of a sample and hold circuit having a transmission line whose impedance is a function of the near proximity of objects. The sensing range of the transmission line is bounded by the two-way travel time of the impulse, thereby eliminating spurious Doppler modes from large distant objects that would occur in a microwave CW impedance bridge. Thus, the UWBZ sensor is a range-gated proximity sensor. The Z-sensor senses the near proximity of various materials such as metal, plastic, wood, petroleum products, and living tissue. It is much like a capacitance sensor, yet it is impervious to moisture. One broad application area is the general replacement of magnetic sensors, particularly where nonferrous materials need to be sensed. Another broad application area is sensing full/empty levels in tanks, vats and silos, e.g., a full/empty switch in water or petroleum tanks. 2 figs.

McEwan, T.E.

1999-03-16T23:59:59.000Z

155

Theory of atomic motion in resonant radiation  

SciTech Connect

Atomic motion in resonant and near resonant electromagnetic radiation is investigated theoretically. The exposition begins with a study of atomic motion in a resonant standing light wave, with a view toward isotope separation by selective photodeflection, and proceeds to the investigation of more general problems of atomic motion in resonant radiation. The body of the work consists of six chapters, each of which was prepared as a manuscript for publication in the open literature.

Cook, R.J.

1980-03-01T23:59:59.000Z

156

General techniques for constrained motion planning  

SciTech Connect

This report presents automatic motion planning algorithms for robotic manipulators performing a variety of tasks. Given a task and a robot manipulator equipped with a tool in its hand, the motion planners compute robot motions to complete the task while respecting manipulator kinematic constraints and avoiding collisions with objects in the robot`s work space. To handle the high complexity of the motion planning problem, a sophisticated search strategy called SANDROS is developed and used to solve many variations of the motion planning problem. To facilitate systematic development of motion planning algorithms, robotic tasks are classified into three categories according to the dimension of the manifold the robot tool has to travel: visit-point (0 dimensional), trace-curve (1 dimensional) and cover-surface (2 dimensional) tasks. The motion planner for a particular dimension is used as a sub-module by the motion planner for the next-higher dimension. This hierarchy of motion planners has led to a set of compact and systematic algorithms that can plan robot motions for many types of robotic operations. In addition, an algorithm is developed that determines the optimal robot-base configuration for minimum cycle time. The SANDROS search paradigm is complete in that it finds a solution path if one exists, up to a user specified resolution. Although its worst-case time complexity is exponential in the degrees of freedom of the manipulator, its average performance is commensurate with the complexity of the solution path. Since solution paths for most of motion planning problems consist of a few monotone segments, the motion planners based on SANDROS search strategy show approximately two-orders of magnitude improvements over existing complete algorithms.

Hwang, Yong K.; Watterberg, P.A.; Chen, Pang, C.; Lewis, C.L.

1997-02-01T23:59:59.000Z

157

Method for motion tracking during tomographic scanning  

Method for motion tracking during tomographic scanning Note: The technology described above is an early stage opportunity. Licensing rights to this intellectual ...

158

VIDEOS: Slow motion video of Charpy impact  

Science Conference Proceedings (OSTI)

Sep 25, 2007 ... This slow motion video of an actual Charpy impact test shows the sample fracturing. The VIMS web resource offers a detailed description of an ...

159

Selecting and Scaling Earthquake Ground Motions for ...  

Science Conference Proceedings (OSTI)

... a) near-fault FD pulse motion with PPV and NCSV shown (Imperial Valley 1979, El ... typically 3 or more) such that, in aggregate, valleys of individual ...

2012-02-16T23:59:59.000Z

160

Lost-motion valve actuator  

SciTech Connect

A lost-motion valve actuator is described for a bore closure valve employed in a well bore, comprising: operating connector means adapted to move the bore closure valve between open and closed positions through longitudinal movement of the operating connector means. The operating connector means comprises an operating connector and a connector insert defining a recess therebetween; locking dog means comprising at least one locking dog received in the recess and spring biasing means adapted to urge at least one locking dog radially inwardly; and mandrel means slidably received within the operating connector means and including dog slot means associated therewith. The dog slot means comprises an annular slot on the exterior of the mandrel means adapted to lockingly receive at least one inwardly biased locking dog when proximate thereto, whereby longitudinal movement of the mandrel means is transmitted to the operating connector means.

Burris, W.J. III; Ringgenberg, P.D.

1987-04-07T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

2 pi-Steradian, Energetic-Ion Sensor  

E-Print Network (OSTI)

Because energetic particles populate both planetary magnetospheres and interplanetary space in significant quantities, energetic-ion sensors have been flown since the beginning of the space age. Early sensors were solid-state detector (SSD) telescopes, with conical fields of view, often swept through a circle by virtue of the spin motion of the spacecraft (e.g., IMP 7 and 8, ISEE 1 and 2). In the 1980s and 1990s, foil/microchannel plate (MCP) time-of-flight (TOF) measurements were added to the energy measurement provided by the SSD (eg, AMPTE/CCE MEPA, Geotail EPIC/ICS, Galileo EPD). The resulting energy and velocity uniquely identified ion mass. More recently, we have developed a 2-D fan acceptance angle sensor that includes both energy and TOF. When mounted on a spinning spacecraft, this 160^\\circ x 12^\\circ FOV sweeps out nearly 4\\pi steradians in one spin. This sensor, dubbed the "hockey puck" for its shape, is currently in flight on MESSENGER (EPS) and New Horizons Pluto (PEPPSI).Increasingly, energetic-...

Mitchell, Donald G

2010-01-01T23:59:59.000Z

162

Shape memory alloy thaw sensors  

SciTech Connect

A sensor permanently indicates that it has been exposed to temperatures exceeding a critical temperature for a predetermined time period. An element of the sensor made from shape memory alloy changes shape when exposed, even temporarily, to temperatures above the austenitic temperature of the shape memory alloy. The shape change of the SMA element causes the sensor to change between two readily distinguishable states. 16 figs.

Shahinpoor, M.; Martinez, D.R.

1998-04-07T23:59:59.000Z

163

Stochastic binary sensor networks for noisy environments  

Science Conference Proceedings (OSTI)

This paper proposes a stochastic framework for detecting anomalies or gathering events of interest in a noisy environment using a network consisting of binary sensors. A binary sensor is an extremely coarse sensor, capable of measuring data to only 1-bit ... Keywords: energy consumption, energy efficiency, noisy environments, sensor networks, simulation, stochastic binary sensors, wireless networks

T. Nguyen; Dong Nguyen; Huaping Liu; Duc A. Tran

2007-07-01T23:59:59.000Z

164

Sensors & Materials | Argonne National Laboratory  

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

and engineering expertise to develop, test, and deploy sensors and materials to detect nuclear and radiological materials, chemical and biological agents and explosives. Argonne...

165

Available Technologies: Plasmonic Nanocube Sensor  

Berkeley Lab researchers Hung-Jen Wu and John T. Groves have developed a plasmonic nanocube sensor – a low cost, label free optical detection tool ...

166

PC Board Mountable Corrosion Sensors  

Sandia National Laboratories has created sensors to identify and assess the pervasive and expensive problem of corrosion in applications ranging from ...

167

Portable Chemical Sensors for Environmental  

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

Chemical Sensors for Environmental and State of Health Monitoring Emerging nano technologies are transforming microsensor research and development, a key enabler of Sandia's...

168

Mobility in Wireless Sensor Networks  

E-Print Network (OSTI)

the 802.15.4 radio (for wireless operation) as well as thewireless sensor network protocol, significant power can be saved during network operations.

Mehta, Ankur Mukesh

2012-01-01T23:59:59.000Z

169

Fluorescent sensor for mercury  

DOE Patents (OSTI)

The present invention provides a sensor for detecting mercury, comprising: a first polynucleotide, comprising a first region, and a second region, a second polynucleotide, a third polynucleotide, a fluorophore, and a quencher, wherein the third polynucleotide is optionally linked to the second region; the fluorophore is linked to the first polynucleotide and the quencher is linked to the second polynucleotide, or the fluorophore is linked to the second polynucleotide and the quencher is linked to the first polynucleotide; the first region and the second region hybridize to the second polynucleotide; and the second region binds to the third polynucleotide in the presence of Hg.sup.2+ ions.

Wang, Zidong (Urbana, IL); Lee, Jung Heon (Evanston, IL); Lu, Yi (Champaign, IL)

2011-11-22T23:59:59.000Z

170

Expendable oceanographic sensor apparatus  

DOE Patents (OSTI)

An expendable oceanographic sensor apparatus is deployed from an airplane or a ship to make oceanographic observations in a profile of the surface-to-ocean floor, while deployed on the floor, and then a second profile when returning to the ocean surface. The device then records surface conditions until on-board batteries fail. All data collected is stored and then transmitted from the surface to either a satellite or other receiving station. The apparatus is provided with an anchor that causes descent to the ocean floor and then permits ascent when the anchor is released. Anchor release is predetermined by the occurrence of a pre-programmed event.

McCoy, Kim O. (Carmel, CA); Downing, Jr., John P. (Port Townsand, WA); DeRoos, Bradley G. (Worthington, OH); Riches, Michael R. (Silver Spring, MD)

1993-01-01T23:59:59.000Z

171

Thin film hydrogen sensor  

DOE Patents (OSTI)

A thin film hydrogen sensor, includes: a substantially flat ceramic substrate with first and second planar sides and a first substrate end opposite a second substrate end; a thin film temperature responsive resistor on the first planar side of the substrate proximate to the first substrate end; a thin film hydrogen responsive metal resistor on the first planar side of the substrate proximate to the fist substrate end and proximate to the temperature responsive resistor; and a heater on the second planar side of the substrate proximate to the first end.

Cheng, Yang-Tse (Rochester Hills, MI); Poli, Andrea A. (Livonia, MI); Meltser, Mark Alexander (Pittsford, NY)

1999-01-01T23:59:59.000Z

172

Optical humidity sensor  

DOE Patents (OSTI)

An optical dielectric humidity sensor is disclosed which includes a dielectric mirror having multiple alternating layers of two porous water-adsorbent dielectric materials with differing indices of refraction carried by a translucent substrate. A narrow-band polarized light source is positioned to direct light energy onto the mirror, and detectors are positioned to receive light energy transmitted through and reflected by the mirror. A ratiometer indicates humidity in the atmosphere which surrounds the dielectric mirror as a function of a ratio of light energies incident on the detectors. 2 figs.

Tarvin, J.A.

1987-02-10T23:59:59.000Z

173

Optical humidity sensor  

SciTech Connect

An optical dielectric humidity sensor which includes a dielectric mirror having multiple alternating layers of two porous water-adsorbent dielectric materials with differing indices of refraction carried by a translucent substrate. A narrow-band polarized light source is positioned to direct light energy onto the mirror, and detectors are positioned to receive light energy transmitted through and reflected by the mirror. A ratiometer indicates humidity in the atmosphere which surrounds the dielectric mirror as a function of a ratio of light energies incident on the detectors.

Tarvin, Jeffrey A. (Ann Arbor, MI)

1987-01-01T23:59:59.000Z

174

Optimization-based interactive motion synthesis  

Science Conference Proceedings (OSTI)

We present a physics-based approach to synthesizing motion of a virtual character in a dynamically varying environment. Our approach views the motion of a responsive virtual character as a sequence of solutions to the constrained optimization problem ... Keywords: Character animation, nonlinear optimization, physics-based animation

Sumit Jain; Yuting Ye; C. Karen Liu

2009-01-01T23:59:59.000Z

175

Heterogeneous wireless sensor network deployment and topology control based on irregular sensor model  

Science Conference Proceedings (OSTI)

Heterogeneous wireless sensor network (heterogeneous WSN) consists of sensor nodes with different ability, such as different computing power and sensing range. Compared with homogeneous WSN, deployment and topology control are more complex in heterogeneous ... Keywords: heterogeneous sensor deployment, irregular sensor model, sensor coverage, topology control, wireless sensor network

Chun-Hsien Wu; Yeh-Ching Chung

2007-05-01T23:59:59.000Z

176

Fiber optic temperature sensor  

SciTech Connect

Our fiber optic temperature measurement sensor and system is a major improvement over methods currently in use in most industrial processes, and it delivers all of the attributes required simplicity, accuracy, and cost efficiency-to help improve all of these processes. Because temperature is a basic physical attribute of nearly every industrial and commercial process, our system can eventually result in significant improvements in nearly every industrial and commercial process. Many finished goods, and the materials that go into them, are critically dependent on the temperature. The better the temperature measurement, the better quality the goods will be and the more economically they can be produced. The production and transmission of energy requires the monitoring of temperature in motors, circuit breakers, power generating plants, and transmission line equipment. The more reliable and robust the methods for measuring these temperature, the more available, stable, and affordable the supply of energy will become. The world is increasingly realizing the threats to health and safety of toxic or otherwise undesirable by products of the industrial economy in the environment. Cleanup of such contamination often depends on techniques that require the constant monitoring of temperature in extremely hazardous environments, which can damage most conventional temperature sensors and which are dangerous for operating personnel. Our system makes such monitoring safer and more economical.

Rabold, D.

1995-12-01T23:59:59.000Z

177

Passive blast pressure sensor  

DOE Patents (OSTI)

A passive blast pressure sensor for detecting blast overpressures of at least a predetermined minimum threshold pressure. The blast pressure sensor includes a piston-cylinder arrangement with one end of the piston having a detection surface exposed to a blast event monitored medium through one end of the cylinder and the other end of the piston having a striker surface positioned to impact a contact stress sensitive film that is positioned against a strike surface of a rigid body, such as a backing plate. The contact stress sensitive film is of a type which changes color in response to at least a predetermined minimum contact stress which is defined as a product of the predetermined minimum threshold pressure and an amplification factor of the piston. In this manner, a color change in the film arising from impact of the piston accelerated by a blast event provides visual indication that a blast overpressure encountered from the blast event was not less than the predetermined minimum threshold pressure.

King, Michael J.; Sanchez, Roberto J.; Moss, William C.

2013-03-19T23:59:59.000Z

178

Disens: scalable distributed sensor network simulation  

Science Conference Proceedings (OSTI)

Simulation is widely used for developing, evaluating and analyzing sensor network applications, especially when deploying a large scale sensor network remains expensive and labor intensive. However, due to its computation intensive nature, existent simulation ... Keywords: distributed simulation, sensor network, simulation

Ye Wen; Rich Wolski; Gregory Moore

2007-03-01T23:59:59.000Z

179

Use of sensors in monitoring civil structures  

E-Print Network (OSTI)

This thesis surveys the use of sensors and sensor networks in monitoring civil structures, with particular emphasis on the monitoring of bridges and highways using fiber optic sensors. Following a brief review of the most ...

Daher, Bassam William, 1979-

2004-01-01T23:59:59.000Z

180

Image Registration Using Wavelet-Based Motion Model  

Science Conference Proceedings (OSTI)

An image registration algorithm is developed to estimate dense motion vectors between two images using the coarse-to-fine wavelet-based motion model. This motion model is described by a linear combination of hierarchical basis functions proposed by Cai ... Keywords: Cai-Wang wavelet, coarse-to-fine motion pyramid, image registration, sum squared difference (SSD), warping, wavelet-based motion model

Yu-Te Wu; Takeo Kanade; Ching-Chung Li; Jeffrey Cohn

2000-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Security for wireless sensor networks  

Science Conference Proceedings (OSTI)

This chapter identifies the vulnerabilities associated with the operational paradigms currently employed by Wireless Sensor Networks. A survey of current WSN security research is presented. The security issues of Mobile Ad-Hoc Networks and infrastructure ... Keywords: WSN, security, sensor networks, wireless

Sasikanth Avancha; Jeffrey Undercoffer; Anupam Joshi; John Pinkston

2004-01-01T23:59:59.000Z

182

Substation Sensor Database Version 1.0  

Science Conference Proceedings (OSTI)

The Substation Sensor database provides utilities with a searchable list of sensors available to be applied in substation applications. The Substation Sensor Database provides a searchable database of sensors available to substation engineers, categorized by Area, Component, Sub-Component, Parameter, and Technology. By specifying each category, the list can be filtered to a sub-set of sensors. By clicking on a sensorname, details can be viewed including a description, sensor maturity, and a link to the m...

2010-11-10T23:59:59.000Z

183

Energy efficient sensor network implementations  

Science Conference Proceedings (OSTI)

In this paper, we discuss a low power embedded sensor node architecture we are developing for distributed sensor network systems deployed in a natural environment. In particular, we examine the sensor node for energy efficient processing-at-the-sensor. We analyze the following modes of operation; event detection, sleep(wake-up), data acquisition, data processing modes using low power, high performance embedded technology such as specialized embedded DSP processors and a low power FPGAs at the sensing node. We use compute intensive sensor node applications: an acoustic vehicle classifier (frequency domain analysis) and a video license plate identification application (learning algorithm) as a case study. We report performance and total energy usage for our system implementations and discuss the system architecture design trade offs.

Frigo, Janette R [Los Alamos National Laboratory; Raby, Eric Y [Los Alamos National Laboratory; Brennan, Sean M [Los Alamos National Laboratory; Kulathumani, Vinod [WEST VIRGINIA UNIV.; Rosten, Ed [CAMBRIDGE UNIV.; Wolinski, Christophe [IRISA; Wagner, Charles [IRISA; Charot, Francois [IRISA

2009-01-01T23:59:59.000Z

184

Methods for predicting rubble motion during blasting  

SciTech Connect

Recent applications of explosives and blasting agents to rubble rock have led to requirements for more elaborate design and analysis methods. Many in situ extraction techniques require rubblization to take place in a confined region where rock motion is a predominate factor in creating a permeable broken bed. Two analytical methods are presented which describe the large rubble motion during blasting. These methods are intended to provide the blast designer with a tool for evaluation and further refinement of blasting patterns and timing sequences. In both these methods, the rock medium is represented by a series of discrete, discontinuous regions (bodies, masses). The use of discontinuous techniques rather than the classical continuum methods, results in better approximations to the rubble motion. These regions are set in motion by pressure loads from the explosive. The motion of these regions is then calculated numerically using interaction laws between regions in contact. The basis for these models or methods is presented along with the background for selecting explosive pressure loads and rock mass material behavior. Typical examples, including both cratering and bench blasting geometries, are discussed which illustrate the use of these models to predict rubble motion. Such engineering representations appear to provide a practical method for use in predicting rubble motion and a tool for design evaluation of blasting in confined geometries.

Schamaun, J.T.

1984-03-01T23:59:59.000Z

185

Novel Zigzag Shape Gives Sensors Magnetic Appeal  

Science Conference Proceedings (OSTI)

... Institute of Standards and Technology (NIST) have designed tiny magnetic sensors in a "zigzag" shape that are ... Zigzag-shaped magnetic sensors. ...

2013-01-22T23:59:59.000Z

186

Category:Passive Sensors | Open Energy Information  

Open Energy Info (EERE)

Imaging P Passive Sensors S Stereo Satellite Imagery SWIR Retrieved from "http:en.openei.orgwindex.php?titleCategory:PassiveSensors&oldid594073" Category: Remote Sensing...

187

Energy Harvesting Support for Sensor Networking  

E-Print Network (OSTI)

Networked Sensing Energy Harvesting Support for SensorLifetime or Per formance Energy Harvesting System life andProposed Solution: Energy Harvesting Support for sensor

Jason Hsu; Aman Kansal; Mani Srivastava

2004-01-01T23:59:59.000Z

188

Wireless Temperature Sensors for Improved HVAC Control  

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

reliable, and affordable and affordable Wireless Temperature Sensors for Improved HVAC Control An assessment of wireless sensor technology Executive Summary This Technology...

189

HVAC Sensors, Controls, and Human Feedback Interfaces  

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

HVAC Sensors, HVAC Sensors, Controls, and Human Controls, and Human Feedback Interfaces Feedback Interfaces April 26, 2010 Dr. Amr Gado Emerson Climate Technologies Heating And...

190

Gas sensor incorporating a porous framework  

DOE Patents (OSTI)

The disclosure provides sensor for gas sensing including CO.sub.2 gas sensors comprising a porous framework sensing area for binding an analyte gas.

Yaghi, Omar M.; Czaja, Alexander U.; Wang, Bo; Furukawa, Hiroyasu; Galatsis, Kosmas; Wang, Kang L.

2013-07-09T23:59:59.000Z

191

Smart Grid Applications Using Sensor Web Services .  

E-Print Network (OSTI)

??Sensor network web services have recently emerged as promising tools to provide remote management, data collection and querying capabilities for sensor networks. They can be… (more)

Asad, Omar

2011-01-01T23:59:59.000Z

192

Building Technologies Office: Sensors and Controls Research  

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

Sensors and Controls Sensors and Controls Research to someone by E-mail Share Building Technologies Office: Sensors and Controls Research on Facebook Tweet about Building Technologies Office: Sensors and Controls Research on Twitter Bookmark Building Technologies Office: Sensors and Controls Research on Google Bookmark Building Technologies Office: Sensors and Controls Research on Delicious Rank Building Technologies Office: Sensors and Controls Research on Digg Find More places to share Building Technologies Office: Sensors and Controls Research on AddThis.com... About Take Action to Save Energy Partner with DOE Activities Appliances Research Building Envelope Research Windows, Skylights, & Doors Research Space Heating & Cooling Research Water Heating Research Lighting Research

193

TEST & MOTION SIMULATION SYSTEMSSERVOTEST Tailored Solutions For Your Servohydraulic  

E-Print Network (OSTI)

TEST & MOTION SIMULATION SYSTEMSSERVOTEST SERVOTEST ACTUATORS Tailored Solutions For Your Servohydraulic Test And Motion Simulation System Requirements #12;TEST & MOTION SIMULATION SYSTEMSSERVOTEST qualified engineers · Founded in 1958 as a Consultancy to service the growing test market · International

194

Normal-Mode Decomposition of Small-Scale Oceanic Motions  

Science Conference Proceedings (OSTI)

Small-scale oceanic motions consist of vortical motion and internal waves. In a linear or weakly nonlinear system these two types of motions can be unambiguously separated using normal-mode decomposition in which the vortical mode carries the ...

Ren-Chieh Lien; Peter Müller

1992-12-01T23:59:59.000Z

195

Friction control using ultrasonic oscillation for rolling-element linear-motion guide  

Science Conference Proceedings (OSTI)

This article reports a friction-control method for rolling-element linear-motion guides used for precision positioning. In general, static friction greater than dynamic friction generates stick-slip motion and diminishes the positioning accuracy. Two ultrasonic actuators excite both the rail and the carriage of the guide to give relative displacements to bearing surfaces. In order to effectively propagate the vibration over the entire rail without damping, the actuator drives at that frequency with a half wavelength corresponding to the distances between the rail mounting bolts. This also minimizes undesirable vibration of the machine structure. Moreover, the bearing surfaces of the carriage are resonated by a second ultrasonic actuator. The experiments using a force sensor showed that the static and dynamic friction forces were reduced by approximately 25% at any place on the 600-mm-long rail. Moreover, excitation only at very low velocity decreased the static friction peak.

Oiwa, Takaaki [Shizuoka University, 3-5-1 Hamamatsu, Shizuoka 432-8651 (Japan)

2006-01-15T23:59:59.000Z

196

Infrasound Sensor Models and Evaluations  

Science Conference Proceedings (OSTI)

Sandia National Laboratories has continued to evaluate the performance of infrasound sensors that are candidates for use by the International Monitoring System (IMS) for the Comprehensive Nuclear-Test-Ban Treaty Organization. The performance criteria against which these sensors are assessed are specified in ``Operational Manual for Infra-sound Monitoring and the International Exchange of Infrasound Data''. This presentation includes the results of efforts concerning two of these sensors: (1) Chaparral Physics Model 5; and (2) CEA MB2000. Sandia is working with Chaparral Physics in order to improve the capability of the Model 5 (a prototype sensor) to be calibrated and evaluated. With the assistance of the Scripps Institution of Oceanography, Sandia is also conducting tests to evaluate the performance of the CEA MB2000. Sensor models based on theoretical transfer functions and manufacturer specifications for these two devices have been developed. This presentation will feature the results of coherence-based data analysis of signals from a huddle test, utilizing several sensors of both types, in order to verify the sensor performance.

KROMER,RICHARD P.; MCDONALD,TIMOTHY S.

2000-07-31T23:59:59.000Z

197

Department of Energy Files Motion to Withdraw Yucca Mountain...  

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

Files Motion to Withdraw Yucca Mountain License Application Department of Energy Files Motion to Withdraw Yucca Mountain License Application March 3, 2010 - 12:00am Addthis...

198

Motion to Withdraw from Yucca Mountain application | Department...  

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

Motion to Withdraw from Yucca Mountain application Motion to Withdraw from Yucca Mountain application DOE's withdraws it's pending license application for a permanent geologic...

199

DOE Opposes Injunction Motion | Department of Energy  

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

the State of Washington's motion to enjoin the Department's efforts to wind down the Yucca Mountain Program. The Department's filing, made in the U.S. Court of Appeals for the...

200

Planning and Teaching Compliant Motion Strategies  

E-Print Network (OSTI)

This thesis presents a new high level robot programming system. The programming system can be used to construct strategies consisting of compliant motions, in which a moving robot slides along obstacles in its ...

Buckley, Stephen J.

1987-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Atomistic Simulation of Slow Grain Boundary Motion  

E-Print Network (OSTI)

Existing atomistic simulation techniques to study grain boundary motion are usually limited to either high velocities or temperatures and are difficult to compare to realistic experimental conditions. Here we introduce an ...

Deng, Chuang

202

Earthquake ground motion modeling on parallel computers  

Science Conference Proceedings (OSTI)

We describe the design and discuss the performance of a parallel elastic wave propagation simulator that is being used to model and study earthquake-induced ground motion in large sedimentary basins. The components of the system include mesh generators, ...

Hesheng Bao; Jacobo Bielak; Omar Ghattas; Loukas F. Kallivokas; David R. O'Hallaron; Jonathan R. Shewchuk; Jifeng Xu

1996-11-01T23:59:59.000Z

203

Vertical Motion of Neutrally Buoyant Floats  

Science Conference Proceedings (OSTI)

The vertical motion of a neutrally buoyant float is determined from the solution to the nonlinear forced harmonic oscillator equation originally set forth by Voorhis. Float response to forced vertical oscillations is characterized by the response ...

Louis Goodman; Edward R. Levine

1990-02-01T23:59:59.000Z

204

Equations of Motion Using Thermodynamic Coordinates  

Science Conference Proceedings (OSTI)

The forms of the primitive equations of motion and continuity are obtained when an arbitrary thermodynamic state variable=mrestricted only to be vertically monotonic=mis used as the vertical coordinate. Natural generalizations of the Montgomery ...

Roland A. de Szoeke

2000-11-01T23:59:59.000Z

205

Special Issue "Underwater Sensor Nodes and Underwater Sensor Networks" A special issue of Sensors (ISSN 1424-8220)  

E-Print Network (OSTI)

Special Issue "Underwater Sensor Nodes and Underwater Sensor Networks" A special issue of Sensors (ISSN 1424-8220) Website: http://www.mdpi.com/journal/sensors/special_issues/underwater_sens Journal prediction, oil monitoring and so on. This special issue tries to collect the recent advances on underwater

Chen, Min

206

Collective motion in quantum diffusive environment  

E-Print Network (OSTI)

The general problem of dissipation in macroscopic large-amplitude collective motion and its relation to energy diffusion of intrinsic degrees of freedom of a nucleus is studied. By applying the cranking approach to the nuclear many-body system, a set of coupled dynamical equations for the collective classical variable and the quantum mechanical occupancies of the intrinsic nuclear states is derived. Different dynamical regimes of the intrinsic nuclear motion and its consequences on time properties of collective dissipation are discussed.

V. M. Kolomietz; S. Å berg; S. V. Radionov

2007-06-16T23:59:59.000Z

207

Ground Motion Model of the SLAC Site ?  

E-Print Network (OSTI)

motion p(?, L) can be written as p(?, L) = p(?)2(1 ? c(?, L)) which in turn can be transformed into P(?, k) [9]. We present a ground motion model for the SLAC site. This Measurements [2, 6] show that the fast motion in a rea-model is based on recent ground motion studies performed sonably quiet site consists primarily of elastic waves prop-at SLAC as well as on historical data. The model includes agating with a high velocity v (of the order of km/s). wave-like, diffusive and systematic types of motion. An The correlation is then completely defined by this velocity attempt is made to relate measurable secondary properties (which may be a function of frequency) and by the distri-of the ground motion with more basic characteristics such bution of the noise sources. In the case where the waves as the layered geological structure of the surrounding earth, propagate on the surface and are distributed uniformly in depth of the tunnel, etc. This model is an essential step in azimuthal angle, the correlation is given by c(?, L) = evaluating sites for a future linear collider. ?cos(?L/v cos(?))?? = J0(?L/v) and the corresponding 2-D spectrum of the ground motion is P(?, k) = 2p(?) / ? (?/v(f)) 2 ? k2, |k | ? ?/v(f). The absolute power spectrum of the fast motion, assumed for the SLAC model, corresponds to measurements performed at 2 AM in one of the quietest locations at SLAC, sector 10 of the linac [2], (see Fig.1). The spatial properties are defined by the phase velocity found from correlation measurements v(f) = 450 + 1900 exp(?f/2) (with v in m/s, f in Hz) [2]. 1

Andrei Seryi; Tor Raubenheimer

2000-01-01T23:59:59.000Z

208

for distributed wireless sensor networks  

E-Print Network (OSTI)

MEMS technology is enabling the development of inexpensive, autonomous wireless sensor nodes with volumes ranging from cubic mm to several cubic cm. These tiny sensor nodes can form rapidly deployed, massive distributed networks to allow unobtrusive, spatially dense, sensing and communication. MEMS enable these devices by reducing both the volume and energy consumption of various components. This paper will review some of the wireless sensor nodes under development and applicable MEMS devices for small and efficient optical communication, micropower generation, and sensing. In addition, CMOS post-process micromachining will be discussed as a method of achieving low cost and high integration. 1.

Brett A. Warneke; Kristofer S. J. Pister

2002-01-01T23:59:59.000Z

209

Help:Motion Chart | Open Energy Information  

Open Energy Info (EERE)

Motion Chart Motion Chart Jump to: navigation, search This page is designed to help you create your very own Google Motion Chart, or Gapminder-like visualization. You'll work in Google Docs to develop the motion chart and with the OpenEI team to publish it on OpenEI. About The motion chart is a cool way to display data that changes over time. The dynamic chart allows you to quickly explore a lot of data with a fairly easy-to-use interface. The example below displays page visit and usage statistics for openei.org. Google motion chart (Gapminder): Getting Started Here is what you'll need from the start: View of a google doc with OpenEI analytics data A Google account Data (time series data with at least 2 fields) An OpenEI user account Step 1 - The Data The data to the right is a view of some OpenEI use statistics from the past

210

On the Kinematics of Undulator Girder Motion  

SciTech Connect

The theory of rigid body kinematics is used to derive equations that govern the control and measurement of the position and orientation of undulator girders. The equations form the basis of the girder matlab software on the LCLS control system. The equations are linear for small motion and easily inverted as desired. For reference, some relevant girder geometrical data is also given. Equations 6-8 relate the linear potentiometer readings to the motion of the girder. Equations 9-11 relate the cam shaft angles to the motion of the girder. Both sets are easily inverted to either obtain the girder motion from the angles or readings, or, to find the angles and readings that would give a desired motion. The motion of any point on the girder can be calculated by applying either sets of equations to the two cam-planes and extrapolating in the z coordinate using equation 19. The formulation of the equations is quite general and easily coded via matrix and vector methods. They form the basis of the girder matlab software on the LCLS control system.

Welch, J

2011-08-18T23:59:59.000Z

211

Shape, motion, and inertial parameter estimation of space objects using teams of cooperative vision sensors  

Science Conference Proceedings (OSTI)

Future space missions are expected to use autonomous robotic systems to carry out a growing number of tasks. These tasks may include the assembly, inspection, and maintenance of large space structures; the capture and servicing of satellites; and the ...

Matthew D. Lichter / Steven Dubowsky

2005-01-01T23:59:59.000Z

212

Estimating Mooring Motion when the Pressure Sensors Fail: A Method Employing Inverted Echo Sounders  

Science Conference Proceedings (OSTI)

In the presence of a strong current, such as the Gulf Stream or the North Atlantic Current, current meter moorings are known to “blow over” due to drag from the moving water. This dipping of the current meters, which has been documented to exceed ...

Christopher S. Meinen; Douglas S. Luther

2002-09-01T23:59:59.000Z

213

DISTRIBUTED SENSOR FUSION USING DYNAMIC CONSENSUS  

E-Print Network (OSTI)

DISTRIBUTED SENSOR FUSION USING DYNAMIC CONSENSUS Demetri P. Spanos Richard M. Murray California in the underlying network topology and performance, making it an interesting candidate for sensor fusion, Decentralized systems, Graph theoretic models, Sensor Fusion 1. INTRODUCTION Sensor networks are a prominent

Murray, Richard M.

214

Wireless sensor networks for habitat monitoring  

Science Conference Proceedings (OSTI)

We provide an in-depth study of applying wireless sensor networks to real-world habitat monitoring. A set of system design requirements are developed that cover the hardware design of the nodes, the design of the sensor network, and the capabilities ... Keywords: environmental monitoring, habitat monitoring, low power systems, sensor network architecture, wireless sensor networks

Alan Mainwaring; David Culler; Joseph Polastre; Robert Szewczyk; John Anderson

2002-09-01T23:59:59.000Z

215

Multiple sensors with single HVAC system control  

E-Print Network (OSTI)

sensor; HVAC; control system; optimization; multi channeloptimization method is designed to be independent of the HVAC

Lin, Craig; Federspiel, Clifford; Auslander, David

2002-01-01T23:59:59.000Z

216

Effects of Pressure on Oxygen Sensors  

Science Conference Proceedings (OSTI)

To measure the effects of pressure on the output of a membrane oxygen sensor and a nonmembrane oxygen sensor, the authors pressure cycled a CTD sensor package in a laboratory pressure facility. The CTD sensor package was cycled from 30 to 6800 db ...

M. J. Atkinson; F. I. M. Thomas; N. Larson

1996-12-01T23:59:59.000Z

217

Secure multidimensional range queries in sensor networks  

Science Conference Proceedings (OSTI)

Most future large-scale sensor networks are expected to follow a two-tier architecture which consists of resource-rich master nodes at the upper tier and resource-poor sensor nodes at the lower tier. Sensor nodes submit data to nearby master nodes which ... Keywords: multidimensional range query, security, sensor networks,

Rui Zhang; Jing Shi; Yanchao Zhang

2009-05-01T23:59:59.000Z

218

A logic approach to virtual sensor networks  

Science Conference Proceedings (OSTI)

This paper presents a technique that builds a layer of virtual sensors over a sensor network. The virtual sensors are able to infer and provide data for the physical sensors that do not work. The key assumption of our approach is that the physical quantities ...

Luciano Caroprese; Carmela Comito; Domenico Talia; Ester Zumpano

2010-08-01T23:59:59.000Z

219

Argonne TDC: Sensor Technology Available for Licensing  

Emergency Response. Engineering. Environmental Research. Fuel Cells. Imaging Technology. Material Science. Nanotechnology. Physical Sciences. Sensor ...

220

Hydrogen Sensor Testing, Hydrogen Technologies (Fact Sheet)  

DOE Green Energy (OSTI)

Factsheet describing the hydrogen sensor testing laboratory at the National Renewable Energy Laboratory.

Not Available

2008-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Semantic Sensor Net: an extensible framework  

Science Conference Proceedings (OSTI)

Existing approaches for sensor networks suffer from a number of serious drawbacks, including assumption of homogeneous sensor nodes, application-dependency, engineering-orientation, and lack of interoperability. To overcome these drawbacks, we ... Keywords: architecture, data processing, dynamic tagging, framework, semantic information, semantic sensor net, semantics, sensor networks

Lionel M. Ni; Yanmin Zhu; Jian Ma; Qiong Luo; Yunhao Liu; S. C. Cheung; Qiang Yang; Minglu Li; Min-you Wu

2009-04-01T23:59:59.000Z

222

Airborne Infrared Target Tracking with the Nintendo Wii Remote Sensor  

E-Print Network (OSTI)

Intelligence, surveillance, and reconnaissance unmanned aircraft systems (UAS) are the most common variety of UAS in use today and provide invaluable capabilities to both the military and civil services. Keeping the sensors centered on a point of interest for an extended period of time is a demanding task requiring the full attention and cooperation of the UAS pilot and sensor operator. There is great interest in developing technologies which allow an operator to designate a target and allow the aircraft to automatically maneuver and track the designated target without operator intervention. Presently, the barriers to entry for developing these technologies are high: expertise in aircraft dynamics and control as well as in real- time motion video analysis is required and the cost of the systems required to flight test these technologies is prohibitive. However, if the research intent is purely to develop a vehicle maneuvering controller then it is possible to obviate the video analysis problem entirely. This research presents a solution to the target tracking problem which reliably provides automatic target detection and tracking with low expense and computational overhead by making use of the infrared sensor from a Nintendo Wii Remote Controller.

Beckett, Andrew 1984-

2012-12-01T23:59:59.000Z

223

Aircraft Cabin Environmental Quality Sensors  

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

Aircraft Cabin Environmental Quality Sensors Aircraft Cabin Environmental Quality Sensors Title Aircraft Cabin Environmental Quality Sensors Publication Type Report Year of Publication 2004 Authors Gundel, Lara A., Thomas W. Kirchstetter, Michael Spears, and Douglas P. Sullivan Keywords carbon monoxide, ozone Abstract Identification of aircraft cabin environmental quality concerns for which sensors may be useful The highest priority environmental indicators identified are ozone and cabin air pressure, followed by carbon monoxide and carbon dioxide with moderate priority, and then relative humidity, airborne particles, and organic contaminants, including engine oil byproducts and pesticides. This list is based on the Congressional requirements and recent scientific literature, starting with information from recent studies (NAS/NRC, ASHRAE/Battelle), and continuing by seeking input from a variety of stakeholders.

224

Functionalized nanoparticles for sensor applications.  

Science Conference Proceedings (OSTI)

We will describe our work on functionalized arrays of nanoparticles crosslinked with short conducting molecules that contain sensing functionalities. These bridging ligands modulate their conductivity based on their interaction with analytes. This functionalized nanoparticles organic ligand composite material once it is assembled between nanogaps electrodes will provide nanosized sensors that can be easily interrogated. These nanogap sensors will be engineered so that they can be fabricated into arrays of different sensor elements. This project consists of a number of different requirements that must be met in order to enable the use of functionalized nanoparticles for sensor applications. The first requirement is the appropriately functionalized nanoparticle. The second is a method to assemble the particles. The third requirement is the generation of a nanogap to contain the nanoparticles. The successes in each of these areas will be discussed as will the sensing behavior of the final films.

Simonson, Robert Joseph; Childs, Kenton David; Howell, Stephen Wayne; Dirk, Shawn M.; Wheeler, David Roger

2005-09-01T23:59:59.000Z

225

Simulating networks of wireless sensors  

Science Conference Proceedings (OSTI)

Recent advances in low-power embedded processors, radios, and micro-mechanical systems (MEMs) have made possible the development of networks of wirelessly interconnected sensors. With their focus on applications requiring tight coupling with the physical ...

Sung Park; Andreas Savvides; Mani B. Srivastava

2001-12-01T23:59:59.000Z

226

Compact orthogonal NMR field sensor  

DOE Patents (OSTI)

A Compact Orthogonal Field Sensor for emitting two orthogonal electro-magnetic fields in a common space. More particularly, a replacement inductor for existing NMR (Nuclear Magnetic Resonance) sensors to allow for NMR imaging. The Compact Orthogonal Field Sensor has a conductive coil and a central conductor electrically connected in series. The central conductor is at least partially surrounded by the coil. The coil and central conductor are electrically or electro-magnetically connected to a device having a means for producing or inducing a current through the coil and central conductor. The Compact Orthogonal Field Sensor can be used in NMR imaging applications to determine the position and the associated NMR spectrum of a sample within the electro-magnetic field of the central conductor.

Gerald, II, Rex E. (Brookfield, IL); Rathke, Jerome W. (Homer Glen, IL)

2009-02-03T23:59:59.000Z

227

Reliable networks with unreliable sensors  

Science Conference Proceedings (OSTI)

Wireless sensor networks (WSNs) deployed in hostile environments suffer from a high rate of node failure. We investigate the effect of such failure rate on network connectivity. We provide a formal analysis that establishes the relationship between node ...

Srikanth Sastry; Tsvetomira Radeva; Jianer Chen; Jennifer L. Welch

2011-01-01T23:59:59.000Z

228

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

229

Sensor applications of carbon nanotubes  

E-Print Network (OSTI)

A search of published research on sensing mechanisms of carbon nanotubes was performed to identify applications in which carbon nanotubes might improve on current sensor technologies, in either offering improved performance, ...

Rushfeldt, Scott I

2005-01-01T23:59:59.000Z

230

Particulate matter sensor with a heater  

DOE Patents (OSTI)

An apparatus to detect particulate matter. The apparatus includes a sensor electrode, a shroud, and a heater. The electrode measures a chemical composition within an exhaust stream. The shroud surrounds at least a portion of the sensor electrode, exclusive of a distal end of the sensor electrode exposed to the exhaust stream. The shroud defines an air gap between the sensor electrode and the shroud and an opening toward the distal end of the sensor electrode. The heater is mounted relative to the sensor electrode. The heater burns off particulate matter in the air gap between the sensor electrode and the shroud.

Hall, Matthew (Austin, TX)

2011-08-16T23:59:59.000Z

231

Response Relationship Between Juvenile Salmon and an Autonomous Sensor in Turbulent Flows  

Science Conference Proceedings (OSTI)

Juvenile fall chinook salmon (Oncorhynchus tshawythscha) and an autonomous sensor device (Sensor Fish) were exposed to turbulent shear flows in order to determine how hydraulic conditions effected fish injury response. Studies were designed to establish correlation metrics between Sensor Fish device measurements and live fish injuries by conducting concurrent releases in a range of turbulent shear flows. Comparisons were made for two exposure scenarios. In the fast-fish-to-slow-water scenario, test fish were carried by the fast-moving water of a submerged turbulent jet and exposed into the standing water of a flume. In the slow-fish-to-fast-water scenario, test fish were introduced into a turbulent jet from standing water through an introduction tube placed just outside the edge of the jet. Motion-tracking analysis was performed on high-speed, high-resolution digital videos of all the releases at water jet velocities ranging from 3 to 22.9 m · s?1. Velocities of the Sensor Fish were very similar to those of live fish, but maximum accelerations of live fish were larger than those by Sensor Fish for all the nozzle velocities of both cenarios. A 10% probability of major injury threshold was found to occur at sensor fish accelerations of 513 and 260 (m · s?2) for the fast-fish-to-slow-water and slow-fish-to-fast-water scenarios, respectively. The findings provide a linkage between laboratory experiments of fish injury, field survival studies, and numerical modeling.

Richmond, Marshall C.; Deng, Zhiqun; McKinstry, Craig A.; Mueller, Robert P.; Carlson, Thomas J.; Dauble, Dennis D.

2009-04-01T23:59:59.000Z

232

Novel Sensor for Transformer Diagnosis  

Science Conference Proceedings (OSTI)

This report details the progress made in the detection of acetylene and hydrogen gas dissolved in oil using novel methods of optical fiber sensing. Of note in this report are the sensitivity and resolution enhancements of the two sensing methods as well as the construction of a field-testable prototype. The sensor’s non-sensitivity to several other gases commonly found in insulating transformer oil is also described. With some further development, the resolution of gas detection can still be ...

2012-12-12T23:59:59.000Z

233

Micromechanical potentiometric sensors  

DOE Green Energy (OSTI)

A microcantilever potentiometric sensor utilized for detecting and measuring physical and chemical parameters in a sample of media is described. The microcantilevered spring element includes at least one chemical coating on a coated region, that accumulates a surface charge in response to hydrogen ions, redox potential, or ion concentrations in a sample of the media being monitored. The accumulation of surface charge on one surface of the microcantilever, with a differing surface charge on an opposing surface, creates a mechanical stress and a deflection of the spring element. One of a multitude of deflection detection methods may include the use of a laser light source focused on the microcantilever, with a photo-sensitive detector receiving reflected laser impulses. The microcantilevered spring element is approximately 1 to 100 .mu.m long, approximately 1 to 50 .mu.m wide, and approximately 0.3 to 3.0 .mu.m thick. An accuracy of detection of deflections of the cantilever is provided in the range of 0.01 nanometers of deflection. The microcantilever apparatus and a method of detection of parameters require only microliters of a sample to be placed on, or near the spring element surface. The method is extremely sensitive to the detection of the parameters to be measured.

Thundat, Thomas G. (Knoxville, TN)

2000-01-01T23:59:59.000Z

234

Micromechanical calorimetric sensor  

DOE Patents (OSTI)

A calorimeter sensor apparatus is developed utilizing microcantilevered spring elements for detecting thermal changes within a sample containing biomolecules which undergo chemical and biochemical reactions. The spring element includes a bimaterial layer of chemicals on a coated region on at least one surface of the microcantilever. The chemicals generate a differential thermal stress across the surface upon reaction of the chemicals with an analyte or biomolecules within the sample due to the heat of chemical reactions in the sample placed on the coated region. The thermal stress across the spring element surface creates mechanical bending of the microcantilever. The spring element has a low thermal mass to allow detection and measuring of heat transfers associated with chemical and biochemical reactions within a sample placed on or near the coated region. A second surface may have a different material, or the second surface and body of microcantilever may be of an inert composition. The differential thermal stress between the surfaces of the microcantilever create bending of the cantilever. Deflections of the cantilever are detected by a variety of detection techniques. The microcantilever may be approximately 1 to 200 .mu.m long, approximately 1 to 50 .mu.m wide, and approximately 0.3 to 3.0 .mu.m thick. A sensitivity for detection of deflections is in the range of 0.01 nanometers. The microcantilever is extremely sensitive to thermal changes in samples as small as 30 microliters.

Thundat, Thomas G. (Knoxville, TN); Doktycz, Mitchel J. (Knoxville, TN)

2000-01-01T23:59:59.000Z

235

Beam current sensor  

DOE Patents (OSTI)

A current sensor for measuring the dc component of a beam of charged particles employs a superconducting pick-up loop probe, with twisted superconducting leads in combination with a Superconducting Quantum Interference Device (SQUID) detector. The pick-up probe is in the form of a single-turn loop, or a cylindrical toroid, through which the beam is directed and within which a first magnetic flux is excluded by the Meisner effect. The SQUID detector acts as a flux-to-voltage converter in providing a current to the pick-up loop so as to establish a second magnetic flux within the electrode which nulls out the first magnetic flux. A feedback voltage within the SQUID detector represents the beam current of the particles which transit the pick-up loop. Meisner effect currents prevent changes in the magnetic field within the toroidal pick-up loop and produce a current signal independent of the beam's cross-section and its position within the toroid, while the combination of superconducting elements provides current measurement sensitivities in the nano-ampere range.

Kuchnir, M.; Mills, F.E.

1984-09-28T23:59:59.000Z

236

Calorimetric gas sensor  

DOE Patents (OSTI)

A combustible gas sensor that uses a resistively heated, noble metal-coated, micromachined polycrystalline Si filament to calorimetrically detect the presence and concentration of combustible gases. The filaments tested to date are 2 .mu.m thick.times.10 .mu.m wide.times.100, 250, 500, or 1000 .mu.m-long polycrystalline Si; some are overcoated with a 0.25 .mu.m-thick protective CVD Si.sub.3 N.sub.4 layer. A thin catalytic Pt film was deposited by CVD from the precursor Pt(acac).sub.2 onto microfilaments resistively heated to approximately 500.degree. C.; Pt deposits only on the hot filament. Using a constant-resistance-mode feedback circuit, Pt-coated filaments operating at ca. 300.degree. C. (35 mW input power) respond linearly, in terms of the change in supply current required to maintain constant resistance (temperature), to H.sub.2 concentrations between 100 ppm and 1% in an 80/20 N.sub.2 /O.sub.2 mixture. Other catalytic materials can also be used.

Ricco, Antonio J. (Albuquerque, NM); Hughes, Robert C. (Cedar Crest, NM); Smith, James H. (Albuquerque, NM); Moreno, Daniel J. (Albuquerque, NM); Manginell, Ronald P. (Albuquerque, NM); Senturia, Stephen D. (Brookline, MA); Huber, Robert J. (Bountiful, UT)

1998-01-01T23:59:59.000Z

237

Calorimetric gas sensor  

DOE Patents (OSTI)

A combustible gas sensor is described that uses a resistively heated, noble metal-coated, micromachined polycrystalline Si filament to calorimetrically detect the presence and concentration of combustible gases. The filaments tested to date are 2 {micro}m thick {times} 10{micro}m wide {times} 100, 250, 500, or 1000 {micro}m-long polycrystalline Si; some are overcoated with a 0.25 {micro}m-thick protective CVD Si{sub 3}N{sub 4} layer. A thin catalytic Pt film was deposited by CVD from the precursor Pt(acac){sub 2} onto microfilaments resistively heated to approximately 500 C; Pt deposits only on the hot filament. Using a constant-resistance-mode feedback circuit, Pt-coated filaments operating at ca. 300 C (35 mW input power) respond linearly, in terms of the change in supply current required to maintain constant resistance (temperature), to H{sub 2} concentrations between 100 ppm and 1% in an 80/20 N{sub 2}/O{sub 2} mixture. Other catalytic materials can also be used. 11 figs.

Ricco, A.J.; Hughes, R.C.; Smith, J.H.; Moreno, D.J.; Manginell, R.P.; Senturia, S.D.; Huber, R.J.

1998-11-10T23:59:59.000Z

238

Fiber optic hydrogen sensor  

DOE Patents (OSTI)

Apparatus and method for detecting a chemical substance by exposing an optic fiber having a core and a cladding to the chemical substance so that the chemical substance can be adsorbed onto the surface of the cladding. The optic fiber is coiled inside a container having a pair of valves for controlling the entrance and exit of the substance. Light from a light source is received by one end of the optic fiber, preferably external to the container, and carried by the core of the fiber. Adsorbed substance changes the transmissivity of the fiber as measured by a spectrophotometer at the other end, also preferably external to the container. Hydrogen is detected by the absorption of infrared light carried by an optic fiber with a silica cladding. Since the adsorption is reversible, a sensor according to the present invention can be used repeatedly. Multiple positions in a process system can be monitored using a single container that can be connected to each location to be monitored so that a sample can be obtained for measurement, or, alternatively, containers can be placed near each position and the optic fibers carrying the partially-absorbed light can be multiplexed for rapid sequential reading, by a single spectrophotometer.

Buchanan, B.R.; Prather, W.S.

1991-01-01T23:59:59.000Z

239

Beam current sensor  

DOE Patents (OSTI)

A current sensor for measuring the DC component of a beam of charged particles employs a superconducting pick-up loop probe, with twisted superconducting leads in combination with a Superconducting Quantum Interference Device (SQUID) detector. The pick-up probe is in the form of a single-turn loop, or a cylindrical toroid, through which the beam is directed and within which a first magnetic flux is excluded by the Meisner effect. The SQUID detector acts as a flux-to-voltage converter in providing a current to the pick-up loop so as to establish a second magnetic flux within the electrode which nulls out the first magnetic flux. A feedback voltage within the SQUID detector represents the beam current of the particles which transit the pick-up loop. Meisner effect currents prevent changes in the magnetic field within the toroidal pick-up loop and produce a current signal independent of the beam's cross-section and its position within the toroid, while the combination of superconducting elements provides current measurement sensitivites in the nano-ampere range.

Kuchnir, Moyses (Elmhurst, IL); Mills, Frederick E. (Elburn, IL)

1987-01-01T23:59:59.000Z

240

High Energy Laser Diagnostic Sensors  

Science Conference Proceedings (OSTI)

Recent advancements in high energy laser (HEL) sources have outpaced diagnostic tools capable of accurately quantifying system performance. Diagnostic tools are needed that allow system developers to measure the parameters that define HEL effectiveness. The two critical parameters for quantifying HEL effectiveness are the irradiance on target and resultant rise in target temperature. Off-board sensing has its limitations, including unpredictable changes in the reflectivity of the target, smoke and outgassing, and atmospheric distortion. On-board sensors overcome the limitations of off-board techniques but must survive high irradiance levels and extreme temperatures.We have developed sensors for on-target diagnostics of high energy laser beams and for the measurement of the thermal response of the target. The conformal sensors consist of an array of quantum dot photodetectors and resistive temperature detectors. The sensor arrays are lithographically fabricated on flexible substrates and can be attached to a variety of laser targets. We have developed a nanoparticle adhesive process that provides good thermal contact with the target and that ensures the sensor remains attached to the target for as long as the target survives. We have calibrated the temperature and irradiance sensors and demonstrated them in a HEL environment.

Luke, James R.; Goddard, Douglas N.; Thomas, David [AEgis Technologies Group, 10501 Research Rd SE, Suite D, Albuquerque, NM 87123, 505-938-9221 (United States); Lewis, Jay [RTI International, Research Triangle Park, NC (United States)

2010-10-08T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Comparative Investigation for Energy Consumption of Different Chipsets Based on Scheduling for Wireless Sensor Networks  

E-Print Network (OSTI)

Rapid progress in microelectromechanical system (MEMS) and radio frequency (RF) design has enabled the development of low-power, inexpensive, and network-enabled microsensors. These sensor nodes are capable of capturing various physical information, such as temperature, pressure, motion of an object, etc as well as mapping such physical characteristics of the environment to quantitative measurements. A typical wireless sensor network (WSN) consists of hundreds to thousands of such sensor nodes linked by a wireless medium. In this paper, we present a comparative investigation of energy consumption for few commercially available chipsets such as TR1001, CC1000 and CC1010 based on different scheduling methods for two types of deployment strategies. We conducted our experiment within the OMNeT++ simulator.

Monica,; 10.5121/ijcnc.2010.2511

2010-01-01T23:59:59.000Z

242

Implementing and Evaluating a Wireless Body Sensor System for Automated Physiological Data Acquisition at Home  

E-Print Network (OSTI)

Advances in embedded devices and wireless sensor networks have resulted in new and inexpensive health care solutions. This paper describes the implementation and the evaluation of a wireless body sensor system that monitors human physiological data at home. Specifically, a waist-mounted triaxial accelerometer unit is used to record human movements. Sampled data are transmitted using an IEEE 802.15.4 wireless transceiver to a data logger unit. The wearable sensor unit is light, small, and consumes low energy, which allows for inexpensive and unobtrusive monitoring during normal daily activities at home. The acceleration measurement tests show that it is possible to classify different human motion through the acceleration reading. The 802.15.4 wireless signal quality is also tested in typical home scenarios. Measurement results show that even with interference from nearby IEEE 802.11 signals and microwave ovens, the data delivery performance is satisfactory and can be improved by selecting an appropriate channe...

Chen, Chao; 10.5121/ijcsit.2010.2303

2010-01-01T23:59:59.000Z

243

Two algorithms for motion estimation from alternate exposure images  

Science Conference Proceedings (OSTI)

Most algorithms for dense 2D motion estimation assume pairs of images that are acquired with an idealized, infinitively short exposure time. In this work we compare two approaches that use an additional, motion-blurred image of a scene to estimate highly ... Keywords: motion blur, motion estimation, total variation

Anita Sellent; Martin Eisemann; Marcus Magnor

2010-10-01T23:59:59.000Z

244

Fault-safe code motion for type-safe languages  

Science Conference Proceedings (OSTI)

Compilers for Java and other type-safe languages have historically worked to overcome overheads and constraints imposed by runtime safety checks and precise exception semantics. We instead exploit these safety properties to perform code motion optimizations ... Keywords: code motion, intermediate representations, partial redundancy elimination, safe code motion, safety dependences, scheduling, speculative code motion

Brian R. Murphy; Vijay Menon; Florian T. Schneider; Tatiana Shpeisman; Ali-Reza Adl-Tabatabai

2008-04-01T23:59:59.000Z

245

Synthesis of complex dynamic character motion from simple animations  

Science Conference Proceedings (OSTI)

In this paper we present a general method for rapid prototyping of realistic character motion. We solve for the natural motion from a simple animation provided by the animator. Our framework can be used to produce relatively complex realistic motion ... Keywords: animation, animation w/constraints, motion transformation, physically based animation, physically based modeling, spacetime constraints

C. Karen Liu; Zoran Popovi?

2002-07-01T23:59:59.000Z

246

Crustal motion in Indonesia from Global Positioning System measurements  

E-Print Network (OSTI)

Crustal motion in Indonesia from Global Positioning System measurements Y. Bock,1 L. Prawirodirdjo: crustal motion, Indonesia tectonics, GPS, current plate motions, Southeast Asia Citation: Bock, Y., L, Crustal motion in Indonesia from Global Positioning System measurements, J. Geophys. Res., 108(B8), 2367

McCaffrey, Robert

247

HIP JOINT RECONSTRUCTION AND MOTION VISUALIZATION USING MRI AND OPTICAL MOTION CAPTURE  

E-Print Network (OSTI)

high-resolution images with high bone contrast. However, they involve radiation exposure and do propose here to use optical motion capture to simulate internal motions. The ability to image contrast, multi-planar imaging capabilities, and does not use harmful ionising radiation. Moreover, MR has

Gilles, Benjamin

248

Ocean Motion International LLC | Open Energy Information  

Open Energy Info (EERE)

Ocean Motion International LLC Ocean Motion International LLC Jump to: navigation, search Name Ocean Motion International LLC Place Saulsbury, Tennessee Zip 38067 Sector Ocean Product Marine energy technology firm developing ocean/ wave powered generators. Coordinates 35.052242°, -89.083299° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.052242,"lon":-89.083299,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

249

Dust Motions Driven by MHD Turbulence  

E-Print Network (OSTI)

We discuss the relative grain motions due to MHD turbulence in interstellar medium. It has been known for decades that turbulent drag is an efficient way to induce grain relative motions. However, earlier treatments disregarded magnetic field and used Kolmogorov turbulence. Unlike hydro turbulence, MHD turbulence is anisotropic on small scales. Moreover, compressible modes are important for MHD and magnetic perturbations can directly interact with grains. We provide calculations of grain relative motion for realistic interstellar turbulence driving that is consistent with the velocity dispersions observed in diffuse gas and for realistic grain charging. We account for the turbulence cutoff arising from abmipolar drag. Our results on grain shattering are consistent with the customary accepted cutoff size. We obtain grain velocities for turbulence with parameters consistent with those in HI and dark clouds. These velocities are smaller than those in earlier papers, where MHD effects were disregarded. Finally, w...

Lazarian, A; Yan, Huirong

2002-01-01T23:59:59.000Z

250

Slow motion responses of compliant offshore structures  

E-Print Network (OSTI)

An efficient method is developed to predict slow motion responses of slender compliant offshore structures in the unidirectional irregular waves and currents. The environmental loads are computed using the modified Morison equation based on slender-body approximation. The Hybrid Wave Model, which considers the nonlinear wave-wave interactions, is used to predict wave kinematics accurately up to the second order of wave steepness. Other second-order forces due to convective acceleration, free-surface fluctuation, time-varying structural displacement and axial divergence effects are also included. An iterative-incremental Newmark-,3 scheme is employed to simulate the structural responses in the time domain. It is observed that the predicted slow-drift motions of a Joint, Industry Project Spar and a Floating Jacket Platform are in excellent agreement with the model test measurements. However, the predicted slow-drift motions using Wheeler Stretching and Linear Extrapolation wave kinematics models do not agree with the measurements well.

Cao, Peimin

1996-01-01T23:59:59.000Z

251

Fuel-motion diagnostics and cineradiography  

SciTech Connect

Nuclear and non-nuclear applications of cineradiography are reviewed, with emphasis on diagnostic instrumentation for in-pile transient-reactor safety testing of nuclear fuel motion. The primary instrument for this purpose has been the fast-neutron hodoscope, which has achieved quantitative monitoring of time, location, mass, and velocity of fuel movement under the difficult conditions associated with transient-reactor experiments. Alternative diagnostic devices that have been developed have not matched the capabilities of the hodoscope. Other applications for the fuel-motion diagnostic apparatus are also evolving, including time-integrated radiography and direct time- and space-resolved fuel-pin power monitoring. Although only two reactors are now actively equipped with high-resolution fuel-motion diagnostic systems, studies and tests have been carried out in and for many other reactors.

DeVolpi, A.

1982-09-01T23:59:59.000Z

252

Video looping of human cyclic motion  

E-Print Network (OSTI)

In this thesis, a system called Video Looping is developed to analyze human cyclic motions. Video Looping allows users to extract human cyclic motion from a given video sequence. This system analyzes similarities from a large amount of live footage to find the point of smooth transition. The final cyclic loop is created using only a few output images. Video Looping is useful not only to learn and understand human movements, but also to apply the cyclic loop to various artistic applications. To provide practical animation references, the output images are presented as photo plate sequences to visualize human cyclic motion similar to Eadweard Muybridge's image sequences. The final output images can be used to create experimental projects such as composited multiple video loops or small size of web animations. Furthermore, they can be imported into animation packages, and animators can create keyframe animations by tracing them in 3D software.

Choi, Hye Mee

2006-05-01T23:59:59.000Z

253

Information-based self-organization of sensor nodes of a sensor network  

DOE Patents (OSTI)

A sensor node detects a plurality of information-based events. The sensor node determines whether at least one other sensor node is an information neighbor of the sensor node based on at least a portion of the plurality of information-based events. The information neighbor has an overlapping field of view with the sensor node. The sensor node sends at least one communication to the at least one other sensor node that is an information neighbor of the sensor node in response to at least one information-based event of the plurality of information-based events.

Ko, Teresa H. (Castro Valley, CA); Berry, Nina M. (Tracy, CA)

2011-09-20T23:59:59.000Z

254

Tracking-history-based Sleeping Policies for Wireless Sensor Networks.  

E-Print Network (OSTI)

??A wireless sensor network can be used to track an object. Every sensor has limited energy and detecting range. In order to conserve energy, sensors… (more)

Gau, Ding-hau

2009-01-01T23:59:59.000Z

255

MAC and Routing Protocols for Mobile Underwater Acoustic Sensor Swarms  

E-Print Network (OSTI)

Pressure Routing for Underwater Sensor Networks . . . . . .of Aloha Protocols for Underwater Acoustic Sensor Networks.Critical Applications in Underwater Sensor Networks. In

Noh, Young Tae

2012-01-01T23:59:59.000Z

256

Methods for predicting rubble motion during blasting  

SciTech Connect

Recent applications of explosives and blasting agents to rubble rock have led to requirements for more elaborate design and analysis methods. In most blasting uses, it is necessary not only to fracture the rock, but also to move the broken rubble in a predictable manner. Many in situ extraction techniques require rubblization to take place in a confined region where rock motion is a predominate factor in creating a permeable broken bed. In this paper, two analytical methods are presented which describe the large rubble motion during blasting. These methods provide the blast designer with a tool for evaluation and further refinement of blasting patterns and timing sequences.

Schamaun, J.T.

1984-01-01T23:59:59.000Z

257

Motion of extended charges in classical electrodynamics  

SciTech Connect

The Lorentz--Dirac theory of radiation reaction on the motion of point charges is beset by the well known problems of runaway solutions and preacceleration. We examine the classical theory of extended charged particles and obtain a differential-difference type equation of motion. Analysis of this equation reveals that the theory is internally consistent (i.e., no runaways or acausality) whenever the size of the particle exceeds the classical radius (defined as the radius for which the electrostatic self-energy equals the mass of the particle). A specific example is presented which explicitly shows the different character of the extended and point charge solutions. (AIP)

Levine, H.; Moniz, E.J.; Sharp, D.H.

1977-01-01T23:59:59.000Z

258

Range gated strip proximity sensor  

DOE Patents (OSTI)

A range gated strip proximity sensor uses one set of sensor electronics and a distributed antenna or strip which extends along the perimeter to be sensed. A micro-power RF transmitter is coupled to the first end of the strip and transmits a sequence of RF pulses on the strip to produce a sensor field along the strip. A receiver is coupled to the second end of the strip, and generates a field reference signal in response to the sequence of pulse on the line combined with received electromagnetic energy from reflections in the field. The sensor signals comprise pulses of radio frequency signals having a duration of less than 10 nanoseconds, and a pulse repetition rate on the order of 1 to 10 MegaHertz or less. The duration of the radio frequency pulses is adjusted to control the range of the sensor. An RF detector feeds a filter capacitor in response to received pulses on the strip line to produce a field reference signal representing the average amplitude of the received pulses. When a received pulse is mixed with a received echo, the mixing causes a fluctuation in the amplitude of the field reference signal, providing a range-limited Doppler type signature of a field disturbance. 6 figs.

McEwan, T.E.

1996-12-03T23:59:59.000Z

259

Range gated strip proximity sensor  

DOE Patents (OSTI)

A range gated strip proximity sensor uses one set of sensor electronics and a distributed antenna or strip which extends along the perimeter to be sensed. A micro-power RF transmitter is coupled to the first end of the strip and transmits a sequence of RF pulses on the strip to produce a sensor field along the strip. A receiver is coupled to the second end of the strip, and generates a field reference signal in response to the sequence of pulse on the line combined with received electromagnetic energy from reflections in the field. The sensor signals comprise pulses of radio frequency signals having a duration of less than 10 nanoseconds, and a pulse repetition rate on the order of 1 to 10 MegaHertz or less. The duration of the radio frequency pulses is adjusted to control the range of the sensor. An RF detector feeds a filter capacitor in response to received pulses on the strip line to produce a field reference signal representing the average amplitude of the received pulses. When a received pulse is mixed with a received echo, the mixing causes a fluctuation in the amplitude of the field reference signal, providing a range-limited Doppler type signature of a field disturbance.

McEwan, Thomas E. (Livermore, CA)

1996-01-01T23:59:59.000Z

260

The feasibility of head motion tracking in helical CT: A step toward motion correction  

Science Conference Proceedings (OSTI)

Purpose: To establish a practical and accurate motion tracking method for the development of rigid motion correction methods in helical x-ray computed tomography (CT). Methods: A commercially available optical motion tracking system provided 6 degrees of freedom pose measurements at 60 Hz. A 4 Multiplication-Sign 4 calibration matrix was determined to convert raw pose data acquired in tracker coordinates to a fixed CT coordinate system with origin at the isocenter of the scanner. Two calibration methods, absolute orientation (AO), and a new method based on image registration (IR), were compared by means of landmark analysis and correlation coefficient in phantom images coregistered using the derived motion transformations. Results: Transformations calculated using the IR-derived calibration matrix were found to be more accurate, with positional errors less than 0.5 mm (mean RMS), and highly correlated image voxel intensities. The AO-derived calibration matrix yielded larger mean RMS positional errors ( Asymptotically-Equal-To 1.0 mm), and poorer correlation coefficients. Conclusions: The authors have demonstrated the feasibility of accurate motion tracking for retrospective motion correction in helical CT. Their new IR-based calibration method based on image registration and function minimization was simpler to perform and delivered more accurate calibration matrices. This technique is a useful tool for future work on rigid motion correction in helical CT and potentially also other imaging modalities.

Kim, Jung-Ha [Medical Radiation Sciences, University of Sydney, NSW 2141 (Australia); Nuyts, Johan [Department of Nuclear Medicine, Katholieke Universiteit, Leuven, Belgium and Medical Imaging Research Center, Katholieke Universiteit, Leuven (Belgium); Kuncic, Zdenka [School of Physics, University of Sydney, NSW 2006 (Australia); Fulton, Roger [Medical Radiation Sciences, University of Sydney, NSW 2141 (Australia); School of Physics, University of Sydney, NSW 2006 (Australia); Department of Medical Physics, Westmead Hospital, Westmead, NSW 2145 (Australia)

2013-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Motional Spin Relaxation in Large Electric Fields  

E-Print Network (OSTI)

We discuss the precession of spin-polarized Ultra Cold Neutrons (UCN) and $^{3}$He atoms in uniform and static magnetic and electric fields and calculate the spin relaxation effects from motional $v\\times E$ magnetic fields. Particle motion in an electric field creates a motional $v\\times E$ magnetic field, which when combined with collisions, produces variations of the total magnetic field and results in spin relaxation of neutron and $^{3}$He samples. The spin relaxation times $T_{1}$ (longitudinal) and $T_{2}$ (transverse) of spin-polarized UCN and $^{3}$He atoms are important considerations in a new search for the neutron Electric Dipole Moment at the SNS \\emph{nEDM} experiment. We use a Monte Carlo approach to simulate the relaxation of spins due to the motional $v\\times E$ field for UCN and for $^{3}$He atoms at temperatures below $600,\\mathrm{mK}$. We find the relaxation times for the neutron due to the $v\\times E$ effect to be long compared to the neutron lifetime, while the $^{3}$He relaxation times may be important for the \\emph{nEDM} experiment.

Riccardo Schmid; B. Plaster; B. W. Filippone

2008-05-16T23:59:59.000Z

262

Visualizing Motion in Potential Wells* Pratibha Jolly  

E-Print Network (OSTI)

1 Visualizing Motion in Potential Wells* Pratibha Jolly Department of Physics, University of Delhi well potential diagrams using either the velocity data and assuming conservation of energy or the force wells on the one hand and establishing the relationship between the operative forces and the potential

Zollman, Dean

263

Smooth movers: perceptually guided human motion simulation  

Science Conference Proceedings (OSTI)

To animate a character, a number of poses are displayed in quick succession in order to create the illusion of motion. For most real-time applications, such as games, the pose update rate is largely constrained by the available hardware and overall simulation ...

Rachel McDonnell; Fiona Newell; Carol O'Sullivan

2007-08-01T23:59:59.000Z

264

Computer animation of Phanerozoic plate motions  

SciTech Connect

Since 1985, the PALEOMAP Project, in collaboration with research groups both in the US and abroad, has assembled a digital model that describes global plate motions during the last 600 million years. In this paper the authors present a series of computer animations that dynamically illustrates the movement of continents and terranes, and the evolution of the ocean basins since the breakup of the late Precambrian supercontinent. These animations depict the motion of the plates from both equatorial and polar perspectives. Mesozoic and Cenozoic plate tectonic reconstructions are based on a synthesis of linear magnetic anomalies, fracture zone locations, intracontinental rifts, collision and thrust belts, and zones of strike-slip. Paleozoic plate reconstructions, though more speculative, are based on evidence of past subduction, continental collision, and inferred sea floor spreading. The relative longitudinal positions of the continents during the Paleozoic and the width of intervening oceans have been adjusted to best explain changing biogeographic and paleoclimatic patterns. A new paleomagnetic/hot spot reference frame has been constructed that combines paleomagnetic data compiled by Rob Van der Voo (1992) with inferred motion relative to a fixed frame of hot spots. Using probable Early Mesozoic and Paleozoic hot spot tracks on the major continents, the authors have extended plate motions relative to the hot spot reference frame back to 400 million years.

Scotese, C.R. (Univ. of Texas, Arlington, TX (United States). Dept. of Geology)

1992-01-01T23:59:59.000Z

265

A geometric approach to collective motion  

Science Conference Proceedings (OSTI)

We introduce the total s-energy of a multiagent system and bound its maximum asymptotic value. This gives us a new analytical device to study the convergence rate of bidirectional agreement dynamics. We use it to bound the convergence rate of ... Keywords: agreement dynamics, collective motion, total s-energy

Bernard Chazelle

2010-06-01T23:59:59.000Z

266

Strong motion duration and earthquake magnitude relationships  

Science Conference Proceedings (OSTI)

Earthquake duration is the total time of ground shaking from the arrival of seismic waves until the return to ambient conditions. Much of this time is at relatively low shaking levels which have little effect on seismic structural response and on earthquake damage potential. As a result, a parameter termed ``strong motion duration`` has been defined by a number of investigators to be used for the purpose of evaluating seismic response and assessing the potential for structural damage due to earthquakes. This report presents methods for determining strong motion duration and a time history envelope function appropriate for various evaluation purposes, for earthquake magnitude and distance, and for site soil properties. There are numerous definitions of strong motion duration. For most of these definitions, empirical studies have been completed which relate duration to earthquake magnitude and distance and to site soil properties. Each of these definitions recognizes that only the portion of an earthquake record which has sufficiently high acceleration amplitude, energy content, or some other parameters significantly affects seismic response. Studies have been performed which indicate that the portion of an earthquake record in which the power (average rate of energy input) is maximum correlates most closely with potential damage to stiff nuclear power plant structures. Hence, this report will concentrate on energy based strong motion duration definitions.

Salmon, M.W.; Short, S.A. [EQE International, Inc., San Francisco, CA (United States); Kennedy, R.P. [RPK Structural Mechanics Consulting, Yorba Linda, CA (United States)

1992-06-01T23:59:59.000Z

267

Realtime motion segmentation based multibody visual SLAM  

Science Conference Proceedings (OSTI)

In this paper, we present a practical vision based Simultaneous Localization and Mapping (SLAM) system for a highly dynamic environment. We adopt a multibody Structure from Motion (SfM) approach, which is the generalization of classical SfM to dynamic ...

Abhijit Kundu; K. Madhava Krishna; C. V. Jawahar

2010-12-01T23:59:59.000Z

268

The effects of the topographic bench on ground motion from mining explosions  

Science Conference Proceedings (OSTI)

Understanding the effects of the bench on ground motion can improve the design of cast blasts and achieve improved blast efficiency while remaining below vibration requirements. A new dataset recorded in September 2003 from a coal mine in Arizona has allowed us to examine the excitation of short-period Rayleigh-type surface waves from four simultaneously-detonated explosions in and below a topographic bench of a mine. The explosions were recorded on a network of over 150 seismic sensors, providing an extensive understanding of the ground motion radiation patterns from these explosions. We detonated two separate explosions in the deepest pit of the mine, thus the explosions were shot to solid rock. Within 25 meters of these two explosions, we detonated two additional explosions of similar explosive yields in a bench, thus these explosions were shot to the free face. Radiation patterns and spectral ratios from the explosions show increased amplitudes at azimuths behind the bench relative to the amplitudes in front of the bench. We compared these findings to seismic observations from two {approximately} 1.5 million pound cast blasts at the same mine and found similar radiations patterns. Modeling of these blasts shows that the variations in ground motion are caused by the topographic bench as a result of 1) horizontal spalling of the rock falling into the pit and 2) non-linear scattering near the free-face. Shooting to a buffer also causes the azimuthal variations to be significantly reduced.

Bonner, J.L.; Blomberg, W.S.; Hopper, H.; Leidig, M. [Weston Geophysical Corporation (United States)

2005-07-01T23:59:59.000Z

269

NETL: Advanced Research - Sensors & Controls Innovations  

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

Sensors & Controls Sensors & Controls Advanced Research Sensors & Controls Innovations OSU's O2 Sensor Ohio State University's reference-free potentiometric oxygen sensor capable of withstanding temperatures of 800 °C. Novel Sensors and Advanced Process Control Novel Sensors and Advanced Process Control are key enabling technologies for advanced near zero emission power systems. NETL's Advanced Research Program is leading the effort to develop sensing and control technologies and methods to achieve seamless, integrated, automated, optimized, and intelligent power systems. Today, the performance of advanced power systems is limited by the lack of sensors and controls capable of withstanding high temperature and pressure conditions. Harsh environments are inherent to new systems that aim to

270

System architecture directions for networked sensors  

Science Conference Proceedings (OSTI)

Technological progress in integrated, low-power, CMOS communication devices and sensors makes a rich design space of networked sensors viable. They can be deeply embedded in the physical world and spread throughout our environment like smart dust. The ...

Jason Hill; Robert Szewczyk; Alec Woo; Seth Hollar; David Culler; Kristofer Pister

2000-12-01T23:59:59.000Z

271

On target tracking with binary proximity sensors  

Science Conference Proceedings (OSTI)

We consider the use of binary proximity sensors for tracking targets. Such sensors provide only 1-bit information regarding a target's presence or absence in their vicinity, albeit with less than 100% reliability. A novel tracking method employing such ...

Wooyoung Kim; Kirill Mechitov; Jeung-Yoon Choi; Soo Ham

2005-04-01T23:59:59.000Z

272

Calibrating Cylindrical Hot-Film Anemometer Sensors  

Science Conference Proceedings (OSTI)

We report the results of 82 separate calibrations of cylindrical, platinum hot-film anemometer sensors in air. The calibrations for each sensor involved a determination of its temperature-resistance characteristics, a study of its heat transfer ...

Edgar L. Andreas; Brett Murphy

1986-06-01T23:59:59.000Z

273

Design of wireless sensors for automobiles  

Science Conference Proceedings (OSTI)

Automobile manufacturers require sense data to analyse and improve the driving experience. Currently, sensors are physically wired to both data collectors and the car battery, thus the number of wires scale linearly with sensors. We design alternative ...

Olga L. Diaz–Gutierrez; Richard Hall

2005-12-01T23:59:59.000Z

274

Cantilever Sensors: Nanomechanical Tools for Diagnostics  

E-Print Network (OSTI)

Cantilever sensors have attracted considerable attention over the last decade because of their potential as a highly sensitive sensor platform for high throughput and multiplexed detection of proteins and nucleic acids. A ...

Datar, Ram

275

Intrusion Detection: Characterising intrusion detection sensors  

Science Conference Proceedings (OSTI)

An intrusion detection sensor is defined as a device that collects and analyses network traffic for the purpose of identifying suspicious events. Too often the value of a sensor is associated with its data collection and analysis features. Experience ...

Siraj A. Shaikh; Howard Chivers; Philip Nobles; John A. Clark; Hao Chen

2008-09-01T23:59:59.000Z

276

Harsh Environment Silicon Carbide Sensor Technology Geothermal...  

Open Energy Info (EERE)

and mechanical robustness of SiC sensors at temperatures as high as 600oC and in dry steam. State California Objectives In the proposed work, two types of physical sensors...

277

Underwater Sensor Networks: Applications, Advances, and Challenges  

E-Print Network (OSTI)

Underwater Sensor Networks: Applications, Advances, and Challenges By John Heidemann1 , Milica- mentation of underwater wireless sensor networks. We summarize key applications and the main phenomena hardware, testbeds, and simulation tools available to the research community. Keywords: underwater

Heidemann, John

278

Decentralized, adaptive resource allocation for sensor networks  

Science Conference Proceedings (OSTI)

This paper addresses the problem of resource allocation in sensor networks. We are concerned with how to allocate limited energy, radio bandwidth, and other resources to maximize the value of each node's contribution to the network. Sensor networks present ...

Geoffrey Mainland; David C. Parkes; Matt Welsh

2005-05-01T23:59:59.000Z

279

Dynamic Rotor Deformation and Vibration Monitoring Using a Non-Incremental Laser Doppler Distance Sensor  

Science Conference Proceedings (OSTI)

Monitoring rotor deformations and vibrations dynamically is an important task for improving the safety and the lifetime as well as the energy efficiency of motors and turbo machines. However, due to the high rotor speed encountered in particular at turbo machines, this requires concurrently a high measurement rate and high accuracy, which can not be fulfilled by most commercially available sensors. To solve this problem, we developed a non-incremental laser Doppler distance sensor (LDDS), which is able to measure simultaneously the in-plane velocity and the out-of-plane position of moving rough solid objects with micrometer precision. In addition, this sensor concurrently offers a high temporal resolution in the microsecond range, because its position uncertainty is in principle independent of the object velocity in contrast to conventional distance sensors, which is a unique feature of the LDDS. Consequently, this novel sensor enables precise and dynamic in-process deformation and vibration measurements on rotating objects, such as turbo machine rotors, even at very high speed. In order to evidence the capability of the LDDS, measurements of rotor deformations (radial expansion), vibrations and wobbling motions are presented at up to 50,000 rpm rotor speed.

Pfister, Thorsten; Guenther, Philipp; Dreier, Florian; Czarske, Juergen [Technische Universitaet Dresden, Faculty of Electrical Engineering and Information Technology, Laboratory for Measurement and Testing Techniques, Helmholtzstrasse 18, D-01062 Dresden (Germany)

2010-05-28T23:59:59.000Z

280

People can understand descriptions of motion without activating visual motion brain regions  

E-Print Network (OSTI)

What is the relationship between our perceptual and linguistic neural representations of the same event? We approached this question by asking whether visual perception of motion and understanding linguistic depictions of ...

Bedny, Marina

Note: This page contains sample records for the topic "timer motion sensor" 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

Sensors and Instrumentation and Nondestructive Evaluation - Nuclear...  

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

Capabilities Sensors and Instrumentation and Nondestructive Evaluation Overview Energy System Applications Safety-Related Applications Homeland Security Applications...

282

Risk-Based Sensor Placement Methodology  

Current methods for sensor placement are based on qualitative approaches ranging from “best guess” to expensive, customized studies.

283

NIST Sensor Science Division Office Staff Directory  

Science Conference Proceedings (OSTI)

... Associates. Name, Position, Office Phone. Parr, Albert, Physicist, 301-975- 2316. ... Contact. Sensor Science Division Gerald Fraser, Division Chief. ...

2013-04-10T23:59:59.000Z

284

Millimeter Wave Group's Publications - Sensors, Detectors & Diagnostic...  

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

> Sensors & Instrumentation > MMW Group's publications DEPARTMENTS Engineering Analysis Nuclear Systems Analysis Research & Test Reactor Nonproliferation and National Security...

285

Piezoelectric Fiber Fabrication for Magnetoelectric Sensors  

Science Conference Proceedings (OSTI)

Optical Properties of Bifeo3: Polar Oxides for Fundamental Science and Solar Energy Applications · Piezoelectric Fiber Fabrication for Magnetoelectric Sensors

286

Combustible gas sensor interference test report  

DOE Green Energy (OSTI)

Result of Laboratory Interference testing of the Sierra Monitor Corporation Gas Sensor, number model 4101-2, are documented.

Webb, B.J., Westinghouse Hanford

1996-07-30T23:59:59.000Z

287

NIST, Sensor Science Division, Ultraviolet Radiation Group ...  

Science Conference Proceedings (OSTI)

... Physicist Sensor Science Division Ultraviolet Radiation Group. ... Ph.D. Optical Sciences and Engineering ... Orlando, FL MS Electrical Engineering, The ...

2013-03-21T23:59:59.000Z

288

Clustering of wireless sensor and actor networks based on sensor distribution and connectivity  

Science Conference Proceedings (OSTI)

Wireless Sensor and Actor Networks (WSANs) employ significantly more capable actor nodes that can collect data from sensors and perform application specific actions. To take these actions collaboratively at any spot in the monitored regions, maximal ... Keywords: Actor placement, Clustering, Connectivity, Energy-efficiency, Messaging overhead, Sensor distribution, Wireless sensor and actor networks

Kemal Akkaya; Fatih Senel; Brian McLaughlan

2009-06-01T23:59:59.000Z

289

Adaptive algorithms for sensor activation in renewable energy based sensor systems  

Science Conference Proceedings (OSTI)

Upcoming sensor networks would be deployed with sensing devices with energy harvesting capabilities from renewable energy sources such as solar power. A key research question in such sensor systems is to maximize the asymptotic event detection probability ... Keywords: Adaptive algorithms, Energy harvesting sensor systems, Sensor activation, Temporal correlations

Neeraj Jaggi, Sreenivas Madakasira, Sandeep Reddy Mereddy, Ravi Pendse

2013-06-01T23:59:59.000Z

290

Mobile sensor network to monitor wastewater collection pipelines  

E-Print Network (OSTI)

Advanced pipeline monitoringDesign of mobile pipeline floating sensor “SewerSnortIllustration of mobile pipeline floating sensor monitoring

Lim, Jungsoo

2012-01-01T23:59:59.000Z

291

TIP Project Brief 080011 Self Powered Wireless Sensor ...  

Science Conference Proceedings (OSTI)

... AE sensors will be complemented with active piezoelectric sensors that ... These elements include development of the energy harvesting system, the ...

2011-11-07T23:59:59.000Z

292

Spatiotemporal multicast in sensor networks  

Science Conference Proceedings (OSTI)

Sensor networks often involve the monitoring of mobile phenomena. We believe this task can be facilitated by a spatiotemporal multicast protocol which we call "mobicast". Mobicast is a novel spatiotemporal multicast protocol that distributes a message ... Keywords: mobicast, network geometry, protocols, spatiotemporal multicast, wireless ad hoc networks

Qingfeng Huang; Chenyang Lu; Gruia-Catalin Roman

2003-11-01T23:59:59.000Z

293

Note: Helical nanobelt force sensors  

Science Conference Proceedings (OSTI)

We present the fabrication and characterization of helical nanobelt force sensors. These self-sensing force sensors are based on the giant piezoresistivity of helical nanobelts. The three-dimensional helical nanobelts are self-formed from 27 nm-thick n-type InGaAs/GaAs bilayers using rolled-up techniques, and assembled onto electrodes on a micropipette using nanorobotic manipulations. The helical nanobelt force sensors can be calibrated using a calibrated atomic force microscope cantilever system under scanning electron microscope. Thanks to their giant piezoresistance coefficient (515 Multiplication-Sign 10{sup -10} Pa{sup -1}), low stiffness (0.03125 N/m), large-displacement capability ({approx}10 {mu}m), and good fatigue resistance, they are well suited to function as stand-alone, compact ({approx}20 {mu}m without the plug-in support), light ({approx}5 g including the plug-in support), versatile and large range ({approx}{mu}N) and high resolution ({approx}nN) force sensors.

Hwang, G. [Laboratory for Photonics and Nanostructures, Centre National de la Recherche Scientifique, Marcoussis 91460 (France); Hashimoto, H. [Department of EECE, Chuo University 1-13-27 Kasuga, Bunkyo-ku, Tokyo (Japan)

2012-12-15T23:59:59.000Z

294

Battery system with temperature sensors  

SciTech Connect

A battery system to monitor temperature includes at least one cell with a temperature sensing device proximate the at least one cell. The battery system also includes a flexible member that holds the temperature sensor proximate to the at least one cell.

Wood, Steven J.; Trester, Dale B.

2012-11-13T23:59:59.000Z

295

Fiber-optic pressure sensor  

DOE Patents (OSTI)

A pressure wave sensor utilizing fiber optic interferometry techniques to determine pressure in a bar. Light from a fiber optic coil around the bar is mixed with light from a reference optical fiber to produce interference fringes as a function of time. These fringes over time are related to the pressure versus time existing in the bar. 2 figs.

Dingus, R.S.

1989-03-10T23:59:59.000Z

296

Reliable and efficient reprogramming in sensor networks  

Science Conference Proceedings (OSTI)

Retasking and remote programming of sensor networks is an essential functionality to make these networks practical and effective. As the availability of more capable sensor nodes increases and new functional implementations continue to be proposed, these ... Keywords: Broadcast, energy efficiency, minimum energy broadcast, reliable distribution, reprogramming, retasking, sensor networks

Chris Miller; Christian Poellabauer

2010-08-01T23:59:59.000Z

297

Simulation models for photogate active pixel sensor  

Science Conference Proceedings (OSTI)

The constant reduction in the transistors sizes for the design and the integration of smart sensors on chip requires accurate simulations of electrical characteristics. To this end, new simulation models of photogate active pixel sensor for CMOS imagers ... Keywords: modelling and simulation, optoelectronic devices, photogate active pixel sensor

B. Casadei; C. Dufaza; L. Martin

2005-07-01T23:59:59.000Z

298

Securing network access in wireless sensor networks  

Science Conference Proceedings (OSTI)

In wireless sensor networks, it is critical to restrict the network access only to eligible sensor nodes, while messages from outsiders will not be forwarded in the networks. In this paper, we present the design, implementation, and evaluation of a secure ... Keywords: elliptic curve cryptography, security, sensor networks

Kun Sun; An Liu; Roger Xu; Peng Ning; Douglas Maughan

2009-03-01T23:59:59.000Z

299

Distributed user access control in sensor networks  

Science Conference Proceedings (OSTI)

User access control in sensor networks defines a process of granting user the access right to the information and resources. It is essential for the future real sensor network deployment in which sensors may provide users with different services in terms ...

Haodong Wang; Qun Li

2006-06-01T23:59:59.000Z

300

Zonal Rumor Routing for Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Routing algorithms for wireless sensor networks are constrained by power, memory and computational resources. Rumor Routing algorithm for sensor networks spreads theinformation of an event to other nodes in the network, thus enabling queries to discover ... Keywords: Sensor Network, Routing, Wireless, Rumor Routing

Tarun Banka; Gagan Tandon; Anura P. Jayasumana

2005-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Optical waveguide tamper sensor technology  

DOE Green Energy (OSTI)

Dielectric optical waveguides exhibit properties that are well suited to sensor applications. They have low refractive index and are transparent to a wide range of wavelengths. They can react with the surrounding environment in a variety of controllable ways. In certain sensor applications, it is advantageous to integrate the dielectric waveguide on a semiconductor substrate with active devices. In this work, we demonstrate a tamper sensor based on dielectric waveguides that connect epitaxial GaAs-GaAlAs sources and detectors. The tamper sensing function is realized by attaching particles of absorbing material with high refractive index to the surface of the waveguides. These absorbers are then attached to a lid or cover, as in an integrated circuit package or multi-chip module. The absorbers attenuate the light in the waveguides as a function of absorber interaction. In the tamper indicating mode, the absorbers are placed randomly on the waveguides, to form a unique attenuation pattern that is registered by the relative signal levels on the photodetectors. When the lid is moved, the pattern of absorbers changes, altering the photodetector signals. This dielectric waveguide arrangement is applicable to a variety of sensor functions, and specifically can be fabricated as a chemical sensor by the application of cladding layers that change their refractive index and/or optical absorption properties upon exposure to selected chemical species. An example is found in palladium claddings that are sensitive to hydrogen. A description of designs and a basic demonstration of the tamper sensing and chemical sensing functions is described herein.

Carson, R.F.; Butler, M.A.; Sinclair, M.B. [and others

1997-03-01T23:59:59.000Z

302

Sensors for Screening and Surveillance  

SciTech Connect

Much attention, in fact an entire session at this conference, is being devoted to protecting the United States against human threats--individuals who may pose a danger by their mere presence on US soil. However, tomorrow's terrorists will employ weapons in their attacks, and we must also be diligent in preventing these weapons from reaching their targets. Sensors can play an important role in detecting these weapons before they achieve their desired effects. A sensor system can best be understood as a way of automating search techniques that would normally be carried out by a human's touch and vision senses, or by a dog's sniffing capabilities. The list of potential threats is long, including nuclear, biological, chemical and radiological weapons, and each presents its own challenges. However, any effective system must meet the following requirements: (1) Sensor systems must be operationally practical. Delays must be kept to a minimum. The systems must be safe to operate. Individual privacy and corporate proprietary information must be protected. The systems must be part of a viable concept of operations; i.e., they must provide information that can enable effective, preemptive actions to be taken. (2) Sensors systems must be highly sensitive, providing a low probability of missed detections (false negatives). Our adversaries will conceal their device from detection, and they will likely probe our defenses for any weaknesses. Our systems must be robust against these techniques. (3) Sensor systems must give a low probability of false alarms (false positives). Our response to the detection of such a weapon will marshal substantial resources and, in many scenarios, be highly disruptive to the general population. Thus a system that gives frequent false alarms will soon be ignored.

Dye, D.H.

2002-03-05T23:59:59.000Z

303

A survey on wireless sensor network infrastructure for agriculture  

Science Conference Proceedings (OSTI)

The hybrid wireless sensor network is a promising application of wireless sensor networking techniques. The main difference between a hybrid WSN and a terrestrial wireless sensor network is the wireless underground sensor network, which communicates ... Keywords: Agriculture, Hybrid wireless sensor network, Information collection, Monitoring, Wireless underground sensor network

Xiaoqing Yu; Pute Wu; Wenting Han; Zenglin Zhang

2013-01-01T23:59:59.000Z

304

A Delaunay Triangulation based method for wireless sensor network deployment  

Science Conference Proceedings (OSTI)

To obtain a satisfied performance of wireless sensor network, an adaptable sensor deployment method for various applications is essential. In this paper, we propose a centralized and deterministic sensor deployment method, DT-Score (Delaunay Triangulation-Score), ... Keywords: Delaunay Triangulation, Obstacles, Sensor coverage, Sensor deployment, Wireless sensor network

Chun-Hsien Wu; Kuo-Chuan Lee; Yeh-Ching Chung

2007-10-01T23:59:59.000Z

305

Long-range video motion estimation using point trajectories  

E-Print Network (OSTI)

This thesis describes a new approach to video motion estimation, in which motion is represented using a set of particles. Each particle is an image point sample with a long-duration trajectory and other properties. To ...

Sand, Peter (Peter M.), 1977-

2006-01-01T23:59:59.000Z

306

Robust hybrid control for autonomous vehicle motion planning  

E-Print Network (OSTI)

This dissertation focuses on the problem of motion planning for agile autonomous vehicles. In realistic situations, the motion planning problem must be solved in real-time, in a dynamic and uncertain environment. The ...

Frazzoli, Emilio, 1970-

2001-01-01T23:59:59.000Z

307

Nonlinear Motion of a Shallow Water Barotropic Vortex  

Science Conference Proceedings (OSTI)

Nonlinear motions of a shallow water barotropic vortex on a ? plane differ substantially from the analogous linear motions. The nonlinear model described here, in which wavenumber 1–3 asymmetries interact with each other and the mean vortex, ...

H. E. Willoughby

1994-12-01T23:59:59.000Z

308

Evaluation of Vertical Motion: Past, Present, and Future  

Science Conference Proceedings (OSTI)

The potential impact of gridded output from numerical models on operational forecasting of vertical motion is examined. A review of historical techniques for operational vertical motion evaluation is presented. An attempt is made to relate ...

Lawrence B. Dunn

1991-03-01T23:59:59.000Z

309

Mean Vertical Motions Seen by Radar Wind Profilers  

Science Conference Proceedings (OSTI)

Radar wind profilers have been used to measure directly the vertical motion above the radar site. Mean values of vertical motions in the troposphere and lower stratosphere reported at sites in and near mountains are often several centimeters per ...

G. D. Nastrom; T. E. VanZandt

1994-08-01T23:59:59.000Z

310

Editing dynamic human motions via momentum and force  

Science Conference Proceedings (OSTI)

We present an integrated framework for interactive editing of the momentum and external forces in a motion capture sequence. Allowing user control of the momentum and forces provides a powerful and intuitive editing tool for dynamic motions. To make ...

Kwang Won Sok; Katsu Yamane; Jehee Lee; Jessica Hodgins

2010-07-01T23:59:59.000Z

311

Tropical Cyclone Motion: Environmental Interaction Plus a Beta Effect  

Science Conference Proceedings (OSTI)

The dynamics of tropical cyclone motion are investigated by solving for instantaneous motion tendencies using the divergent barotropic vorticity equation on a beta plane. Two methods of solution are presented a direct analytic solution for a ...

Greg J. Holland

1983-02-01T23:59:59.000Z

312

Deduction of Vertical Motion in the Atmosphere from Aircraft Measurements  

Science Conference Proceedings (OSTI)

Equations for deducing the vertical motion of air based on aircraft measurements are presented along with derivations. The equations are based on the aircraft equations of motion, but due to different assumptions, the resulting equations are ...

Fred J. Kopp

1985-12-01T23:59:59.000Z

313

Motion to intervene and comments of the energy services group...  

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

Motion to intervene and comments of the energy services group of Hydro-Quebec and H.Q. Energy Services (U.S.) Inc, on FE 99-1 Motion to intervene and comments of the energy...

314

Ground motion data for International Collider models  

SciTech Connect

The proposed location for the International Linear Collider (ILC) in the Americas region is Fermilab in Batavia Illinois. If built at this location the tunnels would be located in the Galena Platteville shale at a depth of 100 or more meters below the surface. Studies using hydro static water levels and seismometers have been conducted in the MINOS hall and the LaFrange Mine in North Aurora Illinois to determine the level of ground motion. Both these locations are in the Galena Platteville shale and indicate the typical ground motion to be expected for the ILC. The data contains both natural and cultural noise. Coefficients for the ALT law are determined. Seismic measurements at the surface and 100 meters below the surface are presented.

Volk, J.T.; LeBrun, P.; Shiltsev, V.; Singatulin, S.; /Fermilab

2007-11-01T23:59:59.000Z

315

Human Motion Analysis Based on Organic Computing Principles  

E-Print Network (OSTI)

mrkers or expensive sensorsD rendering fwg solutions lerly superior to wg devies with respet to eonomy nd

Würtz, Rolf P.

316

Sensors & Measurement | More Science | ORNL  

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

Sensors and Measurements Sensors and Measurements SHARE Sensors and Measurement Oak Ridge National Laboratory's (ORNL) capability in the research and development of sensor materials, sensors technologies, new instrumentation, and measurement systems is critical to its ability to translate breakthrough science into robust technologies, systems, and methods that address high-risk, high-complexity, multidisciplinary issues of national importance. This capability is manifested in a culture that effectively creates and manages complex systems by (1) developing detailed analytical processes to establish requirements, (2) analyzing candidate system architectures, (3) engineering in critical performance attributes, and (4) delivering measurement systems that operate as expected from the outset and

317

Wide Area and Distributed Hydrogen Sensors  

DOE Green Energy (OSTI)

Recent advances in optical sensors show promise for the development of new wide area monitoring and distributed optical network hydrogen detection systems. Optical hydrogen sensing technologies reviewed here are: 1) open path Raman scattering systems, 2) back scattering from chemically treated solid polymer matrix optical fiber sensor cladding; and 3) shlieren and shearing interferometry imaging. Ultrasonic sensors for hydrogen release detection are also reviewed. The development status of these technologies and their demonstrated results in sensor path length, low hydrogen concentration detection ability, and response times are described and compared to the corresponding status of hydrogen spot sensor network technologies.

Zalosh, Robert G.; Barilo, Nick F.

2009-09-18T23:59:59.000Z

318

Noncommutative geometry inspired wormholes with conformal motion  

E-Print Network (OSTI)

This paper discusses a new wormhole solution that admits conformal motion, given a noncommutative-geometry background. After a discussion of the wormhole geometry and the energy conditions, the analysis proceeds with the calculation of the active gravitational mass, a discussion of the TOV equation describing the equilibrium conditions, as well as the nature of the total gravitational energy. The wormhole spacetime is not asymptotically flat and is therefore cut off at some radial distance and joined to an exterior vacuum solution.

Farook Rahaman; Saibal Ray; G. S. Khadekar; P. K. F. Kuhfittig; Indrani Karar

2013-05-17T23:59:59.000Z

319

Compression of ground-motion data  

Science Conference Proceedings (OSTI)

Ground motion data has been recorded for many years at Nevada Test Site and is now stored on thousands of digital tapes. The recording format is very inefficient in terms of space on tape. This report outlines a method to compress the data onto a few hundred tapes while maintaining the accuracy of the recording and allowing restoration of any file to the original format for future use. For future digitizing a more efficient format is described and suggested.

Long, J.W.

1981-04-01T23:59:59.000Z

320

Dust Motions Driven by MHD Turbulence  

E-Print Network (OSTI)

We discuss the relative grain motions due to MHD turbulence in interstellar medium. It has been known for decades that turbulent drag is an efficient way to induce grain relative motions. However, earlier treatments disregarded magnetic field and used Kolmogorov turbulence. Unlike hydro turbulence, MHD turbulence is anisotropic on small scales. Moreover, compressible modes are important for MHD and magnetic perturbations can directly interact with grains. We provide calculations of grain relative motion for realistic interstellar turbulence driving that is consistent with the velocity dispersions observed in diffuse gas and for realistic grain charging. We account for the turbulence cutoff arising from abmipolar drag. Our results on grain shattering are consistent with the customary accepted cutoff size. We obtain grain velocities for turbulence with parameters consistent with those in HI and dark clouds. These velocities are smaller than those in earlier papers, where MHD effects were disregarded. Finally, we consider grain velocities arising from photoelectric emission, radiation pressure and the thrust due to molecular hydrogen formation. These are lower than relative velocities induced by turbulence. We conclude that turbulence should prevent these mechanisms from segregating grains by size.

A. Lazarian; Huirong Yan

2002-05-17T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Universal equations and constants of turbulent motion  

E-Print Network (OSTI)

This paper presents a parameter-free theory of shear-generated turbulence at asymptotically high Reynolds numbers in incompressible fluids. It is based on a two-fluids concept. Both components are materially identical and inviscid. The first component is an ensemble of quasi-rigid dipole-vortex tubes as quasi-particles in chaotic motion. The second is a superfluid performing evasive motions between the tubes. The local dipole motions follow Helmholtz' law. The vortex radii scale with the energy-containing length scale. Collisions between quasi-particles lead either to annihilation (likewise rotation, turbulent dissipation) or to scattering (counterrotation, turbulent diffusion). There are analogies with birth and death processes of population dynamics and their master equations. For free homogeneous decay the theory predicts the TKE to follow 1/t. With an adiabatic condition at the wall it predicts the logarithmic law with von Karman's constant as 1/\\sqrt{2 pi} = 0.399. Likewise rotating couples form dissipative patches almost at rest ($\\rightarrow$ intermittency) wherein the spectrum evolves like an "Apollonian gear" as discussed first by Herrmann, 1990. On this basis the prefactor of the 3D-wavenumber spectrum is predicted as (1/3)(4 pi)^{2/3}=1.8; in the Lagrangian frequency spectrum it is simply 2. The results are situated well within the scatter range of observational, experimental and DNS results.

Helmut Z. Baumert

2012-03-22T23:59:59.000Z

322

Active learning for real-time motion controllers  

Science Conference Proceedings (OSTI)

This paper describes an approach to building real-time highly-controllable characters. A kinematic character controller is built on-the-fly during a capture session, and updated after each new motion clip is acquired. Active learning is used to identify ... Keywords: active learning, human motion, motion capture

Seth Cooper; Aaron Hertzmann; Zoran Popovi?

2007-08-01T23:59:59.000Z

323

Sharing motion information with close family and friends  

Science Conference Proceedings (OSTI)

We present the Motion Presence application, an augmented phone book style application that allows close friends and family to view each other's current motion status ("moving" or "not moving") on their mobile phones. We performed a two week long field ... Keywords: awareness, mobile presence, motion detection, privacy

Frank R. Bentley; Crysta J. Metcalf

2007-04-01T23:59:59.000Z

324

Measurement of sinusoidal vibration from motion blurred images  

Science Conference Proceedings (OSTI)

Previous vision-based methods usually measure vibration from large sequence of unblurred images recorded by high-speed video or stroboscopic photography. In this paper, we propose a novel method for sinusoidal vibration measurement based on motion blurred ... Keywords: Geometric moment, Motion blur, Motion blurred image, Vibration measurement

Shigang Wang; Baiqing Guan; Guobao Wang; Qian Li

2007-07-01T23:59:59.000Z

325

Energy Systems Sensor Laboratory (Fact Sheet)  

DOE Green Energy (OSTI)

This fact sheet describes the purpose, lab specifications, applications scenarios, and information on how to partner with NREL's Energy Systems Sensor Laboratory at the Energy Systems Integration Facility. The mission of the Energy Systems Sensor Laboratory at NREL's Energy Systems Integration Facility (ESIF) is to research, develop, test, and evaluate the performance of commercial and developing hydrogen sensor technologies to support the needs of the emerging hydrogen infrastructure. Sensor performance metrics analogous to national and international standards are quantified. Information gained from the sensor testing is provided to the sensor manufacturers to aid in sensor development, to end users to guide sensor selection and deployment, and to committees to support the development of codes and standards. The laboratory also provides support to end-users, including assessment of technologies for applications, information on deployment. Some application scenarios are: (1) Testing and analyzing sensors are over a range of controlled and monitored environmental conditions; (2) Testing the impact of interferants and poisons; (3) Evaluating the life span of sensors with separate dedicated life test fixtures; and (4) Testing of hydrogen sensors for process applications, including responses under high hydrogen concentrations.

Not Available

2011-10-01T23:59:59.000Z

326

Enabling Energy-Efficient Approaches to Thermal Comfort Using Room Air Motion  

E-Print Network (OSTI)

Energy Efficiency, Thermal Comfort with Air MotionEnergy Efficiency, Thermal Comfort with Air Motion No-fan 2Energy Efficiency, Thermal Comfort with Air Motion

Pasut, Wilmer; Arens, Edward; Zhang, Hui; Kaam, Soazig; Zhai, Yongchao

2013-01-01T23:59:59.000Z

327

Buried fiber optic intrusion sensor  

E-Print Network (OSTI)

A distributed fiber optic intrusion sensor capable of detecting intruders from the pressure of their weight on the earth's surface was investigated in the laboratory and in field tests. The presence of an intruder above or in proximity to the buried sensor induces a phase shift in light propagating along the fiber which allows for the detection and localization of intrusions. Through the use of an ultra-stable erbium-doped fiber laser and phase sensitive optical time domain reflectometry, disturbances were monitored in long (several km) lengths of optical fiber. Narrow linewidth and low frequency drift in the laser were achieved through a combination of optical feedback and insulation of the laser cavity against environmental effects. The frequency drift of the laser, characterized using an all-fiber Mach Zehnder interferometer, was found to be less than 1 MHz/min, as required for operation of the intrusion detection system. Intrusions were simulated in a laboratory setting using a piezoelectric transducer to produce a controllable optical phase shift at the 2 km point of a 12 km path length. Interrogation of the distributed sensor was accomplished by repetitively gating light pulses from the stable laser into the sensing fiber. By monitoring the Rayleigh backscattered light with a photodetector and comparing traces with and without an induced phase shift, the phase disturbances were detected and located. Once the feasibility of such a sensor was proven in the laboratory, the experimental set up was transferred to Texas A&M's Riverside Campus. At the test site, approximately 40 meters of fiber optic cable were buried in a triangle perimeter and then spliced into the 12 km path length which was housed inside the test facility. Field tests were conducted producing results comparable to those found in the laboratory. Intrusions over this buried fiber were detectable on the ?-OTDR trace and could be localized to the intrusion point. This type of sensor has the potential benefits of heightened sensitivity, covertness, and greatly reduced cost over the conventional seismic, acoustic, infrared, magnetic, and fiber optic sensors for monitoring long (multi-km) perimeters.

Maier, Eric William

2005-05-01T23:59:59.000Z

328

A Laser Interferometric Miniature Sensor  

SciTech Connect

This is the second year of a Phase II Small Business Innovation Research (SBIR) contract geared towards the development of a new seismic sensor. Ground-based seismic monitoring systems have proven to be very capable in identifying nuclear tests, and can provide somewhat precise information on the location and yield of the explosive device. Making these measurements, however, currently requires very expensive and bulky seismometers that are difficult to deploy in places where they are most needed. A high performance, compact device can enable rapid deployment of large scale arrays, which can in turn be used to provide higher quality data during times of critical need. The use of a laser interferometer-based device has shown considerable promise, while also presenting significant challenges. The greatest strength of this optical readout technique is the ability to decouple the mechanical design from the transducer, thus enabling a miniaturized design that is not accessible with conventional sensing techniques. However, the nonlinearity in the optical response must be accounted for in the sensor output. Previously, we had proposed using a force-feedback approach to position the sensor at a point of maximum linearity. However, it can be shown that the combined nonlinearities of the optical response and the force-feedback curve necessarily results in a significant amount of unwanted noise at low frequencies. Having realized this, we have developed a new approach that eliminates force feedback, allowing the proof mass to move freely at all times. This takes advantage of some advanced optical spatial filtering that was developed at Symphony Acoustics for other types of sensors, and was recently adapted to this work. After processing the signals in real time, the digital output of the device is intrinsically linear, and the sensor can operate at any orientation with the same level of resolution, while instantly adapting to significant changes in orientation. Ultimately, we expect the dynamic range to be up to 180 dB. Currently, we have observed the noise floor in a 0.1 Hz to 10 Hz bandwidth to be near -160 dB/Hz relative to 1 m2/s4. To meet the objectives of this program, we are finalizing the design of a 3 axis sensor for shallow borehole deployments, with a diameter of 40 mm and a length a 150 mm.

Carr, Dustin W., PhD.; Baldwin, Patrick C.; Milburn, Howard; Robinson, David

2011-09-12T23:59:59.000Z

329

Sensors & Controls | Department of Energy  

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

Sensors & Controls Sensors & Controls Sensors & Controls The Emerging Technologies team conducts research into technologies related to building sensors and controls. They work with building systems-such as a heating, ventilation, and air conditioning (HVAC) systems-to analyze energy use and help occupants manage energy costs. Building controls have the potential to reduce building energy consumption by monitoring variables and other inputs, and then automatically responding in a predetermined fashion. Research between the Department of Energy, industry, and laboratories focuses on: Sensors Photo of a ceiling-mounted fire sprinkler. Sensors are designed to help building owners and operators better manage their energy use through automation. Sensors measure predefined variables, such as the amount of

330

Defenses against Covert-Communications in Multimedia and Sensor Networks  

E-Print Network (OSTI)

Steganography and covert-communications represent a great and real threat today more than ever due to the evolution of modern communications. This doctoral work proposes defenses against such covert-communication techniques in two threatening but underdeveloped domains. Indeed, this work focuses on the novel problem of visual sensor network steganalysis but also proposes one of the first solutions against video steganography. The first part of the dissertation looks at covert-communications in videos. The contribution of this study resides in the combination of image processing using motion vector interpolation and non-traditional detection theory to obtain better results in identifying the presence of embedded messages in videos compared to what existing still-image steganalytic solutions would offer. The proposed algorithm called MoViSteg utilizes the specifics of video, as a whole and not as a series of images, to decide on the occurrence of steganography. Contrary to other solutions, MoViSteg is a video-specific algorithm, and not a repetitive still-image steganalysis, and allows for detection of embedding in partially corrupted sequences. This dissertation also lays the foundation for the novel study of visual sensor network steganalysis. We develop three different steganalytic solutions to the problem of covert-communications in visual sensor networks. Because of the inadequacy of the existing steganalytic solutions present in the current research literature, we introduce the novel concept of preventative steganalysis, which aims at discouraging potential steganographic attacks. We propose a set of solutions with active and passive warden scenarii using the material made available by the network. To quantify the efficiency of the preventative steganalysis, a new measure for evaluating the risk of steganography is proposed: the embedding potential which relies on the uncertainty of the image’s pixel values prone to corruption.

Jainsky, Julien Sebastien 1981-

2012-12-01T23:59:59.000Z

331

An Observation of a Circular Motion using Ordinary Appliances: Train Toy, Digital Camera, and Android based Smartphone  

E-Print Network (OSTI)

Using a digital camera (Sony DSC-S75) in its video mode and a smartphone (Samsung GT-N700) equipped with an acceleration sensor, observation of a uniform circular motion of a toy train (Thomas & Friends, Player World, CCF No. 2277-13) is conducted. From the first observation average centripetal acceleration about 0.154 m/s2 is obtained, while the second gives 0.350 m/s2 of average centripetal acceleration by assuming ideal condition, where measured accelerations in z direction is not interpreted.

Viridi, Sparisoma; Nasri, Meldawati

2013-01-01T23:59:59.000Z

332

Six degree of freedom sensor  

DOE Patents (OSTI)

This small, non-contact optical sensor increases the capability and flexibility of computer controlled machines by detecting its relative position to a workpiece in all six degrees of freedom (DOF). At a fraction of the cost, it is over 200 times faster and up to 25 times more accurate than competing 3-DOF sensors. Applications range from flexible manufacturing to a 6-DOF mouse for computers. Until now, highly agile and accurate machines have been limited by their inability to adjust to changes in their tasks. By enabling them to sense all six degrees of position, these machines can now adapt to new and complicated tasks without human intervention or delay--simplifying production, reducing costs, and enhancing the value and capability of flexible manufacturing.

Vann, Charles S. (Fremont, CA)

1999-01-01T23:59:59.000Z

333

Six degree of freedom sensor  

DOE Patents (OSTI)

This small, non-contact optical sensor increases the capability and flexibility of computer controlled machines by detecting its relative position to a workpiece in all six degrees of freedom (DOF). At a fraction of the cost, it is over 200 times faster and up to 25 times more accurate than competing 3-DOF sensors. Applications range from flexible manufacturing to a 6-DOF mouse for computers. Until now, highly agile and accurate machines have been limited by their inability to adjust to changes in their tasks. By enabling them to sense all six degrees of position, these machines can now adapt to new and complicated tasks without human intervention or delay--simplifying production, reducing costs, and enhancing the value and capability of flexible manufacturing. 3 figs.

Vann, C.S.

1999-03-16T23:59:59.000Z

334

Fiber-optic voltage sensor  

DOE Patents (OSTI)

A fiber optic voltage sensor is described which includes a source of light, a reference fiber for receiving a known percentage of the light and an electrostrictive element having terminals across which is applied, a voltage to be measured. The electrostrictive element is responsive to the applied voltage to assume an altered physical state. A measuring fiber also receives a known percentage of light from the light source and is secured about the electrostrictive element. The measuring fiber is provided with a cladding and exhibits an evanescent wave in the cladding. The measuring fiber has a known length which is altered when the electrostrictive element assumes its altered physical state. A differential sensor is provided which senses the intensity of light in both the reference fiber and the measuring fiber and provides an output indicative of the difference between the intensities.

Wood, C.B.

1990-01-01T23:59:59.000Z

335

Fiber-optic voltage sensor  

DOE Patents (OSTI)

A fiber optic voltage sensor is described which includes a source of light, a reference fiber for receiving a known percentage of the light and an electrostrictive element having terminals across which is applied, a voltage to be measured. The electrostrictive element is responsive to the applied voltage to assume an altered physical state. A measuring fiber also receives a known percentage of light from the light source and is secured about the electrostrictive element. The measuring fiber is provided with a cladding and exhibits an evanescent wave in the cladding. The measuring fiber has a known length which is altered when the electrostrictive element assumes its altered physical state. A differential sensor is provided which senses the intensity of light in both the reference fiber and the measuring fiber and provides an output indicative of the difference between the intensities.

Wood, C.B.

1990-12-31T23:59:59.000Z

336

Capacitively-coupled inductive sensor  

DOE Patents (OSTI)

It is therefore an object of the present invention to provide a capacitively-coupled inductive shunt current sensor. To achieve the other object, and in accordance with the purpose of the present invention, as embodied and broadly described herein, the apparatus of this invention may comprise a capacitively coupled inductive shunt current sensor comprising: annular inductive channel means formed in a conductor carrying a high voltage pulsed current; an electrode capacitively coupled to said conductor on opposite sides of said annular inductive channel means; voltage dividing capacitor means connected in series with said electrode for reducing the magnitude of the detected output signal; output coupling means connected to said voltage dividing capacitor means for producing an output signal representative of said high voltage pulsed current.

Ekdahl, C.A.

1981-04-13T23:59:59.000Z

337

System and method for generating motion corrected tomographic images  

DOE Patents (OSTI)

A method and related system for generating motion corrected tomographic images includes the steps of illuminating a region of interest (ROI) to be imaged being part of an unrestrained live subject and having at least three spaced apart optical markers thereon. Simultaneous images are acquired from a first and a second camera of the markers from different angles. Motion data comprising 3D position and orientation of the markers relative to an initial reference position is then calculated. Motion corrected tomographic data obtained from the ROI using the motion data is then obtained, where motion corrected tomographic images obtained therefrom.

Gleason, Shaun S. (Knoxville, TN); Goddard, Jr., James S. (Knoxville, TN)

2012-05-01T23:59:59.000Z

338

Error Reduction for Weigh-In-Motion  

Science Conference Proceedings (OSTI)

Federal and State agencies need certifiable vehicle weights for various applications, such as highway inspections, border security, check points, and port entries. ORNL weigh-in-motion (WIM) technology was previously unable to provide certifiable weights, due to natural oscillations, such as vehicle bouncing and rocking. Recent ORNL work demonstrated a novel filter to remove these oscillations. This work shows further filtering improvements to enable certifiable weight measurements (error < 0.1%) for a higher traffic volume with less effort (elimination of redundant weighing).

Hively, Lee M [ORNL; Abercrombie, Robert K [ORNL; Scudiere, Matthew B [ORNL; Sheldon, Frederick T [ORNL

2009-01-01T23:59:59.000Z

339

The equation of motion of an electron  

SciTech Connect

We review the current status of understanding of the equation of motion of an electron. Classically, a consistent, linearized theory exists for an electron of finite extent, as long as the size of the electron is larger than the classical electron radius. Nonrelativistic quantum mechanics seems to offer a fine theory even in the point particle limit. Although there is as yet no convincing calculation, it is probable that a quantum electrodynamical result will be at least as well-behaved as is the nonrelativistic quantum mechanical results. {copyright} {ital 1999 American Institute of Physics.}

Kim, K. [Argonne National Laboratory, Argonne, Illinois 60439 and The University of Chicago, Chicago, Illinois 60637 (United States); Sessler, A.M. [Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

1999-07-01T23:59:59.000Z

340

The equation of motion of an electron.  

SciTech Connect

We review the current status of understanding of the equation of motion of an electron. Classically, a consistent linearized theory exists for an electron of finite extent, as long as the size of the electron is larger than the classical electron radius. Nonrelativistic quantum mechanics seems to offer a fine theory even in the point particle limit. Although there is as yet no convincing calculation, it is probable that a quantum electrodynamical result will be at least as well-behaved as is the nonrelativistic quantum mechanical results.

Kim, K.-J.

1998-09-02T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Category:Active Sensors | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Category Edit History Facebook icon Twitter icon » Category:Active Sensors Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Active Sensors page? For detailed information on exploration techniques, click here. Category:Active Sensors Add.png Add a new Active Sensors Technique Subcategories This category has only the following subcategory. R [×] Radar‎ 5 pages Pages in category "Active Sensors" The following 2 pages are in this category, out of 2 total. L LiDAR R Radar Retrieved from "http://en.openei.org/w/index.php?title=Category:Active_Sensors&oldid=689848"

342

Ultrasensitive surveillance of sensors and processes  

DOE Patents (OSTI)

A method and apparatus for monitoring a source of data for determining an operating state of a working system. The method includes determining a sensor (or source of data) arrangement associated with monitoring the source of data for a system, activating a method for performing a sequential probability ratio test if the data source includes a single data (sensor) source, activating a second method for performing a regression sequential possibility ratio testing procedure if the arrangement includes a pair of sensors (data sources) with signals which are linearly or non-linearly related; activating a third method for performing a bounded angle ratio test procedure if the sensor arrangement includes multiple sensors and utilizing at least one of the first, second and third methods to accumulate sensor signals and determining the operating state of the system.

Wegerich, Stephan W. (Glendale Heights, IL); Jarman, Kristin K. (Richland, WA); Gross, Kenneth C. (Bolingbrook, IL)

2001-01-01T23:59:59.000Z

343

Ultrasensitive surveillance of sensors and processes  

DOE Patents (OSTI)

A method and apparatus for monitoring a source of data for determining an operating state of a working system. The method includes determining a sensor (or source of data) arrangement associated with monitoring the source of data for a system, activating a method for performing a sequential probability ratio test if the data source includes a single data (sensor) source, activating a second method for performing a regression sequential possibility ratio testing procedure if the arrangement includes a pair of sensors (data sources) with signals which are linearly or non-linearly related; activating a third method for performing a bounded angle ratio test procedure if the sensor arrangement includes multiple sensors and utilizing at least one of the first, second and third methods to accumulate sensor signals and determining the operating state of the system.

Wegerich, Stephan W. (Glendale Heights, IL); Jarman, Kristin K. (Richland, WA); Gross, Kenneth C. (Bolingbrook, IL)

1999-01-01T23:59:59.000Z

344

Thin Silicon MEMS Contact-Stress Sensor  

SciTech Connect

This thin, MEMS contact-stress (CS) sensor continuously and accurately measures time-varying, solid interface loads in embedded systems over tens of thousands of load cycles. Unlike all other interface load sensors, the CS sensor is extremely thin (< 150 {micro}m), provides accurate, high-speed measurements, and exhibits good stability over time with no loss of calibration with load cycling. The silicon CS sensor, 5 mm{sup 2} and 65 {micro}m thick, has piezoresistive traces doped within a load-sensitive diaphragm. The novel package utilizes several layers of flexible polyimide to mechanically and electrically isolate the sensor from the environment, transmit normal applied loads to the diaphragm, and maintain uniform thickness. The CS sensors have a highly linear output in the load range tested (0-2.4 MPa) with an average accuracy of {+-} 1.5%.

Kotovsky, J; Tooker, A; Horsley, D

2010-03-22T23:59:59.000Z

345

Distributed sensor networks with collective computation  

Science Conference Proceedings (OSTI)

Simulations of a network of N sensors have been performed. The simulation space contains a number of sound sources and a large number of sensors. Each sensor is equipped with an omni-directional microphone and is capable of measuring only the time of arrival of a signal. Sensors are able to wirelessly transmit and receive packets of information, and have some computing power. The sensors were programmed to merge all information (received packets as well as local measurements) into a 'world view' for that node. This world view is then transmitted. In this way, information can slowly diffuse across the network. One node was monitored in the network as a proxy for when information had diffused across the network. Simulations demonstrated that the energy expended per sensor per time step was approximately independent of N.

Lanman, D. R. (Douglas R.)

2001-01-01T23:59:59.000Z

346

Energy harvesting sensor nodes: Survey and implications  

E-Print Network (OSTI)

Sensor networks with battery-powered nodes can seldom simultaneously meet the design goals of lifetime, cost, sensing reliability and sensing and transmission coverage. Energy-harvesting, converting ambient energy to electrical energy, has emerged as an alternative to power sensor nodes. By exploiting recharge opportunities and tuning performance parameters based on current and expected energy levels, energy harvesting sensor nodes have the potential to address the conflicting design goals of lifetime and performance. This paper surveys various aspects of energy harvesting sensor systems — architecture, energy sources and storage technologies and examples of harvesting-based nodes and applications. The study also discusses the implications of recharge opportunities on sensor node operation and design of sensor network solutions. 1

Sujesha Sudevalayam; Purushottam Kulkarni

2008-01-01T23:59:59.000Z

347

HYDROCARBON AND SULFUR SENSORS FOR SOFC SYSTEMS  

DOE Green Energy (OSTI)

The following report summarizes work conducted during the Phase I program Hydrocarbon and Sulfur Sensors for SOFC Systems under contract No. DE-FC26-02NT41576. For the SOFC application, sensors are required to monitor hydrocarbons and sulfur in order to increase the operation life of SOFC components. This report discusses the development of two such sensors, one based on thick film approach for sulfur monitoring and the second galvanic based for hydrocarbon monitoring.

A.M. Azad; Chris Holt; Todd Lesousky; Scott Swartz

2003-11-01T23:59:59.000Z

348

Low-Cost Fiber Optic Pressure Sensor  

DOE Patents (OSTI)

The size and cost of fabricating fiber optic pressure sensors is reduced by fabricating the membrane of the sensor in a non-planar shape. The design of the sensors may be made in such a way that the non-planar membrane becomes a part of an air-tight cavity, so as to make the membrane resilient due to the air-cushion effect of the air-tight cavity. Such non-planar membranes are easier to make and attach.

Sheem, Sang K. (Pleasanton, CA)

2004-05-18T23:59:59.000Z

349

Low-Cost Fiber Optic Pressure Sensor  

DOE Patents (OSTI)

The size and cost of fabricating fiber optic pressure sensors is reduced by fabricating the membrane of the sensor in a non-planar shape. The design of the sensors may be made in such a way that the non-planar membrane becomes a part of an air-tight cavity, so as to make the membrane resilient due to the air-cushion effect of the air-tight cavity. Such non-planar membranes are easier to make and attach.

Sheem, Sang K. (Pleasanton, CA)

2003-07-22T23:59:59.000Z

350

Hanford Site lighting occupancy sensor study  

SciTech Connect

This study was designed to assess the potential energy savings from the use of lighting occupancy sensor control in the US Department of Energy (DOE) Hanford Site office facilities. The final results of the study provide useful information for assessing cost-effective use of occupancy sensor lighting control. The results also include specific application data for Hanford Site office building spaces that indicate where sensor technology could be applied for cost-effective energy savings.

Richman, E.E.; Dittmer, A.L.; Keller, J.M.

1993-09-01T23:59:59.000Z

351

Carbon nanotube temperature and pressure sensors  

Science Conference Proceedings (OSTI)

The present invention, in one embodiment, provides a method of measuring pressure or temperature using a sensor including a sensor element composed of a plurality of carbon nanotubes. In one example, the resistance of the plurality of carbon nanotubes is measured in response to the application of temperature or pressure. The changes in resistance are then recorded and correlated to temperature or pressure. In one embodiment, the present invention provides for independent measurement of pressure or temperature using the sensors disclosed herein.

Ivanov, Ilia N; Geohegan, David Bruce

2013-10-29T23:59:59.000Z

352

Sensor Development for PEM Fuel Cell Systems  

DOE Green Energy (OSTI)

This document reports on the work done by Honeywell Sensing and Control to investigate the feasibility of modifying low cost Commercial Sensors for use inside a PEM Fuel Cell environment. Both stationary and automotive systems were considered. The target environment is hotter (100 C) than the typical commercial sensor maximum of 70 C. It is also far more humid (100% RH condensing) than the more typical 95% RH non-condensing at 40 C (4% RH maximum at 100 C). The work focused on four types of sensors, Temperature, Pressure, Air Flow and Relative Humidity. Initial design goals were established using a market research technique called Market Driven Product Definition (MDPD). A series of interviews were conducted with various users and system designers in their facilities. The interviewing team was trained in data taking and analysis per the MDPD process. The final result was a prioritized and weighted list of both requirements and desires for each sensor. Work proceeded on concept development for the 4 types of sensors. At the same time, users were developing the actual fuel cell systems and gaining knowledge and experience in the use of sensors and controls systems. This resulted in changes to requirements and desires that were not anticipated during the MDPD process. The concepts developed met all the predicted requirements. At the completion of concept development for the Pressure Sensor, it was determined that the Fuel Cell developers were happy with off-the-shelf automotive pressure sensors. Thus, there was no incentive to bring a new Fuel Cell Specific Pressure Sensor into production. Work was therefore suspended. After the experience with the Pressure Sensor, the requirements for a Temperature Sensor were reviewed and a similar situation applied. Commercially available temperature sensors were adequate and cost effective and so the program was not continued from the Concept into the Design Phase.

Steve Magee; Richard Gehman

2005-07-12T23:59:59.000Z

353

Guide of Sensor Technology Application Practices  

Science Conference Proceedings (OSTI)

This technical update provides guidance on the deployment of sensors on the electric distribution system. Sensors are defined as devices, embedded in distribution equipment or standing alone, which measure parameters such as voltage, current or temperature, and report those measurements back to the electric utility through some form of communications. These sensors support a wide range of applications intended to improve reliability, manage assets, detect/prevent failures, or support operations. ...

2012-12-13T23:59:59.000Z

354

Absolute motion Galilean relativity (hence Einstein’s) not correct  

E-Print Network (OSTI)

The concept of relativity of motion was first introduced by Galileo. In his principle of invariance he stated that the laws of motion are the same in all inertial frames. He used the Galileo’s ship thought experiment in his argument, among other arguments. This principle of invariance was then modified by Einstein (special relativity), which included the speed of light to be invariant in all inertial frames. Therefore, the relativity theory we know today is based on Galileo’s principle of invariance. There is no sound argument yet in support of relativity of motion. Simply because an observer hasn’t been able to identify between illusion of motion and real motion cannot be taken as a sound argument to support relativity of motion. However, in the usual arguments of relativity of motion, to detect absolute motion is difficult. In this paper, a sound argument against Galileo’s principle of invariance will be presented, which will prove the notion of absolute motion to be correct and disprove relativity of motion, both Galileo’s and Einstein’s. Discussion Imagine two hypothetical identical solar systems in space, initially at rest relative to each other, separated by some distance, with an observer in each solar system. For simplicity, assume that each solar system has one sun and one planet only, the two solar systems do not affect each other, and that the planetary orbits are both circular.

Henok Tadesse; Electrical Engineer

2013-01-01T23:59:59.000Z

355

Lorentz transformations with arbitrary line of motion  

E-Print Network (OSTI)

Sometimes it becomes a matter of natural choice for an observer (A) that he prefers a coordinate system of two-dimensional spatial x-y coordinates from which he observes another observer (B) who is moving at a uniform speed along a line of motion, which is not collinear with As chosen x or y axis. It becomes necessary in such cases to develop Lorentz transformations where the line of motion is not aligned with either the x or the y-axis. In this paper we develop these transformations and show that under such transformations, two orthogonal systems (in their respective frames) appear non-orthogonal to each other. We also illustrate the usefulness of the transformation by applying it to three problems including the rod-slot problem. The derivation has been done before using vector algebra. Such derivations assume that the axes of K and K-prime are parallel. Our method uses matrix algebra and shows that the axes of K and K-prime do not remain parallel, and in fact K and K-prime which are properly orthogonal are observed to be non-orthogonal by K-prime and K respectively. http://www.iop.org/EJ/abstract/0143-0807/28/2/004

Chandru Iyer; G. M. Prabhu

2008-09-18T23:59:59.000Z

356

Body sensor network security: an identity-based cryptography approach  

Science Conference Proceedings (OSTI)

A body sensor network (BSN), is a network of sensors deployed on a person's body, usually for health care monitoring. Since the sensors collect personal medical data, security and privacy are important components in a body sensor network. At the same ... Keywords: body sensor networks, identity-based cryptography, security

Chiu C. Tan; Haodong Wang; Sheng Zhong; Qun Li

2008-03-01T23:59:59.000Z

357

Deploying a Wireless Sensor Network on an Active Volcano  

Science Conference Proceedings (OSTI)

Augmenting heavy and power-hungry data collection equipment with lighter, smaller wireless sensor network nodes leads to faster, larger deployments. Arrays comprising dozens of wireless sensor nodes are now possible, allowing scientific studies that ... Keywords: wireless sensor networks, sensor network applications, sensor network nodes, volcano research

Geoffrey Werner-Allen; Konrad Lorincz; Matt Welsh; Omar Marcillo; Jeff Johnson; Mario Ruiz; Jonathan Lees

2006-03-01T23:59:59.000Z

358

Advanced Sensors and Instrumentation | Department of Energy  

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

Sensors and Instrumentation Sensors and Instrumentation Advanced Sensors and Instrumentation The ASI subprogram plans to develop the scientific basis for sensors and supporting infrastructure technology that will address crosscutting technology gaps relating to measurements at existing and advanced nuclear power plants as well as within their fuel cycles. The focus of the program is on the following technical challenges and objectives: Identify needed physical measurement accuracy of nuclear system process parameters and minimize uncertainty. Identify and conduct research into monitoring and control technologies, including human factors, to achieve control of new nuclear energy processes, and new methodologies for monitoring to achieve high reliability and availability. Integrate control of multiple processes, potential reductions in

359

Sensors & Measurement | Clean Energy | ORNL  

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

Electrical and Electronics Systems Research Sustainable Electricity Systems Biology Transportation Clean Energy Home | Science & Discovery | Clean Energy | Research Areas | Sensors & Measurement SHARE Sensors & Measurement Oak Ridge National Laboratory's (ORNL) capability in the research and development of sensor materials, sensors technologies, new instrumentation, and measurement systems is critical to its ability to translate breakthrough science into robust technologies, systems, and methods that address high-risk, high-complexity, multidisciplinary issues of national importance. This capability is manifested in a culture that effectively creates and manages complex systems by (1) developing detailed analytical processes to establish requirements, (2) analyzing candidate system

360

Ultrahigh-Temperature Distributed Wireless Sensors  

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

Ultrahigh-Temperature Distributed Wireless Sensors Description The U.S. Department of Energy (DOE) National Energy Technology Laboratory (NETL) is working in cooperation with Prime...

Note: This page contains sample records for the topic "timer motion sensor" 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

NIST Sensor Improvement Brings Analysis Method Into ...  

Science Conference Proceedings (OSTI)

NIST Sensor Improvement Brings Analysis Method into Mainstream Video Transcript (back ... But the vault's days on the job may soon be numbered ...

2011-12-20T23:59:59.000Z

362

Structure and yarn sensor for fabric  

DOE Patents (OSTI)

A structure and yarn sensor for fabric directly determines pick density in a fabric thereby allowing fabric length and velocity to be calculated from a count of the picks made by the sensor over known time intervals. The structure and yarn sensor is also capable of detecting full length woven defects and fabric. As a result, an inexpensive on-line pick (or course) density measurement can be performed which allows a loom or knitting machine to be adjusted by either manual or automatic means to maintain closer fiber density tolerances. Such a sensor apparatus dramatically reduces fabric production costs and significantly improves fabric consistency and quality for woven or knitted fabric.

Mee, David K. (Knoxville, TN); Allgood, Glenn O. (Powell, TN); Mooney, Larry R. (Knoxville, TN); Duncan, Michael G. (Clinton, TN); Turner, John C. (Clinton, TN); Treece, Dale A. (Knoxville, TN)

1998-01-01T23:59:59.000Z

363

Energy Harvesting Support for Sensor Networking  

E-Print Network (OSTI)

no harvesting energy Environment Aware DC Step-Up Converterand solar energy info with host sensor node DC Step-Up

Jason Hsu; Aman Kansal; Mani Srivastava

2004-01-01T23:59:59.000Z

364

Distributed Sensor Coordination for Advanced Energy Systems  

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

Distributed Sensor Coordination for Advanced Energy Systems Background As advanced energy systems grow in size, they require an increasing number of pressure, temperature, and...

365

Intelligent Software Agents for Enhancing Sensor Networks ...  

Technology Marketing Summary Intelligent software agents developed by ORNL researchers can be used with sensor networks in distributed and centralized computing ...

366

Millimeter Wave Sensors for Clean Energy  

Science Conference Proceedings (OSTI)

Millimeter wave sensor data on refractory used for clean coal gasification will also be presented. Future applications in the area of clean energy will be ...

367

Nanomechanical Sensor Detects and Identifies Chemical Analytes  

ORNL 2010-G00612/jcn UT-B ID 200802066 Nanomechanical Sensor Detects and Identifies Chemical Analytes Technology Summary ORNL researchers developed a ...

368

Solid State Gas Sensors - Energy Innovation Portal  

The total cost of ownership (TCO) for gas sensors today is a limiting factor in improving safety, air quality, and energy efficiency.

369

Energy Harvesting Support for Sensor Networking  

E-Print Network (OSTI)

battery status and solar energy info with host sensor nodelevel Yellow bar represent solar energy received locally •AHeliomoteR A integrated solar energy harvesting and storage

Jason Hsu; Aman Kansal; Mani Srivastava

2004-01-01T23:59:59.000Z

370

Argonne CNM Highlight: Flexible Hydrogen Sensors  

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

sheets reduces their overall weight and increases their mechanical flexibility and shock resistance. Flexible hydrogen sensors show a change of 75% in their resistance when...

371

Lighting Controls/Sensors | Open Energy Information  

Open Energy Info (EERE)

Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon Lighting ControlsSensors Jump to: navigation, search TODO: Add description List of Lighting...

372

Wireless Sensors Improve Data Center Efficiency  

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

foot, increase, energy savings for cooling can be realized by applying wireless sensor network (WSN) technology and using the gathered information to efficiently manage the data...

373

Polyaniline Nanothin Film Chemiresistive Gas Sensors  

E-Print Network (OSTI)

of formaldehyde, carbon dioxide, ozone and nerve agent sarin4: A MINIATURIZED CARBON DIOXIDE CHEMIRESISTIVE SENSOR USINGdioxide, formaldehyde, carbon dioxide, ozone and nerve

Srinives, Sira

2012-01-01T23:59:59.000Z

374

Mini Magnetic Sensor May Have Biomedical, Security ...  

Science Conference Proceedings (OSTI)

... The sensor could be battery-operated and could reduce the costs of ... As the laser beam passes through the atomic vapor, scientists measure the ...

2012-04-16T23:59:59.000Z

375

Sensors, Sampling, and Simulation for Process Control  

Science Conference Proceedings (OSTI)

New sensor technologies, more advanced real-time models, and faster computers are enabling better control systems for these processes. Specific topics ...

376

NIST, Sensor Science Division, Ultraviolet Radiation Group ...  

Science Conference Proceedings (OSTI)

Uwe Arp. Dr. Uwe Arp is a physicist in the Ultraviolet Radiation Group of the Sensor Science Division in the Physical Measurement Laboratory. ...

2013-08-19T23:59:59.000Z

377

Chemical preconcentrator with integral thermal flow sensor  

DOE Patents (OSTI)

A chemical preconcentrator with integral thermal flow sensor can be used to accurately measure fluid flow rate in a microanalytical system. The thermal flow sensor can be operated in either constant temperature or constant power mode and variants thereof. The chemical preconcentrator with integral thermal flow sensor can be fabricated with the same MEMS technology as the rest of the microanlaytical system. Because of its low heat capacity, low-loss, and small size, the chemical preconcentrator with integral thermal flow sensor is fast and efficient enough to be used in battery-powered, portable microanalytical systems.

Manginell, Ronald P. (Albuquerque, NM); Frye-Mason, Gregory C. (Cedar Crest, NM)

2003-01-01T23:59:59.000Z

378

Assessment of fiber optic pressure sensors  

SciTech Connect

This report presents the results of a six-month Phase 1 study to establish the state-of-the-art in fiber optic pressure sensing and describes the design and principle of operation of various fiber optic pressure sensors. This study involved a literature review, contact with experts in the field, an industrial survey, a site visit to a fiber optic sensor manufacturer, and laboratory testing of a fiber optic pressure sensor. The laboratory work involved both static and dynamic performance tests. In addition, current requirements for environmental and seismic qualification of sensors for nuclear power plants were reviewed to determine the extent of the qualification tests that fiber optic pressure sensors may have to meet before they can be used in nuclear power plants. This project has concluded that fiber optic pressure sensors are still in the research and development stage and only a few manufacturers exist in the US and abroad which supply suitable fiber optic pressure sensors for industrial applications. Presently, fiber optic pressure sensors are mostly used in special applications for which conventional sensors are not able to meet the requirements.

Hashemian, H.M.; Black, C.L.; Farmer, J.P. [Analysis and Measurement Services Corp., Knoxville, TN (United States)

1995-04-01T23:59:59.000Z

379

Energy Saving Methods in Wireless Sensor Networks.  

E-Print Network (OSTI)

?? To predict the lifetime of wireless sensor networks before their installation is an important concern. The IEEE 802.15.4 standard is specifically meant to support… (more)

JAWAD ALI, SYED

2008-01-01T23:59:59.000Z

380

Robust Semidefinite Programming Approaches for Sensor Network ...  

E-Print Network (OSTI)

May 21, 2006 ... Many applications use ad hoc wireless sensor networks for ...... Technical report, Operation Research, Stanford University, Stanford, CA,. 2005.

Note: This page contains sample records for the topic "timer motion sensor" 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

Wireless Sensors for Data Centers  

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

Proving Ground Proving Ground Wireless Sensors for Data Centers Kevin Powell |May 23 2012 | FEMP Technology Deployment Working Group 9,624 Owned and Leased Assets 30% Metered Energy Reduction, by 2015 NET ZERO In New Construction and Major Remodels, by 2030 EISA 2007 GSA's Green Proving Ground The Green Proving Ground aims to leverage innovative technologies to accelerate GSA's sustainability goals. Program Focus: Identify, test and evaluate innovative technologies to: * Drive innovation in environmental performance in federal buildings * Help lead market transformation through deployment of new technologies. * Reduce GSA operational costs How Does It Work? Green Proving Ground

382

Wireless Sensors for Data Centers  

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

Proving Ground Proving Ground Wireless Sensors for Data Centers Kevin Powell |May 23 2012 | FEMP Technology Deployment Working Group 9,624 Owned and Leased Assets 30% Metered Energy Reduction, by 2015 NET ZERO In New Construction and Major Remodels, by 2030 EISA 2007 GSA's Green Proving Ground The Green Proving Ground aims to leverage innovative technologies to accelerate GSA's sustainability goals. Program Focus: Identify, test and evaluate innovative technologies to: * Drive innovation in environmental performance in federal buildings * Help lead market transformation through deployment of new technologies. * Reduce GSA operational costs How Does It Work? Green Proving Ground

383

Renewable-reagent electrochemical sensor  

DOE Patents (OSTI)

A new electrochemical probe(s) design allowing for continuous (renewable) reagent delivery. The probe comprises an integrated membrane-sampling/electrochemical sensor that prevents interferences from surface-active materials and greatly extends the linear range. The probe(s) is useful for remote or laboratory-based monitoring in connection with microdialysis sampling and electrochemical measurements of metals and organic compounds that are not readily detected in the absence of reacting with the compound. Also disclosed is a method of using the probe(s).

Wang, Joseph (Las Cruces, NM); Olsen, Khris B. (Richland, WA)

1999-01-01T23:59:59.000Z

384

Renewable-reagent electrochemical sensor  

DOE Patents (OSTI)

A new electrochemical probe(s) design allowing for continuous (renewable) reagent delivery is described. The probe comprises an integrated membrane sampling/electrochemical sensor that prevents interferences from surface-active materials and greatly extends the linear range. The probe(s) is useful for remote or laboratory-based monitoring in connection with microdialysis sampling and electrochemical measurements of metals and organic compounds that are not readily detected in the absence of reacting with the compound. Also disclosed is a method of using the probe(s). 19 figs.

Wang, J.; Olsen, K.B.

1999-08-24T23:59:59.000Z

385

Thin-film spectroscopic sensor  

DOE Patents (OSTI)

There is disclosed an integrated spectrometer for chemical analysis by evanescent electromagnetic radiation absorption in a reaction volume. The spectrometer comprises a noninteractive waveguide, a substrate, an entrance grating and an exit grating, an electromagnetic radiation source, and an electromagnetic radiation sensing device. There is further disclosed a chemical sensor to determine the pressure and concentration of a chemical species in a mixture comprising an interactive waveguide, a substrate, an entrance grating and an exit grating, an electromagnetic radiation source, and an electromagnetic radiation sensing device.

Burgess, Jr., Lloyd W. (Seattle, WA); Goldman, Don S. (Richland, WA)

1992-01-01T23:59:59.000Z

386

Capacitively-coupled inductive sensor  

DOE Patents (OSTI)

A capacitively coupled inductive shunt current sensor which utilizes capacitive coupling between flanges having an annular inductive channel formed therein. A voltage dividing capacitor is connected between the coupling capacitor and ground to provide immediate capacitive division of the output signal so as to provide a high frequency response of the current pulse to be detected. The present invention can be used in any desired outer conductor such as the outer conductor of a coaxial transmission line, the outer conductor of an electron beam transmission line, etc.

Ekdahl, Carl A. (Albuquerque, NM)

1984-01-01T23:59:59.000Z

387

SensorScope: Application-specific sensor network for environmental monitoring  

Science Conference Proceedings (OSTI)

SensorScope is a turnkey solution for environmental monitoring systems, based on a wireless sensor network and resulting from a collaboration between environmental and network researchers. Given the interest in climate change, environmental monitoring ... Keywords: Architecture, deployment, environmental monitoring, implementation, wireless sensor network

François Ingelrest; Guillermo Barrenetxea; Gunnar Schaefer; Martin Vetterli; Olivier Couach; Marc Parlange

2010-02-01T23:59:59.000Z

388

MHK Technologies/Blue Motion Energy marine turbine | Open Energy  

Open Energy Info (EERE)

Motion Energy marine turbine Motion Energy marine turbine < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Blue Motion Energy marine turbine.jpg Technology Profile Primary Organization Blue Motion Energy Technology Resource Click here Current Technology Type Click here Cross Flow Turbine Technology Description The Blue Motion Energy marine turbine however uses a patented system of seawalls A placed radial around the vertically mounted rotor B this way it is possible to funnel the current and significantly increase the flow velocity independent of the direction of the current Technology Dimensions Device Testing Date Submitted 59:30.2 << Return to the MHK database homepage Retrieved from "http://en.openei.org/w/index.php?title=MHK_Technologies/Blue_Motion_Energy_marine_turbine&oldid=681547

389

Predicting Merger-Induced Gas Motions in LCDM Galaxy Clusters  

E-Print Network (OSTI)

In the hierarchical structure formation model, clusters of galaxies form through a sequence of mergers and continuous mass accretion, which generate significant random gas motions especially in their outskirts where material is actively accreting. Non-thermal pressure provided by the internal gas motions affects the thermodynamic structure of the X-ray emitting intracluster plasma and introduces biases in the physical interpretation of X-ray and Sunyaev-Zeldovich effect observations. However, we know very little about the nature of gas motions in galaxy clusters. The ASTRO-H X-ray mission, scheduled to launch in 2015, will have a calorimeter capable of measuring gas motions in galaxy clusters at the level of gas motions expected in the LCDM model using hydrodynamical simulations of galaxy cluster formation, focusing on the merger-induced gas motions. We show that the gas velocity dispersion is larger in more massive clusters, but exhibits large ...

Nagai, Daisuke; Avestruz, Camille; Nelson, Kaylea; Rudd, Douglas H

2013-01-01T23:59:59.000Z

390

Transducer Signal Noise Analysis for Sensor Authentication  

SciTech Connect

The abstract is being passed through STIMS for submision to the conference. International safeguards organizations charged with promoting the peaceful use of nuclear energy employ unattended and remote monitoring systems supplemented with onsite inspections to ensure nuclear materials are not diverted for weaponization purposes. These systems are left unattended for periods of several months between inspections. During these periods physical security means are the main deterrent used to detect intentional monitoring system tampering. The information gathering components are locked in secure and sealed rooms. The sensor components (i.e. neutron and gamma detectors) are located throughout the plant in unsecure areas where sensor tampering could take place during the periods between inspections. Sensor tampering could allow the diversion of nuclear materials from the accepted and intended use to uses not consistent with the peaceful use of nuclear energy. A method and an apparatus is presented that address the detection of sensor tampering during the periods between inspections. It was developed at the Idaho National Laboratory (INL) for the Department of Energy (DOE) in support of the IAEA. The method is based on the detailed analysis of the sensor noise floor after the sensor signal is removed. The apparatus consists of a 2.1” x 2.6” electronic circuit board containing all signal conditioning and processing components and a laptop computer running an application that acquires and stores the analysis results between inspection periods. The sensors do not require any modification and are remotely located in their normal high radiation zones. The apparatus interfaces with the sensor signal conductors using a simple pass through connector at the normal sensor electronics interface package located in the already secure and sealed rooms. The apparatus does not require hardening against the effects of radiation due to its location. Presented is the apparatus design, the analysis method, and the test results as applied to tamper detection using three HE3 neutron sensors and two gamma sensors designed and built for safeguards monitoring.

John M. Svoboda (043887); Mark J. Schanfein

2012-07-01T23:59:59.000Z

391

Leak Detection and H2 Sensor Development  

DOE Green Energy (OSTI)

Low-cost, durable, and reliable Hydrogen safety sensor for vehicle, stationary, and infrastructure applications. A new zirconia, electrochemical-based sensor technology is being transitioned out of the laboratory and into an advanced testing phase for vehicular and stationary H{sub 2} safety applications. Mixed potential sensors are a class of electrochemical devices that develop an open-circuit electromotive force due to the difference in the kinetics of the redox reactions of various gaseous species at each electrode/electrolyte/gas interface, referred to as the triple phase boundary (TPB). Therefore, these sensors have been considered for the sensing of various reducible or oxidizable gas species in the presence of oxygen. Based on this principle, a unique sensor design was developed by LANL and LLNL. The uniqueness of this sensor derives from minimizing heterogeneous catalysis (detrimental to sensor response) by avoiding gas diffusion through a catalytically active material and minimizing diffusion path to the TPB. Unlike the conventional design of these devices that use a dense solid electrolyte and porous thin film electrodes (similar to the current state-of-the-art zirconia-based sensors and fuel cells), the design of this sensor uses dense electrodes and porous electrolytes. Such a sensor design facilitates a stable and reproducible device response, since dense electrode morphologies are easy to reproduce and are significantly more stable than the conventional porous morphologies. Moreover, these sensors develop higher mixed potentials since the gas diffusion is through the less catalytically active electrolyte than the electrode. Lastly, the choice of electrodes is primarily based on their O2 reduction kinetics and catalytic properties vis-a-vis the target gas of interest.

Brosha, Eric L. [Los Alamos National Laboratory

2012-07-10T23:59:59.000Z

392

3D Arm Motion Tracking for Home-based Rehabilitation  

E-Print Network (OSTI)

Chapter 13 3D Arm Motion Tracking for Home-based Rehabilitation Y. Tao and H. Hu 13.1 Introduction This paper presents a real-time hybrid solution to articulated 3D arm motion tracking for home-based of articulated objects, e.g., human upper limbs. The purpose is to develop a 3D motion tracking model for home-based

Hu, Huosheng

393

Effects of gravity on capillary motion of fluid  

Science Conference Proceedings (OSTI)

A new experimental approach provides good visualization of the fluid capillary motion along the rectangular groove corners. A hydrodynamically controlled rewetting model

S. H. Chan; T. R. Shen; G. D. Proffitt; B. Singh

1998-01-01T23:59:59.000Z

394

Wind for Schools Portal Motion Chart | Open Energy Information  

Open Energy Info (EERE)

Login | Sign Up Search Page Edit History Facebook icon Twitter icon Wind for Schools Portal Motion Chart Jump to: navigation, search Wind for Schools Portal Home...

395

Potomac Electric Power Company's Motion to Intervene and Comment...  

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

to Intervene and Comment in Support of Emergency Petition and Complaint Potomac Electric Power Company's Motion to Intervene and Comment in Support of Emergency Petition and...

396

Experimental investigations of lip motion in brass instrument playing.  

E-Print Network (OSTI)

??The precise nature of the motion of the lips of the musician is critically important to the sound of the brass wind instrument. The player… (more)

Stevenson, Samuel D. F.

2009-01-01T23:59:59.000Z

397

Joint Motion to Intervene of Northern States Power Company (Minnesota...  

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

States Power Company (Minnesota) et al. on the Proposed Open Access Requirements Joint Motion to Intervene of Northern States Power Company (Minnesota) et al. on the...

398

Transformation of the equatorial proper motion to the Galactic system  

E-Print Network (OSTI)

I present simple analytical equations to transform proper motion vectors from equatorial to Galactic coordinates. These equations do not appear in the literature.

Poleski, Rados?aw

2013-01-01T23:59:59.000Z

399

Free motion in deformed (quantum) four-dimensional space  

E-Print Network (OSTI)

It is shown that trajectories of free motion of the particles in deformed ("quantum") four dimensional space-time are quadratic curves.

A. N. Leznov

2007-07-23T23:59:59.000Z

400

Wall and laser spot motion in cylindrical hohlraums  

Science Conference Proceedings (OSTI)

Wall and laser spot motion measurements in empty, propane-filled and plastic (CH)-lined gold coated cylindrical hohlraums were performed on the Omega laser facility [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)]. Wall motion was measured using axial two-dimensional (2D) x-ray imaging and laser spot motion was perpendicularly observed through a thinned wall using streaked hard x-ray imaging. Experimental results and 2D hydrodynamic simulations show that while empty targets exhibit on-axis plasma collision, CH-lined and propane-filled targets inhibit wall expansion, corroborated with perpendicular streaked imaging showing a slower motion of laser spots.

Huser, G.; Courtois, C.; Monteil, M.-C. [CEA, DAM, DIF, F-91297 Arpajon (France)

2009-03-15T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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.


401

PKM: a pairwise key management scheme for wireless sensor networks  

Science Conference Proceedings (OSTI)

Sensor networks are characterized by strict resource limitations and large scalability. Many sensor network applications require secure communication, a crucial component, especially in harsh environments. Symmetric key cryptography is very attractive ... Keywords: key distribution, key management, security, sensor networks

F. An; X. Cheng; J. M. Rivera; J. Li; Z. Cheng

2005-08-01T23:59:59.000Z

402

Optical Fiber Sensors for Efficient and Economical Oil Recovery...  

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

.0 Pressure Sensors Optical Fiber Sensors for Efficient and Economical Oil Recovery 104 7.0 Pressure Sensors Monitoring of high pressures with high accuracy in oil reservoirs is...

403

Game Theoretic Distributed Energy Control in Sensor Networks  

Science Conference Proceedings (OSTI)

Standard wireless sensor networks models emphasize energy efficiency and distributed decision- making by considering unattended sensors. Wireless sensor networks are confronted with the challenges of performance and energy consumption. To prolong the ...

Jia Zeng; Chundi Mu; Min Jiang

2007-10-01T23:59:59.000Z

404

Vibration detection in turbomachinery using non-contacting sensors  

E-Print Network (OSTI)

Recent developments have seen the introduction of multiple Eddy Current Sensors (ECS) into turbomachinery. These sensors employ an active magnetic field to monitor each blade as it passes the sensor. They generate an ...

Cohen, Eric D., M. Eng. Massachusetts Institute of Technology

2006-01-01T23:59:59.000Z

405

A Delaunay Triangulation Based Method for Wireless Sensor Network Deployment  

Science Conference Proceedings (OSTI)

To obtain a satisfied performance of wireless sensor network, an adaptable sensor deployment method for various applications is essential. In this paper, we propose a centralized sensor deployment method, DT-Score, aims to maximize the coverage of a ...

Chun-Hsien Wu; Kuo-Chuan Lee; Yeh-Ching Chung

2006-07-01T23:59:59.000Z

406

Solid state engine with alternating motion  

DOE Patents (OSTI)

Heat energy is converted to mechanical motion utilizing apparatus including a cylinder, a piston having openings therein reciprocable in the cylinder, inlet and outlet ports for warm water at one end of the cylinder, inlet and outlet ports for cool water at the other end of the cylinder, gates movable with the piston and slidably engaging the cylinder wall to alternately open and close the warm and cool water ports, a spring bearing against the warm water side of the piston and a double helix of a thermal shape memory material attached to the cool end of the cylinder and to the piston. The piston is caused to reciprocate by alternately admitting cool water and warm water to the cylinder.

Golestaneh, A.A.

1980-01-21T23:59:59.000Z

407

Microsoft Word - CCCNH Motion to Intervene  

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

Campton Conservation Commission Campton Conservation Commission c/o Campton Selectmen's Office 12 Gearty Way Campton, NH 03223 13 September 2013 Mr. Christopher Lawrence Office of Electricity Delivery and Energy Reliability (OE-20) US Department of Energy 1000 Independence Avenue, SW Washington, DC 20585 Re: Northern Pass Transmission, LLC, Application for Presidential Permit OE Docket No. PP-371 Dear Mr. Lawrence: Pursuant to Rules 212 and 214 of the Rules of Practice and Procedure of the Federal Energy Regulatory Commission (18 CFR 385.212 and 214 [2010]), we are enclosing for filing our Motion to Intervene to the above-captioned proceeding. In accordance with the Notice of Application for this proceeding (75 FR 69990), we are enclosing fifteen (15) copies.

408

Optimum Sensors Integration for Multi-Sensor Multi-Target Environment for Ballistic Missile Defense Applications  

SciTech Connect

Multi-sensor networks may face resource limitations in a dynamically evolving multiple target tracking scenario. It is necessary to task the sensors efficiently so that the overall system performance is maximized within the system constraints. The central sensor resource manager may control the sensors to meet objective functions that are formulated to meet system goals such as minimization of track loss, maximization of probability of target detection, and minimization of track error. This paper discusses the variety of techniques that may be utilized to optimize sensor performance for either near term gain or future reward over a longer time horizon.

Imam, Neena [ORNL; Barhen, Jacob [ORNL; Glover, Charles Wayne [ORNL

2012-01-01T23:59:59.000Z

409

DFIG Soft-Sensor and its Applications  

Science Conference Proceedings (OSTI)

The rotor speed measurement of doubly fed induction generator (DFIG) is very important to its control system design, but many problems may arise when applying traditional speed sensor. So, it is necessary to study the speed-sensorless measuring technique. ... Keywords: electrical power systems, DFIG, measuring, soft-sensor, speed observer

Kaifeng Zhang, Miao Xu, Li Sun, Haiming Zhou

2012-12-01T23:59:59.000Z

410

Sensor network configuration under physical attacks  

Science Conference Proceedings (OSTI)

Sensor networks will typically operate in hostile environments, where they are susceptible to physical attacks resulting in physical node destructions. In this paper, we study impacts of physical attacks on network configuration w.r.t. lifetime. While ... Keywords: deployment, network configuration, network lifetime, physical attacks, physical node destruction, sensor networks

Xun Wang; Wenjun Gu; Kurt Schosek; Sriram Chellappan; Dong Xuan

2009-04-01T23:59:59.000Z

411

Diagnostic tracing for wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are typically deployed in harsh environments, thus post-deployment failures are not infrequent. An execution trace containing events in their order of execution could play a crucial role in postmortem diagnosis of these failures. ... Keywords: Embedded debugging, diagnosis, tracing, wireless sensor networks

Vinaitheerthan Sundaram; Patrick Eugster; Xiangyu Zhang; Vamsidhar Addanki

2013-07-01T23:59:59.000Z

412

Target tracking with binary proximity sensors  

Science Conference Proceedings (OSTI)

We explore fundamental performance limits of tracking a target in a two-dimensional field of binary proximity sensors, and design algorithms that attain those limits while providing minimal descriptions of the estimated target trajectory. Using geometric ... Keywords: Sensor networks, binary sensing, distributed algorithms, fundamental limits, target tracking

Nisheeth Shrivastava; Raghuraman Mudumbai; Upamanyu Madhow; Subhash Suri

2009-11-01T23:59:59.000Z

413

Cooperative caching in wireless multimedia sensor networks  

Science Conference Proceedings (OSTI)

The recent advances in miniaturization and the creation of low-power circuits, combined with small-sized batteries have made the development of wireless sensor networks a working reality. Lately, the production of cheap complementary metal-oxide semiconductor ... Keywords: cooperative caching, multimedia, replacement policy, wireless sensor networks

Nikos Dimokas; Dimitrios Katsaros; Yannis Manolopoulos

2008-08-01T23:59:59.000Z

414

Building programmable routing service for sensor networks  

Science Conference Proceedings (OSTI)

Current routing services for sensor networks are application-specific. They are pre-configured into nodes, and thus have difficulty in adapting to different applications and network conditions. This paper describes a framework to build programmable routing ... Keywords: Energy saving, Parameterization, Programmable, Routing, Sensor networks

Yu He; Cauligi S. Raghavendra

2005-04-01T23:59:59.000Z

415

An autonomic routing framework for sensor networks  

Science Conference Proceedings (OSTI)

Current routing services for sensor networks are often designed for specific applications and network conditions, thus have difficulty in adapting to application and network dynamics. This paper proposes an autonomic framework to promote the adaptivity ... Keywords: Autonomic routing, Feature functions, Monitoring policies, Sensor networks

Yu He; Cauligi S. Raghavendra; Steven Berson; Robert Braden

2006-04-01T23:59:59.000Z

416

Life cycle support for sensor network applications  

Science Conference Proceedings (OSTI)

Developing applications for sensor networks is a challenging task. Most programming systems narrowly focus on programming issues while ignoring that programming represents only a tiny fraction of the typical life cycle of an application. Furthermore, ... Keywords: assessment, middleware, sensor networks, separation of concerns, software engineering

Urs Bischoff; Gerd Kortuem

2007-11-01T23:59:59.000Z

417

Wireless sensor networks for healthcare: A survey  

Science Conference Proceedings (OSTI)

Becoming mature enough to be used for improving the quality of life, wireless sensor network technologies are considered as one of the key research areas in computer science and healthcare application industries. The pervasive healthcare systems provide ... Keywords: Care for elderly, Children and chronically ill, Pervasive healthcare, Wireless sensor networks

Hande Alemdar; Cem Ersoy

2010-10-01T23:59:59.000Z

418

A wireless sensor network For structural monitoring  

Science Conference Proceedings (OSTI)

Structural monitoring---the collection and analysis of structural response to ambient or forced excitation--is an important application of networked embedded sensing with significant commercial potential. The first generation of sensor networks for structural ... Keywords: Wisden, sensor network, structural health monitoring

Ning Xu; Sumit Rangwala; Krishna Kant Chintalapudi; Deepak Ganesan; Alan Broad; Ramesh Govindan; Deborah Estrin

2004-11-01T23:59:59.000Z

419

Efficient code distribution in wireless sensor networks  

Science Conference Proceedings (OSTI)

The need to reprogramme a wireless sensor network may arise from changing application requirements, bug fixes, or during the application development cycle. Once deployed, it will be impractical at best to reach each individual node. Thus, a scheme is ... Keywords: code distribution, compression, reprogramming, sensor networks, string distance, wireless

Niels Reijers; Koen Langendoen

2003-09-01T23:59:59.000Z

420

Power management in energy harvesting sensor networks  

Science Conference Proceedings (OSTI)

Power management is an important concern in sensor networks, because a tethered energy infrastructure is usually not available and an obvious concern is to use the available battery energy efficiently. However, in some of the sensor networking applications, ... Keywords: Adaptive duty cycling, Heliomote, energy neutrality, lifetime, power management

Aman Kansal; Jason Hsu; Sadaf Zahedi; Mani B. Srivastava

2007-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Dynamic cutter runout measurement with laser sensor  

Science Conference Proceedings (OSTI)

The cutter runout is very common in machine milling and has a great effect on the surface accuracy. In this paper, a measurement of radial cutter runout in revolving milling tool is proposed by using the laser sensor. A laser beam is projected onto the ... Keywords: dynamic cutter runout, high speed milling, laser sensor, milling tool, surface accuracy

XiaoJian Zhang; CaiHua Xiong; Ye Ding

2012-10-01T23:59:59.000Z

422

Fault reconnaissance agent for sensor networks  

Science Conference Proceedings (OSTI)

One of the key prerequisite for a scalable, effective and efficient sensor network is the utilization of low-cost, low-overhead and high-resilient fault-inference techniques. To this end, we propose an intelligent agent system with a problem solving ... Keywords: Management, expectation maximization algorithm, intelligent agents, wireless sensor networks

Elhadi M. Shakshuki; Xinyu Xing; Tarek R. Sheltami

2010-08-01T23:59:59.000Z

423

Fuzzy techniques and internal models for sensors  

Science Conference Proceedings (OSTI)

The paper proposes a new architecture for a sensor with data fusion and internal model estimators. Fuzzy logic is used as an effective tool for data processing. The fusion process of information conducts to the improvement of the measurements accuracy. ... Keywords: fuzzy logic, fuzzy-interpolative, information fusion, internal model, smart sensor, uncertainty

Valentina E. Balas

2009-03-01T23:59:59.000Z

424

Time Constant Estimates for Radiosonde Temperature Sensors  

Science Conference Proceedings (OSTI)

To correct time lag errors in radiosonde temperatures the sensor time constant has to be known. Time constants are not published for some widely used sensors and, in some cases, available time constants disagree. This study focuses on ML-405, ML-...

Marcel E. Tschudin; Steven R. Schroeder

2013-01-01T23:59:59.000Z

425

Deterministic Secure Positioning in Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

Position verification problem is an important building block for a large subset of wireless sensor networks (WSN) applications. As a result, the performance of the WSN degrades significantly when misbehaving nodes report false location information in ... Keywords: Distributed Protocol, Secure Positioning, Wireless Sensor Network

Sylvie Delaët; Partha Sarathi Mandal; Mariusz A. Rokicki; Sébastien Tixeuil

2008-06-01T23:59:59.000Z

426

Efficient XML usage within wireless sensor networks  

Science Conference Proceedings (OSTI)

Integrating wireless sensor networks in heterogeneous networks is a complex task. A reason is the absence of a standardized data exchange format that is supported in all participating sub networks. XML has evolved to the de facto standard data exchange ... Keywords: XML, database management, programming language, wireless sensor networks

Nils Hoeller; Christoph Reinke; Jana Neumann; Sven Groppe; Daniel Boeckmann; Volker Linnemann

2008-11-01T23:59:59.000Z

427

LUSTER: wireless sensor network for environmental research  

Science Conference Proceedings (OSTI)

Environmental wireless sensor network (EWSN) systems are deployed in potentially harsh and remote environments where inevitable node and communication failures must be tolerated. LUSTER---Light Under Shrub Thicket for Environmental Research---is a system ... Keywords: LiteTDMA, architecture, environmental science, implementation, mote, network protocol, storage, validation, wireless sensor network

L. Selavo; A. Wood; Q. Cao; T. Sookoor; H. Liu; A. Srinivasan; Y. Wu; W. Kang; J. Stankovic; D. Young; J. Porter

2007-11-01T23:59:59.000Z

428

Linear air-fuel sensor development  

DOE Green Energy (OSTI)

The electrochemical zirconia solid electrolyte oxygen sensor, is extensively used for monitoring oxygen concentrations in various fields. They are currently utilized in automobiles to monitor the exhaust gas composition and control the air-to-fuel ratio, thus reducing harmful emission components and improving fuel economy. Zirconia oxygen sensors, are divided into two classes of devices: (1) potentiometric or logarithmic air/fuel sensors; and (2) amperometric or linear air/fuel sensors. The potentiometric sensors are ideally suited to monitor the air-to-fuel ratio close to the complete combustion stoichiometry; a value of about 14.8 to 1 parts by volume. This occurs because the oxygen concentration changes by many orders of magnitude as the air/fuel ratio is varied through the stoichiometric value. However, the potentiometric sensor is not very sensitive to changes in oxygen partial pressure away from the stoichiometric point due to the logarithmic dependence of the output voltage signal on the oxygen partial pressure. It is often advantageous to operate gasoline power piston engines with excess combustion air; this improves fuel economy and reduces hydrocarbon emissions. To maintain stable combustion away from stoichiometry, and enable engines to operate in the excess oxygen (lean burn) region several limiting-current amperometric sensors have been reported. These sensors are based on the electrochemical oxygen ion pumping of a zirconia electrolyte. They typically show reproducible limiting current plateaus with an applied voltage caused by the gas diffusion overpotential at the cathode.

Garzon, F. [Los Alamos National Lab., NM (United States); Miller, C. [General Motors, Flint, MI (United States). GM/Delphi E. Division

1996-12-14T23:59:59.000Z

429

Wireless sensor networks and human comfort index  

Science Conference Proceedings (OSTI)

Conventional wireless home automation networks (WHANs) incorporate embedded wireless sensors and actuators that monitors and control home living environment. WHAN's primary goal is to maintain user comfort and efficient home management. Conventional ... Keywords: Ambient intelligence, Fuzzy logic, Human comfort, Wireless sensor network

Mohd Izani Rawi, Adnan Al-Anbuky

2013-06-01T23:59:59.000Z

430

Wireless sensor networks for soil science  

Science Conference Proceedings (OSTI)

Wireless sensor networks can revolutionise soil ecology by providing measurements at temporal and spatial granularities previously impossible. This paper presents our first steps towards fulfilling that goal by developing and deploying two experimental ... Keywords: WSNs, environmental monitoring, soil moisture, soil monitoring, soil science, soil temperature, urban forests, web services, wireless networks, wireless sensor networks

Andreas Terzis; Razvan Musaloiu-E.; Joshua Cogan; Katalin Szlavecz; Alexander Szalay; Jim Gray; Stuart Ozer; Chieh-Jan Mike Liang; Jayant Gupchup; Randal Burns

2010-02-01T23:59:59.000Z

431

Sensor fault detection using the Mahalanobis distance  

Science Conference Proceedings (OSTI)

A method is described by which a localized sensor abnormality can be detected using the Mahalanobis distance. The Mahalanobis distance is approximately the weighted distance from the hyperplane formed by the principal components to the particular observation. Qualitatively, the principal components correspond to the physical laws that govern the behavior of the systems and constraints placed on the system. If there are more sensors than principal components, there are redundant measurements. This redundancy can be used to detect abnormalities that are due either to sensor failure or a localized change in the system being measured. The method compares the distribution of the Mahalanobis distance during normal operation with the distribution during the current operation. A likelihood ratio test is then used to determine if a sensor has gone bad or if operations in the reactor are different from normal. The sensor whose value is not normal is identified by comparing Mahalanobis distances computed with one sensor masked. When the abnormal sensor is masked, the Mahalanobis distance for this subset of sensors will be within prespecified bounds. The method is demonstrated on 20 subassembly output thermocouples in the core of Experimental Breeder Reactor II.

White, A.M.; Gross, K.C. (Argonne National Lab., IL (United States)); Kubic, W.L (Los Alamos National Lab., NM (United States))

1993-01-01T23:59:59.000Z

432

Characterization monitoring & sensor technology crosscutting program  

Science Conference Proceedings (OSTI)

The purpose of the Characterization, Monitoring, and Sensor Technology Crosscutting Program (CMST-CP) is to deliver appropriate characterization, monitoring, and sensor technology (CMST) to the OFfice of Waste Management (EM-30), the Office of Environmental Restoration (EM-40), and the Office of Facility Transition and Management (EM-60).

NONE

1996-08-01T23:59:59.000Z

433

Solar Energy Harvesting for Wireless Sensor Networks  

Science Conference Proceedings (OSTI)

The commercially available sensor nodes are battery-driven devices. A number of nodes together constitute a network. As days proceed, the batteries used in the nodes lose their charge and subsequently get isolated from the network. Many energy harvesting ... Keywords: Energy Harvest, Recharging Circuitry, Batteries, Low Power Design, MICAz sensor nodes

P. T. V. Bhuvaneswari; R. Balakumar; V. Vaidehi; P. Balamuralidhar

2009-07-01T23:59:59.000Z

434

Active time scheduling for rechargeable sensor networks  

Science Conference Proceedings (OSTI)

Recent progress in energy harvesting technologies made it possible to build sensor networks with rechargeable nodes which target an indefinitely long operation. In these networks, the goal of energy management is to allocate the available energy such ... Keywords: Energy harvesting, Rechargeable, Sensor network

Volodymyr Pryyma; Damla Turgut; Ladislau Bölöni

2010-03-01T23:59:59.000Z

435

Wireless sensor network operating systems: a survey  

Science Conference Proceedings (OSTI)

The design of operating system for Wireless Sensor Network (WSN) deviates from the traditional operating system design due to their specific characteristics like constrained resources, high dynamics and inaccessible deployment environments. We ... Keywords: TinyOS, WSN operating systems, WSNs, ad-hoc networks, applications, characteristics, classification framework, design, embedded systems, reprogramming, survey, virtual machines, wireless networks, wireless sensor networks

Adi Mallikarjuna V. Reddy; A.V.U. Phani Kumar; D. Janakiram; G. Ashok Kumar

2009-08-01T23:59:59.000Z

436

Sensor array for toxic gas detection  

DOE Patents (OSTI)

A portable instrument for use in the field in detecting and identifying a hazardous component in air or other gas including an array of small sensors which upon exposure to the gas from a pattern of electrical responses, a source of standard response patterns characteristic of various components, and microprocessor means for comparing the sensor-formed response pattern with one or more standard patterns to thereby identify the component on a display. The number of responses may be increased beyond the number of sensors by changing the operating voltage, temperature or other condition associated with one or more sensors to provide a plurality of responses from each of one or more of the sensors. In one embodiment, the instrument is capable of identifying anyone of over 50-100 hazardous components.

Stetter, Joseph R. (Naperville, IL); Zaromb, Solomon (Hinsdale, IL); Penrose, William R. (Naperville, IL)

1987-01-01T23:59:59.000Z

437

Wireless Sensor Network for Improving the Energy Efficiency of...  

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

032012 Publisher Lawrence Berkeley National Laboratory City Berkeley Keywords data center, energy efficiency, energy efficiency of data, Wireless sensor, Wireless sensor...

438

Advanced Sensor Approaches for Monitoring and Control of Gas...  

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

Contract Value (327,501 DOE) Advanced Sensor Approaches For Monitoring and Control Of Gas Turbine Combustors Georgia Institute of Technology JSTL 101905 Advanced Sensors 10...

439

Battery Allocation for Maximizing Lifetime of Wireless Sensor Networks.  

E-Print Network (OSTI)

??Wireless sensor network has been an area of interest among researchers. Designing a wireless sensor network involves multiple issues such as size and processing capacity… (more)

Khambete, Ketki

2010-01-01T23:59:59.000Z

440

Power-Rate-Distortion Analysis Of Wireless Visual Sensor Network.  

E-Print Network (OSTI)

??The emergence of low-cost and mature technologies in wireless communication, visual sensor devices, and digtial signal processing, facilitates the potential of wirelss sensor networks (WSN).… (more)

Shaw, William

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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

Evaluation of Power Conservation Algorithms in Industrial Wireless Sensor Networks.  

E-Print Network (OSTI)

??Sensors play a prominent role in the industrialized society of today and a world without sensors is inconceivable as most of the electronic applications are… (more)

Garlapati, Naveen

2012-01-01T23:59:59.000Z

442

New and Underutilized Technology: HVAC Occupancy Sensors | Department...  

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

HVAC Occupancy Sensors New and Underutilized Technology: HVAC Occupancy Sensors October 4, 2013 - 4:20pm Addthis The following information outlines key deployment considerations...

443

Exact and Heuristic Approaches for Directional Sensor Control  

E-Print Network (OSTI)

Aug 29, 2013 ... The Directional Sensor Control problem (DSCP) consists in assigning a direction of view to each sensor. The location of the targets is known ...

444

Sensor-Based Information Appliances  

E-Print Network (OSTI)

Pervasive Computing is the main characteristic of the emerging fourth era of computer evolution. The paper discusses features of a new generation of intelligent sensor-based information appliances for distributed heterogeneous real-time applications. These appliances will be found in the intelligent homes, offices, automobiles and cities of the future. They will also offer higher mobility and convenience to professionals and open new avenues to many industrial and health applications. 1. Introduction Since its emergence, some forty years go, computing industry has passed through a rapid sequence of technological phases: central computing/mainframe (1950s-1980s), personal computer/PC (1980s-...), computer networks (1990s -...). A fourth era is emerging now, when computers become pervasive, i.e. a technology more noticeable by its absence than its presence [1], [6], [11], [14], [17], [22], [25]. The first mass-produced pervasive computing devices are starting to appear. The Clarion Au...

Emil M. Petriu; Nicolas D. Georganas; Dorina C. Petriu; Dimitrios Makrakis; Voicu Z. Groza

2000-01-01T23:59:59.000Z

445

Electrochemical NOx Sensor for Monitoring Diesel Emissions  

Science Conference Proceedings (OSTI)

Increasingly stringent emissions regulations will require the development of advanced gas sensors for a variety of applications. For example, compact, inexpensive sensors are needed for detection of regulated pollutants, including hydrocarbons (HCs), CO, and NO{sub x}, in automotive exhaust. Of particular importance will be a sensor for NO{sub x} to ensure the proper operation of the catalyst system in the next generation of diesel (CIDI) automobiles. Because many emerging applications, particularly monitoring of automotive exhaust, involve operation in harsh, high-temperature environments, robust ceramic-oxide-based electrochemical sensors are a promising technology. Sensors using yttria-stabilized zirconia (YSZ) as an oxygen-ion-conducting electrolyte have been widely reported for both amperometric and potentiometric modes of operation. These include the well-known exhaust gas oxygen (EGO) sensor. More recently, ac impedance-based (i.e., impedance-metric) sensing techniques using YSZ have been reported for sensing water vapor, hydrocarbons, CO, and NO{sub x}. Typically small-amplitude alternating signal is applied, and the sensor response is measured at a specified frequency. Most impedance-metric techniques have used the modulus (or magnitude) at low frequencies ( 600 C, and thermodynamic calculations predict {approx}90% NO, balance NO{sub 2}. Since automotive exhaust sensors will probably be required to operate at temperatures > 600 C, NO is the dominant component in thermodynamic equilibrium and the target NOx species. Also, the use of upstream catalysts could further promote the conversion of NO{sub x} species to NO. Therefore, the focus of current work is to investigate the response to NO. Nevertheless, minimizing the sensitivity to a variety of competing species is important in order to obtain the accuracy necessary for achieving the emission limits. Mitigating the effect of interfering gases (e.g., O{sub 2}, water vapor, HCs, etc.) is an area of current study. For impedance metric NO{sub x} sensors, our previous work has demonstrated that the cross-sensitivity to O{sub 2} may be accounted for by comparing measurements at multiple frequencies. Other strategies for compensation are also being explored, including calibration using data from existing sensors located nearby. Our current work has made significant advances in terms of developing prototype sensors more suitable for commercialization. Also, dynamometer testing has provided real-world sensor performance data that will be useful in approaching potential suppliers to whom we can transfer the technology for commercialization. The advances are a direct result of understanding the sensing mechanisms responsible for impedance-based NO{sub x} sensing and the effect of materials choice and sensor design/geometry.

Woo, L Y; Glass, R S

2008-11-14T23:59:59.000Z

446

Interpreting motion events of pairs of moving objects  

Science Conference Proceedings (OSTI)

When accumulating large quantities of positional data with ubiquitous positioning techniques, methods are required that can efficiently make use of these data. This work proposes a representation that approximates motion events of pairs of objects. It ... Keywords: Change in direction, Motion events/patterns, Spatiotemporal reasoning

Björn Gottfried

2011-04-01T23:59:59.000Z

447

Investigation on Virtual Assembly and Motion Simulation of Scroll Compressor  

Science Conference Proceedings (OSTI)

It is efficient and economic to excogitate new product of a scroll compressor by means of virtual design. It accords with development and requirement of scroll compressors products currently. Virtual assembly and motion simulation is important process ... Keywords: scroll compressor, virtual assembly, assembly scheme, motion simulation

Haisheng Li; Yinghua Chen

2010-11-01T23:59:59.000Z

448

Programmable motion and patterning of molecules on solid surfaces  

E-Print Network (OSTI)

) Adsorbed on a solid surface, a molecule can migrate and carry an electric dipole moment. A nonuniform electric field can direct the motion of the molecule. A collection of the same molecules may aggregate and programmable molec- ular cars. This paper develops a phase field model to simulate the molecular motion

Suo, Zhigang

449

Motion capture system using single-track gray code  

Science Conference Proceedings (OSTI)

In this paper, we describe a high speed optical motion capture method that has a simple mechanism. We use a light shielding filter using a pattern of Single-Track Gray Code (STGC) [1] absolute encoder to take location of IR light marker tags instead ... Keywords: infrared light, motion capture, single-track gray code

Tomoko Fujii; Hideaki Nii; Takuji Tokiwa; Maki Sugimoto; Masahiko Inami

2008-12-01T23:59:59.000Z

450

Motion Estimation of Articulated Objects from Perspective Views  

Science Conference Proceedings (OSTI)

Motion estimation of articulated objects with two subparts from monocular images are studied in this paper for three cases: 1) one subpart translates, and the other one rotates around the joint; 2) the two rotation axes of the subparts are parallel to ... Keywords: articulated object, joint, motion estimation, point correspondence

Xiaoyun Zhang; Yuncai Liu; Thomas S. Huang

2002-11-01T23:59:59.000Z

451

Energy of tsunami waves generated by bottom motion  

E-Print Network (OSTI)

generation models. Theoretical and Computational Fluid Dynamics, 21:245­269, 2007. Z. Kowalik, W. Knight, TEnergy of tsunami waves generated by bottom motion By Denys Dutykh, Fr´ed´eric Dias CMLA, ENS investigation on the energy of waves generated by bottom motion is performed here. We start with the full

Paris-Sud XI, Université de

452

Vertical Motion in the Gulf Stream Near 68°W  

Science Conference Proceedings (OSTI)

The authors compute and compare vertical motions from three different data sources within a 300-km square domain centered in the Gulf Stream near 38°N, 68°W, and show that vertical motions inferred from all three independent data sources and ...

Scott S. Lindstrom; D. Pandolph Watts

1994-11-01T23:59:59.000Z

453

Underwater Human-Robot Interaction via Biological Motion Identification  

E-Print Network (OSTI)

Underwater Human-Robot Interaction via Biological Motion Identification Junaed Sattar and Gregory: {junaed, dudek}@cim.mcgill.ca Abstract-- We present an algorithm for underwater robots to visually detect pertaining to biological motion. This technique is applied to track scuba divers in underwater domains

Dudek, Gregory

454

Integrative path planning and motion control for handling large components  

Science Conference Proceedings (OSTI)

For handling large components a large workspace and high precision are required. In order to simplify the path planning for automated handling systems, this task can be divided into global, regional and local motions. Accordingly, different types of ... Keywords: integrative production, motion control, path planning, robotic assembly application

Rainer Müller; Martin Esser; Markus Janssen

2011-12-01T23:59:59.000Z

455

Method and apparatus for planning motions of robot manipulators  

SciTech Connect

Method and apparatus for automatically planning motions of robot manipulators. The invention rapidly finds a collision-free path in a cluttered robot environment, if one exists, from any starting configuration of the robot manipulator to any ending configuration. The time to solution of a motion planning problem is not uniform, but proportional to the complexity of the problem.

Chen, Pang C. (4000 Camino De La Sierra, N.E., Albuquerque, NM 87111); Hwang, Yong K. (9036 Walter Bambrook, N.E., Albuquerque, NM 87122)

1996-01-01T23:59:59.000Z

456

Ground Motion Studies at NuMI  

Science Conference Proceedings (OSTI)

Ground motion can cause significant deterioration in the luminosity of a linear collider. Vibration of numerous focusing magnets causes continuous misalignments, which makes the beam emittance grow. For this reason, understanding the seismic vibration of all potential LC sites is essential and related efforts in many sites are ongoing. In this document we summarize the results from the studies specific to Fermilab grounds as requested by the LC project leader at FNAL, Shekhar Mishra in FY04-FY06. The Northwestern group focused on how the ground motion effects vary with depth. Knowledge of depth dependence of the seismic activity is needed in order to decide how deep the LC tunnel should be at sites like Fermilab. The measurements were made in the NuMI tunnel, see Figure 1. We take advantage of the fact that from the beginning to the end of the tunnel there is a height difference of about 350 ft and that there are about five different types of dolomite layers. The support received allowed to pay for three months of salary of Michal Szleper. During this period he worked a 100% of his time in this project. That include one week of preparation: 2.5 months of data taking and data analysis during the full period of the project in order to guarantee that we were recording high quality data. We extended our previous work and made more systematic measurements, which included detailed studies on stability of the vibration amplitudes at different depths over long periods of time. As a consequence, a better control and more efficient averaging out of the daytime variation effects were possible, and a better study of other time dependences before the actual depth dependence was obtained. Those initial measurements were made at the surface and are summarized in Figure 2. All measurements are made with equipment that we already had (two broadband seismometers KS200 from GEOTECH and DL-24 portable data recorder). The offline data analysis took advantage of the full Fourier spectra information and the noise was properly subtracted. The basic formalism is summarized if Figure 3. The second objective was to make a measurement deeper under ground (Target hall, Absorber hall and Minos hall - 150 ft to 350 ft), which previous studies did not cover. All results are summarized in Figure 3 and 4. The measurements were covering a frequency range between 0.1 to 50 Hz. The data was taken continuously for at least a period of two weeks in each of the locations. We concluded that the dependence on depth is weak, if any, for frequencies above 1 Hz and not visible at all at lower frequencies. Most of the attenuation (factor of about 2-3) and damping of ground motion that is due to cultural activity at the surface is not detectable once we are below 150 ft underground. Therefore, accelerator currently under consideration can be build at the depth and there is no need to go deeper underground is built at Fermi National Laboratory.

Mayda M. Velasco; Michal Szleper

2012-02-20T23:59:59.000Z

457

ARM - Evaluation Product - KAZR and MWACR Ship Motion Corrections  

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

ProductsKAZR and MWACR Ship Motion Corrections ProductsKAZR and MWACR Ship Motion Corrections Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : KAZR and MWACR Ship Motion Corrections 2012.09.22 - 2013.01.08 Site(s) MAG General Description The second ARM mobile facility has been configured to take advantage of ship-board deployments. At issue is how the motion at sea during these deployments affects the vertically-pointing cloud radars. Two radars of this type - the Ka-band ARM Zenith Radar (KAZR) and the Marine W-band ARM Cloud Radar (MWACR) - are instruments used in ARM's first ship-based field campaign. Each of these radars requires post-processing to account for the ship's motion across the open ocean. The primary adjustments that must be

458

OpenEI:Projects/Motion Charts | Open Energy Information  

Open Energy Info (EERE)

Charts Charts Jump to: navigation, search Contents 1 Motion Chart Creation for OpenEI Admin 2 Setting up the Data and Getting Embed Code 3 Create Your OpenEI Widget 4 Finish the Widget 5 Finished Product Motion Chart Creation for OpenEI Admin If you are an OpenEI administrator and are interested in creating a motion chart widget, you've come to the right place! Setting up the Data and Getting Embed Code The basic information about organizing your data, using Google Docs and Google's motion chart, and getting the embed code (Steps 1 to 3) is available here:Help:Motion_Chart The next steps are: Create Your OpenEI Widget Now that you have your code, its time to set-up your widget: Log-in at OpenEI In the search box, type Widget:Example and replace example with the name of your widget

459

ARM - Evaluation Product - Vertical Air Motion during Large-Scale  

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

ProductsVertical Air Motion during Large-Scale ProductsVertical Air Motion during Large-Scale Stratiform Rain Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Vertical Air Motion during Large-Scale Stratiform Rain Site(s) NIM SGP General Description The Vertical Air Motion during Large-Scale Stratiform Rain (VERVELSR) value-added product (VAP) uses the unique properties of a 95-GHz radar Doppler velocity spectra to produce vertical profiles of air motion during low-to-moderate (1-20 mm/hr) rainfall events It is designed to run at ARM sites that include a W-band ARM cloud radar (WACR) radar with spectra data processing. The VERVELSR VAP, based on the work of Giangrande et al. (2010), operates by exploiting a resonance effect that occurs in

460

Motion Planning for a Direct Metal Deposition Rapid Prototyping System  

SciTech Connect

A motion planning strategy was developed and implemented to generate motion control instructions from solid model data for controlling a robotically driven solid free-form fabrication process. The planning strategy was tested using a PUMA type robot arm integrated into a LENS{trademark} (Laser Engineered Net Shape) system. Previous systems relied on a series of x, y, and z stages, to provide a minimal coordinated motion control capability. This limited the complexity of geometries that could be constructed. With the coordinated motion provided by a robotic arm, the system can produce three dimensional parts by ''writing'' material onto any face of existing material. The motion planning strategy relied on solid model geometry evaluation and exploited robotic positioning flexibility to allow the construction of geometrically complex parts. The integration of the robotic manipulator into the LENS{trademark} system was tested by producing metal parts directly from CAD models.

AMES,ARLO L.; HENSINGER,DAVID M.; KUHLMANN,JOEL L.

1999-10-18T23:59:59.000Z

Note: This page contains sample records for the topic "timer motion sensor" 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.


461

Building Technologies Office: Sensors and Controls Research  

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

Sensors and Controls Research Sensors and Controls Research The Emerging Technologies team conducts research into technologies related to building sensors and controls. They work with building systems-such as a heating, ventilation, and air conditioning (HVAC) systems-to analyze energy use and help occupants manage energy costs. Building controls have the potential to reduce building energy consumption by monitoring variables and other inputs, and then automatically responding in a predetermined fashion. Research between the Department of Energy, industry, and laboratories focuses on: Sensors Photo of a ceiling-mounted fire sprinkler. Sensors are designed to help building owners and operators better manage their energy use through automation. Sensors measure predefined variables, such as the amount of natural light coming in through an office window, and then feed this data into a building's control system. The control can then respond by adjusting the various building systems. For example, sensors may note when a person leaves a room and let controls know to turn off the lights, or can ensure that faucets only release water if someone's hand is waved.

462

Thin Silicon MEMS Contact-Stress Sensor  

SciTech Connect

This work offers the first, thin, MEMS contact-stress (CS) sensor capable of accurate in situ measruement of time-varying, contact-stress between two solid interfaces (e.g. in vivo cartilage contact-stress and body armor dynamic loading). This CS sensor is a silicon-based device with a load sensitive diaphragm. The diaphragm is doped to create piezoresistors arranged in a full Wheatstone bridge. The sensor is similar in performance to established silicon pressure sensors, but it is reliably produced to a thickness of 65 {micro}m. Unlike commercial devices or other research efforts, this CS sensor, including packaging, is extremely thin (< 150 {micro}m fully packaged) so that it can be unobtrusively placed between contacting structures. It is built from elastic, well-characterized materials, providing accurate and high-speed (50+ kHz) measurements over a potential embedded lifetime of decades. This work explored sensor designs for an interface load range of 0-2 MPa; however, the CS sensor has a flexible design architecture to measure a wide variety of interface load ranges.

Kotovsky, J; Tooker, A; Horsley, D A

2009-12-07T23:59:59.000Z

463

Modeling a Sensor to Improve its Efficacy  

E-Print Network (OSTI)

Robots rely on sensors to provide them with information about their surroundings. However, high-quality sensors can be extremely expensive and cost-prohibitive. Thus many robotic systems must make due with lower-quality sensors. Here we demonstrate via a case study how modeling a sensor can improve its efficacy when employed within a Bayesian inferential framework. As a test bed we employ a robotic arm that is designed to autonomously take its own measurements using an inexpensive LEGO light sensor to estimate the position and radius of a white circle on a black field. The light sensor integrates the light arriving from a spatially distributed region within its field of view weighted by its Spatial Sensitivity Function (SSF). We demonstrate that by incorporating an accurate model of the light sensor SSF into the likelihood function of a Bayesian inference engine, an autonomous system can make improved inferences about its surroundings. The method presented here is data-based, fairly general, and made with plu...

Malakar, N K; Knuth, K H

2013-01-01T23:59:59.000Z

464

Development of Low-cost Hydrogen Sensors  

DOE Green Energy (OSTI)

This research was aimed at understanding and improving the speed and reproducibility of our resistive hydrogen sensor, along with complementary efforts in manufacturability and further design improvements. Maskworks were designed to allow for the printing and firing of multi-sensor layouts (15 per substrate) and a large batch of these sensors was produced using standard thick-film manufacturing lines. Piece-to-piece variations of both the as-made resistance and the response of these sensors to hydrogen were within acceptable tolerances, and the sensor design has now been released for commercial prototyping. Automated testing was begun in order to develop long-term performance data. Dynamic response of selected sensors was measured before and after exposures to methane, hydrogen sulfide, and carbon monoxide, in order to assess the effects of interference gases and surface poisoning. As expected, H{sub 2}S degrades the sensor somewhat, whereas CH{sub 4} and CO do not create significant interference when air is present.

Lauf, R.J.

2001-09-25T23:59:59.000Z

465

Intrinsic Motions Along an Enzymatic Reaction Trajectory  

SciTech Connect

The mechanisms by which enzymes achieve extraordinary rate acceleration and specificity have long been of key interest in biochemistry. It is generally recognized that substrate binding coupled to conformational changes of the substrate-enzyme complex aligns the reactive groups in an optimal environment for efficient chemistry. Although chemical mechanisms have been elucidated for many enzymes, the question of how enzymes achieve the catalytically competent state has only recently become approachable by experiment and computation. Here we show crystallographic evidence for conformational substates along the trajectory towards the catalytically competent 'closed' state in the ligand-free form of the enzyme adenylate kinase. Molecular dynamics simulations indicate that these partially closed conformations are sampled in nanoseconds, whereas nuclear magnetic resonance and single-molecule fluorescence resonance energy transfer reveal rare sampling of a fully closed conformation occurring on the microsecond-to-millisecond timescale. Thus, the larger-scale motions in substrate-free adenylate kinase are not random, but preferentially follow the pathways that create the configuration capable of proficient chemistry. Such preferred directionality, encoded in the fold, may contribute to catalysis in many enzymes.

Henzler-Wildman,K.; Thai, V.; Lei, M.; Ott, M.; Wolf-Watz, M.; Fenn, T.; Pozharski, E.; Wilson, M.; Petsko, G.; et al

2007-01-01T23:59:59.000Z

466

Atomic Models for Motional Stark Effects Diagnostics  

DOE Green Energy (OSTI)

We present detailed atomic physics models for motional Stark effects (MSE) diagnostic on magnetic fusion devices. Excitation and ionization cross sections of the hydrogen or deuterium beam traveling in a magnetic field in collisions with electrons, ions, and neutral gas are calculated in the first Born approximation. The density matrices and polarization states of individual Stark-Zeeman components of the Balmer {alpha} line are obtained for both beam into plasma and beam into gas models. A detailed comparison of the model calculations and the MSE polarimetry and spectral intensity measurements obtained at the DIII-D tokamak is carried out. Although our beam into gas models provide a qualitative explanation for the larger {pi}/{sigma} intensity ratios and represent significant improvements over the statistical population models, empirical adjustment factors ranging from 1.0-2.0 must still be applied to individual line intensities to bring the calculations into full agreement with the observations. Nevertheless, we demonstrate that beam into gas measurements can be used successfully as calibration procedures for measuring the magnetic pitch angle through {pi}/{sigma} intensity ratios. The analyses of the filter-scan polarization spectra from the DIII-D MSE polarimetry system indicate unknown channel and time dependent light contaminations in the beam into gas measurements. Such contaminations may be the main reason for the failure of beam into gas calibration on MSE polarimetry systems.

Gu, M F; Holcomb, C; Jayakuma, J; Allen, S; Pablant, N A; Burrell, K

2007-07-26T23:59:59.000Z

467

Bubble oscillations and motion under vibration  

E-Print Network (OSTI)

Bubbles under vibration can behave in unusual ways, e.g., moving downward against the force of buoyancy. While the bubble downward motion due to the Bjerknes force is well known at acoustic frequencies close to the bubble resonant frequency, these experiments demonstrate that these effects can be observed at relatively low frequencies as well. Experiments were performed in a thin, quasi-two-dimensional rectangular acrylic box partially filled with 20-cSt PDMS silicone oil with overlying ambient air. The apparatus was subjected to sinusoidal axial vibration that produced breakup of the gas-liquid free surface, producing liquid jets into the air, droplets pinching off from these jets, gas cavities in the liquid from impacts of these droplets, and bubble transport below the interface. Vibration conditions for the attached videos are 280 Hz frequency, 15 g acceleration, and 94 micron peak-to-peak displacement. Behaviors shown in the videos include the following. 1. Free surface breakup into jets and droplets, and...

O'Hern, Tim; Torczynski, John

2011-01-01T23:59:59.000Z

468

Wireless Sensors Improve Data Center Efficiency  

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

Wireless Sensor Wireless Sensor Technology Overview In most buildings, space conditions are controlled and coordinated by a building automation system (BAS). A BAS can provide temperature visualization information with dashboard displays through a person-machine interface (PMI). However, in most data centers, space conditioning is achieved with multiple, independently-operating cooling units located within the space. Unfortunately, these data centers do not have adequate auto- mation systems or visualization tools to monitor or manage these cooling units efficiently. In 2001, an emerging technology was demonstrated at University of California, Davis by Dr. Raju Pandey that "meshed" temperature sensors into a network using wireless fidelity (Wi-Fi

469

Hydrogen gas sensor and method of manufacture  

DOE Patents (OSTI)

A sensor for measuring the pressure of hydrogen gas in a nuclear reactor, and method of manufacturing the same. The sensor comprises an elongated tube of hydrogen permeable material which is connected to a pressure transducer through a feedthrough tube which passes through a wall at the boundary of the region in which hydrogen is present. The tube is pressurized and flushed with hydrogen gas at an elevated temperature during the manufacture of the sensor in order to remove all gasses other than hydrogen from the device.

McKee, John M. (Hinsdale, IL)

1991-01-01T23:59:59.000Z

470

Underwater Acoustic Sensor Networks: Research Challenges  

E-Print Network (OSTI)

Underwater sensor nodes will find applications in oceanographic data collection, pollution monitoring, o#shore exploration, disaster prevention, assisted navigation and tactical surveillance applications. Moreover, unmanned or autonomous underwater vehicles (UUVs, AUVs), equipped with sensors, will enable the exploration of natural undersea resources and gathering of scientific data in collaborative monitoring missions. Underwater acoustic networking is the enabling technology for these applications. Underwater networks consist of a variable number of sensors and vehicles that are deployed to perform collaborative monitoring tasks over a given area.

Ian Akyildiz Dario; Ian F. Akyildiz; Dario Pompili; Tommaso Melodia

2005-01-01T23:59:59.000Z

471

Underwater Acoustic Sensor Networks: Research Challenges  

E-Print Network (OSTI)

Underwater sensor nodes will find applications in oceanographic data collection, pollution monitoring, o#shore exploration, disaster prevention, assisted navigation and tactical surveillance applications. Moreover, unmanned or autonomous underwater vehicles (UUVs, AUVs), equipped with sensors, will enable the exploration of natural undersea resources and gathering of scientific data in collaborative monitoring missions. Underwater acoustic networking is the enabling technology for these applications. Underwater networks consist of a variable number of sensors and vehicles that are deployed to perform collaborative monitoring tasks over a given area. In this

Ian F. Akyildiz; Dario Pompili; Tommaso Melodia

2005-01-01T23:59:59.000Z

472

Integrated optical tamper sensor with planar waveguide  

DOE Patents (OSTI)

A monolithic optical tamper sensor, comprising an optical emitter and detector, connected by an optical waveguide and placed into the critical entry plane of an enclosed sensitive region, the tamper sensor having a myriad of scraps of a material optically absorbent at the wavelength of interest, such that when the absorbent material is in place on the waveguide, an unique optical signature can be recorded, but when entry is attempted into the enclosed sensitive region, the scraps of absorbent material will be displaced and the optical/electrical signature of the tamper sensor will change and that change can be recorded.

Carson, R.F.; Casalnuovo, S.A.

1993-01-05T23:59:59.000Z

473

Development of Advanced Massive Heterogeneous Sensor Networks  

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

Advanced Massive Heterogeneous Sensor Networks Research Team * Doug McCorkle * Kris Bryden * Mark Bryden Ames Laboratory U of Maryland * Ashwani Gupta * Miao Yu Power Plant Challenges * Conflicting goals of reliable low cost energy and climate change mitigation * Large investment in current infrastructure * Little implementation of information technologies Sensors ... * will be "free" * will be small (lick 'n stick) * will be smart * will be ubiquitous Low cost improvements in sensing for control and condition monitoring can result in big improvements in cost and carbon emissions * "... develop the understandings, algorithms, and control strategies needed to utilize large-scale, high- density sensor networks in advanced power plants." * Develop techniques for the

474

Special Sensor Microwave/Imager (SSM/I) and Special Sensor Microwave Imager  

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

Special Sensor Microwave/Imager (SSM/I) and Special Sensor Microwave Imager Special Sensor Microwave/Imager (SSM/I) and Special Sensor Microwave Imager Sounder (SSMIS) Global Gridded Products Agriculture Community Menu DATA APPS EVENTS DEVELOPER STATISTICS COLLABORATE ABOUT Agriculture You are here Data.gov » Communities » Agriculture » Data Special Sensor Microwave/Imager (SSM/I) and Special Sensor Microwave Imager Sounder (SSMIS) Global Gridded Products Dataset Summary Description The SSM/I products are useful for evaluating the mean climate state, it's interannual and seasonal variations, and the detection of anomalies associated with ENSO and regional climatic variations. The Hydrology Team has assembled a time series of the entire SSM/I archive, now entering it's 16th year, which includes data from July 1987 to the present. Monthly average products are produced for precipitation, cloud liquid water, total precipitable water, snow cover, sea-ice cover, and oceanic surface wind speed.

475

MOCUS: moving object counting using ultrasonic sensor networks  

Science Conference Proceedings (OSTI)

Counting the number of moving objects in a given area has many practical applications. By investigating a series of state-of-the-art technologies, we propose a Moving Object Counting approach using Ultrasonic Sensor networks (MOCUS). ... Keywords: clustering, moving objects, object counting, sensor clusters, ultrasonic sensor networks, ultrasound, wireless networks, wireless sensor networks

Quanbin Chen; Min Gao; Jian Ma; Dian Zhang; Lionel M. Ni; Yunhao Liu

2007-12-01T23:59:59.000Z

476

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

477

Diagnostic Tools for Wireless Sensor Networks: A Comparative Survey  

Science Conference Proceedings (OSTI)

The availability of tools to diagnose Wireless Sensor Network (WSN) failures is a key success factor for this type of networks as already demonstrated by several long-running deployments. By nature, WSNs are resource-constrained, fragile, complex to ... Keywords: Embedded debugging, Sensor diagnosing, Sensor failure, Sensor networks, Testing and debugging

André Rodrigues; Tiago Camilo; Jorge Sá Silva; Fernando Boavida

2013-09-01T23:59:59.000Z

478

Efficient on-demand image transmission in visual sensor networks  

Science Conference Proceedings (OSTI)

In a tracking system, an object of interest is monitored continuously in a sensor network. Information about the object is kept in the sensors and sensors transmit the information upon request. In this paper, we consider the scenario where all sensors ...

Kit-Yee Chow; King-Shan Lui; Edmund Y. Lam

2007-01-01T23:59:59.000Z

479

Mobility limited flip-based sensor networks deployment  

E-Print Network (OSTI)

An important phase of sensor networks operation is deployment of sensors in the field of interest. Critical goals during sensor networks deployment include coverage, connectivity, load balancing etc. A class of work has recently appeared, where mobility in sensors is leveraged to meet deployment objectives. In this paper, we study deployment of sensor networks using mobile sensors. The distinguishing feature of our work is that the sensors in our model have limited mobilities. More specifically, the mobility in the sensors we consider is restricted to a flip, where the distance of the flip is bounded. We call such sensors as flip-based sensors. Given an initial deployment of flip-based sensors in a field, our problem is to determine a movement plan for the sensors in order to maximize the sensor network coverage, and minimize the number of flips. We propose a minimum-cost maximum-flow based solution to this problem. We prove that our solution optimizes both the coverage and the number of flips. We also study the sensitivity of coverage and the number of flips to flip distance under different initial deployment distributions of sensors. We observe that increased flip distance achieves better coverage, and reduces the number of flips required per unit increase in coverage. However, such improvements are constrained by initial deployment distributions of sensors, due to the limitations on sensor mobility.

Xiaole Bai; Bin Ma; Dong Xuan; Changqing Xu

2005-01-01T23:59:59.000Z

480

Sensor Resource Management driven by threat projection and priorities  

Science Conference Proceedings (OSTI)

This paper extends previous Sensor Resource Management (SRM) work by addressing information flow from sensor inputs to SRM, through four levels of the US DoD's Joint Directors of Laboratories (JDL) sensor fusion model. The method flexibly adapts to several ... Keywords: Prioritization, Radar, Sensor Resource Management, Situation Calculus, Threat projection

Joseph Anderson; Lang Hong

2008-04-01T23:59:59.000Z

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481

Cybermussels: a biological sensor network using freshwater mussels  

Science Conference Proceedings (OSTI)

In this paper, we describe our ongoing work on designing an underwater sensor network for monitoring the ecosystem of the Mississippi river using freshwater mussels as biological sensors. One of the most extensive manifestations of anthropogenic mismanagement ... Keywords: bio-sensor, freshwater mussel, wireless sensor network

Henry E. Baidoo-Williams; Jeremy S. Bril; Mehmed B. Diken; Jonathan Durst; Josiah McClurg; Soura Dasgupta; Craig L. Just; Anton Kruger; Raghuraman Mudumbai; Teresa Newton

2012-04-01T23:59:59.000Z

482

Achieving distributed user access control in sensor networks  

Science Conference Proceedings (OSTI)

User access control in sensor networks defines a process of granting user an access right to the stored information. It is essential for future real sensor network deployment in which sensors may provide users with different services in terms of data ... Keywords: Elliptic Curve Cryptography, Public key cryptography, Sensor networks, User access control

Haodong Wang; Qun Li

2012-05-01T23:59:59.000Z

483

Optimized query routing trees for wireless sensor networks  

Science Conference Proceedings (OSTI)

In order to process continuous queries over Wireless Sensor Networks (WSNs), sensors are typically organized in a Query Routing Tree (denoted as T) that provides each sensor with a path over which query results can be transmitted to the querying node. ... Keywords: Critical path method, Query routing trees, Sensor networks

Panayiotis Andreou; Demetrios Zeinalipour-Yazti; Andreas Pamboris; Panos K. Chrysanthis; George Samaras

2011-04-01T23:59:59.000Z

484

Photolithographic patterning of polymer-encapsulated optical oxygen sensors  

Science Conference Proceedings (OSTI)

In this paper we show a novel fabrication process capable of yielding arbitrarily-shaped optical oxygen sensor patterns at micron resolution. The wafer-level process uses a thin-film sacrificial metal layer as intermediate mask, protecting the sensor ... Keywords: Optical oxygen sensor, Photolithography, PtOEPK/PS, Sensor patterning

Volker Nock; Maan Alkaisi; Richard J. Blaikie

2010-05-01T23:59:59.000Z

485

Stream data gathering in wireless sensor networks within expected lifetime  

Science Conference Proceedings (OSTI)

Sensor networks aim at collecting important sensor data for environment monitoring, e-health or hazardous conditions. Some applications do not need sensor networks with a long lifetime, such as monitoring an erupting volcano or monitoring hazardous conditions. ... Keywords: expected lifetime, sensor network, stream data gathering

Lei Shu; Zhangbing zhou; Antonio Aguilar; Manfred Hauswirth

2007-08-01T23:59:59.000Z

486

Sensor Technology Identification, Development, and Implementation for 2003: Smart Sensor for Centrifugal Charging Pump Gearbox  

Science Conference Proceedings (OSTI)

This report is the second report in the series involving the use of a wireless smart sensor to monitor component health in a nuclear power plant. The original report was EPRI report 1006694, "Centrifugal Charging Pump Gearbox Smart Sensor Development." This current report provides details about the installation and operation of the smart sensor centrifugal charging pump (CCP) gearbox health monitoring system at Catawba Nuclear Power Plant during July 2003. Results from the data collected during the perio...

2003-12-08T23:59:59.000Z

487

Definition: Equipment Health Sensor | Open Energy Information  

Open Energy Info (EERE)

Sensor Sensor Jump to: navigation, search Dictionary.png Equipment Health Sensor Monitoring devices that automatically measure and communicate equipment characteristics that are related to the 'health' and maintenance of the equipment. These characteristics can include, but are not limited to temperature, dissolved gas, and loading. These devices can also automatically generate alarm signals if the equipment characteristics reach critical or dangerous levels.[1] Related Terms sustainability References ↑ [www.smartgrid.gov/sites/default/files/pdfs/description_of_assets.pdf SmartGrid.gov 'Description of Assets'] An LikeLike UnlikeLike You like this.Sign Up to see what your friends like. inline Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Equipment_Health_Sensor&oldid=502526

488

Property:Available Sensors | Open Energy Information  

Open Energy Info (EERE)

Sensors Sensors Jump to: navigation, search Property Name Available Sensors Property Type Text Pages using the property "Available Sensors" Showing 25 pages using this property. (previous 25) (next 25) 1 1.5-ft Wave Flume Facility + Flow, Pressure Range(psi), Turbulence, ... 10-ft Wave Flume Facility + Flow, Pressure Range(psi), Turbulence, ... 11-ft Wave Flume Facility + Flow, Pressure Range(psi), Turbulence, ... 2 2-ft Flume Facility + Flow, Pressure Range(psi), Turbulence, ... 3 3-ft Wave Flume Facility + Flow, Pressure Range(psi), Turbulence, ... 5 5-ft Wave Flume Facility + Flow, Pressure Range(psi), Turbulence, ... 6 6-ft Wave Flume Facility + Flow, Pressure Range(psi), Turbulence, ... A Alden Large Flume + Pressure Range(psi), Velocity, Displacement, ...

489

Millimeter wave sensor for monitoring effluents  

DOE Patents (OSTI)

A millimeter-wave sensor for detecting and measuring effluents from processing plants either remotely or on-site includes a high frequency signal source for transmitting frequency-modulated continuous waves in the millimeter or submillimeter range with a wide sweep capability and a computer-controlled detector for detecting a plurality of species of effluents on a real time basis. A high resolution spectrum of an effluent, or effluents, is generated by a deconvolution of the measured spectra resulting in a narrowing of the line widths by 2 or 3 orders of magnitude as compared with the pressure broadened spectra detected at atmospheric pressure for improved spectral specificity and measurement sensitivity. The sensor is particularly adapted for remote monitoring such as where access is limited or sensor cost restricts multiple sensors as well as for large area monitoring under nearly all weather conditions.

Gopalsami, Nachappa (Naperville, IL); Bakhtiari, Sasan (Bolingbrook, IL); Raptis, Apostolos C. (Downers Grove, IL); Dieckman, Stephen L. (Downers Grove, IL)

1995-01-01T23:59:59.000Z

490

Electrochemical Hydrogen Sensor for Safety Monitoring  

DOE Green Energy (OSTI)

A hydrogen safety sensor is presented which provides high sensitivity and fast response time when operated in air. The target application for the sensor is external deployment near systems using or producing high concentrations of hydrogen. The sensor is composed of a catalytically active metal-oxide sensing electrode and a noble metal reference electrode attached to an yttria-stabilized zirconia (YSZ) electrolyte. The sensing approach is based on the difference in oxidation rate of hydrogen on the different electrode materials. Results will be presented for a sensor using a sensing electrode of tin-doped indium oxide (ITO). Response to H{sub 2}, and cross-sensitivity to hydrocarbon and H{sub 2}O are discussed.

Martin, L P; Pham, A-Q; Glass, R S

2003-04-25T23:59:59.000Z

491

Intelligent Lighting System Using Wireless Sensor Networks  

E-Print Network (OSTI)

This paper examines the use of Wireless Sensor Networks interfaced with light fittings to allow for daylight substitution techniques to reduce energy usage in existing buildings. This creates a wire free system for existing buildings with minimal disruption and cost.

Kumaar, A A Nippun; TSB, Sudarshan; 10.5121/ijasuc.2010.1402

2011-01-01T23:59:59.000Z

492

Photonics-based Multi-gas Sensor.  

E-Print Network (OSTI)

??The design of a photonics-based multi-gas sensor is presented. Absorption spectroscopy theory has been analyzed to derive key requirements for effective gas concentration measurements. HITRAN… (more)

Matharoo, Inderdeep

2011-01-01T23:59:59.000Z

493

Structure and yarn sensor for fabric  

DOE Patents (OSTI)

A structure and yarn sensor for fabric directly determines pick density in a fabric thereby allowing fabric length and velocity to be calculated from a count of the picks made by the sensor over known time intervals. The structure and yarn sensor is also capable of detecting full length woven defects and fabric. As a result, an inexpensive on-line pick (or course) density measurement can be performed which allows a loom or knitting machine to be adjusted by either manual or automatic means to maintain closer fiber density tolerances. Such a sensor apparatus dramatically reduces fabric production costs and significantly improves fabric consistency and quality for woven or knitted fabric. 13 figs.

Mee, D.K.; Allgood, G.O.; Mooney, L.R.; Duncan, M.G.; Turner, J.C.; Treece, D.A.

1998-10-20T23:59:59.000Z

494

Green fluorescent protein as a mechanical sensor  

E-Print Network (OSTI)

Inquiry into intracellular and cytoskeletal mechanics requires an intracellular mechanical sensor to verify models of sub-cellular structure dynamics. To this end, the green fluorescent protein (GFP) is considered as a ...

Muso, Taro M. (Taro Michael)

2007-01-01T23:59:59.000Z

495

Solar powered sensor network design and experimentation  

Science Conference Proceedings (OSTI)

As battery capacities are a key limiting factor of wireless sensor networks, harvesting energy from the environment is very attractive. For outdoor applications, solar power seems to be the best suited energy source. However, the amount of energy delivered ...

Daniela Krüger; Carsten Buschmann; Stefan Fischer

2009-09-01T23:59:59.000Z

496

Reflectance based optical fiber chemical sensor  

DOE Patents (OSTI)

A thin film chemical sensor undergoes changes in reflective optical properties when exposed to a chemical species. A thin metal film is deposited at the end of an optical fiber, and exposure of the thin film to the chemical species causes changes in the effective thickness of the thin film, thereby changing its reflective properties. A chemical detection system based on the thin film sensor includes a light source and an optical divider for dividing light from the light source into a first and second light path. The first light path leads to circuitry for providing a reference signal. The thin film chemical sensor receives light from the second light path, and a photoelectric detector detects light reflected from the chemical sensor and provides an electrical signal representative of the reflected light. Circuitry is provided for comparing the reference signal with the reflected light signal, thereby providing a measurement signal indicative of the presence of the chemical species. 5 figs.

Butler, M.A.; Pfeifer, K.B.; Ricco, A.J.

1988-10-18T23:59:59.000Z

497

Team communications among autonomous sensor swarms  

Science Conference Proceedings (OSTI)

In this paper, we consider team (swarm) of unmanned vehicles (UVs) equipped with various sensors (videos, chemicals, etc). Those swarms need efficient communication to feed sensed data, communicate data to other swarms, to navigate and, more generally, ...

Mario Gerla; Yunjung Yi

2004-03-01T23:59:59.000Z

498

Cooperative caching in wireless multimedia sensor networks  

Science Conference Proceedings (OSTI)

The recent advances in miniaturization and the creation of low-power circuits, combined with small-sized batteries have made the development of wireless sensor networks a working reality. Lately, the production of cheap CMOS cameras and microphones gave ...

Nikos Dimokas; Dimitrios Katsaros; Yannis Manolopoulos

2007-08-01T23:59:59.000Z

499

New-generation absolute angle sensors  

Science Conference Proceedings (OSTI)

This paper describes new schemes for absolute angle sensors designed on the modern element base (megapixel CCD- and CMOS-matrices). In these schemes communication between a measured object and a receiving module is organized through an optical channel ...

Yu. A. Grodetskii; Yu. E. Dukarevich; Yu. M. Ivanov

2013-05-01T23:59:59.000Z

500

An Advanced Measurement Concept: The Integrated Sensor  

Science Conference Proceedings (OSTI)

An integrated sensor is a complete measurement system that communicates its signals to a data collection and archival facility. The paper describes the concept, and how it developed from and relates to the more traditional systems. It includes a ...

Julian M. Pike

1986-03-01T23:59:59.000Z