Sample records for active sensors aerial

  1. Remotely deployable aerial inspection using tactile sensors

    SciTech Connect (OSTI)

    MacLeod, C. N.; Cao, J.; Pierce, S. G.; Dobie, G.; Summan, R. [Centre for Ultrasonic Engineering, University of Strathclyde, Glasgow, G1 1XW (United Kingdom); Sullivan, J. C.; Pipe, A. G. [Bristol Robotics Laboratory, University of the West of England, Bristol, BS16 1QY (United Kingdom)

    2014-02-18T23:59:59.000Z

    For structural monitoring applications, the use of remotely deployable Non-Destructive Evaluation (NDE) inspection platforms offer many advantages, including improved accessibility, greater safety and reduced cost, when compared to traditional manual inspection techniques. The use of such platforms, previously reported by researchers at the University Strathclyde facilitates the potential for rapid scanning of large areas and volumes in hazardous locations. A common problem for both manual and remote deployment approaches lies in the intrinsic stand-off and surface coupling issues of typical NDE probes. The associated complications of these requirements are obviously significantly exacerbated when considering aerial based remote inspection and deployment, resulting in simple visual techniques being the preferred sensor payload. Researchers at Bristol Robotics Laboratory have developed biomimetic tactile sensors modelled on the facial whiskers (vibrissae) of animals such as rats and mice, with the latest sensors actively sweeping their tips across the surface in a back and forth motion. The current work reports on the design and performance of an aerial inspection platform and the suitability of tactile whisking sensors to aerial based surface monitoring applications.

  2. APAWSAN: Actor Positioning for Aerial Wireless Sensor and Actor Networks

    E-Print Network [OSTI]

    Turgut, Damla

    to be autonomous during deployment. The recent advances in development of small unmanned aerial vehicles (UAVs stations can improve network performance measures such as energy consumption and traffic load balancing vehicles (UAVs) with built in sensors made it possible to deploy aerial sensor and actor networks

  3. An optical water vapor sensor for unmanned aerial vehicles

    SciTech Connect (OSTI)

    Timothy A. Berkoff; Paul L. Kebabian; Robert A. McClatchy; Charles E. Kolb; Andrew Freedman

    1998-12-01T23:59:59.000Z

    The water vapor sensor developed by Aerodyne Research, based on the optical absorption of light at {approximately}935 nm, has been successfully demonstrated on board the Pacific Northwest National Laboratory's Gulfstream-1 research aircraft during the Department of Energy's ARM Intensive Operations Period in August 1998. Data taken during this field campaign show excellent agreement with a chilled mirror and Lyman-alpha hygrometers and measurements confirm the ability to measure rapid, absolute water vapor fluctuations with a high degree of instrument stability and accuracy, with a noise level as low 10 ppmv (1 Hz measurement bandwidth). The construction of this small, lightweight sensor contains several unique elements which result in several significant advantages when compared to other techniques. First, the low power consumption Argon discharge lamp provides an optical beam at a fixed wavelength without a need for temperature or precision current control. The multi-pass absorption cell developed for this instrument provides a compact, low cost method that can survive deployment in the field. Fiber-optic cables, which are used to convey to light between the absorption cell, light source, and detection modules enable remote placement of the absorption cell from the opto-electronics module. Finally, the sensor does not use any moving parts which removes a significant source of potential malfunction. The result is an instrument which maintained its calibration throughout the field measurement campaign, and was not affected by high vibration and large uncontrolled temperature excursions. We believe that the development of an accurate, fast response water vapor monitor described in this report will open up new avenues of aerial-vehicle-based atmospheric research which have been relatively unexplored due to the lack of suitable low-cost, light-weight instrumentation.

  4. Actor Positioning Based on Molecular Geometry in Aerial Sensor Networks

    E-Print Network [OSTI]

    Turgut, Damla

    as central data collectors, can improve network performance in terms of energy consumption or traffic load Florida Email: {miakbas,gsolmaz,turgut}@eecs.ucf.edu Abstract-- Advances in unmanned aerial vehicle (UAV the collected information and react accordingly. The recent advances in unmanned aerial vehicles (UAVs

  5. Active Control Strategies for Chemical Sensors and Sensor Arrays

    E-Print Network [OSTI]

    Gosangi, Rakesh

    2013-07-17T23:59:59.000Z

    validated on metal-oxide (MOX) sensors. Our results show that the active sensing method obtains better classification performance than passive sensing methods, and also is more robust to additive Gaussian noise in sensor measurements. Second, we consider...

  6. Platforms: Where the sensors are mounted.

    E-Print Network [OSTI]

    Gilbes, Fernando

    over the Sahara On September 18, 1994. #12;14 The sensor detects solar radiation that has been absorbed1 Platforms: Where the sensors are mounted. Sensors: Instruments on the platforms. ETM+ AVIRIS GER 1500 #12;2 Passive Sensors · Aerial Cameras · Visible or Thermal Active Sensors · Microwave (Radar

  7. E-Print Network 3.0 - aerial radiation monitoring Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    pieces... deployed. 12;Multiple Sensors Looking At Earth 12;REMOTE SENSORS Passive Sensors Aerial Cameras... OF REFLECTED RADIATION The sensor detects solar radiation...

  8. Microwave Sensors Active and David G. Long

    E-Print Network [OSTI]

    Long, David G.

    waves up through high energy gamma waves. Microwaves extend over an important part of the elec be classified as either passive (radiometers) or active (radars). Each sensor class provides unique insight instruments can be divided into two broad classes: pas- sive, known as radiometers, and active, known

  9. Active Sensors | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectric Coop,SaveWhiskeyEnergy InformationAclara JumpLogsEnergySensors Jump

  10. Application of active flow control technology in an unmanned aerial vehicle

    E-Print Network [OSTI]

    Gaurav,

    2009-05-15T23:59:59.000Z

    A low speed wind tunnel experimental investigation was conducted to determine the effectiveness of the leading edge pulsed blowing and the trailing edge jet blowing/ Gurney flap on the improvement of aerodynamic performance of an unmanned aerial...

  11. Aerial robotic data acquisition system

    SciTech Connect (OSTI)

    Hofstetter, K.J.; Hayes, D.W.; Pendergast, M.M. [Westinghouse Savannah River Co., Aiken, SC (United States); Corban, J.E. [Guided Systems Technologies, Atlanta, GA (United States)

    1993-12-31T23:59:59.000Z

    A small, unmanned aerial vehicle (UAV), equipped with sensors for physical and chemical measurements of remote environments, is described. A miniature helicopter airframe is used as a platform for sensor testing and development. The sensor output is integrated with the flight control system for real-time, interactive, data acquisition and analysis. Pre-programmed flight missions will be flown with several sensors to demonstrate the cost-effective surveillance capabilities of this new technology.

  12. Title: A Different Approach to Sensor Networking for SHM: Remote Powering and Interrogation with Unmanned Aerial Vehicles

    E-Print Network [OSTI]

    Gupta, Rajesh

    or substations via hopping protocols. This work will present a hybrid approach to sensor array interrogation, and/or type) that attacks structural health assessments in a systematic way (Figure 1). In the last

  13. Active carbon filter health condition detection with piezoelectric wafer active sensors

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    Active carbon filter health condition detection with piezoelectric wafer active sensors Jingjing Chemical Biological Center, 5183 Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS

  14. The Sandia MEMS passive shock sensor : FY07 maturation activities.

    SciTech Connect (OSTI)

    Houston, Jack E.; Blecke, Jill; Mitchell, John Anthony; Wittwer, Jonathan W.; Crowson, Douglas A.; Clemens, Rebecca C.; Walraven, Jeremy Allen; Epp, David S.; Baker, Michael Sean

    2008-08-01T23:59:59.000Z

    This report describes activities conducted in FY07 to mature the MEMS passive shock sensor. The first chapter of the report provides motivation and background on activities that are described in detail in later chapters. The second chapter discusses concepts that are important for integrating the MEMS passive shock sensor into a system. Following these two introductory chapters, the report details modeling and design efforts, packaging, failure analysis and testing and validation. At the end of FY07, the MEMS passive shock sensor was at TRL 4.

  15. Embedded Ultrasonics NDE with Piezoelectric Wafer Active Sensors

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    Embedded Ultrasonics NDE with Piezoelectric Wafer Active Sensors Victor Giurgiutiu Department (NDE) is described. PWAS structure and principle of operation are presented. The interaction between exciting certain Lamb wave modes are identified. Recent trends in guided-wave ultrasonic NDE and damage

  16. Embedded NDE with Piezoelectric Wafer Active Sensors in Aerospace Applications

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    1 Embedded NDE with Piezoelectric Wafer Active Sensors in Aerospace Applications Victor Giurgiutiu (NDE) is explored. Laboratory tests are used to prove that PWAS can satisfactorily perform Lamb wave method. INTRODUCTION Embedded nondestructive evaluation (NDE) is an emerging technology that will allow

  17. Aerial Photography At Nevada Test And Training Range Area (Sabin...

    Open Energy Info (EERE)

    GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Aerial Photography At Nevada Test And Training Range Area (Sabin, Et Al., 2004) Exploration Activity Details Location...

  18. Aerial Photography At Blue Mountain Geothermal Area (Fairbank...

    Open Energy Info (EERE)

    Exploration Activity: Aerial Photography At Blue Mountain Geothermal Area (Fairbank Engineering Ltd, 2003) Exploration Activity Details Location Blue Mountain Geothermal Area...

  19. Active resonant subwavelength grating for scannerless range imaging sensors.

    SciTech Connect (OSTI)

    Kemme, Shanalyn A.; Nellums, Robert O.; Boye, Robert R.; Peters, David William

    2006-11-01T23:59:59.000Z

    In this late-start LDRD, we will present a design for a wavelength-agile, high-speed modulator that enables a long-term vision for the THz Scannerless Range Imaging (SRI) sensor. It takes the place of the currently-utilized SRI micro-channel plate which is limited to photocathode sensitive wavelengths (primarily in the visible and near-IR regimes). Two of Sandia's successful technologies--subwavelength diffractive optics and THz sources and detectors--are poised to extend the capabilities of the SRI sensor. The goal is to drastically broaden the SRI's sensing waveband--all the way to the THz regime--so the sensor can see through image-obscuring, scattering environments like smoke and dust. Surface properties, such as reflectivity, emissivity, and scattering roughness, vary greatly with the illuminating wavelength. Thus, objects that are difficult to image at the SRI sensor's present near-IR wavelengths may be imaged more easily at the considerably longer THz wavelengths (0.1 to 1mm). The proposed component is an active Resonant Subwavelength Grating (RSG). Sandia invested considerable effort on a passive RSG two years ago, which resulted in a highly-efficient (reflectivity greater than gold), wavelength-specific reflector. For this late-start LDRD proposal, we will transform the passive RSG design into an active laser-line reflector.

  20. Ferroelectric Thin-Film Active Sensors for Structural Health , Victor Giurgiutiu1

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    , Structural health monitoring 1. INTRODUCTION 1.1 Background Piezoelectric wafer active sensors have beenFerroelectric Thin-Film Active Sensors for Structural Health Monitoring Bin Lin1 , Victor laboratory, Penn State University, University Park, PA 16802 ABSTRACT Piezoelectric wafer active sensors

  1. Activity recognition with end-user sensor installation in the home

    E-Print Network [OSTI]

    Rockinson, Randy Joseph

    2008-01-01T23:59:59.000Z

    In this work, a system for recognizing activities in the home setting that uses a set of small and simple state-change sensors, machine learning algorithms, and electronic experience sampling is introduced. The sensors are ...

  2. Aerial Measuring System

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1991-09-20T23:59:59.000Z

    To establish policy for the Department of Energy's (DOE) Aerial Measuring System (AMS) Program. This directive does not cancel another directive. Canceled by DOE O 153.1.

  3. A CMOS Active Pixel Sensor for Charged Particle Detection

    SciTech Connect (OSTI)

    Matis, Howard S.; Bieser, Fred; Kleinfelder, Stuart; Rai, Gulshan; Retiere, Fabrice; Ritter, Hans George; Singh, Kunal; Wurzel, Samuel E.; Wieman, Howard; Yamamoto, Eugene

    2002-12-02T23:59:59.000Z

    Active Pixel Sensor (APS) technology has shown promise for next-generation vertex detectors. This paper discusses the design and testing of two generations of APS chips. Both are arrays of 128 by 128 pixels, each 20 by 20 {micro}m. Each array is divided into sub-arrays in which different sensor structures (4 in the first version and 16 in the second) and/or readout circuits are employed. Measurements of several of these structures under Fe{sup 55} exposure are reported. The sensors have also been irradiated by 55 MeV protons to test for radiation damage. The radiation increased the noise and reduced the signal. The noise can be explained by shot noise from the increased leakage current and the reduction in signal is due to charge being trapped in the epi layer. Nevertheless, the radiation effect is small for the expected exposures at RHIC and RHIC II. Finally, we describe our concept for mechanically supporting a thin silicon wafer in an actual detector.

  4. Aerial Photography At Roosevelt Hot Springs Geothermal Area ...

    Open Energy Info (EERE)

    Exploration Technique Aerial Photography Activity Date 1975 - 1975 Usefulness useful DOE-funding Unknown Exploration Basis Petersen, C.A. Masters Thesis at the University of Utah...

  5. A Wearable Sensor for Unobtrusive, Long-Term Assessment of Electrodermal Activity

    E-Print Network [OSTI]

    Poh, Ming-Zher

    Electrodermal activity (EDA) is a sensitive index of sympathetic nervous system activity. Due to the lack of sensors that can be worn comfortably during normal daily activity and over extensive periods of time, research ...

  6. Adaptive Sensor Activity Scheduling in Distributed Sensor Networks: A Statistical Mechanics Approach

    E-Print Network [OSTI]

    Ray, Asok

    of spatial-temporal events. The sensor network is modeled as a Markov random field on a graph, where concepts and wireless communications have enabled usage of inexpensive and miniaturized sensor nodes [1­3] that can #12;Effective use of sensor networks requires resource-aware operation; once deployed, energy sources

  7. Aerial Work Platform Safety Program

    E-Print Network [OSTI]

    Holland, Jeffrey

    Aerial Work Platform Safety Program Updated: July 22, 2013 #12;Aerial Work Platform Safety Program ..........................................................................................................11 #12;Aerial Work Platform Safety Program 1 The official version of this information will only for establishing and maintaining the Aerial Work Platform Safety Program. Appropriate safety equipment (e

  8. CMOS Photodiodes with Substrate Openings for Higher Conversion Gain in Active Pixel Sensors

    E-Print Network [OSTI]

    Hornsey, Richard

    1 CMOS Photodiodes with Substrate Openings for Higher Conversion Gain in Active Pixel Sensors J. S' in photodiodes used in active pixel sensor. The discussion is based on experimental data from contact diffusion (n+ pepi) photodiodes fabricated on a standard 0.35 µm CMOS technology. I. Introduction The readout

  9. Active Sensor Wave Propagation Health Monitoring of Beam and Plate Structures

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    1 Active Sensor Wave Propagation Health Monitoring of Beam and Plate Structures Victor Giurgiutiu, Jingjing Bao, Wei Zhao University of South Carolina ABSTRACT Active sensor wave propagation technique is a relatively new method for in-situ nondestructive evaluation (NDE). Elastic waves propagating in material

  10. Propagation of guided Lamb waves in bonded specimens using piezoelectric wafer active sensors

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    Propagation of guided Lamb waves in bonded specimens using piezoelectric wafer active sensors and principles used for generation and propagation of ultrasonic guided waves (Lamb waves) using piezoelectric wafer active sensors (PWAS). Keywords: Ultrasonic, Lamb waves, Damage detection, NDE, Wave propagation

  11. Alzheimer's patient activity assessment using different sensors Carlos Fernando Crispim-Junior1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    activity assessment for the estimation of older people performance in instrumental activities of daily trials on the evaluation of older people motor functions2-3 . The patients wore a chest or wrist sensor

  12. Thin n-in-p planar pixel sensors and active edge sensors for the ATLAS upgrade at HL-LHC

    E-Print Network [OSTI]

    S. Terzo; A. Macchiolo; R. Nisius; B. Paschen

    2014-11-20T23:59:59.000Z

    Silicon pixel modules employing n-in-p planar sensors with an active thickness of 200 $\\mu$m, produced at CiS, and 100-200 $\\mu$m thin active/slim edge sensor devices, produced at VTT in Finland have been interconnected to ATLAS FE-I3 and FE-I4 read-out chips. The thin sensors are designed for high energy physics collider experiments to ensure radiation hardness at high fluences. Moreover, the active edge technology of the VTT production maximizes the sensitive region of the assembly, allowing for a reduced overlap of the modules in the pixel layer close to the beam pipe. The CiS production includes also four chip sensors according to the module geometry planned for the outer layers of the upgraded ATLAS pixel detector to be operated at the HL-LHC. The modules have been characterized using radioactive sources in the laboratory and with high precision measurements at beam tests to investigate the hit efficiency and charge collection properties at different bias voltages and particle incidence angles. The performance of the different sensor thicknesses and edge designs are compared before and after irradiation up to a fluence of $1.4\\times10^{16}n_{eq}/cm^{2}$.

  13. Unmanned Aerial Vehicle Instrumentation for Rapid Aerial Photo System

    E-Print Network [OSTI]

    Adiprawita, Widyawardana; Semibiring, Jaka

    2008-01-01T23:59:59.000Z

    This research will proposed a new kind of relatively low cost autonomous UAV that will enable farmers to make just in time mosaics of aerial photo of their crop. These mosaics of aerial photo should be able to be produced with relatively low cost and within the 24 hours of acquisition constraint. The autonomous UAV will be equipped with payload management system specifically developed for rapid aerial mapping. As mentioned before turn around time is the key factor, so accuracy is not the main focus (not orthorectified aerial mapping). This system will also be equipped with special software to post process the aerial photos to produce the mosaic aerial photo map

  14. activity monitoring sensor: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    processing. Individual sensors monitor specific physiological signals (such as EEG, ECG, GSR, etc.) and communicate with each other and the personal server. Personal server...

  15. Title: Corrosion Damage Detection with Piezoelectric Wafer Active Sensors Authors: Dustin T. Thomas

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    0 Title: Corrosion Damage Detection with Piezoelectric Wafer Active Sensors Authors: Dustin T structural problems is corrosion. In fact the KC-135 now costs $1.2 billion a year to repair corrosion) in a pitch-catch configuration. The sensors were placed on a grid pattern. Material loss through corrosion

  16. Pro-active Strategies for the Frugal Feeding Problem in Wireless Sensor Networks

    E-Print Network [OSTI]

    Lanthier, Mark

    Sensor Networks. The FFP attempts to find energy-efficient routes for a mobile service entity for the case of a fixed rendezvous location (i.e., service facility with limited number of docking ports) and mobile capable entities (sensors). Our pro-active solution reduces the FFP to finding energy

  17. ADMINISTRATIVE RECORDS SCHEDULE 17: CARTOGRAPHIC, AERIAL PHOTOGRAPHIC...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    7: CARTOGRAPHIC, AERIAL PHOTOGRAPHIC, ARCHITECTURAL, ENGINEERING, AND FACILITY MANAGEMENT RECORDS ADMINISTRATIVE RECORDS SCHEDULE 17: CARTOGRAPHIC, AERIAL PHOTOGRAPHIC,...

  18. The DOE ARM Aerial Facility

    SciTech Connect (OSTI)

    Schmid, Beat; Tomlinson, Jason M.; Hubbe, John M.; Comstock, Jennifer M.; Mei, Fan; Chand, Duli; Pekour, Mikhail S.; Kluzek, Celine D.; Andrews, Elisabeth; Biraud, S.; McFarquhar, Greg

    2014-05-01T23:59:59.000Z

    The Department of Energy Atmospheric Radiation Measurement (ARM) Program is a climate research user facility operating stationary ground sites that provide long-term measurements of climate relevant properties, mobile ground- and ship-based facilities to conduct shorter field campaigns (6-12 months), and the ARM Aerial Facility (AAF). The airborne observations acquired by the AAF enhance the surface-based ARM measurements by providing high-resolution in-situ measurements for process understanding, retrieval-algorithm development, and model evaluation that are not possible using ground- or satellite-based techniques. Several ARM aerial efforts were consolidated into the AAF in 2006. With the exception of a small aircraft used for routine measurements of aerosols and carbon cycle gases, AAF at the time had no dedicated aircraft and only a small number of instruments at its disposal. In this "virtual hangar" mode, AAF successfully carried out several missions contracting with organizations and investigators who provided their research aircraft and instrumentation. In 2009, AAF started managing operations of the Battelle-owned Gulfstream I (G-1) large twin-turboprop research aircraft. Furthermore, the American Recovery and Reinvestment Act of 2009 provided funding for the procurement of over twenty new instruments to be used aboard the G-1 and other AAF virtual-hangar aircraft. AAF now executes missions in the virtual- and real-hangar mode producing freely available datasets for studying aerosol, cloud, and radiative processes in the atmosphere. AAF is also engaged in the maturation and testing of newly developed airborne sensors to help foster the next generation of airborne instruments.

  19. Towards a sensor for detecting human presence and activity Y. Benezetha

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    and third proposing solutions based on an active management of power consumption. This last approach is not able to distinguish between pets and humans. The technological limits of these sensors, which are more

  20. An elastic-spring-substrated nanogenerator as an active sensor for self-powered balance

    E-Print Network [OSTI]

    Wang, Zhong L.

    demonstrated in various elds, such as heart- beating pulse diagnosis,13 tyre pressure/speed measurement,14 wind-substrated nanogenerator (SNG) was fabricated to accomplish the monolithic integration of an active sensor device onto

  1. NRA-00-OES-08 A one-year pilot study for the inclusion of active optical sensors into PALACE

    E-Print Network [OSTI]

    Boss, Emmanuel S.

    NRA-00-OES-08 1 A one-year pilot study for the inclusion of active optical sensors into PALACE, newly-developed solid-state, active optical sensors that measure chlorophyll a fluorescence of ancillary sensors as part of the ARGO program. The ARGO program, if funded at the level of effort proposed

  2. Active Query Forwarding in Sensor Networks Narayanan Sadagopan

    E-Print Network [OSTI]

    Krishnamachari, Bhaskar

    in this paper to calculate the energy costs associated with ACQUIRE. The models permit us to characterize schemes such as flooding-based querying (FBQ) and expanding ring search (ERS), in terms of energy usage data, this simple approach can be highly inefficient. In the context of energy-starved sensor networks

  3. Radiation interchange modeling for active infrared proximity sensor design

    E-Print Network [OSTI]

    Piper, James Clarice

    1999-01-01T23:59:59.000Z

    of the requirements for the degree of MASTER OF SCIENCE Approved as to tyle and content by: Sohi Rastegar (Co-Chair of Committee) Rai er J. Fink (Co-Chair of Committee) Hsin-i Wu (Member) ay Kuo (Head of Department) May 1999 Major Subject: Biomedical... necessitating the use of multiple source elements, sensor elements, or both. DEDICATION I dedicate this thesis to my parents and my sisters, who have always supported me in all my endeavors, however foreign to their hearts. VI ACKNOWLEDGMENTS I would like...

  4. Sandia National Laboratories: unmanned aerial system

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1developmentturbineredox-activeNationalhydrogen components Energyunmanned aerial

  5. active sensor configuration: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    recurrence satisfied by the Stirling numbers of the second kind. Abrams, Aaron; Hower, Valerie 2010-01-01 346 Measurements and simulations of MAPS (Monolithic Active Pixel...

  6. Aerial Measuring System in Japan

    SciTech Connect (OSTI)

    Lyons, C., Colton, D. P.

    2012-05-01T23:59:59.000Z

    The U.S. Department of Energy National Nuclear Security Agencys Aerial Measuring System deployed personnel and equipment to partner with the U.S. Air Force in Japan to conduct multiple aerial radiological surveys. These were the first and most comprehensive sources of actionable information for U.S. interests in Japan and provided early confirmation to the government of Japan as to the extent of the release from the Fukushima Daiichi Nuclear Power Generation Station. Many challenges were overcome quickly during the first 48 hours; including installation and operation of Aerial Measuring System equipment on multiple U.S. Air Force Japan aircraft, flying over difficult terrain, and flying with talented pilots who were unfamiliar with the Aerial Measuring System flight patterns. These all combined to make for a dynamic and non-textbook situation. In addition, the data challenges of the multiple and on-going releases, and integration with the Japanese government to provide valid aerial radiological survey products that both military and civilian customers could use to make informed decisions, was extremely complicated. The Aerial Measuring System Fukushima response provided insight in addressing these challenges and gave way to an opportunity for the expansion of the Aerial Measuring Systems mission beyond the borders of the US.

  7. Corrosion Damage Detection with Piezoelectric Wafer Active Sensors Dustin Thomas, John Welter

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    1 Corrosion Damage Detection with Piezoelectric Wafer Active Sensors Dustin Thomas, John Welter Air a priority issue for today's Air Force. One of the most critical structural problems is corrosion. In fact the KC-135 now costs $1.2 billion a year to repair corrosion. In this paper, we plan to show the use

  8. Implementation and Testing of Fault-Tolerant Photodiode-based Active Pixel Sensor (APS)

    E-Print Network [OSTI]

    Chapman, Glenn H.

    Implementation and Testing of Fault-Tolerant Photodiode-based Active Pixel Sensor (APS) Sunjaya the photodiode and readout transistors into two parallel operating devices, while keeping a common row select-tolerant photodiode APS was designed and fabricated using a CMOS 0.18µm process. Testing included both fully

  9. Fault Tolerant Photodiode and Photogate Active Pixel Sensors , Glenn H. Chapmana

    E-Print Network [OSTI]

    Chapman, Glenn H.

    Fault Tolerant Photodiode and Photogate Active Pixel Sensors Cory Junga , Glenn H. Chapmana, this design can correct for most defects allowing for higher production yields. Fault tolerant photodiode and photogate APS' were fabricated in 0.18-micron technology. Testing showed that the photodiode APS could

  10. Characteristics of Fault-Tolerant Photodiode and Photogate Active Pixel Sensor (APS)

    E-Print Network [OSTI]

    Chapman, Glenn H.

    Characteristics of Fault-Tolerant Photodiode and Photogate Active Pixel Sensor (APS) Michelle L. La tolerant APS design has been implemented in a 0.18µm CMOS process for both a photodiode based and photogate of 2.03 (stuck low) and 1.89 (stuck high) for the photodiode based APS, and 1.73 (stuck low) and 1

  11. Context-aware energy-efficient wireless sensor architecture for body activity recognition

    E-Print Network [OSTI]

    Boyer, Edmond

    conditions [13], [15], [16], and the usage of devices with higher computing, storage and energy capabilitiesContext-aware energy-efficient wireless sensor architecture for body activity recognition Tifenn 60205 Compigne, France Abstract--In this paper, we present EEWAA, a new Energy- Efficient Wireless

  12. A Reconfigurable Active Retrodirective/Direct Conversion Receiver Array for Wireless Sensor Systems

    E-Print Network [OSTI]

    Itoh, Tatsuo

    A Reconfigurable Active Retrodirective/Direct Conversion Receiver Array for Wireless Sensor Systems retrodirective/direct conversion receiver array is presented. The system can serve as both a retrodirective array transponder and a direct conversion receiver simply by changing the frequency of the LO applied to the mixers

  13. LAMB-WAVE EMBEDDED NDE WITH PIEZOELECTRIC WAFER ACTIVE SENSORS FOR STRUCTURAL HEALTH MONITORING OF

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    LAMB-WAVE EMBEDDED NDE WITH PIEZOELECTRIC WAFER ACTIVE SENSORS FOR STRUCTURAL HEALTH MONITORING waves and enable the development of embedded NDE concepts. This paper will present two embedded NDE Embedded nondestructive evaluation (E-NDE) is an emerging technology that aims at performing NDE testing

  14. BodyScope: A Wearable Acoustic Sensor for Activity Recognition

    E-Print Network [OSTI]

    Toronto, University of

    , speaking, laughing, and coughing. The F-measure of the Support Vector Machine classification of 12 of activities (e.g., eating, drinking, speaking, laughing and coughing) with BodyScope reveals that the system

  15. Photo-activated luminescence sensor and method of detecting trichloroethylene and related volatile organochloride compounds

    DOE Patents [OSTI]

    Dinh, Tuan V. (Knoxville, TN)

    1996-01-01T23:59:59.000Z

    A sensor for detecting trichloroethylene and related volatile organochloride compounds uses a photo-activator that produces a photo-product complex with the contaminant. Characteristics of the light emitted from the complex will indicate the presence of the contaminant. A probe containing the photo-activator has an excitation light interface and a contaminant interface. One particular embodiment uses a porous membrane as the contaminant interface, so that the contaminant can migrate therethrough to the photo-activator and thereby form the complex.

  16. Photo-activated luminescence sensor and method of detecting trichloroethylene and related volatile organochloride compounds

    DOE Patents [OSTI]

    Dinh, T.V.

    1996-06-11T23:59:59.000Z

    A sensor for detecting trichloroethylene and related volatile organochloride compounds uses a photo-activator that produces a photo-product complex with the contaminant. Characteristics of the light emitted from the complex will indicate the presence of the contaminant. A probe containing the photo-activator has an excitation light interface and a contaminant interface. One particular embodiment uses a porous membrane as the contaminant interface, so that the contaminant can migrate there through to the photo-activator and thereby form the complex. 23 figs.

  17. Heavily Irradiated N-in-p Thin Planar Pixel Sensors with and without Active Edges

    E-Print Network [OSTI]

    S. Terzo; L. Andricek; A. Macchiolo; H. G. Moser; R. Nisius; R. H. Richter; P. Weigell

    2014-02-19T23:59:59.000Z

    We present the results of the characterization of silicon pixel modules employing n-in-p planar sensors with an active thickness of 150 $\\mathrm{\\mu}$m, produced at MPP/HLL, and 100-200 $\\mathrm{\\mu}$m thin active edge sensor devices, produced at VTT in Finland. These thin sensors are designed as candidates for the ATLAS pixel detector upgrade to be operated at the HL-LHC, as they ensure radiation hardness at high fluences. They are interconnected to the ATLAS FE-I3 and FE-I4 read-out chips. Moreover, the n-in-p technology only requires a single side processing and thereby it is a cost-effective alternative to the n-in-n pixel technology presently employed in the LHC experiments. High precision beam test measurements of the hit efficiency have been performed on these devices both at the CERN SpS and at DESY, Hamburg. We studied the behavior of these sensors at different bias voltages and different beam incident angles up to the maximum one expected for the new Insertable B-Layer of ATLAS and for HL-LHC detectors. Results obtained with 150 $\\mathrm{\\mu}$m thin sensors, assembled with the new ATLAS FE-I4 chip and irradiated up to a fluence of 4$\\times$10$^{15}\\mathrm{n}_{\\mathrm{eq}}/\\mathrm{cm}^2$, show that they are excellent candidates for larger radii of the silicon pixel tracker in the upgrade of the ATLAS detector at HL-LHC. In addition, the active edge technology of the VTT devices maximizes the active area of the sensor and reduces the material budget to suit the requirements for the innermost layers. The edge pixel performance of VTT modules has been investigated at beam test experiments and the analysis after irradiation up to a fluence of 5$\\times$10$^{15}\\mathrm{n}_{\\mathrm{eq}}/\\mathrm{cm}^2$ has been performed using radioactive sources in the laboratory.

  18. Aerial Radiation Measurements from the Fukushima Dai-ichi Nuclear Power Plant Accident

    SciTech Connect (OSTI)

    Guss, P. P.

    2012-07-16T23:59:59.000Z

    This document is a slide show type presentation concerning DOE and Aerial Measuring System (AMS) activities and results with respect to assessing the consequences of the releases from the Fukushima Dai-ichi Nuclear Power Plant. These include ground monitoring and aerial monitoring.

  19. "Whiskbrooms" and"Pushbrooms" Remote Sensing Platforms and Sensors

    E-Print Network [OSTI]

    Frank, Thomas D.

    "Whiskbrooms" and"Pushbrooms" Remote Sensing Platforms and Sensors Remote sensing requires that a sensor be constructed and then attached to a platform that provides an aerial view of the landscape. "Whiskbrooms" and"Pushbrooms" Remote Sensing Platforms and Sensors Remote sensing requires that a sensor

  20. Learning Scene Categories from High Resolution Satellite Image for Aerial Video Analysis

    SciTech Connect (OSTI)

    Cheriyadat, Anil M [ORNL] [ORNL

    2011-01-01T23:59:59.000Z

    Automatic scene categorization can benefit various aerial video processing applications. This paper addresses the problem of predicting the scene category from aerial video frames using a prior model learned from satellite imagery. We show that local and global features in the form of line statistics and 2-D power spectrum parameters respectively can characterize the aerial scene well. The line feature statistics and spatial frequency parameters are useful cues to distinguish between different urban scene categories. We learn the scene prediction model from highresolution satellite imagery to test the model on the Columbus Surrogate Unmanned Aerial Vehicle (CSUAV) dataset ollected by high-altitude wide area UAV sensor platform. e compare the proposed features with the popular Scale nvariant Feature Transform (SIFT) features. Our experimental results show that proposed approach outperforms te SIFT model when the training and testing are conducted n disparate data sources.

  1. Self-activated ultrahigh chemosensitivity of oxide thin film nanostructures for transparent sensors

    E-Print Network [OSTI]

    Moon, Hi Gyu

    One of the top design priorities for semiconductor chemical sensors is developing simple, low-cost, sensitive and reliable sensors to be built in handheld devices. However, the need to implement heating elements in sensor ...

  2. Sharp and fast: Sensors and switches based on polymer brushes with adsorption-active minority chains

    E-Print Network [OSTI]

    Leonid I. Klushin; Alexander M. Skvortsov; Alexey A. Polotsky; Shuanhu Qi; Friederike Schmid

    2014-12-16T23:59:59.000Z

    We propose a design for polymer-based sensors and switches with sharp switching transition and fast response time. The switching mechanism involves a radical change in the conformations of adsorption-active minority chains in a brush. Such transitions can be induced by a temperature change of only about ten degrees, and the characteristic time of the conformational change is less than a second. We present an analytical theory for these switches and support it by self-consistent field calculations and Brownian dynamics simulations.

  3. Identification of "lost" structures through satellite imagery and aerial photographs at Fort Garland, CO

    E-Print Network [OSTI]

    Gilbes, Fernando

    .joyce@upr.edu ABSTRACT: Thermography studies using airborne remote sensors have proven useful in the search for buried the appropriateness of thermography studies using free LandSat 7 ETM+ images, and digital manipulation of aerial of variations in temperature to determine the presence of buried foundations or features. Thermography studies

  4. DMAPS: a fully depleted monolithic active pixel sensor - analog performance characterization

    E-Print Network [OSTI]

    Miroslav Havrnek; Tomasz Hemperek; Hans Krger; Yunan Fu; Leonard Germic; Tetsuichi Kishishita; Theresa Obermann; Norbert Wermes

    2014-07-02T23:59:59.000Z

    Monolithic Active Pixel Sensors (MAPS) have been developed since the late 1990s based on silicon substrates with a thin epitaxial layer (thickness of 10-15 $\\mu$m) in which charge is collected on an electrode, albeit by disordered and slow diffusion rather than by drift in a directed electric field. As a consequence, the signal is small ($\\approx$ 1000 e$^-$) and the radiation tolerance is much below the LHC requirements by factors of 100 to 1000. In this paper we present the development of a fully Depleted Monolithic Active Pixel Sensors (DMAPS) based on a high resistivity substrate allowing the creation of a fully depleted detection volume. This concept overcomes the inherent limitations of charge collection by diffusion in the standard MAPS designs. We present results from a test chip EPCB01 designed in a commercial 150 nm CMOS technology. The technology provides a thin (50 $\\mu$m) high resistivity n-type silicon substrate as well as an additional deep p-well which allows to integrate full CMOS circuitry inside the pixel. Different matrix types with several variants of collection electrodes have been implemented. Measurements of the analog performance of this first implementation of DMAPS pixels will be presented.

  5. Acquisition and registration of aerial video imagery of urban traffic

    SciTech Connect (OSTI)

    Loveland, Rohan C [Los Alamos National Laboratory

    2008-01-01T23:59:59.000Z

    The amount of information available about urban traffic from aerial video imagery is extremely high. Here we discuss the collection of such video imagery from a helicopter platform with a low-cost sensor, and the post-processing used to correct radial distortion in the data and register it. The radial distortion correction is accomplished using a Harris model. The registration is implemented in a two-step process, using a globally applied polyprojective correction model followed by a fine scale local displacement field adjustment. The resulting cleaned-up data is sufficiently well-registered to allow subsequent straight-forward vehicle tracking.

  6. Rev: 29 March 2011 Aerial Lift Operator Job Performance Measure (TQ-AERIAL-P)

    E-Print Network [OSTI]

    Ohta, Shigemi

    . Approximate total observation hours: ______. Administer the JPM. Equipment Qualifications Aerial Platform Manufacturer: _______________________________ Model: _____________ Maximum Capacity: ______ Note: Qualification successfully demonstrated. Type Propulsion Elevating Mechanism Qualification CodesANSI/SIA Standard Aerial

  7. AERIAL PHOTO INTERPRETATION NATIONAL INVENTORY OF LANDSCAPES

    E-Print Network [OSTI]

    MANUAL FOR AERIAL PHOTO INTERPRETATION IN THE NATIONAL INVENTORY OF LANDSCAPES IN SWEDEN NILS YEAR.................................................................................................. 10 2.1.4 Information for directed field inventories

  8. An aerial radiological survey of the Nevada Test Site

    SciTech Connect (OSTI)

    Hendricks, T J; Riedhauser, S R

    1999-12-01T23:59:59.000Z

    A team from the Remote Sensing Laboratory conducted an aerial radiological survey of the US Department of Energy's Nevada Test Site including three neighboring areas during August and September 1994. The survey team measured the terrestrial gamma radiation at the Nevada Test Site to determine the levels of natural and man-made radiation. This survey included the areas covered by previous surveys conducted from 1962 through 1993. The results of the aerial survey showed a terrestrial background exposure rate that varied from less than 6 microroentgens per hour (mR/h) to 50 mR/h plus a cosmic-ray contribution that varied from 4.5 mR/h at an elevation of 900 meters (3,000 feet) to 8.5 mR/h at 2,400 meters (8,000 feet). In addition to the principal gamma-emitting, naturally occurring isotopes (potassium-40, thallium-208, bismuth-214, and actinium-228), the man-made radioactive isotopes found in this survey were cobalt-60, cesium-137, europium-152, protactinium-234m an indicator of depleted uranium, and americium-241, which are due to human actions in the survey area. Individual, site-wide plots of gross terrestrial exposure rate, man-made exposure rate, and americium-241 activity (approximating the distribution of all transuranic material) are presented. In addition, expanded plots of individual areas exhibiting these man-made contaminations are given. A comparison is made between the data from this survey and previous aerial radiological surveys of the Nevada Test Site. Some previous ground-based measurements are discussed and related to the aerial data. In regions away from man-made activity, the exposure rates inferred from the gamma-ray measurements collected during this survey agreed very well with the exposure rates inferred from previous aerial surveys.

  9. Comparison of POLDER Cloud Phase Retrievals to Active Remote Sensors Measurements at the ARM SGP Site

    SciTech Connect (OSTI)

    Riedi, J.; Goloub, P.; Marchand, Roger T.

    2001-06-01T23:59:59.000Z

    In our present study, cloud boundaries derived from a combination of active remote sensors at the ARM SGP site are compared to POLDER cloud top phase index which is derived from polarimetric measurements using an innovative method. This approach shows the viability of the POLDER phase retrieval algorithm, and also leads to interesting results. In particular, the analysis demonstrates the sensitivity of polarization measurements to ice crystal shape and indicates that occurrence of polycrystalline ice clouds has to be taken into account in order to improve the POLDER phase retrieval algorithm accuracy. Secondly, the results show that a temperature threshold of 240 K could serve for cloud top particle phase classification. Considering the limitations of the analysis, the temperature threshold could be biased high, but not by more than about 5 degrees.

  10. Surface free-carrier screening effect on the output of a ZnO nanowire nanogenerator and its potential as a self-powered active gas sensor

    E-Print Network [OSTI]

    Wang, Zhong L.

    potential as a self-powered active gas sensor This article has been downloaded from IOPscience. Please on the output of a ZnO nanowire nanogenerator and its potential as a self-powered active gas sensor Xinyu Xue1 as a power source, but also as a response signal to the gas, demonstrating a possible approach as a self-powered

  11. aerial density distributions: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Unmanned Aerial Vehicles MIT - DSpace Summary: In order to deploy intelligent, next-generation applications on Unmanned Aerial Vehicles (UAVs), we must first develop a software...

  12. Application of piezoelectric active-sensors for SHM of wind turbine blades

    SciTech Connect (OSTI)

    Park, Gyuhae [Los Alamos National Laboratory; Taylor, Stuart G. [Los Alamos National Laboratory; Farinholt, Kevin M [Los Alamos National Laboratory; Farrar, Charles R [Los Alamos National Laboratory

    2010-10-04T23:59:59.000Z

    The goal of this study is to characterize the dynamic response of a CX-100 wind blade and the design parameters of SHM techniques as they apply to wind turbine blades, and to investigate the performance of high-frequency active-sensing SHM techniques, including lamb wave and frequency response functions, as a way to monitor the health of a wind turbine blade. The results of the dynamic characterization will be used to validate a numerical model and understand the effect of structural damage on the performance of the blades. The focus of SHM study is to assess and compare the performance of each method in identifying incipient damage, with a special consideration given to field deployability. For experiments, a 9-m CX-100 blade was used. Overall, the methods yielded sufficient damage detection to warrant further investigation into field deployment. This paper also summarizes the SHM results of a full-scale fatigue test of 9-m CX-100 blade using piezoelectric active-sensors.

  13. Aerial reconstructions via probabilistic data fusion

    E-Print Network [OSTI]

    Cabezas, Randi

    2013-01-01T23:59:59.000Z

    In this thesis we propose a probabilistic model that incorporates multi-modal noisy measurements: aerial images and Light Detection and Ranging (LiDAR) to recover scene geometry and appearance in order to build a 3D ...

  14. X-RAY ACTIVE MATRIX PIXEL SENSORS BASEDON J-FET TECHNOLOGY DEVELOPED FOR THE LINAC COHERENT LIGHT SOURCE.

    SciTech Connect (OSTI)

    CARINI,G.A.; CHEN, W.; LI, Z.; REHAK, P.; SIDDONS, D.P.

    2007-10-29T23:59:59.000Z

    An X-ray Active Matrix Pixel Sensor (XAMPS) is being developed for recording data for the X-ray Pump Probe experiment at the Linac Coherent Light Source (LCLS). Special attention has to be paid to some technological challenges that this design presents. New processes were developed and refined to address problems encountered during previous productions of XAMPS. The development of these critical steps and corresponding tests results are reported here.

  15. Activity recognition in the home setting using simple and ubiquitous sensors

    E-Print Network [OSTI]

    Munguia Tapia, Emmanuel, 1978-

    2003-01-01T23:59:59.000Z

    During the past several years, researchers have demonstrated that when new wireless sensors are placed in the home environment, data collected from them can be used by software to automatically infer context, such as the ...

  16. iCalm: Wearable Sensor and Network Architecture for Wirelessly Communicating and Logging Autonomic Activity

    E-Print Network [OSTI]

    Dobson, Kelly

    Widespread use of affective sensing in healthcare applications has been limited due to several practical factors, such as lack of comfortable wearable sensors, lack of wireless standards, and lack of low-power affordable ...

  17. Recent CESAR (Center for Engineering Systems Advanced Research) research activities in sensor based reasoning for autonomous machines

    SciTech Connect (OSTI)

    Pin, F.G.; de Saussure, G.; Spelt, P.F.; Killough, S.M.; Weisbin, C.R.

    1988-01-01T23:59:59.000Z

    This paper describes recent research activities at the Center for Engineering Systems Advanced Research (CESAR) in the area of sensor based reasoning, with emphasis being given to their application and implementation on our HERMIES-IIB autonomous mobile vehicle. These activities, including navigation and exploration in a-priori unknown and dynamic environments, goal recognition, vision-guided manipulation and sensor-driven machine learning, are discussed within the framework of a scenario in which an autonomous robot is asked to navigate through an unknown dynamic environment, explore, find and dock at the panel, read and understand the status of the panel's meters and dials, learn the functioning of a process control panel, and successfully manipulate the control devices of the panel to solve a maintenance emergency problems. A demonstration of the successful implementation of the algorithms on our HERMIES-IIB autonomous robot for resolution of this scenario is presented. Conclusions are drawn concerning the applicability of the methodologies to more general classes of problems and implications for future work on sensor-driven reasoning for autonomous robots are discussed. 8 refs., 3 figs.

  18. A Hierarchical Flight Planner for Sensor-Driven UAV Missions Spencer Clark and Michael A. Goodrich

    E-Print Network [OSTI]

    Goodrich, Michael A.

    A Hierarchical Flight Planner for Sensor-Driven UAV Missions Spencer Clark and Michael A. Goodrich Abstract-- Unmanned Aerial Vehicles (UAVs) are increas- ingly becoming economical platforms for carrying wilderness search and rescue scenarios. I. INTRODUCTION Unmanned aerial vehicles (UAVs) are frequently used

  19. Advanced Detector Research - Fabrication and Testing of 3D Active-Edge Silicon Sensors: High Speed, High Yield

    SciTech Connect (OSTI)

    Parker, Sherwood I

    2008-09-01T23:59:59.000Z

    Development of 3D silicon radiation sensors employing electrodes fabricated perpendicular to the sensor surfaces to improve fabrication yields and increasing pulse speeds.

  20. Magnetic force driven six degree-of-freedom active vibration isolation system using a phase compensated velocity sensor

    SciTech Connect (OSTI)

    Kim, Yongdae; Park, Kyihwan [Department of Mechatronics, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju 500-712 (Korea, Republic of); Kim, Sangyoo [Compressor Group, Digital Appliance Laboratory LG Electronics, Gaeumjeong-Dong, Changwon, Gyeongnam 641-711 (Korea, Republic of)

    2009-04-15T23:59:59.000Z

    A six-axis active vibration isolation system (AVIS) is developed using voice coil actuators. Point contact configuration is employed to have an easy assembly of eight voice coil actuators to an upper and a base plates. The velocity sensor, using an electromagnetic principle that is commonly used in the vibration control, is investigated since its phase lead characteristic causes an instability problem for a low frequency vibration. The performances of the AVIS are investigated in the frequency domain and finally validated by comparing with the passive isolation system using the atomic force microscope images.

  1. Robust trajectory planning for unmanned aerial vehicles in uncertain environments

    E-Print Network [OSTI]

    Luders, Brandon (Brandon Douglas)

    2008-01-01T23:59:59.000Z

    As unmanned aerial vehicles (UAVs) take on more prominent roles in aerial missions, it becomes necessary to increase the level of autonomy available to them within the mission planner. In order to complete realistic mission ...

  2. Low Power Camera-on-a-Chip Using CMOS Active Pixel Sensor Technology

    E-Print Network [OSTI]

    Fossum, Eric R.

    and scientific markets. The development of the solid-state charge-coupled device (CCD) in the early 1970's led to as a camera-on-a-chip, and represents a second generation solid state image sensor technology. A block diagram systems typically operate for an hour on an 1800 mA-hr 6 Y NiCad rechargeable battery, corresponding to 10

  3. Design Methodology for Unmannded Aerial Vehicle (UAV) Team Coordination

    E-Print Network [OSTI]

    Cummings, Mary "Missy"

    1 Design Methodology for Unmannded Aerial Vehicle (UAV) Team Coordination F.B. da Silva S.D. Scott-mail: halab@mit.edu #12;2 Design Methodology for Unmannded Aerial Vehicle (UAV) Team Coordination by F.B. da Silva, S.D. Scott, and M.L. Cummings Executive Summary Unmanned Aerial Vehicle (UAV) systems, despite

  4. Sensor readout detector circuit

    DOE Patents [OSTI]

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

    1998-08-11T23:59:59.000Z

    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.

  5. Sensor readout detector circuit

    DOE Patents [OSTI]

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

    1998-01-01T23:59:59.000Z

    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. Sensor Network Lifetime Maximization Via Sensor Energy Balancing: Construction and Optimal Scheduling of Sensor Trees

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    in such a way that the total energy usage of the active sensor nodes in the tree is minimized. However whenSensor Network Lifetime Maximization Via Sensor Energy Balancing: Construction and Optimal Scheduling of Sensor Trees Ling Shi , Agostino Capponi , Karl H. Johansson and Richard M. Murray Abstract

  7. SensorFlock: An Airborne Wireless Sensor Network of Micro-Air 1Jude Allred, 1Ahmad Bilal Hasan, 1Saroch Panichsakul, 2William Pisano,2Peter Gray, 1Jyh Huang,

    E-Print Network [OSTI]

    Mohseni, Kamran

    SensorFlock: An Airborne Wireless Sensor Network of Micro-Air Vehicles 1Jude Allred, 1Ahmad Bilal.Pisano}@colorado.edu Abstract An airborne wireless sensor network (WSN) composed of bird-sized micro aerial vehicles (MAVs, and wireless communication networking between MAVs. We present experimental results from flight tests of flocks

  8. Measurements on HV-CMOS Active Sensors After Irradiation to HL-LHC fluences

    E-Print Network [OSTI]

    B. Ristic; for the ATLAS CMOS pixel collaboration

    2015-01-13T23:59:59.000Z

    During the long shutdown (LS) 3 beginning 2022 the LHC will be upgraded for higher luminosities pushing the limits especially for the inner tracking detectors of the LHC experiments. In order to cope with the increased particle rate and radiation levels the ATLAS Inner Detector will be completely replaced by a purely silicon based one. Novel sensors based on HV-CMOS processes prove to be good candidates in terms of spatial resolution and radiation hardness. In this paper measurements conducted on prototypes built in the AMS H18 HV-CMOS process and irradiated to fluences of up to $2\\cdot10^{16}\\,\\text{n}_\\text{eq}\\text{cm}^{-2}$ are presented.

  9. MINIMIZATION OF SENSOR USAGE FOR TARGET TRACKING IN A NETWORK OF IRREGULARLY SPACED SENSORS

    E-Print Network [OSTI]

    Morrell, Darryl

    MINIMIZATION OF SENSOR USAGE FOR TARGET TRACKING IN A NETWORK OF IRREGULARLY SPACED SENSORS Thomas address the following scenario: a single target moves through a field of stationary sensors with known locations. At each time epoch, each sensor is either active or not; each active sensor outputs either target

  10. Modeling of Power and Energy Transduction of Embedded Piezoelectric Wafer Active Sensors for

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    Transmitter INPUT Transmitter PWAS A'A Electrical response (7-mm transmitter) ­ Active power ­ Reactive power ­ Reactive power is dominant · capacitive behavior 0 200 400 600 0 1000 2000 3000 4000 Electrical Reactive Power frequency (kHz) Power(mW) 21 ^ 2 active RP Y V 21 ^ 2 reactive IP Y V Piezoelectric transduction

  11. Pipeline Structural Health Monitoring Using Macro-fiber Composite Active Sensors

    SciTech Connect (OSTI)

    A.B. Thien

    2006-03-01T23:59:59.000Z

    The United States economy is heavily dependent upon a vast network of pipeline systems to transport and distribute the nation's energy resources. As this network of pipelines continues to age, monitoring and maintaining its structural integrity remains essential to the nation's energy interests. Numerous pipeline accidents over the past several years have resulted in hundreds of fatalities and billions of dollars in property damages. These accidents show that the current monitoring methods are not sufficient and leave a considerable margin for improvement. To avoid such catastrophes, more thorough methods are needed. As a solution, the research of this thesis proposes a structural health monitoring (SHM) system for pipeline networks. By implementing a SHM system with pipelines, their structural integrity can be continuously monitored, reducing the overall risks and costs associated with current methods. The proposed SHM system relies upon the deployment of macro-fiber composite (MFC) patches for the sensor array. Because MFC patches are flexible and resilient, they can be permanently mounted to the curved surface of a pipeline's main body. From this location, the MFC patches are used to monitor the structural integrity of the entire pipeline. Two damage detection techniques, guided wave and impedance methods, were implemented as part of the proposed SHM system. However, both techniques utilize the same MFC patches. This dual use of the MFC patches enables the proposed SHM system to require only a single sensor array. The presented Lamb wave methods demonstrated the ability to correctly identify and locate the presence of damage in the main body of the pipeline system, including simulated cracks and actual corrosion damage. The presented impedance methods demonstrated the ability to correctly identify and locate the presence of damage in the flanged joints of the pipeline system, including the loosening of bolts on the flanges. In addition to damage to the actual pipeline itself, the proposed methods were used to demonstrate the capability of detecting deposits inside of pipelines. Monitoring these deposits can prevent clogging and other hazardous situations. Finally, suggestions are made regarding future research issues which are needed to advance this research. Because the research of this thesis has only demonstrated the feasibility of the techniques for such a SHM system, these issues require attention before any commercial applications can be realized.

  12. a Wireless Sensor Network for Environmental Monitoring

    E-Print Network [OSTI]

    Gburzynski, Pawel

    transmitters #12;Sample sensors: #12;Sample sensors: PAR: Photosynthetically Active (solar) Radiation sensora Wireless Sensor Network for Environmental Monitoring a Wireless Sensor Network for Environmental technology: a truly self configurable, low-cost, maintenance-free, ad-hoc sensor network (not based on Zig

  13. Comparison of median frequency between traditional and functional sensor placements during activity monitoring

    E-Print Network [OSTI]

    Graham, Selina

    Long-term monitoring is of great clinical relevance. Accelerometers are often used to provide information about activities of daily living. The median frequency (f[subscript m]) of acceleration has recently been suggested ...

  14. Mitigating container security risk using real-time monitoring with active Radio Frequency Identification and sensors

    E-Print Network [OSTI]

    Schlesinger, Adam Ian

    2005-01-01T23:59:59.000Z

    The global village in which we live enables increased trade and commerce across regions but also brings a complicated new set of challenges such as terrorist activity, human and drug smuggling and theft in foreign or ...

  15. NNSA to conduct Aerial Radiation Assessment Survey over Phoenix...

    National Nuclear Security Administration (NNSA)

    conduct Aerial Radiation Assessment Survey over Phoenix, Scottsdale, Glendale, Tempe Areas | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People...

  16. Modeling and adaptive control of indoor unmanned aerial vehicles

    E-Print Network [OSTI]

    Michini, Bernard (Bernard J.)

    2009-01-01T23:59:59.000Z

    The operation of unmanned aerial vehicles (UAVs) in constrained indoor environments presents many unique challenges in control and planning. This thesis investigates modeling, adaptive control and trajectory optimization ...

  17. aerial monitoring: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Monitoring System for the Dynamics of Lands Based on Aerial Photos Assessed by Artificial Neural Techniques Physics Websites Summary: interest in this direction is the...

  18. Trajectory optimization for target localization using small unmanned aerial vehicles

    E-Print Network [OSTI]

    Ponda, Sameera S

    2008-01-01T23:59:59.000Z

    Small unmanned aerial vehicles (UAVs), equipped with navigation systems and video capability, are currently being deployed for intelligence, reconnaissance and surveillance missions. One particular mission of interest ...

  19. Experimental Analysis of Coordination Strategies to Support Wireless Sensor Networks Composed by

    E-Print Network [OSTI]

    Wagner, Flávio Rech

    in relation to energy consumption, and, due to this fact, algorithms to coordinate these systems are generally strategies; unmanned aerial vehicle ­carried sensors; area surveillance. I. INTRODUCTION A number of studies or in fixed places and sensors that are carried by mobile autonomous robots like platforms. These platforms

  20. Estimation algorithm for autonomous aerial refueling using a vision based relative navigation system

    E-Print Network [OSTI]

    Bowers, Roshawn Elizabeth

    2005-11-01T23:59:59.000Z

    A new impetus to develop autonomous aerial refueling has arisen out of the growing demand to expand the capabilities of unmanned aerial vehicles (UAVs). With autonomous aerial refueling, UAVs can retain the advantages of being small, inexpensive...

  1. Development of a Carbon Dioxide Monitoring Rotorcraft Unmanned Aerial Vehicle

    E-Print Network [OSTI]

    Zimmer, Uwe

    stage to prevent potential danger to workforce and material, and carbon capture and sequestration (CCSDevelopment of a Carbon Dioxide Monitoring Rotorcraft Unmanned Aerial Vehicle Florian Poppa and Uwe the development of a carbon dioxide (CO2) sensing rotorcraft unmanned aerial vehicle (RUAV) and the experiences

  2. E-Print Network 3.0 - aerial multispectral thermographic Sample...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and Ruijin Ma Summary: . A pilot shoreline-mapping project was carried out in the Lake Erie area using NOAANGS aerial images... , for instance, by digitizing from aerial...

  3. E-Print Network 3.0 - aerial photography scales Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    back into the mid 1930s... : aerial photography, rangelands, ecology, historic landscape legacies, vegetation change. 1 INTRODUCTION... . Acquisition of aerial photography,...

  4. E-Print Network 3.0 - aerial photo-based remote Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Vol. 2, 023541 (2008) Page 2 12;Fig. 1. Enhanced aerial photo of a network... area, landscape perspective of the aerial photography. Journal of Applied ... Source: USDA, Jornada...

  5. E-Print Network 3.0 - aerial photography Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    back into the mid 1930s... : aerial photography, rangelands, ecology, historic landscape legacies, vegetation change. 1 INTRODUCTION... . Acquisition of aerial photography,...

  6. E-Print Network 3.0 - aerial remote sensing Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Vol. 2, 023541 (2008) Page 2 12;Fig. 1. Enhanced aerial photo of a network... area, landscape perspective of the aerial photography. ... Source: USDA, Jornada Experimental Range...

  7. JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 14, NO. 5, OCTOBER 2005 1023 Micromachined Thermal Shear-Stress Sensor for

    E-Print Network [OSTI]

    Lin, Qiao

    detection of unmanned aerial vehicles [4][6]. The wall shear stress can be determined directly using Shear-Stress Sensor for Underwater Applications Yong Xu, Member, IEEE, Qiao Lin, Member, IEEE, Guoyu Lin Abstract--This paper reports the development of microma- chined thermal shear-stress sensors for underwater

  8. E-Print Network 3.0 - aerial vehicles uav Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    uav Search Powered by Explorit Topic List Advanced Search Sample search results for: aerial vehicles uav...

  9. DESIGN OF SMALL SCALE GAS TURBINE SYSTEMS FOR UNMANNED-AERIAL VEHICLES

    E-Print Network [OSTI]

    Camci, Cengiz

    Aerial Vehicles (UAV) (4) Turbomachinery Component Design Centrifugal compressor design for reduced size

  10. Motion Planning for Unmanned Aerial Vehicles with Resource Constraints

    E-Print Network [OSTI]

    Sundar, Kaarthik

    2012-10-19T23:59:59.000Z

    Small Unmanned Aerial Vehicles (UAVs) are currently used in several surveillance applications to monitor a set of targets and collect relevant data. One of the main constraints that characterize a small UAV is the maximum amount of fuel the vehicle...

  11. Carbon Nanotube-Based Electrochemical Sensor for Assay of Salivary...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Nanotube-Based Electrochemical Sensor for Assay of Salivary Cholinesterase Enzyme Activity: An Exposure Biomarker of Carbon Nanotube-Based Electrochemical Sensor for Assay of...

  12. Solar-powered unmanned aerial vehicles

    SciTech Connect (OSTI)

    Reinhardt, K.C.; Lamp, T.R.; Geis, J.W. [Wright Lab., Wright Patterson AFB, OH (United States). Aero Propulsion and Power Directorate; Colozza, A.J. [NYMA Corp., Brookpark, OH (United States). Aerospace Technology Development

    1996-12-31T23:59:59.000Z

    An analysis was performed to determine the impact of various power system components and mission requirements on the size of solar-powered high altitude long endurance (HALE)-type aircraft. The HALE unmanned aerial vehicle (UAV) has good potential for use in many military and civil applications. The primary power system components considered in this study were photovoltaic (PV) modules for power generation and regenerative fuel cells for energy storage. The impact of relevant component performance on UAV size and capability were considered; including PV module efficiency and mass, power electronics efficiency, and fuel cell specific energy. Mission parameters such as time of year, flight altitude, flight latitude, and payload mass and power were also varied to determine impact on UAV size. The aircraft analysis method used determines the required aircraft wing aspect ratio, wing area, and total mass based on maximum endurance or minimum required power calculations. The results indicate that the capacity of the energy storage system employed, fuel cells in this analysis, greatly impacts aircraft size, whereas the impact of PV module efficiency and mass is much less important. It was concluded that an energy storage specific energy (total system) of 250--500 Whr/kg is required to enable most useful missions, and that PV cells with efficiencies greater than {approximately} 12% are suitable for use.

  13. Design of a GaAs/Ge solar array for unmanned aerial vehicles

    SciTech Connect (OSTI)

    Scheiman, D.A.; Colozza, A.J. [NYMA Setar Inc., Brookpark, OH (United States); Brinker, D.J.; Bents, D.J. [National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center

    1994-12-31T23:59:59.000Z

    Unmanned Aerial Vehicles (UAV) are being proposed for many applications including surveillance, mapping and atmospheric studies. These applications require a lightweight, low speed, medium to long duration airplane. Due to the weight, speed, and altitude constraints imposed on such aircraft, solar array generated electric power is a viable alternative to air-breathing engines. Development of such aircraft is currently being funded under the Environmental Research Aircraft and Sensor Technology (ERAST) program. NASA Lewis Research Center (LeRC) is currently building a Solar Electric Airplane to demonstrate UAV technology. This aircraft utilizes high efficiency Applied Solar Energy Corporation (ASEC) GaAs/Ge space solar cells. The cells have been provided by the Air Force through the ManTech Office. Expected completion of the plane is early 1995, with the airplane currently undergoing flight testing using battery power.

  14. Design of a GaAs/Ge solar array for unmanned aerial vehicles

    SciTech Connect (OSTI)

    Scheiman, D.A.; Brinker, D.J.; Bents, D.J.; Colozza, A.J.

    1995-03-01T23:59:59.000Z

    Unmanned Aerial Vehicles (UAV) are being proposed for many applications including surveillance, mapping and atmospheric studies. These applications require a lightweight, low speed, medium to long duration airplane. Due to the weight, speed, and altitude constraints imposed on such aircraft, solar array generated electric power is a viable alternative to air-breathing engines. Development of such aircraft is currently being funded under the Environmental Research Aircraft and Sensor Technology (ERAST) program. NASA Lewis Research Center (LeRC) is currently building a Solar Electric Airplane to demonstrate UAV technology. This aircraft utilizes high efficiency Applied Solar Energy Corporation (ASEC) GaAs/Ge space solar cells. The cells have been provided by the Air Force through the ManTech Office. Expected completion of the plane is early 1995, with the airplane currently undergoing flight testing using battery power.

  15. Radiometric and Geometric Analysis of Hyperspectral Imagery Acquired from an Unmanned Aerial Vehicle

    SciTech Connect (OSTI)

    Ryan C. Hruska; Jessica J. Mitchell; Matthew O. Anderson; Nancy F. Glenn

    2012-09-01T23:59:59.000Z

    In the summer of 2010, an Unmanned Aerial Vehicle (UAV) hyperspectral in-flight calibration and characterization experiment of the Resonon PIKA II imaging spectrometer was conducted at the U.S. Department of Energys Idaho National Laboratory (INL) UAV Research Park. The purpose of the experiment was to validate the radiometric calibration of the spectrometer and determine the georegistration accuracy achievable from the on-board global positioning system (GPS) and inertial navigation sensors (INS) under operational conditions. In order for low-cost hyperspectral systems to compete with larger systems flown on manned aircraft, they must be able to collect data suitable for quantitative scientific analysis. The results of the in-flight calibration experiment indicate an absolute average agreement of 96.3%, 93.7% and 85.7% for calibration tarps of 56%, 24%, and 2.5% reflectivity, respectively. The achieved planimetric accuracy was 4.6 meters (based on RMSE).

  16. Electrocatalytic cermet sensor

    DOE Patents [OSTI]

    Shoemaker, Erika L. (Westmont, IL); Vogt, Michael C. (Westmont, IL)

    1998-01-01T23:59:59.000Z

    A sensor for O.sub.2 and CO.sub.2 gases. The gas sensor includes a plurality of layers driven by a cyclic voltage to generate a unique plot characteristic of the gas in contact with the sensor. The plurality of layers includes an alumina substrate, a reference electrode source of anions, a lower electrical reference electrode of Pt coupled to the reference source of anions, a solid electrolyte containing tungsten and coupled to the lower reference electrode, a buffer layer for preventing flow of Pt ions into the solid electrolyte and an upper catalytically active Pt electrode coupled to the buffer layer.

  17. Electrocatalytic cermet sensor

    DOE Patents [OSTI]

    Shoemaker, E.L.; Vogt, M.C.

    1998-06-30T23:59:59.000Z

    A sensor is described for O{sub 2} and CO{sub 2} gases. The gas sensor includes a plurality of layers driven by a cyclic voltage to generate a unique plot characteristic of the gas in contact with the sensor. The plurality of layers includes an alumina substrate, a reference electrode source of anions, a lower electrical reference electrode of Pt coupled to the reference source of anions, a solid electrolyte containing tungsten and coupled to the lower reference electrode, a buffer layer for preventing flow of Pt ions into the solid electrolyte and an upper catalytically active Pt electrode coupled to the buffer layer. 16 figs.

  18. Sensor Relocation with Mobile Sensors:Sensor Relocation with Mobile Sensors: Design,Design,

    E-Print Network [OSTI]

    Schindelhauer, Christian

    Sensor Relocation with Mobile Sensors:Sensor Relocation with Mobile Sensors: Design of Freiburg #12;OverviewOverview · Sensor networks · mobile sensor · mobile robot · Mote · sensor relocation #12;Sensor networks · A wirless network . · Set of sensors. · Static Mote #12;Mobile sensor networks

  19. Vibration detection in turbomachinery using non-contacting sensors

    E-Print Network [OSTI]

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

    2006-01-01T23:59:59.000Z

    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 ...

  20. Abstract--A low noise optical sensor and biocompatible microscale optical filters for integrated fluorescence sensors

    E-Print Network [OSTI]

    Maryland at College Park, University of

    Abstract--A low noise optical sensor and biocompatible microscale optical filters for integrated fluorescence sensors were developed and tested. The sensor was fabricated in a 0.5 µm CMOS process. The measured reset noise of the sensor is reduced by a factor of 10 compared to conventional active pixel

  1. Monitoring of bolted joints using piezoelectric active-sensing for aerospace applications

    SciTech Connect (OSTI)

    Park, Gyuhae [Los Alamos National Laboratory; Farrar, Charles R [Los Alamos National Laboratory; Park, Chan - Yik [ADD; Jun, Seung - Moon [ADD

    2010-01-01T23:59:59.000Z

    This paper is a report of an initial investigation into tracking and monitoring the integrity of bolted joints using piezoelectric active-sensors. The target application of this study is a fitting lug assembly of unmanned aerial vehicles (UAVs), where a composite wing is mounted to a UAV fuselage. The SHM methods deployed in this study are impedance-based SHM techniques, time-series analysis, and high-frequency response functions measured by piezoelectric active-sensors. Different types of simulated damage are introduced into the structure, and the capability of each technique is examined and compared. Additional considerations encountered in this initial investigation are made to guide further thorough research required for the successful field deployment of this technology.

  2. Active Fault Controls At High-Temperature Geothermal Sites- Prospectin...

    Open Energy Info (EERE)

    the level of unrecognized active faults present in these areas. Analysis of low-sun-angle aerial photography acquired over the Needle Rocks, Astor Pass, Empire, and Lee...

  3. aerial surveillance technology: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Infrared Sensors Physics Websites Summary: camera and a Pyroelectric InfraRed (PIR) sensor exploited to reduce remarkably the power consumption and power consumption. 1...

  4. Photovoltaic electric power applied to Unmanned Aerial Vehicles (UAV)

    SciTech Connect (OSTI)

    Geis, J.; Arnold, J.H. [Rockwell International Corp., Canoga Park, CA (United States)

    1994-09-01T23:59:59.000Z

    Photovoltaic electric-powered flight is receiving a great deal of attention in the context of the United States` Unmanned Aerial Vehicle (UAV) program. This paper addresses some of the enabling technical areas and their potential solutions. Of particular interest are the long-duration, high-altitude class of UAV`s whose mission it is to achieve altitudes between 60,000 and 100,000 feet, and to remain at those altitudes for prolonged periods performing various mapping and surveillance activities. Addressed herein are studies which reveal the need for extremely light-weight and efficient solar cells, high-efficiency electric motor-driven propeller modules, and power management and distribution control elements. Since the potential payloads vary dramatically in their power consumption and duty cycles, a typical load profile has been selected to provide commonality for the propulsion power comparisons. Since missions vary widely with respect to ground coverage requirements, from repeated orbiting over a localized target to long-distance routes over irregular terrain, the authors have also averaged the power requirements for on-board guidance and control power, as well as ground control and communication link utilization. In the context of the national technology reinvestment program, wherever possible they modeled components and materials which have been qualified for space and defense applications, yet are compatible with civilian UAV activities. These include, but are not limited to, solar cell developments, electric storage technology for diurnal operation, local and ground communications, power management and distribution, and control servo design. And finally, the results of tests conducted by Wright Laboratory on ultralight, highly efficient MOCVD GaAs solar cells purchased from EPI Materials Ltd. (EML) of the UK are presented. These cells were also used for modeling the flight characteristics of UAV aircraft.

  5. Acquisition, orthorectification, and object-based classification of unmanned aerial vehicle (UAV) imagery for rangeland monitoring

    E-Print Network [OSTI]

    Acquisition, orthorectification, and object-based classification of unmanned aerial vehicle (UAV The use of unmanned aerial vehicles (UAVs) for natural resource applications has increased considerably a UAV relatively quickly and repeatedly at low altitudes. Additional advantages over piloted aircraft

  6. E-Print Network 3.0 - aerial vehicle uav Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    uav Search Powered by Explorit Topic List Advanced Search Sample search results for: aerial vehicle uav Page: << < 1 2 3 4 5 > >> 1 Swarm Control in Unmanned Aerial Vehicles Henry...

  7. Avionics and control system development for mid-air rendezvous of two unmanned aerial vehicles

    E-Print Network [OSTI]

    Park, Sanghyuk, 1973-

    2004-01-01T23:59:59.000Z

    A flight control system was developed to achieve mid-air rendezvous of two unmanned aerial vehicles (UAVs) as a part of the Parent Child Unmanned Aerial Vehicle (PCUAV) project at MIT and the Draper Laboratory. A lateral ...

  8. E-Print Network 3.0 - aerial photographs remote Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    1880 and 1936, when numerous dunes are visible in aerial photographs. Occurrence of coppice... dunes is as shown on 1936 aerial photographs; many of these areas are now occupied...

  9. E-Print Network 3.0 - aerial transmission lines Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    1880 and 1936, when numerous dunes are visible in aerial photographs. Occurrence of coppice... dunes is as shown on 1936 aerial photographs; many of these areas are now occupied...

  10. E-Print Network 3.0 - aerial photographic interpretation Sample...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    1880 and 1936, when numerous dunes are visible in aerial photographs. Occurrence of coppice... dunes is as shown on 1936 aerial photographs; many of these areas are now occupied...

  11. E-Print Network 3.0 - aerial photograph study Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    1880 and 1936, when numerous dunes are visible in aerial photographs. Occurrence of coppice... dunes is as shown on 1936 aerial photographs; many of these areas are now occupied...

  12. Hybrid Modeling and Experimental Cooperative Control of Multiple Unmanned Aerial Vehicles

    E-Print Network [OSTI]

    Fainekos, Georgios E.

    focused on single aerial vehicles. In particular, we have witnessed autonomous or aggressive control autonomous formation flying of autonomous aerial vehicles (UAVs) are [20][24]. In [22] and [23], the authorsHybrid Modeling and Experimental Cooperative Control of Multiple Unmanned Aerial Vehicles Selcuk

  13. Intrusion detection sensor testing tools

    SciTech Connect (OSTI)

    Hayward, D.R.

    1994-08-01T23:59:59.000Z

    Intrusion detection sensors must be frequently tested to verify that they are operational, and they must be periodically tested to verify that they are functioning at required performance levels. Concerns involving this testing can include: The significant amount of manpower required, inconsistent results due to variability in methods and personnel, exposure of personnel to hazardous environments, and difficulty in obtaining access to the areas containing some of the intrusion sensors. To address these concerns, the Department of Energy directed Sandia National Labs. to develop intrusion detection sensor testing tools. Over the past two years Sandia has developed several sensor testing tool prototypes. This paper describes the evolution of an exterior intrusion detection sensor tester and automatic data logger, and also describes various interior intrusion detection sensor test fixtures that can be remotely activated to simulate an intruder.

  14. Experimental Cooperative Control of Fixed-Wing Unmanned Aerial Vehicles

    E-Print Network [OSTI]

    Fainekos, Georgios E.

    Experimental Cooperative Control of Fixed-Wing Unmanned Aerial Vehicles Selcuk Bayraktar, Georgios architecture (Cloud cap technologies) Hybrid Modeling (of the Piccolo autopilot) Experiments Autonomous Flight - 20min #12;UAVs @ Penn Servos controlling the payload LaptopPC Dell X200 3.5HP fuel engine Deployable

  15. aerial natural gas: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    aerial natural gas First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 A Low-Cost Natural GasFreshwater...

  16. myCopter Enabling Technologies for Personal Aerial Transportation Systems

    E-Print Network [OSTI]

    towards a Personal Aerial Transportation System, in which vehicles would also have vertical space into account the required operational infrastructure, instead of starting with the design of a vehicle. By investigating human-machine interfaces and training, automation technologies, and socio-economic impact, the my

  17. LOCOMOTION (TERRESTRIAL AND AERIAL) AND COMMUNICATION OF AUTONOMOUS ROBOT NETWORKS

    E-Print Network [OSTI]

    Kansas, University of

    , flying robots, micro-air vehicles, robot communication, autonomous robot networks. #12;2 1. TERRESTRIAL1 LOCOMOTION (TERRESTRIAL AND AERIAL) AND COMMUNICATION OF AUTONOMOUS ROBOT NETWORKS Arvin Agah This report focuses on locomotion and communication aspects of mobile robot networks for harsh polar

  18. Variable Radii Connected Sensor Cover in Sensor ZONGHENG ZHOU, SAMIR R. DAS, HIMANSHU GUPTA

    E-Print Network [OSTI]

    Gupta, Himanshu

    is to maintain the fidelity of the gathered data while minimizing energy usage in the network. Energy is spent to be monitored. The set of active sensors should also form a connected communication graph, so that they can of selecting a minimum energy-cost connected sensor cover, when each sensor node can vary its sensing

  19. Variable Radii Connected Sensor Cover in Sensor Networks Zongheng Zhou, Samir Das, Himanshu Gupta

    E-Print Network [OSTI]

    Das, Samir R.

    of the gathered data while minimizing energy usage in the network. Energy is spent due to message transmissions of active sensors should also form a connected communication graph, so that they can autonomously respond energy-cost connected sensor cover, when each sensor node can vary its sensing and transmission radius

  20. E-Print Network 3.0 - airborne hyperspectral sensors Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    imaging activities in Europe, ranging from sensor design and flight operation to data collection... directed towards the improvement of hyperspectral sensor and mission...

  1. Modeling a Prototype Optical Collision Avoidance Sensor For Unmanned Aerial Vehicles

    E-Print Network [OSTI]

    Hornsey, Richard

    of direct solar illumination. We demonstrate a prototype system based on a network of independent camera emulator allows for realistic field tests with consumer components. Aspects of the design, implementation. Numerous versions of the SAA instrument based on radar, LIDAR and passive- optical, among other

  2. aerial cable facility: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    system demonstrate the ability of the designed platform-- Autonomous monitoring, mobile robot, crawler, sensors, underground cables, aging status. I. INTRODUCTION he Mamishev,...

  3. Gas sensor

    DOE Patents [OSTI]

    Schmid, Andreas K.; Mascaraque, Arantzazu; Santos, Benito; de la Figuera, Juan

    2014-09-09T23:59:59.000Z

    A gas sensor is described which incorporates a sensor stack comprising a first film layer of a ferromagnetic material, a spacer layer, and a second film layer of the ferromagnetic material. The first film layer is fabricated so that it exhibits a dependence of its magnetic anisotropy direction on the presence of a gas, That is, the orientation of the easy axis of magnetization will flip from out-of-plane to in-plane when the gas to be detected is present in sufficient concentration. By monitoring the change in resistance of the sensor stack when the orientation of the first layer's magnetization changes, and correlating that change with temperature one can determine both the identity and relative concentration of the detected gas. In one embodiment the stack sensor comprises a top ferromagnetic layer two mono layers thick of cobalt deposited upon a spacer layer of ruthenium, which in turn has a second layer of cobalt disposed on its other side, this second cobalt layer in contact with a programmable heater chip.

  4. Sensor apparatus

    DOE Patents [OSTI]

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

    2009-12-22T23:59:59.000Z

    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, futher, 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.

  5. E-Print Network 3.0 - aerial prospecting Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    aerial photo- graphs for business or personal reasons. They may want Source: Fleskes, Joe - Dixon Field Station, Western Ecological Research Center, USGS Collection:...

  6. E-Print Network 3.0 - aerial radiation survey Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    20. No.1. Milrch 2000. pp. 177-1113 2000. The Society of Wetland Scientists Summary: -w TEMPORAL DISTRIBUTION OF WATERFOWL IN EASTERN SOUTH DAKOTA: IMPLICATIONS FOR AERIAL...

  7. E-Print Network 3.0 - aerial surveying Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    20. No.1. Milrch 2000. pp. 177-1113 2000. The Society of Wetland Scientists Summary: -w TEMPORAL DISTRIBUTION OF WATERFOWL IN EASTERN SOUTH DAKOTA: IMPLICATIONS FOR AERIAL...

  8. E-Print Network 3.0 - aerial spectrometric survey Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    20. No.1. Milrch 2000. pp. 177-1113 2000. The Society of Wetland Scientists Summary: -w TEMPORAL DISTRIBUTION OF WATERFOWL IN EASTERN SOUTH DAKOTA: IMPLICATIONS FOR AERIAL...

  9. E-Print Network 3.0 - aerial surveys give Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    20. No.1. Milrch 2000. pp. 177-1113 2000. The Society of Wetland Scientists Summary: -w TEMPORAL DISTRIBUTION OF WATERFOWL IN EASTERN SOUTH DAKOTA: IMPLICATIONS FOR AERIAL...

  10. Integrating Geometric, Motion and Appearance Constraints for Robust Tracking in Aerial Videos

    E-Print Network [OSTI]

    Hasan, Mahmudul

    2013-01-01T23:59:59.000Z

    in Aerial Videos Mahmudul Hasan, Elliot Staudt, and Amit K.frame. All other Mahmudul Hasan is with the Department of

  11. E-Print Network 3.0 - aerial radiation detection Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Powered by Explorit Topic List Advanced Search Sample search results for: aerial radiation detection Page: << < 1 2 3 4 5 > >> 1 A Probabilistic Framework to Detect Buildings...

  12. An Attempt To Use Aerial Gamma-Ray Spectrometry Results In Petrochemic...

    Open Energy Info (EERE)

    Reference LibraryAdd to library Journal Article: An Attempt To Use Aerial Gamma-Ray Spectrometry Results In Petrochemical Assessments Of The Volcanic And Plutonic...

  13. E-Print Network 3.0 - aerial vehicles formulation Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Powered by Explorit Topic List Advanced Search Sample search results for: aerial vehicles formulation Page: << < 1 2 3 4 5 > >> 1 George Vachtsevanos, Panos Antsaklis, Kimon...

  14. E-Print Network 3.0 - all-electric unmanned aerial Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Search Powered by Explorit Topic List Advanced Search Sample search results for: all-electric unmanned aerial Page: << < 1 2 3 4 5 > >> 1 George Vachtsevanos, Panos Antsaklis,...

  15. E-Print Network 3.0 - aerial vehicle radome Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Panos Antsaklis, Kimon Valavanis, "Modeling and Control of Unmanned Aerial Vehicles Current Status and Future Directions," Chapter 9, Modeling and Control of Complex...

  16. E-Print Network 3.0 - aerial distant observer Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    obtained results outperform those obtained by supervised... classification alone. Index Terms-- Aerial image indexing, Auto-adaptive window size, Combining supervised Source: Ecole...

  17. Modeling, Simulation and Control System Design for Civil Unmanned Aerial Vehicle (UAV).

    E-Print Network [OSTI]

    Bagheri, Shahriar

    2014-01-01T23:59:59.000Z

    ?? Unmanned aerial systems have been widely used for variety of civilian applications over the past few years. Some of these applications require accurate guidance (more)

  18. Practical strategies of wind energy utilization for uninhabited aerial vehicles in loiter flights.

    E-Print Network [OSTI]

    Singhania, Hong Yang

    2008-01-01T23:59:59.000Z

    ??Uninhabited Aerial Vehicle (UAV) is becoming increasingly attractive in missions where human presence is undesirable or impossible. Agile maneuvers and long endurance are among the (more)

  19. Integrating Geometric, Motion and Appearance Constraints for Robust Tracking in Aerial Videos

    E-Print Network [OSTI]

    Hasan, Mahmudul

    2013-01-01T23:59:59.000Z

    P. Pan and D. Schonfeld, Video tracking based on sequentialand S. Mubarak, Simultaneous video stabilization and movingAlgorithm 2: GMAC aerial video tracking Data: Unstable

  20. E-Print Network 3.0 - aerial vehicle systems Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    December 11, 2005 Summary: highways, formations of unmanned aerial vehicles or arrays of micro-cantilevers for massively parallel data... , Spain CONTROL, ESTIMATION, AND...

  1. E-Print Network 3.0 - aphid aerial density Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    densities in insecticide-treated plots were up to four times greater 21 days after... cotton aphids (Homoptera: Aphididae) by aerial conidia ... Source: Rosenheim, Jay A. -...

  2. E-Print Network 3.0 - aerial vehicle air Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    search results for: aerial vehicle air Page: << < 1 2 3 4 5 > >> 1 The Center for Control, Dynamical Systems, and Computation University of California at Santa Barbara...

  3. E-Print Network 3.0 - aerial vehicle instrumentation Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    W. McLain, Randal W. Beard, "Maximizing miniature aerial vehicles," IEEE Robotics and Automation... Unexpected Obstacle Research Overview Guidance, Navigation, Vehicle...

  4. E-Print Network 3.0 - autonomous unmanned aerial Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for Miniature Helicopters with Summary: -based autonomous landing of an unmanned aerial vehicle. In IEEE Intl. Conf. on Robotics and Automation (ICRA... flying robots (MFRs)....

  5. Sensors 2009, 9, 8336-8348; doi:10.3390/s91008336 ISSN 1424-8220

    E-Print Network [OSTI]

    Huang, Haimei

    Sensors 2009, 9, 8336-8348; doi:10.3390/s91008336 sensors ISSN 1424-8220 www.mdpi.com/journal/sensors. Under the identified biasing condition, the signal-to-noise ratio of the ISFET as a pH sensor is proved, biomolecules, neural activity, etc. [1-6]. In these applications, a large sensor array is becoming essential

  6. Virtual Sensors: Abstracting Data from Physical Sensors

    E-Print Network [OSTI]

    Julien, Christine

    Virtual Sensors: Abstracting Data from Physical Sensors TR-UTEDGE-2006-001 Sanem Kabadayi Adam Pridgen Christine Julien © Copyright 2006 The University of Texas at Austin #12;Virtual Sensors: Abstracting Data from Physical Sensors Sanem Kabadayi, Adam Pridgen, and Christine Julien The Center

  7. Design & implementation of a wireless sensor prototyping kit

    E-Print Network [OSTI]

    Hope, Jamison Roger

    2005-01-01T23:59:59.000Z

    In recent years, wireless sensor networks (WSN) has become an active area of research among computer scientists. In this work, JONA, a prototyping kit for wireless sensors, will be described. The intention of this kit is ...

  8. Aerial Measuring System (AMS) Baseline Surveys for Emergency Planning

    SciTech Connect (OSTI)

    Lyons, C

    2012-06-04T23:59:59.000Z

    Originally established in the 1960s to support the Nuclear Test Program, the AMS mission is to provide a rapid and comprehensive worldwide aerial measurement, analysis, and interpretation capability in response to a nuclear/radiological emergency. AMS provides a responsive team of individuals whose processes allow for a mission to be conducted and completed with results available within hours. This presentation slide-show reviews some of the history of the AMS, summarizes present capabilities and methods, and addresses the value of the surveys.

  9. Corrosion sensor

    DOE Patents [OSTI]

    Glass, Robert S. (Livermore, CA); Clarke, Jr., Willis L. (San Ramon, CA); Ciarlo, Dino R. (Livermore, CA)

    1994-01-01T23:59:59.000Z

    A corrosion sensor array incorporating individual elements for measuring various elements and ions, such as chloride, sulfide, copper, hydrogen (pH), etc. and elements for evaluating the instantaneous corrosion properties of structural materials. The exact combination and number of elements measured or monitored would depend upon the environmental conditions and materials used which are subject to corrosive effects. Such a corrosion monitoring system embedded in or mounted on a structure exposed to the environment would serve as an early warning system for the onset of severe corrosion problems for the structure, thus providing a safety factor as well as economic factors. The sensor array is accessed to an electronics/computational system, which provides a means for data collection and analysis.

  10. Corrosion sensor

    DOE Patents [OSTI]

    Glass, R.S.; Clarke, W.L. Jr.; Ciarlo, D.R.

    1994-04-26T23:59:59.000Z

    A corrosion sensor array is described incorporating individual elements for measuring various elements and ions, such as chloride, sulfide, copper, hydrogen (pH), etc. and elements for evaluating the instantaneous corrosion properties of structural materials. The exact combination and number of elements measured or monitored would depend upon the environmental conditions and materials used which are subject to corrosive effects. Such a corrosion monitoring system embedded in or mounted on a structure exposed to the environment would serve as an early warning system for the onset of severe corrosion problems for the structure, thus providing a safety factor as well as economic factors. The sensor array is accessed to an electronics/computational system, which provides a means for data collection and analysis. 7 figures.

  11. A Low-Cost Natural Gas/Freshwater Aerial Pipeline

    E-Print Network [OSTI]

    Alexander Bolonkin; Richard Cathcart

    2007-01-05T23:59:59.000Z

    Offered is a new type of low-cost aerial pipeline for delivery of natural gas, an important industrial and residential fuel, and freshwater as well as other payloads over long distances. The offered pipeline dramatically decreases the construction and operation costs and the time necessary for pipeline construction. A dual-use type of freight pipeline can improve an arid rural environment landscape and provide a reliable energy supply for cities. Our aerial pipeline is a large, self-lofting flexible tube disposed at high altitude. Presently, the term "natural gas" lacks a precise technical definition, but the main components of natural gas are methane, which has a specific weight less than air. A lift force of one cubic meter of methane equals approximately 0.5 kg. The lightweight film flexible pipeline can be located in the Earth-atmosphere at high altitude and poses no threat to airplanes or the local environment. The authors also suggest using lift force of this pipeline in tandem with wing devices for cheap shipment of a various payloads (oil, coal and water) over long distances. The article contains a computed macroproject in northwest China for delivery of 24 billion cubic meter of gas and 23 millions tonnes of water annually.

  12. DOWNSTREAM CHANNEL CHANGES AFTER A SMALL DAM REMOVAL: USING AERIAL PHOTOS AND MEASUREMENT ERROR FOR CONTEXT;

    E-Print Network [OSTI]

    Tullos, Desiree

    DOWNSTREAM CHANNEL CHANGES AFTER A SMALL DAM REMOVAL: USING AERIAL PHOTOS AND MEASUREMENT ERROR to assess downstream channel changes associated with a small dam removal. The Brownsville Dam, a 2.1 m tall downstream from the dam and in an upstream control reach using aerial photos (19942008) and in the field

  13. Safety First Safety Last Safety Always Aerial lifts include the following types of vehicle-mounted

    E-Print Network [OSTI]

    Minnesota, University of

    Safety First Safety Last Safety Always Aerial lifts include the following types of vehicle, if they can be installed safely. Aerial Lifts Safety Tip #11 A spill, a slip, a hospital trip #12;Additional Information for Presenters Review the information provided on the reverse side of this safety tip sheet

  14. Situational Awareness of a Ground Robot from an Unmanned Aerial Vehicle

    E-Print Network [OSTI]

    Kochersberger, Kevin

    possible without the support of the Defense Threat Reduction Agency and the partnership of Savannah River an Unmanned Aerial Vehicle Daniel Hager ABSTRACT In the operation of unmanned vehicles, safety is a primary system that allows for safe deployment and operation of a ground robot from an unmanned aerial vehicle

  15. An Onboard Monocular Vision System for Autonomous Takeoff, Hovering and Landing of a Micro Aerial Vehicle

    E-Print Network [OSTI]

    Zell, Andreas

    An Onboard Monocular Vision System for Autonomous Takeoff, Hovering and Landing of a Micro Aerial monocular vision system for autonomous takeoff, hovering and landing of a Micro Aerial Vehicle (MAV). Since pose, yaw angle of the MAV, is estimated from the ellipse fitted from the letter "H". The efficiency

  16. Modelling of a captive unmanned aerial system teledetecting oil pollution on sea surface

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -Water Horizon crisis in the Gulf of Mexico, numerous aerial means were used to detect oil pollution locationsModelling of a captive unmanned aerial system teledetecting oil pollution on sea surface F. Muttin-spill, detection, dynamic modelling, winch, maritime pollution. 1 Introduction During 2010, and the Deep

  17. DOE/NNSA Aerial Measuring System (AMS): Flying the 'Real' Thing

    SciTech Connect (OSTI)

    Craig Lyons

    2011-06-24T23:59:59.000Z

    This slide show documents aerial radiation surveys over Japan. Map product is a compilation of daily aerial measuring system missions from the Fukushima Daiichi power plant to 80 km radius. In addition, other flights were conducted over US military bases and the US embassy.

  18. Use of Micro Unmanned Aerial Vehicles in Transportation Infrastructure Condition Surveys

    E-Print Network [OSTI]

    Hart, William Scott

    2011-02-22T23:59:59.000Z

    Collection Methods????????????????.......................... 9 2.4 Evolution of the Micro-Unmanned Aerial Vehicle??????............. 10 2.5 Current Uses of Micro-Unmanned Aerial Vehicles??????..........? 12 2.6 Types of MUAVs...?s Potential for Creating a Safer Work Environment....................................................................................... 10 2.4. Dragan Fly Innovations Tango Plane Type MUAV (Dragan Fly 2010...

  19. Techniques and Technology Article Aerial Surveys for Estimating Wild Turkey Abundance in

    E-Print Network [OSTI]

    Butler, Matthew J.

    Techniques and Technology Article Aerial Surveys for Estimating Wild Turkey Abundance in the Texas Aerial surveys have been used to estimate abundance of several wild bird species including wild turkeys (Meleagris gallopavo). We used inflatable turkey decoys at 3 study sites in the Texas Rolling Plains

  20. Wind-Energy based Path Planning For Unmanned Aerial Vehicles Using Markov Decision Processes

    E-Print Network [OSTI]

    Smith, Ryan N.

    Wind-Energy based Path Planning For Unmanned Aerial Vehicles Using Markov Decision Processes Wesam H. Al-Sabban, Luis F. Gonzalez and Ryan N. Smith Abstract-- Exploiting wind-energy is one possible way to extend the flight duration of an Unmanned Aerial Vehicle. Wind-energy can also be used

  1. Modeling Residential Urban Areas from Dense Aerial LiDAR Point Clouds

    E-Print Network [OSTI]

    Shahabi, Cyrus

    Modeling Residential Urban Areas from Dense Aerial LiDAR Point Clouds Qian-Yi Zhou and Ulrich models for residential areas from aerial LiDAR scans. The key differ- ence between downtown area modeling and residential area modeling is that the latter usually contains rich vegetation. Thus, we propose a robust

  2. Weed Mapping in Early-Season Maize Fields Using Object-Based Analysis of Unmanned Aerial Vehicle (UAV) Images

    E-Print Network [OSTI]

    Kelly, Maggi

    2013-01-01T23:59:59.000Z

    10 | e77151 Weed Maps with UAV Images References 1. ECPA (of unmanned aerial vehicle (UAV) imagery for rangelandUnmanned Aerial Vehicle (UAV) for Early Site Specific Weed

  3. Demo Abstract: BlimpProbe: An Aerial Surveillance Platform

    E-Print Network [OSTI]

    Ouhyoung, Ming

    #12;Arduino board as well as to the motors. The smart phone runs the blimp's navigation program) signals to control the motor. (3) The Arduino Pro mini board connects to three off-phone weather sensors

  4. Hydrogen sensor

    DOE Patents [OSTI]

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

    2010-11-23T23:59:59.000Z

    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.

  5. Monitoring Energy Consumption In Wireless Sensor Networks

    E-Print Network [OSTI]

    Turau, Volker

    Monitoring Energy Consumption In Wireless Sensor Networks Matthias Witt, Christoph Weyer, it may impair the ability of the sensor network to function. Therefore, minimizing energy consumption energy consumption in both standby and active modes is the basis of wireless networks. Energy preserving

  6. Air quality investigations of the Sandia National Laboratories Sol se Mete Aerial Cable Facility

    SciTech Connect (OSTI)

    Gutman, W.M.; Silver, R.J. [New Mexico State Univ., Las Cruces, NM (United States). Physical Science Lab.

    1994-12-01T23:59:59.000Z

    The air quality implications of the test and evaluation activities at the Sandia National Laboratories Sol se Mete Aerial Cable Facility are examined. All facets of the activity that affect air quality are considered. Air contaminants produced directly include exhaust products of rocket motors used to accelerate test articles, dust and gas from chemical explosives, and exhaust gases from electricity generators in the test arenas. Air contaminants produced indirectly include fugitive dust and exhaust contaminants from vehicles used to transport personnel and material to the test area, and effluents produced by equipment used to heat the project buildings. Both the ongoing program and the proposed changes in the program are considered. Using a reliable estimate of th maximum annual testing level, the quantities of contaminants released by project activities ar computed either from known characteristics of test items or from EPA-approved emission factors Atmospheric concentrations of air contaminants are predicted using EPA dispersion models. The predicted quantities and concentrations are evaluated in relation to Federal, New Mexico, an Bernalillo County air quality regulations and the human health and safety standards of the American Conference of Governmental Industrial Hygienists.

  7. Online Sensor Calibration Assessment in Nuclear Power Systems

    SciTech Connect (OSTI)

    Coble, Jamie B.; Ramuhalli, Pradeep; Meyer, Ryan M.; Hashemian, Hash

    2013-06-01T23:59:59.000Z

    Safe, efficient, and economic operation of nuclear systems (nuclear power plants, fuel fabrication and storage, used fuel processing, etc.) relies on transmission of accurate and reliable measurements. During operation, sensors degrade due to age, environmental exposure, and maintenance interventions. Sensor degradation can affect the measured and transmitted signals, including sensor failure, signal drift, sensor response time, etc. Currently, periodic sensor recalibration is performed to avoid these problems. Sensor recalibration activities include both calibration assessment and adjustment (if necessary). In nuclear power plants, periodic recalibration of safety-related sensors is required by the plant technical specifications. Recalibration typically occurs during refueling outages (about every 18 to 24 months). Non-safety-related sensors also undergo recalibration, though not as frequently. However, this approach to maintaining sensor calibration and performance is time-consuming and expensive, leading to unnecessary maintenance, increased radiation exposure to maintenance personnel, and potential damage to sensors. Online monitoring (OLM) of sensor performance is a non-invasive approach to assess instrument calibration. OLM can mitigate many of the limitations of the current periodic recalibration practice by providing more frequent assessment of calibration and identifying those sensors that are operating outside of calibration tolerance limits without removing sensors or interrupting operation. This can support extended operating intervals for unfaulted sensors and target recalibration efforts to only degraded sensors.

  8. 3.5 Nanowire Sensors 3.5.1 Background

    E-Print Network [OSTI]

    117 3.5 Nanowire Sensors 3.5.1 Background Nanowires are solid, rod-like materials with diameters that similar commercial products will eventually be available. 3.5.2 Description Nanowire sensors have et al. 2003). A comprehensive review of current research activities on chemical sensors based

  9. Configurable dynamic privacy for pervasive sensor networks

    E-Print Network [OSTI]

    Gong, Nan-Wei

    2009-01-01T23:59:59.000Z

    Ubiquitous computing sensor networks have greatly augmented the functionality of interactive media systems by adding the ability to capture and store activity-related information. Analyzing the information recorded from ...

  10. Sensor response rate accelerator

    DOE Patents [OSTI]

    Vogt, Michael C. (Westmont, IL)

    2002-01-01T23:59:59.000Z

    An apparatus and method for sensor signal prediction and for improving sensor signal response time, is disclosed. An adaptive filter or an artificial neural network is utilized to provide predictive sensor signal output and is further used to reduce sensor response time delay.

  11. Remotely Deployed Virtual Sensors

    E-Print Network [OSTI]

    Julien, Christine

    Remotely Deployed Virtual Sensors TR-UTEDGE-2007-010 Sanem Kabadayi Christine Julien © Copyright 2007 The University of Texas at Austin #12;Remotely Deployed Virtual Sensors Sanem Kabadayi that run on mobile client devices connect to the sensors of a multihop sensor network. For emerging

  12. Real-time method for establishing a detection map for a network of sensors

    DOE Patents [OSTI]

    Nguyen, Hung D; Koch, Mark W; Giron, Casey; Rondeau, Daniel M; Russell, John L

    2012-09-11T23:59:59.000Z

    A method for establishing a detection map of a dynamically configurable sensor network. This method determines an appropriate set of locations for a plurality of sensor units of a sensor network and establishes a detection map for the network of sensors while the network is being set up; the detection map includes the effects of the local terrain and individual sensor performance. Sensor performance is characterized during the placement of the sensor units, which enables dynamic adjustment or reconfiguration of the placement of individual elements of the sensor network during network set-up to accommodate variations in local terrain and individual sensor performance. The reconfiguration of the network during initial set-up to accommodate deviations from idealized individual sensor detection zones improves the effectiveness of the sensor network in detecting activities at a detection perimeter and can provide the desired sensor coverage of an area while minimizing unintentional gaps in coverage.

  13. Leak Detection and H2 Sensor Development

    SciTech Connect (OSTI)

    Brosha, Eric L. [Los Alamos National Laboratory

    2012-07-10T23:59:59.000Z

    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.

  14. Vision-Based Following of Structures Using an Unmanned Aerial Vehicle (UAV)

    E-Print Network [OSTI]

    Rathinam, Sivakumar; Kim, ZuWhan; Sengupta, Raja

    2006-01-01T23:59:59.000Z

    is shown in ?gures 16. The UAV was able to track a curvedan Unmanned Aerial Vehicle (UAV) Sivakumar Rathinam, ZuWhanof Structures using an UAV Sivakumar Rathinam*, ZuWhan Kim

  15. Autonomous navigation and tracking of dynamic surface targets on-board a computationally impoverished aerial vehicle

    E-Print Network [OSTI]

    Selby, William Clayton

    2011-01-01T23:59:59.000Z

    This thesis describes the development of an independent, on-board visual servoing system which allows a computationally impoverished aerial vehicle to autonomously identify and track a dynamic surface target. Image ...

  16. Embedded avionics with Kalman state estimation for a novel micro-scale unmanned aerial vehicle

    E-Print Network [OSTI]

    Tzanetos, Theodore

    2013-01-01T23:59:59.000Z

    An inertial navigation system leveraging Kalman estimation techniques and quaternion dynamics is developed for deployment to a micro-scale unmanned aerial vehicle (UAV). The capabilities, limitations, and requirements of ...

  17. E-Print Network 3.0 - aerial tomato diseases Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Search Sample search results for: aerial tomato diseases Page: << < 1 2 3 4 5 > >> 1 Potato & Tomato Late Blight Confirmed in Wisconsin July 14, 2010 by Amanda Gevens Summary:...

  18. Biogeochemistry of Isotopically-distinct Sources of Lead in a Former WWII Aerial Gunnery Range

    E-Print Network [OSTI]

    McBee, Jayme M

    2014-01-08T23:59:59.000Z

    Isotopic composition and concentrations of Pb are used to identify sources of anthropogenic and natural Pb and to assess Pb bioavailability in soils and native plants at a former military installation that served as a WWII era aerial gunnery range...

  19. E-Print Network 3.0 - aerial gamma ray Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Powered by Explorit Topic List Advanced Search Sample search results for: aerial gamma ray Page: << < 1 2 3 4 5 > >> 1 Evaluating the Impact of Advanced Memory Systems on...

  20. E-Print Network 3.0 - aerial vehicle piloting Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the European Union under the 7th Framework Programme Summary: design of a Personal Aerial Vehicle The myCopter project will investigate User-centered design of human... , Max...

  1. Connected K-Coverage Problem in Sensor Networks Zongheng Zhou, Samir Das, Himanshu Gupta

    E-Print Network [OSTI]

    Das, Samir R.

    energy usage in the network. Energy is spent due to message transmissions among sensor nodes, or due-- In overdeployed sensor networks, one approach to conserve energy is to keep only a small subset of sensors active" by at least K different sensors in M, and the communication graph induced by M is connected. For the above

  2. Connected K-Coverage Problem in Sensor Networks Zongheng Zhou, Samir Das, Himanshu Gupta

    E-Print Network [OSTI]

    Gupta, Himanshu

    energy usage in the network. Energy is spent due to message transmissions among sensor nodes, or due-- In overdeployed sensor networks, one approach to conserve energy is to keep only a small subset of sensors active" by at least different sensors in ¡ , and the communication graph induced by ¡ is connected. For the above

  3. A FRAMEWORK FOR DESIGNING SENSOR-BASED INTERACTIONS TO PROMOTE EXPLORATION AND REFLECTION IN PLAY

    E-Print Network [OSTI]

    with a discussion of the core properties of sensor technologies. 1. INTRODUCTION Originally, sensor technology uses of sensors were monitoring activities, such as the thermostat of a central heating system. If the building was too cold the heating was switched on. Nowadays, sensors are being used in a range

  4. Atmospheric Radiation Measurement (ARM) Data from the ARM Aerial Facility

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The Atmospheric Radiation Measurement (ARM) Program is the largest global change research program supported by the U.S. Department of Energy. The primary goal of the ARM Program is to improve the treatment of cloud and radiation physics in global climate models in order to improve the climate simulation capabilities of these models. ARM data is collected both through permanent monitoring stations and field campaigns around the world. Airborne measurements required to answer science questions from researchers or to validate ground data are also collected. To find data from all categories of aerial operations, follow the links from the AAF information page at http://www.arm.gov/sites/aaf. Tables of information will provide start dates, duration, lead scientist, and the research site for each of the named campaigns. The title of a campaign leads, in turn, to a project description, contact information, and links to the data. Users will be requested to create a password, but the data files are free for viewing and downloading. The ARM Archive physically resides at the Oak Ridge National Laboratory.

  5. AERIAL MEASUREMENTS OF CONVECTION CELL ELEMENTS IN HEATED LAKES

    SciTech Connect (OSTI)

    Villa-Aleman, E; Saleem Salaymeh, S; Timothy Brown, T; Alfred Garrett, A; Malcolm Pendergast, M; Linda Nichols, L

    2007-12-19T23:59:59.000Z

    Power plant-heated lakes are characterized by a temperature gradient in the thermal plume originating at the discharge of the power plant and terminating at the water intake. The maximum water temperature discharged by the power plant into the lake depends on the power generated at the facility and environmental regulations on the temperature of the lake. Besides the observed thermal plume, cloud-like thermal cells (convection cell elements) are also observed on the water surface. The size, shape and temperature of the convection cell elements depends on several parameters such as the lake water temperature, wind speed, surfactants and the depth of the thermocline. The Savannah River National Laboratory (SRNL) and Clemson University are collaborating to determine the applicability of laboratory empirical correlations between surface heat flux and thermal convection intensity. Laboratory experiments at Clemson University have demonstrated a simple relationship between the surface heat flux and the standard deviation of temperature fluctuations. Similar results were observed in the aerial thermal imagery SRNL collected at different locations along the thermal plume and at different elevations. SRNL will present evidence that the results at Clemson University are applicable to cooling lakes.

  6. Aerial Measuring System Technical Integration Annual Report 2002

    SciTech Connect (OSTI)

    Bechtel Nevada Remote Sensing Laboratory

    2003-06-01T23:59:59.000Z

    Fiscal Year 2002 is the second year of a five-year commitment by the U.S. Department of Energy, National Nuclear Security Administration (NNSA) to invest in development of new and state-of-the-art technologies for the Aerial Measuring Systems (AMS) project. In 2000, NNSA committed to two million dollars for AMS Technical Integration (TI) for each of five years. The tragedy of September 11, 2001, profoundly influenced the program. NNSA redirected people and funding resources at the Remote Sensing Laboratory (RSL) to more immediate needs. Funds intended for AMS TI were redirected to NNSA's new posture of leaning further forward throughout. AMS TI was brought to a complete halt on December 10, 2001. Then on April 30, 2002, NNSA Headquarters allowed the restart of AMS TI at the reduced level of $840,000. The year's events resulted in a slow beginning of several projects, some of which were resumed only a few weeks before the AMS TI Symposium held at RSL on July 30.

  7. Utilization of Local Law Enforcement Aerial Resources in Consequence Management (CM) Response

    SciTech Connect (OSTI)

    Wasiolek, Piotr T.; Malchow, Russell L.

    2013-03-12T23:59:59.000Z

    During the past decade the U.S. Department of Homeland Security (DHS) was instrumental in enhancing the nations ability to detect and prevent a radiological or nuclear attack in the highest risk cities. Under the DHS Securing the Cities initiative, nearly 13,000 personnel in the New York City region have been trained in preventive radiological and nuclear detection operations, and nearly 8,500 pieces of radiological detection equipment have been funded. As part of the preventive radiological/nuclear detection (PRND) mission, several cities have received funding to purchase commercial aerial radiation detection systems. In 2008, the U.S. Department of Energy, National Nuclear Security Administration Aerial Measuring System (AMS) program started providing Mobile Aerial Radiological Surveillance (MARS) training to such assets, resulting in over 150 HAZMAT teams officers and pilots from 10 law enforcement organizations and fire departments being trained in the aerial radiation detection. From the beginning, the MARS training course covered both the PRND and consequence management (CM) missions. Even if the law enforcement main focus is PRND, their aerial assets can be utilized in the collection of initial radiation data for post-event radiological CM response. Based on over 50 years of AMS operational experience and information collected during MARS training, this presentation will focus on the concepts of CM response using aerial assets as well as utilizing law enforcement/fire department aerial assets in CM. Also discussed will be the need for establishing closer relationships between local jurisdictions aerial radiation detection capabilities and state and local radiation control program directors, radiological health department managers, etc. During radiological events these individuals may become primary experts/advisers to Incident Commanders for radiological emergency response, especially in the early stages of a response. The knowledge of the existence, specific capabilities, and use of local aerial radiation detection systems would be critical in planning the response, even before federal assets arrive on the scene. The relationship between local and federal aerial assets and the potential role for the further use of the MARS training and expanded AMS Reachback capabilities in facilitating such interactions will be discussed.

  8. Radionuclide Sensors for Water Monitoring

    SciTech Connect (OSTI)

    Grate, Jay W.; Egorov, Oleg B.; DeVol, Timothy A.

    2003-06-01T23:59:59.000Z

    Radionuclide contamination in the soil and groundwater at U.S. Department of Energy (DOE) sites is a severe problem that requires monitoring and remediation. Radionuclide measurement techniques are needed to monitor surface waters, groundwater, and process waters. Typically, water samples are collected and transported to an analytical laboratory, where costly radiochemical analyses are performed. To date, there has been very little development of selective radionuclide sensors for alpha- and beta-emitting radionuclides such as 90Sr, 99Tc, and various actinides of interest. The objective of this project is to investigate novel sensor concepts and materials for sensitive and selective determination of beta- and alpha-emitting radionuclide contaminants in water. To meet the requirements for low-level, isotope-specific detection, the proposed sensors are based on radiometric detection. As a means to address the fundamental challenge of the short ranges of beta and alpha particles in water, our overall approach is based on localization of preconcentration/separation chemistries directly on or within the active area of a radioactivity detector. Automated microfluidics is used for sample manipulation and sensor regeneration or renewal. The outcome of these investigations will be the knowledge necessary to choose appropriate chemistries for selective preconcentration of radionuclides from environmental samples, new materials that combine chemical selectivity with scintillating properties, new materials that add chemical selectivity to solid-state diode detectors, new preconcentrating column sensors, and improved instrumentation and signal processing for selective radionuclide sensors. New knowledge will provide the basis for designing effective probes and instrumentation for field and in situ measurements.

  9. Radionuclide Sensors for Water Monitoring

    SciTech Connect (OSTI)

    Grate, Jay W.; Egorov, Oleg B.; DeVol, Timothy A.

    2004-06-29T23:59:59.000Z

    Radionuclide contamination in the soil and groundwater at U.S. Department of Energy (DOE) sites is a severe problem that requires monitoring and remediation. Radionuclide measurement techniques are needed to monitor surface waters, groundwater, and process waters. Typically, water samples are collected and transported to an analytical laboratory, where costly radiochemical analyses are performed. To date, there has been very little development of selective radionuclide sensors for alpha- and beta-emitting radionuclides such as 90Sr, 99Tc, and various actinides of interest. The objective of this project is to investigate novel sensor concepts and materials for sensitive and selective determination of beta- and alpha-emitting radionuclide contaminants in water. To meet the requirements for low-level, isotope-specific detection, the proposed sensors are based on radiometric detection. As a means to address the fundamental challenge of the short ranges of beta and alpha particle s in water, our overall approach is based on localization of preconcentration/separation chemistries directly on or within the active area of a radioactivity detector. Automated microfluidics is used for sample manipulation and sensor regeneration or renewal. The outcome of these investigations will be the knowledge necessary to choose appropriate chemistries for selective preconcentration of radionuclides from environmental samples, new materials that combine chemical selectivity with scintillating properties, new materials that add chemical selectivity to solid-state diode detectors, new preconcentrating column sensors, and improved instrumentation and signal processing for selective radionuclide sensors. New knowledge will provide the basis for designing effective probes and instrumentation for field and in situ measurements.

  10. Building Adaptable Sensor Networks with Sensor Cubes

    E-Print Network [OSTI]

    Roussos, George

    of layers allows easy experiments, upgrades and extensions Small-scale sensor network Example sensor module- world network algorithm and power management behavior · Results from small scale tests can be compared (short packets and high bit rate reduce collision probability); Transmitter's MAC table logic: Small

  11. Evaluation of Bare Ground on Rangelands using Unmanned Aerial Vehicles

    SciTech Connect (OSTI)

    Robert P. Breckenridge; Maxine Dakins

    2011-01-01T23:59:59.000Z

    Attention is currently being given to methods that assess the ecological condition of rangelands throughout the United States. There are a number of different indicators that assess ecological condition of rangelands. Bare Ground is being considered by a number of agencies and resource specialists as a lead indicator that can be evaluated over a broad area. Traditional methods of measuring bare ground rely on field technicians collecting data along a line transect or from a plot. Unmanned aerial vehicles (UAVs) provide an alternative to collecting field data, can monitor a large area in a relative short period of time, and in many cases can enhance safety and time required to collect data. In this study, both fixed wing and helicopter UAVs were used to measure bare ground in a sagebrush steppe ecosystem. The data were collected with digital imagery and read using the image analysis software SamplePoint. The approach was tested over seven different plots and compared against traditional field methods to evaluate accuracy for assessing bare ground. The field plots were located on the Idaho National Laboratory (INL) site west of Idaho Falls, Idaho in locations where there is very little disturbance by humans and the area is grazed only by wildlife. The comparison of fixed-wing and helicopter UAV technology against field estimates shows good agreement for the measurement of bare ground. This study shows that if a high degree of detail and data accuracy is desired, then a helicopter UAV may be a good platform. If the data collection objective is to assess broad-scale landscape level changes, then the collection of imagery with a fixed-wing system is probably more appropriate.

  12. Fiber optic geophysical sensors

    DOE Patents [OSTI]

    Homuth, Emil F. (Los Alamos, NM)

    1991-01-01T23:59:59.000Z

    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.

  13. Digital Sensor Technology

    SciTech Connect (OSTI)

    Ted Quinn; Jerry Mauck; Richard Bockhorst; Ken Thomas

    2013-07-01T23:59:59.000Z

    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.

  14. Giant magnetoresistive sensor

    DOE Patents [OSTI]

    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

    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.

  15. active magnetic regenerative: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    by this sensor synchronized with the electric activity of the electrocardiogram (ECG). The shape of the magnetic wave was largely altered by shifting the sensor position...

  16. Sensor system scaling issues

    SciTech Connect (OSTI)

    Canavan, G.H.

    1996-07-01T23:59:59.000Z

    A model for IR sensor performance is used to compare estimates of sensor cost effectiveness. Although data from aircraft sensors indicate a weaker scaling, their agreement is adequate to support the assessment of the benefits of operating up to the maximum altitude of most current UAVs.

  17. Sensors for Environmental Observatories

    E-Print Network [OSTI]

    Hamilton, Michael P.

    Sensors for Environmental Observatories Report of the NSF-Sponsored Workshop December 2004 #12 States of America. 2005. #12;Sensors for Environmental Observatories Report of the NSF Sponsored Workshop sensor technology and the networks that collect data from them. Present work clearly demonstrates

  18. Automotive vehicle sensors

    SciTech Connect (OSTI)

    Sheen, S.H.; Raptis, A.C.; Moscynski, M.J.

    1995-09-01T23:59:59.000Z

    This report is an introduction to the field of automotive vehicle sensors. It contains a prototype data base for companies working in automotive vehicle sensors, as well as a prototype data base for automotive vehicle sensors. A market analysis is also included.

  19. New functional polymers for sensors, smart materials and solar cells

    E-Print Network [OSTI]

    Lobez Comeras, Jose Miguel

    2012-01-01T23:59:59.000Z

    Organic polymers can be used as the active component of sensors, smart materials, chemical-delivery systems and the active layer of solar cells. The rational design and modification of the chemical structure of polymers ...

  20. Oscillatory motion based measurement method and sensor for measuring wall shear stress due to fluid flow

    DOE Patents [OSTI]

    Armstrong, William D. (Laramie, WY); Naughton, Jonathan (Laramie, WY); Lindberg, William R. (Laramie, WY)

    2008-09-02T23:59:59.000Z

    A shear stress sensor for measuring fluid wall shear stress on a test surface is provided. The wall shear stress sensor is comprised of an active sensing surface and a sensor body. An elastic mechanism mounted between the active sensing surface and the sensor body allows movement between the active sensing surface and the sensor body. A driving mechanism forces the shear stress sensor to oscillate. A measuring mechanism measures displacement of the active sensing surface relative to the sensor body. The sensor may be operated under periodic excitation where changes in the nature of the fluid properties or the fluid flow over the sensor measurably changes the amplitude or phase of the motion of the active sensing surface, or changes the force and power required from a control system in order to maintain constant motion. The device may be operated under non-periodic excitation where changes in the nature of the fluid properties or the fluid flow over the sensor change the transient motion of the active sensor surface or change the force and power required from a control system to maintain a specified transient motion of the active sensor surface.

  1. Preprint version 2011 IEEE International Conference on Robotics and Automation, Shanghai, CN Haptic Teleoperation of Multiple Unmanned Aerial Vehicles

    E-Print Network [OSTI]

    Preprint version 2011 IEEE International Conference on Robotics and Automation, Shanghai, CN Haptic Teleoperation of Multiple Unmanned Aerial Vehicles over the Internet Dongjun Lee, Antonio Franchi, Paolo Robuffo control framework for multiple unmanned aerial vehicles (UAVs) over the Internet, consisting of the three

  2. Collaborative Exploration with a Micro Aerial Vehicle: A Novel Interaction Method for Controlling a MAV with a Hand-Held Device

    E-Print Network [OSTI]

    Pitman, David

    2012-01-01T23:59:59.000Z

    In order to collaboratively explore an environment with a Micro Aerial Vehicle (MAV), an operator needs a mobile interface, which can support the operators divided attention. To this end, we developed the Micro Aerial ...

  3. Numerical Simulation and Laboratory Testing of Time-Frequency MUSIC Beamforming for Identifying Continuous and Impulsive Ground Targets from a Mobile Aerial Platform

    E-Print Network [OSTI]

    Silva, Ramon Alejandro

    2013-04-25T23:59:59.000Z

    When a microphone array is mounted on a mobile aerial platform, such as an unmanned aerial vehicle (UAV), most existing beamforming methods cannot be used to adequately identify continuous and impulsive ground. Here, numerical simulation results...

  4. Unattended ground sensor situation assessment workstation

    SciTech Connect (OSTI)

    Jeppesen, D.; Trellue, R.

    1997-04-01T23:59:59.000Z

    Effective utilization of unattended ground sensors (UGSs) in a theater reconnaissance, surveillance, target acquisition, and kill assessment environment requires that a human operator be able to interpret, and collectively assess, the significance of real time data obtained from UGS emplacements over large geographical regions of interest. The products of this UGS data interpretation and assessment activity can then be used in the decision support process for command level evaluation of appropriate courses of action. Advancements in both sensor hardware technology and in software systems and processing technology have enabled the development of practical real time situation assessment capabilities based upon information from unattended ground sensors. A decision support workstation that employs rule-based expert system processing of reports from unattended ground sensors is described. The primary goal of this development activity is to produce a suite of software to track vehicles using data from unattended ground sensors. The situational assessment products from this system have stand-alone utility, but are also intended to provide cueing support for overhead sensors and supplementary feeds to all-source fusion centers. The conceptual framework, developmental architecture, and demonstration field tests of the system are described.

  5. Working Group Report: Sensors

    SciTech Connect (OSTI)

    Artuso, M.; et al.,

    2013-10-18T23:59:59.000Z

    Sensors play a key role in detecting both charged particles and photons for all three frontiers in Particle Physics. The signals from an individual sensor that can be used include ionization deposited, phonons created, or light emitted from excitations of the material. The individual sensors are then typically arrayed for detection of individual particles or groups of particles. Mounting of new, ever higher performance experiments, often depend on advances in sensors in a range of performance characteristics. These performance metrics can include position resolution for passing particles, time resolution on particles impacting the sensor, and overall rate capabilities. In addition the feasible detector area and cost frequently provides a limit to what can be built and therefore is often another area where improvements are important. Finally, radiation tolerance is becoming a requirement in a broad array of devices. We present a status report on a broad category of sensors, including challenges for the future and work in progress to solve those challenges.

  6. Capacitive chemical sensor

    DOE Patents [OSTI]

    Manginell, Ronald P; Moorman, Matthew W; Wheeler, David R

    2014-05-27T23:59:59.000Z

    A microfabricated capacitive chemical sensor can be used as an autonomous chemical sensor or as an analyte-sensitive chemical preconcentrator in a larger microanalytical system. The capacitive chemical sensor detects changes in sensing film dielectric properties, such as the dielectric constant, conductivity, or dimensionality. These changes result from the interaction of a target analyte with the sensing film. This capability provides a low-power, self-heating chemical sensor suitable for remote and unattended sensing applications. The capacitive chemical sensor also enables a smart, analyte-sensitive chemical preconcentrator. After sorption of the sample by the sensing film, the film can be rapidly heated to release the sample for further analysis. Therefore, the capacitive chemical sensor can optimize the sample collection time prior to release to enable the rapid and accurate analysis of analytes by a microanalytical system.

  7. Contact stress sensor

    DOE Patents [OSTI]

    Kotovsky, Jack

    2014-02-11T23:59:59.000Z

    A method for producing a contact stress sensor that includes one or more MEMS fabricated sensor elements, where each sensor element of includes a thin non-recessed portion, a recessed portion and a pressure sensitive element adjacent to the recessed portion. An electric circuit is connected to the pressure sensitive element. The circuit includes a pressure signal circuit element configured to provide a signal upon movement of the pressure sensitive element.

  8. Remote electrochemical sensor

    DOE Patents [OSTI]

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

    1997-01-01T23:59:59.000Z

    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.

  9. Fiber optic geophysical sensors

    DOE Patents [OSTI]

    Homuth, E.F.

    1991-03-19T23:59:59.000Z

    A fiber optic geophysical sensor is described 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 figures.

  10. BASIC CONTROL FOR FOUR ROTOR AUTONOMOUS AERIAL AGENT JONATHAN MCLEAN, CONNECTICUT COLLEGE, USA,

    E-Print Network [OSTI]

    Parker, Gary B.

    more difficult to control, requiring minute adjustments to individual rotor blades, as well as tailBASIC CONTROL FOR FOUR ROTOR AUTONOMOUS AERIAL AGENT JONATHAN MCLEAN, CONNECTICUT COLLEGE, USA platform is required. Our four-rotor platform provides researchers with a inexpensive, fully scalable test

  11. ReseaRch at the University of Maryland Unmanned Aerial Vehicle Technology

    E-Print Network [OSTI]

    Hill, Wendell T.

    -wing vehicles that can monitor atmospheric data without using fossil fuels. J. Sean Humbert tests autonomous varieties of autonomous aerial vehicles, and new ways of utilizing them, offer the potential for making for autonomous bio-inspired micro-vehicles capable of penetrating caves and tunnels, and of reducing the human

  12. Aerial Imaging of Fluorescent Dye in the Near Shore DAVID B. CLARK

    E-Print Network [OSTI]

    Boss, Emmanuel S.

    Aerial Imaging of Fluorescent Dye in the Near Shore DAVID B. CLARK Woods Hole Oceanographic) dye in turbid and optically deep water. Tracer releases near the shoreline of an ocean beach and near of upwelling radiance near the Rhodamine WT excitation and emission peaks varies linearly with the in situ dye

  13. A Practical Visual Servo Control for an Unmanned Aerial N. GUENARD, T. HAMEL, and R. MAHONY

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    with respect to the robot and results in a Cartesian motion planning problem. This approach requires dynamics of the system using control Lyapunov function design techniques. Experimental results on a quad and performance of the proposed control strategy. Keywords: Image based visual servo (IBVS), Aerial Robotic

  14. Autonomous Localization of 1/R2 Sources Using an Aerial Platform

    E-Print Network [OSTI]

    Kochersberger, Kevin

    Autonomous Localization of 1/R2 Sources Using an Aerial Platform Eric T. Brewer Thesis submitted, Autonomous,VTOL,UAV Copyright 2009, Eric T. Brewer #12;Autonomous Localization of 1/R2 Sources Using such as reconnaissance or search and rescue. To this end, this thesis provides autonomous localization and mapping tools

  15. An aerial radiological survey of the Salmon Site and surrounding area, Lamar County, Mississippi

    SciTech Connect (OSTI)

    Kernan, W.J.

    1994-05-01T23:59:59.000Z

    An aerial radiological survey was conducted over the former Atomic Energy Commission Test Site at the Salmon Site and surrounding area between April 20 and May 1, 1992. The Salmon Site is located in Lamar County, Mississippi, approximately 20 miles southwest of Hattiesburg, Mississippi. The purpose of the survey was to measure and document the gamma-ray environment of the Salmon Site and adjacent lands. A contour map showing gamma radiation exposure rates at 1 meter above ground level was constructed from the aerial data and overlaid on a rectified aerial photograph of the area. The exposure rates within the area are between 5 and 8 {mu}R/h. The reported exposure rates include a cosmic-ray contribution estimated to be 3.7 {mu}R/h. Radionuclide assays of soil samples and in situ measurements, taken with a pressurized ion chamber and a high-purity germanium detector, were obtained at 4 locations within the survey boundaries. These measurements were taken in support of and are in agreement with the aerial data.

  16. Wind-Energy based Path Planning For Electric Unmanned Aerial Vehicles Using Markov Decision Processes

    E-Print Network [OSTI]

    Smith, Ryan N.

    Wind-Energy based Path Planning For Electric Unmanned Aerial Vehicles Using Markov Decision wind-energy is one possible way to ex- tend flight duration for Unmanned Arial Vehicles. Wind-energy sources of wind energy available to exploit for this problem [5]: 1) Vertical air motion, such as thermal

  17. Optimal Complete Terrain Coverage using an Unmanned Aerial Vehicle Anqi Xu, Chatavut Viriyasuthee, and Ioannis Rekleitis

    E-Print Network [OSTI]

    Rekleitis, Ioannis

    in a bounded environment, while: · avoiding a set of obstacle regions with arbitrary shape · preventing from of coverage using an aerial vehicle has many applications, including: environmental inspection, search] for the general class of non-holonomic robots. We compute a set of waypoints outlining the desired cover- age path

  18. Complete Residential Urban Area Reconstruction from Dense Aerial LiDAR Point Clouds

    E-Print Network [OSTI]

    Shahabi, Cyrus

    Complete Residential Urban Area Reconstruction from Dense Aerial LiDAR Point Clouds Qian-Yi Zhou area modeling and residential area modeling is that the latter usually con- tains rich vegetation. Thus representing the 3D urban reality of residential areas. Keywords: urban modeling, LiDAR, residential area

  19. Unmanned Aerial Vehicle (UAV) Dynamic-Tracking Directional Wireless Antennas for Low Powered Applications that Require Reliable Extended Range Operations in Time Critical Scenarios

    SciTech Connect (OSTI)

    Scott G. Bauer; Matthew O. Anderson; James R. Hanneman

    2005-10-01T23:59:59.000Z

    The proven value of DOD Unmanned Aerial Vehicles (UAVs) will ultimately transition to National and Homeland Security missions that require real-time aerial surveillance, situation awareness, force protection, and sensor placement. Public services first responders who routinely risk personal safety to assess and report a situation for emergency actions will likely be the first to benefit from these new unmanned technologies. Packable or Portable small class UAVs will be particularly useful to the first responder. They require the least amount of training, no fixed infrastructure, and are capable of being launched and recovered from the point of emergency. All UAVs require wireless communication technologies for real- time applications. Typically on a small UAV, a low bandwidth telemetry link is required for command and control (C2), and systems health monitoring. If the UAV is equipped with a real-time Electro-Optical or Infrared (EO/Ir) video camera payload, a dedicated high bandwidth analog/digital link is usually required for reliable high-resolution imagery. In most cases, both the wireless telemetry and real-time video links will be integrated into the UAV with unity gain omni-directional antennas. With limited on-board power and payload capacity, a small UAV will be limited with the amount of radio-frequency (RF) energy it transmits to the users. Therefore, packable and portable UAVs will have limited useful operational ranges for first responders. This paper will discuss the limitations of small UAV wireless communications. The discussion will present an approach of utilizing a dynamic ground based real-time tracking high gain directional antenna to provide extend range stand-off operation, potential RF channel reuse, and assured telemetry and data communications from low-powered UAV deployed wireless assets.

  20. Energy Conservation in Sensor and

    E-Print Network [OSTI]

    Stojmenovic, Ivan

    Chapter 4 Energy Conservation in Sensor and Sensor-Actuator Networks Ivan Stojmenovic 4 wireless network, and must work unattended. The limited energy budget at the individual sensor level

  1. Adaptive Sampling for Wireless Sensor Networks Rebecca M. Willett

    E-Print Network [OSTI]

    Willett, Rebecca

    net- work that can significantly reduce energy consumption. Under a piecewise smooth field assumption activating only n3/4 of the sensors in the net- work. This approach can save significant energy compared acquisition, and communication contribute significantly to the energy ex- penditure of wireless sensor

  2. Modeling Human Behavior from Simple Sensors in the Home

    E-Print Network [OSTI]

    Canny, John

    Modeling Human Behavior from Simple Sensors in the Home Ryan Aipperspach, Elliot Cohen, and John {ryanaip, jfc}@cs.berkeley.edu, emcohen3@berkeley.edu Abstract. Pervasive sensors in the home have a variety of applications including energy minimization, activity monitoring for elders, and tutors

  3. Sensors and actuators 1990

    SciTech Connect (OSTI)

    Not Available

    1990-01-01T23:59:59.000Z

    This book contains the proceedings on sensors and actuators 1990. Topics covered include: Hot wire air flow meter for engine control systems, A technique for the real-time estimation of air-fuel ratio using molecular weight ratios, combustion knock sensing: Sensor selection and application issues, and An indirect sensing technique for closed-loop diesel fuel quantity control.

  4. Fabrication of 3D Silicon Sensors

    SciTech Connect (OSTI)

    Kok, A.; Hansen, T.E.; Hansen, T.A.; Lietaer, N.; Summanwar, A.; /SINTEF, Oslo; Kenney, C.; Hasi, J.; /SLAC; Da Via, C.; /Manchester U.; Parker, S.I.; /Hawaii U.

    2012-06-06T23:59:59.000Z

    Silicon sensors with a three-dimensional (3-D) architecture, in which the n and p electrodes penetrate through the entire substrate, have many advantages over planar silicon sensors including radiation hardness, fast time response, active edge and dual readout capabilities. The fabrication of 3D sensors is however rather complex. In recent years, there have been worldwide activities on 3D fabrication. SINTEF in collaboration with Stanford Nanofabrication Facility have successfully fabricated the original (single sided double column type) 3D detectors in two prototype runs and the third run is now on-going. This paper reports the status of this fabrication work and the resulted yield. The work of other groups such as the development of double sided 3D detectors is also briefly reported.

  5. We propose a wearable PIR thermal sensor system that can help users to perceive the

    E-Print Network [OSTI]

    Zhu, Zhigang

    We propose a wearable PIR thermal sensor system that can help users to perceive the surrounding environment from a thermal perspective. Wireless PIR sensor network technology has been developed to track and recognize multiple moving human subjects, as well as understand their activities. However, the PIR sensor

  6. Towards optimal energy-quality tradeoff in tracking via sensor Alessio Benavoli and Luigi Chisci

    E-Print Network [OSTI]

    Chisci, Luigi

    proportional to the number of active sensors, energy efficiency calls for the implementation, inside about the current sensor energy status. This is certainly efficient in terms of tracking qualityTowards optimal energy-quality tradeoff in tracking via sensor networks Alessio Benavoli and Luigi

  7. Renewable-reagent electrochemical sensor

    DOE Patents [OSTI]

    Wang, J.; Olsen, K.B.

    1999-08-24T23:59:59.000Z

    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.

  8. Renewable-reagent electrochemical sensor

    DOE Patents [OSTI]

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

    1999-01-01T23:59:59.000Z

    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).

  9. Remote electrochemical sensor

    DOE Patents [OSTI]

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

    1997-10-14T23:59:59.000Z

    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.

  10. Electrochemical micro sensor

    DOE Patents [OSTI]

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

    1989-09-12T23:59:59.000Z

    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.

  11. Wireless passive radiation sensor

    DOE Patents [OSTI]

    Pfeifer, Kent B; Rumpf, Arthur N; Yelton, William G; Limmer, Steven J

    2013-12-03T23:59:59.000Z

    A novel measurement technique is employed using surface acoustic wave (SAW) devices, passive RF, and radiation-sensitive films to provide a wireless passive radiation sensor that requires no batteries, outside wiring, or regular maintenance. The sensor is small (<1 cm.sup.2), physically robust, and will operate unattended for decades. In addition, the sensor can be insensitive to measurement position and read distance due to a novel self-referencing technique eliminating the need to measure absolute responses that are dependent on RF transmitter location and power.

  12. Improving Rangeland Monitoring and Assessment: Integrating Remote Sensing, GIS, and Unmanned Aerial Vehicle Systems

    SciTech Connect (OSTI)

    Robert Paul Breckenridge

    2007-05-01T23:59:59.000Z

    Creeping environmental changes are impacting some of the largest remaining intact parcels of sagebrush steppe ecosystems in the western United States, creating major problems for land managers. The Idaho National Laboratory (INL), located in southeastern Idaho, is part of the sagebrush steppe ecosystem, one of the largest ecosystems on the continent. Scientists at the INL and the University of Idaho have integrated existing field and remotely sensed data with geographic information systems technology to analyze how recent fires on the INL have influenced the current distribution of terrestrial vegetation. Three vegetation mapping and classification systems were used to evaluate the changes in vegetation caused by fires between 1994 and 2003. Approximately 24% of the sagebrush steppe community on the INL was altered by fire, mostly over a 5-year period. There were notable differences between methods, especially for juniper woodland and grasslands. The Anderson system (Anderson et al. 1996) was superior for representing the landscape because it includes playa/bare ground/disturbed area and sagebrush steppe on lava as vegetation categories. This study found that assessing existing data sets is useful for quantifying fire impacts and should be helpful in future fire and land use planning. The evaluation identified that data from remote sensing technologies is not currently of sufficient quality to assess the percentage of cover. To fill this need, an approach was designed using both helicopter and fixed wing unmanned aerial vehicles (UAVs) and image processing software to evaluate six cover types on field plots located on the INL. The helicopter UAV provided the best system compared against field sampling, but is more dangerous and has spatial coverage limitations. It was reasonably accurate for dead shrubs and was very good in assessing percentage of bare ground, litter and grasses; accuracy for litter and shrubs is questionable. The fixed wing system proved to be feasible and can collect imagery for very large areas in a short period of time. It was accurate for bare ground and grasses. Both UAV systems have limitations, but these will be reduced as the technology advances. In both cases, the UAV systems collected data at a much faster rate than possible on the ground. The study concluded that improvements in automating the image processing efforts would greatly improve use of the technology. In the near future, UAV technology may revolutionize rangeland monitoring in the same way Global Positioning Systems have affected navigation while conducting field activities.

  13. Aircraft as a meteorological sensor

    E-Print Network [OSTI]

    Haak, Hein

    Meteorological Institute 2 | The aircraft as a meteorological sensor Photo cover: A KLM Airbus A330-200 landsAircraft as a meteorological sensor Using Mode-S Enhanced Surveillance data to derive upper air Meteorological Institute 3 | The aircraft as a meteorological sensor Aircraft as a meteorological sensor Using

  14. Movement behaviour of traditionally managed cattle in the Eastern Province of Zambia: investigations using two-dimensional motion sensors

    E-Print Network [OSTI]

    Lubaba, Caesar Himbayi

    2011-06-27T23:59:59.000Z

    Two-dimensional (2-D) motion sensors are activity motion sensors that use electronic accelerometers to record the lying, standing and walking behaviour of animals. They were used in this study with the aim of monitoring and quantifying the movement...

  15. Geographically distributed environmental sensor system

    DOE Patents [OSTI]

    French, Patrick; Veatch, Brad; O'Connor, Mike

    2006-10-03T23:59:59.000Z

    The present invention is directed to a sensor network that includes a number of sensor units and a base unit. The base station operates in a network discovery mode (in which network topology information is collected) in a data polling mode (in which sensed information is collected from selected sensory units). Each of the sensor units can include a number of features, including an anemometer, a rain gauge, a compass, a GPS receiver, a barometric pressure sensor, an air temperature sensor, a humidity sensor, a level, and a radiant temperature sensor.

  16. Complex pendulum biomass sensor

    DOE Patents [OSTI]

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

    2007-12-25T23:59:59.000Z

    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.

  17. Remote Sensor Placement

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    developed to place the sensor nodes in the field. Contact Institute Director Charles Farrar (505) 663-5330 Email UCSD EI Director Michael Todd (858) 534-5951 Professional Staff...

  18. Integrated optical sensor

    DOE Patents [OSTI]

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

    1994-01-04T23:59:59.000Z

    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.

  19. Integrated optical sensor

    DOE Patents [OSTI]

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

    1994-01-01T23:59:59.000Z

    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.

  20. Capacitance pressure sensor

    DOE Patents [OSTI]

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

    2000-01-01T23:59:59.000Z

    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).

  1. Modular sensor network node

    DOE Patents [OSTI]

    Davis, Jesse Harper Zehring (Berkeley, CA); Stark, Jr., Douglas Paul (Tracy, CA); Kershaw, Christopher Patrick (Hayward, CA); Kyker, Ronald Dean (Livermore, CA)

    2008-06-10T23:59:59.000Z

    A distributed wireless sensor network node is disclosed. The wireless sensor network node includes a plurality of sensor modules coupled to a system bus and configured to sense a parameter. The parameter may be an object, an event or any other parameter. The node collects data representative of the parameter. The node also includes a communication module coupled to the system bus and configured to allow the node to communicate with other nodes. The node also includes a processing module coupled to the system bus and adapted to receive the data from the sensor module and operable to analyze the data. The node also includes a power module connected to the system bus and operable to generate a regulated voltage.

  2. Magnetic infrasound sensor

    DOE Patents [OSTI]

    Mueller, Fred M. (Los Alamos, NM); Bronisz, Lawrence (Los Alamos, NM); Grube, Holger (Los Alamos, NM); Nelson, David C. (Santa Fe, NM); Mace, Jonathan L. (Los Alamos, NM)

    2006-11-14T23:59:59.000Z

    A magnetic infrasound sensor is produced by constraining a permanent magnet inside a magnetic potential well above the surface of superconducting material. The magnetic infrasound sensor measures the position or movement of the permanent magnet within the magnetic potential well, and interprets the measurements. Infrasound sources can be located and characterized by combining the measurements from one or more infrasound sensors. The magnetic infrasound sensor can be tuned to match infrasound source types, resulting in better signal-to-noise ratio. The present invention can operate in frequency modulation mode to improve sensitivity and signal-to-noise ratio. In an alternate construction, the superconductor can be levitated over a magnet or magnets. The system can also be driven, so that time resolved perturbations are sensed, resulting in a frequency modulation version with improved sensitivity and signal-to-noise ratio.

  3. NOx Sensor Development

    Broader source: Energy.gov (indexed) [DOE]

    needed to meet emission targets and enable widespread use of diesel vehicles with better fuel economies: We are developing a novel sensor with the potential to meet OEM cost and...

  4. Aerial Neutron Detection: Neutron Signatures for Nonproliferation and Emergency Response Applications

    SciTech Connect (OSTI)

    Maurer, Richard J.; Stampahar, Thomas G.; Smith, Ethan X.; Mukhopadhyay, Sanjoy; Wolff, Ronald S.; Rourke, Timothy J.; LeDonne, Jeffrey P.; Avaro, Emanuele; Butler, D. Andre; Borders, Kevin L.; Stampahar, Jezabel; Schuck, William H.; Selfridge, Thomas L.; McKissack, Thomas M.; Duncan, William W.; Hendricks, Thane J.

    2012-10-17T23:59:59.000Z

    From 2007 to the present, the Remote Sensing Laboratory has been conducting a series of studies designed to expand our fundamental understanding of aerial neutron detection with the goal of designing an enhanced sensitivity detection system for long range neutron detection. Over 35 hours of aerial measurements in a helicopter were conducted for a variety of neutron emitters such as neutron point sources, a commercial nuclear power reactor, nuclear reactor spent fuel in dry cask storage, depleted uranium hexafluoride and depleted uranium metal. The goals of the project were to increase the detection sensitivity of our instruments such that a 5.4 104 neutron/second source could be detected at 100 feet above ground level at a speed of 70 knots and to enhance the long-range detection sensitivity for larger neutron sources, i.e., detection ranges above 1000 feet. In order to increase the sensitivity of aerial neutron detection instruments, it is important to understand the dynamics of the neutron background as a function of altitude. For aerial neutron detection, studies have shown that the neutron background primarily originates from above the aircraft, being produced in the upper atmosphere by galactic cosmic-ray interactions with air molecules. These interactions produce energetic neutrons and charged particles that cascade to the earths surface, producing additional neutrons in secondary collisions. Hence, the neutron background increases as a function of altitude which is an impediment to long-range neutron detection. In order to increase the sensitivity for long range detection, it is necessary to maintain a low neutron background as a function of altitude. Initial investigations show the variation in the neutron background can be decreased with the application of a cosmic-ray shield. The results of the studies along with a representative data set are presented.

  5. Digital classification of composite format color-infrared aerial video imagery

    E-Print Network [OSTI]

    Palmer, Rebecca Anne

    2012-06-07T23:59:59.000Z

    ) for large-area surveys down to individual crown/species identification for intensive studies. Befort (1986) used large-scale (1:1, 000) normal color aerial sampling photography to manually classify forest sites located in northern Idaho and eastern... may result in classifications comparable or even less accurate than 80-meter resolution products (Latty and Hoffer, 1980; Markham and Townshend, 1981). Nelson et al. (1984) achieved 50-60% classification accuracy for 13 land cover classes for a...

  6. Thermal microphotonic sensor and sensor array

    DOE Patents [OSTI]

    Watts, Michael R. (Albuquerque, NM); Shaw, Michael J. (Tijeras, NM); Nielson, Gregory N. (Albuquerque, NM); Lentine, Anthony L. (Albuquerque, NM)

    2010-02-23T23:59:59.000Z

    A thermal microphotonic sensor is disclosed for detecting infrared radiation using heat generated by the infrared radiation to shift the resonant frequency of an optical resonator (e.g. a ring resonator) to which the heat is coupled. The shift in the resonant frequency can be determined from light in an optical waveguide which is evanescently coupled to the optical resonator. An infrared absorber can be provided on the optical waveguide either as a coating or as a plate to aid in absorption of the infrared radiation. In some cases, a vertical resonant cavity can be formed about the infrared absorber to further increase the absorption of the infrared radiation. The sensor can be formed as a single device, or as an array for imaging the infrared radiation.

  7. Distributed Sensor Coordination for Advanced Energy Systems

    SciTech Connect (OSTI)

    Tumer, Kagan

    2013-07-31T23:59:59.000Z

    The ability to collect key system level information is critical to the safe, efficient and reli- able operation of advanced energy systems. With recent advances in sensor development, it is now possible to push some level of decision making directly to computationally sophisticated sensors, rather than wait for data to arrive to a massive centralized location before a decision is made. This type of approach relies on networked sensors (called agents from here on) to actively collect and process data, and provide key control deci- sions to significantly improve both the quality/relevance of the collected data and the as- sociating decision making. The technological bottlenecks for such sensor networks stem from a lack of mathematics and algorithms to manage the systems, rather than difficulties associated with building and deploying them. Indeed, traditional sensor coordination strategies do not provide adequate solutions for this problem. Passive data collection methods (e.g., large sensor webs) can scale to large systems, but are generally not suited to highly dynamic environments, such as ad- vanced energy systems, where crucial decisions may need to be reached quickly and lo- cally. Approaches based on local decisions on the other hand cannot guarantee that each agent performing its task (maximize an agent objective) will lead to good network wide solution (maximize a network objective) without invoking cumbersome coordination rou- tines. There is currently a lack of algorithms that will enable self-organization and blend the efficiency of local decision making with the system level guarantees of global decision making, particularly when the systems operate in dynamic and stochastic environments. In this work we addressed this critical gap and provided a comprehensive solution to the problem of sensor coordination to ensure the safe, reliable, and robust operation of advanced energy systems. The differentiating aspect of the proposed work is in shift- ing the focus towards what to observe rather than how to observe in large sensor networks, allowing the agents to actively determine both the structure of the network and the relevance of the information they are seeking to collect. In addition to providing an implicit coordination mechanism, this approach allows the system to be reconfigured in response to changing needs (e.g., sudden external events requiring new responses) or changing sensor network characteristics (e.g., sudden changes to plant condition). Outcome Summary: All milestones associated with this project have been completed. In particular, private sensor objective functions were developed which are aligned with the global objective function, sensor effectiveness has been improved by using sensor teams, system efficiency has been improved by 30% using difference evaluation func- tions, we have demonstrated system reconfigurability for 20% changes in system con- ditions, we have demonstrated extreme scalability of our proposed algorithm, we have demonstrated that sensor networks can overcome disruptions of up to 20% in network conditions, and have demonstrated system reconfigurability to 20% changes in system conditions in hardware-based simulations. This final report summarizes how each of these milestones was achieved, and gives insight into future research possibilities past the work which has been completed. The following publications support these milestones [6, 8, 9, 10, 16, 18, 19].

  8. Aerial and ground-based inspections of mine sites in the Western U.S.-implications for on-site inspection overflights, under the CTBT

    SciTech Connect (OSTI)

    Heuze, F.E.

    1997-07-01T23:59:59.000Z

    The verification regime of the Comprehensive Test Ban Treaty (CTBT) provides for the possibility of On-Site Inspections (OSI`s) to resolve questions concerning suspicious events which may have been clandestine nuclear tests. Overflights by fixed-wing or rotary-wing aircraft, as part of an OSI, are permitted by the Treaty. These flights are intended to facilitate the narrowing of the inspection area, from an initial permissible 1000 km{sup 2}, and to help select the locations to deploy observers and ground-based sensors (seismic, radionuclides, . . .) Because of the substantial amount of seismicity generated by mining operations worldwide, it is expected that mine sites and mine districts would be prime candidates for OSI`S. To gain experience in this context, a number of aerial and ground-based mine site inspections have been performed in the Western U.S. by Lawrence Livermore National Laboratory since 1994. These inspections are part of a broad range of CTBT mining-related projects conducted by the U.S. Department of Energy and its National Laboratories. The various sites are described next, and inferences are made concerning CTBT OSI`S. All the mines are legitimate operations, with no implication whatsoever of any clandestine tests.

  9. Sensor Characteristics Reference Guide

    SciTech Connect (OSTI)

    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

    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

  10. Optical displacement sensor

    DOE Patents [OSTI]

    Carr, Dustin W. (Albuquerque, NM)

    2008-04-08T23:59:59.000Z

    An optical displacement sensor is disclosed which uses a vertical-cavity surface-emitting laser (VCSEL) coupled to an optical cavity formed by a moveable membrane and an output mirror of the VCSEL. This arrangement renders the lasing characteristics of the VCSEL sensitive to any movement of the membrane produced by sound, vibrations, pressure changes, acceleration, etc. Some embodiments of the optical displacement sensor can further include a light-reflective diffractive lens located on the membrane or adjacent to the VCSEL to control the amount of lasing light coupled back into the VCSEL. A photodetector detects a portion of the lasing light from the VCSEL to provide an electrical output signal for the optical displacement sensor which varies with the movement of the membrane.

  11. Fiber optic vibration sensor

    DOE Patents [OSTI]

    Dooley, Joseph B. (Harriman, TN); Muhs, Jeffrey D. (Lenoir City, TN); Tobin, Kenneth W. (Harriman, TN)

    1995-01-01T23:59:59.000Z

    A fiber optic vibration sensor utilizes two single mode optical fibers supported by a housing with one optical fiber fixedly secured to the housing and providing a reference signal and the other optical fiber having a free span length subject to vibrational displacement thereof with respect to the housing and the first optical fiber for providing a signal indicative of a measurement of any perturbation of the sensor. Damping or tailoring of the sensor to be responsive to selected levels of perturbation is provided by altering the diameter of optical fibers or by immersing at least a portion of the free span length of the vibration sensing optical fiber into a liquid of a selected viscosity.

  12. Capacitive proximity sensor

    DOE Patents [OSTI]

    Kronberg, James W. (Aiken, SC)

    1994-01-01T23:59:59.000Z

    A proximity sensor based on a closed field circuit. 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.

  13. Chemiresistor urea sensor

    DOE Patents [OSTI]

    Glass, Robert S. (Livermore, CA)

    1997-01-01T23:59:59.000Z

    A sensor to detect and quantify urea in fluids resulting from hemodialysis procedures, and in blood and other body fluids. The sensor is based upon a chemiresistor, which consists of an interdigitated array of metal fingers between which a resistance measured. The interdigitated array is fabricated on a suitable substrate. The surface of the array of fingers is covered with a coating containing the enzyme urease which catalyzes the hydrolysis of urea to form the ammonium ion, the bicarbonate ion, and hydroxide-chemical products which provide the basis for the measured signal. In a typical application, the sensor could be used at bedside, in conjunction with an appropriate electronics/computer system, in order to determine the hemodialysis endpoint. Also, the chemiresistor used to detect urea, can be utilized with a reference chemiresistor which does not contain urease, and connected in a differential measurement arrangement, such that the reference chemiresistor would cancel out any fluctuations due to background effects.

  14. Fiber optic vibration sensor

    DOE Patents [OSTI]

    Dooley, J.B.; Muhs, J.D.; Tobin, K.W.

    1995-01-10T23:59:59.000Z

    A fiber optic vibration sensor utilizes two single mode optical fibers supported by a housing with one optical fiber fixedly secured to the housing and providing a reference signal and the other optical fiber having a free span length subject to vibrational displacement thereof with respect to the housing and the first optical fiber for providing a signal indicative of a measurement of any perturbation of the sensor. Damping or tailoring of the sensor to be responsive to selected levels of perturbation is provided by altering the diameter of optical fibers or by immersing at least a portion of the free span length of the vibration sensing optical fiber into a liquid of a selected viscosity. 2 figures.

  15. Capacitive proximity sensor

    DOE Patents [OSTI]

    Kronberg, J.W.

    1994-05-31T23:59:59.000Z

    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.

  16. Assess the Efficacy of an Aerial Distant Observer Tool Capable of Rapid Analysis of Large Sections of Collector Fields: FY 2008 CSP Milestone Report, September 2008

    SciTech Connect (OSTI)

    Jorgensen, G.; Burkholder, F.; Gray, A.; Wendelin, T.

    2009-02-01T23:59:59.000Z

    We assessed the feasibility of developing an aerial Distant Observer optical characterization tool for collector fields in concentrating solar power plants.

  17. Simultaneous Localization and Mapping for an Unmanned Aerial Vehicle Using Radar and Radio Transmitters; Lokalisering och kartlggning fr en UAV med hjlp av radar och radiosndare.

    E-Print Network [OSTI]

    Dahlin, Alfred

    2014-01-01T23:59:59.000Z

    ?? The Global Positioning System (GPS) is a cornerstone in Unmanned Aerial Vehicle (UAV) navigation and is by far the most common way to obtain (more)

  18. Fluorescent temperature sensor

    DOE Patents [OSTI]

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

    2009-03-03T23:59:59.000Z

    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.

  19. Sensors as Information Transducers

    E-Print Network [OSTI]

    J. David zook; Norbert Schroeder

    2008-04-04T23:59:59.000Z

    This chapter reviews the mechanisms by which sensors gather information from the physical world and transform it into the electronic signals that are used in today's information and control systems. It introduces a new methodology for describing sensing mechanisms based on the process of information flow and applies it to the broad spectrum of sensors, instruments and data input devices in current use. We identify four distinct elemental transduction processes: energy conversion, energy dispersion, energy modulation and modulation of a material property. We posit that these four mechanisms form a complete set for describing information transduction in sensing systems.

  20. Magnetic differential torque sensor

    SciTech Connect (OSTI)

    Lemarquand, V.; Lemarquand, G. [Univ. de Savoie, Annecy-le-Vieux (France)] [Univ. de Savoie, Annecy-le-Vieux (France)

    1995-11-01T23:59:59.000Z

    A new torque sensor structure is presented. The basic idea is a simple torque sensor with a variable magnetic circuit excited by an axially magnetized permanent magnet ring. The circuit is constituted by iron toothed rings, whose teeth relative position changes whenever an applied torque twists the rotating shaft. A Hall probe measures the induction in an airgap where the induction is uniform. The new structure is an association of two previous ones, thus creating a differential system with the related advantages: diminution of thermal drifts, zero mean value for the signal. The new magnetic circuit is studied by calculating equivalent reluctances through energy calculations and by using electrical analogies.

  1. Thin film hydrogen sensor

    DOE Patents [OSTI]

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

    1994-01-01T23:59:59.000Z

    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.

  2. Controlled mobility in sensor networks

    E-Print Network [OSTI]

    Sugihara, Ryo

    2009-01-01T23:59:59.000Z

    K. Gupta. Optimizing energy-latency trade- o? in sensoras Optimizing Energy-Latency Trade-o? in Sensor NetworksK. Gupta, Optimizing Energy-Latency Trade-o? in Sensor

  3. Sensor Fusion for Nuclear Proliferation Activity Monitoring

    SciTech Connect (OSTI)

    Adel Ghanem, Ph D

    2007-03-30T23:59:59.000Z

    The objective of Phase 1 of this STTR project is to demonstrate a Proof-of-Concept (PoC) of the Geo-Rad system that integrates a location-aware SmartTag (made by ZonTrak) and a radiation detector (developed by LLNL). It also includes the ability to transmit the collected radiation data and location information to the ZonTrak server (ZonService). The collected data is further transmitted to a central server at LLNL (the Fusion Server) to be processed in conjunction with overhead imagery to generate location estimates of nuclear proliferation and radiation sources.

  4. Category:Active Sensors | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: EnergyBostonFacilityCascade Sierra SolutionsGeothermalpower.jpg Looking for the

  5. Nanotechnology-Based Electrochemical Sensors for Biomonitoring...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Nanotechnology-Based Electrochemical Sensors for Biomonitoring Chemical Exposures . Nanotechnology-Based Electrochemical Sensors for Biomonitoring Chemical Exposures . Abstract:...

  6. Sensors & Measurement | Clean Energy | ORNL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Systems Research Sustainable Electricity Systems Biology Transportation Clean Energy Home | Science & Discovery | Clean Energy | Research Areas | Sensors & Measurement...

  7. A Wireless Sensor Network Air Pollution Monitoring System

    E-Print Network [OSTI]

    Khedo, Kavi K; Mungur, Avinash; Mauritius, University of; Mauritius,; 10.5121/ijwmn.2010.2203

    2010-01-01T23:59:59.000Z

    Sensor networks are currently an active research area mainly due to the potential of their applications. In this paper we investigate the use of Wireless Sensor Networks (WSN) for air pollution monitoring in Mauritius. With the fast growing industrial activities on the island, the problem of air pollution is becoming a major concern for the health of the population. We proposed an innovative system named Wireless Sensor Network Air Pollution Monitoring System (WAPMS) to monitor air pollution in Mauritius through the use of wireless sensors deployed in huge numbers around the island. The proposed system makes use of an Air Quality Index (AQI) which is presently not available in Mauritius. In order to improve the efficiency of WAPMS, we have designed and implemented a new data aggregation algorithm named Recursive Converging Quartiles (RCQ). The algorithm is used to merge data to eliminate duplicates, filter out invalid readings and summarise them into a simpler form which significantly reduce the amount of dat...

  8. Open Standards for Sensor Information Processing

    SciTech Connect (OSTI)

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

    2009-07-01T23:59:59.000Z

    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).

  9. Future Directions for Magnetic Sensors

    E-Print Network [OSTI]

    and Engineering Laboratory Magnetic tunnel junction (MTJ) sensors are rapidly becoming the technology of choiceFuture Directions for Magnetic Sensors: HYBRIDMATERIALS Our goal is to develop the scientific expertise needed to allow modeling and simulation to become the driving force in improving magnetic sensors

  10. Sensor system for web inspection

    DOE Patents [OSTI]

    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

    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.

  11. Using Sensor Technology to Augment Traditional Healthcare Marilyn J. Rantz, Marjorie Skubic, Member, IEEE and Steven J. Miller

    E-Print Network [OSTI]

    He, Zhihai "Henry"

    motion, door sensors and load cells on the bed [4]. A monitoring system of 8 passive motion sensors mixture model analysis [5]. Another pilot study used motion and door sensors to extract a 24 hour activity profile; an alert could be generated if newly logged data deviated from the stored profile [6]. Heart

  12. Carbon dioxide sensor

    DOE Patents [OSTI]

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

    2011-11-15T23:59:59.000Z

    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).

  13. Thick film hydrogen sensor

    DOE Patents [OSTI]

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

    1995-01-01T23:59:59.000Z

    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.

  14. Lean blowoff detection sensor

    SciTech Connect (OSTI)

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

    2007-04-03T23:59:59.000Z

    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.

  15. Energy Management in Wireless Sensor Network Operations

    E-Print Network [OSTI]

    Mohapatra, Arupa Kumar

    2013-07-26T23:59:59.000Z

    ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 9 Comparison of long-run average costs of policies in 4-node line network (ct = 1 and T = 1) . . . . . . . . . . . . . . . . . . . . . . . 61 10 Fluid- ow model of an energy harvesting sensor . . . . . . . . . . . . 66 11 Sample path of X(t...) under threshold-based node activation policy . . 69 12 Sample path of X(t) in an exponential on-o environment . . . . . . 76 13 Limiting availability for di erent values of threshold (L) . . . . . . . 78 14 Energy ow model of an energy harvesting...

  16. Sensors and Controls Workshop Summary Report

    SciTech Connect (OSTI)

    Susan Maley; Robert R. Romanosky

    2001-11-30T23:59:59.000Z

    Higher operating efficiencies, emission reductions, improved reliability, and lower operating costs are benefits that the power industry can realize with the utilization of sensors and controls. However, for the power industry to derive the maximum benefit from sensors and controls, improvements in existing technologies and novel approaches to challenging measurements are needed. Recognizing the importance of sensors and controls, the U.S. Department of Energy (DOE) National Energy Technology Laboratory (NETL) sponsored a sensors and controls workshop on April 17 to 18, 2001, in Washington, DC. The workshop focused on identifying technology needs in sensors and controls for existing fossil-energy power plants as well as future facilities conceived under the Vision 21 Program. Forty-six experts from 29 organizations, including private industry, research laboratories, academia, and government agencies, attended the workshop. The meeting opened with keynote speakers from NETL and the private sector. NETL officials spoke of the Vision 21 and advanced research programs. Speakers from the Electric Power Research Institute (EPRI) and Delphi Automotive Systems Research Laboratory discussed the improvements realized with their respective operation through the use of sensors and controls. NETL keynote speakers Robert Romanosky and Carl Bauer emphasized that developing sensor and control systems plays a critical role in DOE Office of Fossil Energy Vision 21 Program, clean coal activities under the Power Plant Improvement Initiative, and the proposed Clean Coal Power Initiative. The Vision 21 Program is aimed at providing technologies for ultra-clean fossil-fuel-based energy production with 60- to 75-percent efficiencies and near zero emissions. The program also uses a modular approach to present opportunities to not only generate power, but also co-produce clean fuels, chemicals, steam, and other useful products. The ultra-high efficiency and environmental performance goals of the Vision 21 Program mean that facilities must operate at optimum conditions, while adapting in real-time to changes in load and feedstock. These are challenging performance goals. They will require advanced control and sensing systems that can be adapted and optimized in real time. To improve the overall plant performance of existing power plants, one of the most cost-effective methods is to update the sensor and control systems.

  17. Intelligent Sensor Validation and Fusion with distributed "MEMS Dust" Sensors Shijun Qiu*

    E-Print Network [OSTI]

    Agogino, Alice M.

    Intelligent Sensor Validation and Fusion with distributed "MEMS Dust" Sensors (Abstract) Shijun Qiu, Berkeley aagogino@euler.berkeley.edu Key Words : sensor networks, sensor fusion, sensor validation, micro-electromechanical systems, MEMS MEMS sensors make a rich design space of networked sensors viable. They can be deeply

  18. Emissive sensors and devices incorporating these sensors

    DOE Patents [OSTI]

    Swager, Timothy M; Zhang, Shi-Wei

    2013-02-05T23:59:59.000Z

    The present invention generally relates to luminescent and/or optically absorbing compositions and/or precursors to those compositions, including solid films incorporating these compositions/precursors, exhibiting increased luminescent lifetimes, quantum yields, enhanced stabilities and/or amplified emissions. The present invention also relates to sensors and methods for sensing analytes through luminescent and/or optically absorbing properties of these compositions and/or precursors. Examples of analytes detectable by the invention include electrophiles, alkylating agents, thionyl halides, and phosphate ester groups including phosphoryl halides, cyanides and thioates such as those found in certain chemical warfare agents. The present invention additionally relates to devices and methods for amplifying emissions, such as those produced using the above-described compositions and/or precursors, by incorporating the composition and/or precursor within a polymer having an energy migration pathway. In some cases, the compositions and/or precursors thereof include a compound capable of undergoing a cyclization reaction.

  19. An aerial radiological survey of Pocatello and Soda Springs, Idaho and surrounding area, June--July 1986

    SciTech Connect (OSTI)

    Berry, H.A.

    1987-02-01T23:59:59.000Z

    Three aerial radiological surveys were conducted during the period 16 June through 15 July 1986 over the towns of Pocatello, Soda Springs, and Fort Hall, Idaho and the surrounding areas. The surveys were performed for the United States Environmental Protection Agency (EPA) by the United States Department of Energy's (DOE) Remote Sensing Laboratory (RSL), utilizing the Aerial Measuring System (AMS). This work was completed in cooperation with a study by the EPA to conduct a dose assessment of human radiation exposure for industrial sources in Pocatello and Soda Springs, Idaho. The aerial surveys were performed to document the natural terrestrial radiological environment of the three localities and to map the spatial extent and degree of contamination due to phosphate milling operations. The results of these surveys will be used for planning ground-based measurements in addition to being incorporated into the dose assessment document. 4 refs., 14 figs., 6 tabs.

  20. IN-LINE CHEMICAL SENSOR DEPLOYMENT IN A TRITIUM PLANT

    SciTech Connect (OSTI)

    Tovo, L.; Wright, J.; Torres, R.; Peters, B.

    2013-10-02T23:59:59.000Z

    The Savannah River Tritium Plant (TP) relies on well understood but aging sensor technology for process gas analysis. Though new sensor technologies have been brought to various readiness levels, the TP has been reluctant to install technologies that have not been tested in tritium service. This gap between sensor technology development and incorporating new technologies into practical applications demonstrates fundamental challenges that exist when transitioning from status quo to state-of-the-art in an extreme environment such as a tritium plant. These challenges stem from three root obstacles: 1) The need for a comprehensive assessment of process sensing needs and requirements; 2) The lack of a pick-list of process-compatible sensor technologies; and 3) The need to test technologies in a tritium-contaminated process environment without risking production. At Savannah River, these issues are being addressed in a two phase project. In the first phase, TP sensing requirements were determined by a team of process experts. Meanwhile, Savannah River National Laboratory sensor experts identified candidate technologies and related them to the TP processing requirements. The resulting roadmap links the candidate technologies to actual plant needs. To provide accurate assessments of how a candidate sensor technology would perform in a contaminated process environment, an instrument demonstration station was established within a TP glove box. This station was fabricated to TP process requirements and designed to handle high activity samples. The combination of roadmap and demonstration station provides the following assets: ? Creates a partnership between the process engineers and researchers for sensor selection, maturation, and insertion, ? Selects the right sensors for process conditions ? Provides a means for safely inserting new sensor technology into the process without risking production, and ? Provides a means to evaluate off normal occurrences where and when they occur. This paper discusses the process to identify and demonstrate new sensor technologies for the Savannah River TP.

  1. Hierarchical Nanoceramics for Industrial Process Sensors

    SciTech Connect (OSTI)

    Ruud, James, A.; Brosnan, Kristen, H.; Striker, Todd; Ramaswamy, Vidya; Aceto, Steven, C.; Gao, Yan; Willson, Patrick, D.; Manoharan, Mohan; Armstrong, Eric, N., Wachsman, Eric, D.; Kao, Chi-Chang

    2011-07-15T23:59:59.000Z

    This project developed a robust, tunable, hierarchical nanoceramics materials platform for industrial process sensors in harsh-environments. Control of material structure at multiple length scales from nano to macro increased the sensing response of the materials to combustion gases. These materials operated at relatively high temperatures, enabling detection close to the source of combustion. It is anticipated that these materials can form the basis for a new class of sensors enabling widespread use of efficient combustion processes with closed loop feedback control in the energy-intensive industries. The first phase of the project focused on materials selection and process development, leading to hierarchical nanoceramics that were evaluated for sensing performance. The second phase focused on optimizing the materials processes and microstructures, followed by validation of performance of a prototype sensor in a laboratory combustion environment. The objectives of this project were achieved by: (1) synthesizing and optimizing hierarchical nanostructures; (2) synthesizing and optimizing sensing nanomaterials; (3) integrating sensing functionality into hierarchical nanostructures; (4) demonstrating material performance in a sensing element; and (5) validating material performance in a simulated service environment. The project developed hierarchical nanoceramic electrodes for mixed potential zirconia gas sensors with increased surface area and demonstrated tailored electrocatalytic activity operable at high temperatures enabling detection of products of combustion such as NOx close to the source of combustion. Methods were developed for synthesis of hierarchical nanostructures with high, stable surface area, integrated catalytic functionality within the structures for gas sensing, and demonstrated materials performance in harsh lab and combustion gas environments.

  2. Hydrocarbon sensors and materials therefor

    DOE Patents [OSTI]

    Pham, Ai Quoc (San Jose, CA); Glass, Robert S. (Livermore, CA)

    2000-01-01T23:59:59.000Z

    An electrochemical hydrocarbon sensor and materials for use in sensors. A suitable proton conducting electrolyte and catalytic materials have been found for specific application in the detection and measurement of non-methane hydrocarbons. The sensor comprises a proton conducting electrolyte sandwiched between two electrodes. At least one of the electrodes is covered with a hydrocarbon decomposition catalyst. Two different modes of operation for the hydrocarbon sensors can be used: equilibrium versus non-equilibrium measurements and differential catalytic. The sensor has particular application for on-board monitoring of automobile exhaust gases to evaluate the performance of catalytic converters. In addition, the sensor can be utilized in monitoring any process where hydrocarbons are exhausted, for instance, industrial power plants. The sensor is low cost, rugged, sensitive, simple to fabricate, miniature, and does not suffer cross sensitivities.

  3. Two terminal micropower radar sensor

    DOE Patents [OSTI]

    McEwan, T.E.

    1995-11-07T23:59:59.000Z

    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.

  4. Two terminal micropower radar sensor

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1995-01-01T23:59:59.000Z

    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.

  5. Nuclear sensor signal processing circuit

    DOE Patents [OSTI]

    Kallenbach, Gene A. (Bosque Farms, NM); Noda, Frank T. (Albuquerque, NM); Mitchell, Dean J. (Tijeras, NM); Etzkin, Joshua L. (Albuquerque, NM)

    2007-02-20T23:59:59.000Z

    An apparatus and method are disclosed for a compact and temperature-insensitive nuclear sensor that can be calibrated with a non-hazardous radioactive sample. The nuclear sensor includes a gamma ray sensor that generates tail pulses from radioactive samples. An analog conditioning circuit conditions the tail-pulse signals from the gamma ray sensor, and a tail-pulse simulator circuit generates a plurality of simulated tail-pulse signals. A computer system processes the tail pulses from the gamma ray sensor and the simulated tail pulses from the tail-pulse simulator circuit. The nuclear sensor is calibrated under the control of the computer. The offset is adjusted using the simulated tail pulses. Since the offset is set to zero or near zero, the sensor gain can be adjusted with a non-hazardous radioactive source such as, for example, naturally occurring radiation and potassium chloride.

  6. Preprint version 2012 IEEE/RSJ Int. Conf. on Intelligent Robots and Systems, Vilamoura, Portugal Aerial Grasping of a Moving Target with a Quadrotor UAV

    E-Print Network [OSTI]

    Aerial Grasping of a Moving Target with a Quadrotor UAV Riccardo Spica, Antonio Franchi, Giuseppe Oriolo of planning a trajectory that connects two arbitrary states while allowing the UAV to grasp a moving target-scale Unmanned Aerial Vehicles (UAVs) are popu- lar robotic platforms because of their low cost, versatility

  7. Silicon Sensors for Trackers at High-Luminosity Environment

    E-Print Network [OSTI]

    Timo Peltola

    2014-11-26T23:59:59.000Z

    The planned upgrade of the LHC accelerator at CERN, namely the high luminosity (HL) phase of the LHC (HL-LHC foreseen for 2023), will result in a more intense radiation environment than the present tracking system was designed for. The required upgrade of the all-silicon central trackers at the ALICE, ATLAS, CMS and LHCb experiments will include higher granularity and radiation hard sensors. The radiation hardness of the new sensors must be roughly an order of magnitude higher than the one of LHC detectors. To address this, a massive R&D program is underway within the CERN RD50 collaboration "Development of Radiation Hard Semiconductor Devices for Very High Luminosity Colliders" to develop silicon sensors with sufficient radiation tolerance. Research topics include the improvement of the intrinsic radiation tolerance of the sensor material and novel detector designs with benefits like reduced trapping probability (thinned and 3D sensors), maximized sensitive area (active edge sensors) and enhanced charge carrier generation (sensors with intrinsic gain). A review of the recent results from both measurements and TCAD simulations of several detector technologies and silicon materials at radiation levels expected for HL-LHC will be presented.

  8. INSENS sensor system

    SciTech Connect (OSTI)

    Myers, D.W.; Baker, J.; Benzel, D.M.; Fuess, D.A.

    1993-09-29T23:59:59.000Z

    This paper describes an unattended ground sensor system that has been developed for the immigration and Naturalization Service (INS). The system, known as INSENS, was developed at the Lawrence Livermore National Laboratory for use by the United States Border Patrol. This system assists in the detection of illegal entry of aliens and contraband (illegal drugs, etc.) into the United States along its land borders. Key to the system is its flexible modular design which allows future software and hardware enhancements to the system without altering the fundamental architecture of the system. Elements of the system include a sensor system capable of processing signals from multiple directional probes, a repeater system, and a handheld monitor system. Seismic, passive infrared (PIR), and magnetic probes are currently supported. The design of the INSENS system elements and their performance are described.

  9. Thin film hydrogen sensor

    DOE Patents [OSTI]

    Lauf, R.J.; Hoffheins, B.S.; Fleming, P.H.

    1994-11-22T23:59:59.000Z

    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. 6 figs.

  10. Long-Term, Autonomous Measurement of Atmospheric Carbon Dioxide Using an Ormosil Nanocomposite-Based Optical Sensor

    SciTech Connect (OSTI)

    Kisholoy Goswami

    2005-10-11T23:59:59.000Z

    The goal of this project is to construct a prototype carbon dioxide sensor that can be commercialized to offer a low-cost, autonomous instrument for long-term, unattended measurements. Currently, a cost-effective CO2 sensor system is not available that can perform cross-platform measurements (ground-based or airborne platforms such as balloon and unmanned aerial vehicle (UAV)) for understanding the carbon sequestration phenomenon. The CO2 sensor would support the research objectives of DOE-sponsored programs such as AmeriFlux and the North American Carbon Program (NACP). Global energy consumption is projected to rise 60% over the next 20 years and use of oil is projected to increase by approximately 40%. The combustion of coal, oil, and natural gas has increased carbon emissions globally from 1.6 billion tons in 1950 to 6.3 billion tons in 2000. This figure is expected to reach 10 billon tons by 2020. It is important to understand the fate of this excess CO2 in the global carbon cycle. The overall goal of the project is to develop an accurate and reliable optical sensor for monitoring carbon dioxide autonomously at least for one year at a point remote from the actual CO2 release site. In Phase I of this project, InnoSense LLC (ISL) demonstrated the feasibility of an ormosil-monolith based Autonomous Sensor for Atmospheric CO2 (ASAC) device. All of the Phase I objectives were successfully met.

  11. NOx Sensor Development

    SciTech Connect (OSTI)

    Woo, L Y; Glass, R S

    2009-10-27T23:59:59.000Z

    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.

  12. Small, Inexpensive Combined NOx Sensor and O2 Sensor

    SciTech Connect (OSTI)

    W. N. Lawless; C. F. Clark, Jr.

    2008-09-08T23:59:59.000Z

    It has been successfully demonstrated in this program that a zirconia multilayer structure with rhodium-based porous electrodes performs well as an amperometric NOx sensor. The sensitivity of the sensor bodies operating at 650 to 700 C is large, with demonstrated current outputs of 14 mA at 500 ppm NOx from sensors with 30 layers. The sensor bodies are small (4.5 x 4.2 x 3.1 mm), rugged, and inexpensive. It is projected the sensor bodies will cost $5 - $10 in production. This program has built on another successful development program for an oxygen sensor based on the same principles and sponsored by DOE. This oxygen sensor is not sensitive to NOx. A significant technical hurdle has been identified and solved. It was found that the 100% Rh electrodes oxidize rapidly at the preferred operating temperatures of 650 - 700 C, and this oxidation is accompanied by a volume change which delaminates the sensors. The problem was solved by using alloys of Rh and Pt. It was found that a 10%/90% Rh/Pt alloy dropped the oxidation rate of the electrodes by orders of magnitude without degrading the NOx sensitivity of the sensors, allowing long-term stable operation at the preferred operating temperatures. Degradation in the sensor output caused by temperature cycling was identified as a change in resistance at the junction between the sensor body and the external leads attached to the sensor body. The degradation was eliminated by providing strong mechanical anchors for the wire and processing the junctions to obtain good electrical bonds. The NOx sensors also detect oxygen and therefore the fully-packaged sensor needs to be enclosed with an oxygen sensor in a small, heated zirconia chamber exposed to test gas through a diffusion plug which limits the flow of gas from the outside. Oxygen is pumped from the interior of the chamber to lower the oxygen content and the combination of measurements from the NOx and oxygen sensors yields the NOx content of the gas. Two types of electronic control units were designed and built. One control unit provides independent constant voltages to the NOx and oxygen sensors and reads the current from them (that is, detects the amount of test gas present). The second controller holds the fully-assembled sensor at the desired operating temperature and controllably pumps excess oxygen from the test chamber. While the development of the sensor body was a complete success, the development of the packaging was only partially successful. All of the basic principles were demonstrated, but the packaging was too complex to optimize the operation within the resources of the program. Thus, no fully-assembled sensors were sent to outside labs for testing of cross-sensitivities, response times, etc. Near the end of the program, Sensata Technologies of Attleboro, MA tested the sensor bodies and confirmed the CeramPhysics measurements as indicated in the following attached letter. Sensata was in the process of designing their own packaging for the sensor and performing cross-sensitivity tests when they stopped all sensor development work due to the automotive industry downturn. Recently Ceramatec Inc. of Salt Lake City has expressed an interest in testing the sensor, and other licensing opportunities are being pursued.

  13. Ultra-wideband impedance sensor

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1999-01-01T23:59:59.000Z

    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.

  14. Ultra-wideband impedance sensor

    DOE Patents [OSTI]

    McEwan, T.E.

    1999-03-16T23:59:59.000Z

    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.

  15. Unsupervised Activity Analysis and Monitoring Algorithms for Effective Surveillance Systems

    E-Print Network [OSTI]

    in escalators and at platforms as well as human presence at lift ) that provide a global view of the activ- ity of sensors deployed in the real world, being it in large scale sensor networks or closed-circuit television

  16. Sensor Development and Readout Prototyping for the STAR Pixel Detector

    SciTech Connect (OSTI)

    Greiner, L.; Anderssen, E.; Matis, H.S.; Ritter, H.G.; Stezelberger, T.; Szelezniak, M.; Sun, X.; Vu, C.; Wieman, H.

    2009-01-14T23:59:59.000Z

    The STAR experiment at the Relativistic Heavy Ion Collider (RHIC) is designing a new vertex detector. The purpose of this upgrade detector is to provide high resolution pointing to allow for the direct topological reconstruction of heavy flavor decays such as the D{sup 0} by finding vertices displaced from the collision vertex by greater than 60 microns. We are using Monolithic Active Pixel Sensor (MAPS) as the sensor technology and have a coupled sensor development and readout system plan that leads to a final detector with a <200 {micro}s integration time, 400 M pixels and a coverage of -1 < {eta} < 1. We present our coupled sensor and readout development plan and the status of the prototyping work that has been accomplished.

  17. Sensor Network Demonstration for In Situ Decommissioning - 13332

    SciTech Connect (OSTI)

    Lagos, L.; Varona, J.; Awwad, A. [Applied Research Center, Florida International University, 10555 West Flagler Street, Suite 2100, Miami, FL 33174 (United States)] [Applied Research Center, Florida International University, 10555 West Flagler Street, Suite 2100, Miami, FL 33174 (United States); Rivera, J.; McGill, J. [Department of Energy - DOE, Environmental Management Office (United States)] [Department of Energy - DOE, Environmental Management Office (United States)

    2013-07-01T23:59:59.000Z

    Florida International University's (FIU's) Applied Research Center is currently supporting the Department of Energy's (DOE) Environmental Management Office of D and D and Facility Engineering program. FIU is supporting DOE's initiative to improve safety, reduce technical risks, and limit uncertainty within D and D operations by identifying technologies suitable to meet specific facility D and D requirements, assessing the readiness of those technologies for field deployment, and conducting feasibility studies and large scale demonstrations of promising technologies. During FY11, FIU collaborated with Savannah River National Laboratory in the development of an experimental test site for the demonstration of multiple sensor systems for potential use in the in situ decommissioning process. In situ decommissioning is a process in which the above ground portion of a facility is dismantled and removed, and the underground portion is filled with a cementious material such as grout. In such a scenario, the question remains on how to effectively monitor the structural health of the grout (cracking, flexing, and sinking), as well as track possible migration of contaminants within and out of the grouted monolith. The right types of sensors can aid personnel in better understanding the conditions within the entombed structure. Without sensors embedded in and around the monolith, it will be very difficult to estimate structural integrity and contaminant transport. Yet, to fully utilize the appropriate sensors and the provided data, their performance and reliability must be evaluated outside a laboratory setting. To this end, a large scale experimental setup and demonstration was conducted at FIU. In order to evaluate a large suite of sensor systems, FIU personnel designed and purchased a pre-cast concrete open-top cube, which served as a mock-up of an in situ DOE decommissioned facility. The inside of the cube measures 10 ft x 10 ft x 8 ft. In order to ensure that the individual sensors would be immobilized during the grout pouring activities, a set of nine sensor racks were designed. The 270 sensors provided by Idaho National Laboratory (INL), Mississippi State University (MSU), University of Houston (UH), and University of South Carolina (USC) were secured to these racks based on predetermined locations. Once sensor racks were installed inside the test cube, connected and debugged, approximately 32 cubic yards of special grout material was used to entomb the sensors. MSU provided and demonstrated four types of fiber loop ring-down (FLR) sensors for detection of water, temperature, cracks, and movement of fluids. INL provided and demonstrated time differenced 3D electrical resistivity tomography (ERT), advanced tensiometers for moisture content, and thermocouples for temperature measurements. University of Houston provided smart aggregate (SA) sensors, which detect crack severity and water presence. An additional UH sensor system demonstrated was a Fiber Bragg Grating (FBG) fiber optic system measuring strain, presence of water, and temperature. USC provided a system which measured acoustic emissions during cracking, as well as temperature and pH sensors. All systems were connected to a Sensor Remote Access System (SRAS) data networking and collection system designed, developed and provided by FIU. The purpose of SRAS was to collect and allow download of the raw sensor data from all the sensor system, as well as allow upload of the processed data and any analysis reports and graphs. All this information was made available to the research teams via the Deactivation and Decommissioning Knowledge Management and Information Tool (D and D KM-IT). As a current research effort, FIU is performing an energy analysis, and transferring several sensor systems to a Photovoltaic (PV) System to continuously monitor energy consumption parameters and overall power demands. Also, One final component of this research is focusing on developing an integrated data network to capture, log and analyze sensor system data in near real time from a single inte

  18. HOMOLOGICAL SENSOR Vin de Silva 1

    E-Print Network [OSTI]

    Ghrist, Robert W.

    HOMOLOGICAL SENSOR NETWORKS Vin de Silva 1 and Robert Ghrist 2 Sensors and sense-ability A sensor) as well as vast networks of local sensors (for touch). 1Department of Mathematics, Pomona College. 2 possibilities lie in the domain of the small. Swarms of local sensors at micro- or nano- scale have

  19. Weed Mapping in Early-Season Maize Fields Using Object-Based Analysis of Unmanned Aerial Vehicle (UAV)

    E-Print Network [OSTI]

    Kelly, Maggi

    (UAV) Images José Manuel Peña1* , Jorge Torres-Sánchez1 , Ana Isabel de Castro1 , Maggi Kelly2 of remote imagery captured by unmanned aerial vehicles (UAV) has tremendous potential for designing detailed) procedure was developed on a series of UAV images using a six-band multispectral camera (visible and near

  20. Getting Ready for the Challenges for the Air Traffic Management for Unmanned Aerial Systems (UAS) C.W. Johnson,

    E-Print Network [OSTI]

    Johnson, Chris

    for a lost link profile. If communications are lost, the vehicle will autonomously cross the airspace between as EUROCONTROL's Spec-0102 on the Use of Military Unmanned Aerial Vehicles as Operational Air Traffic Outside interaction between ATCOs and UAS platforms. These are the flight patterns that are executed autonomously when

  1. Final report on the PNL program to develop an alumina sensor. Sensors Development Program

    SciTech Connect (OSTI)

    Windisch, C.F. Jr.; Brenden, B.B.; Koski, O.H.; Williford, R.E.

    1992-10-01T23:59:59.000Z

    An alumina concentration sensor was required to ensure safe operating conditions for cermet inert anodes that were under development at the Pacific Northwest Laboratory (PNL)(a) for the electrolytic production of aluminum metal. The Sensors Development Program at PNL was conducted in response to this need for an alumina sensor. In all, eight different approaches to developing an alumina sensor were evaluated as part of this program. Each approach sought to correlate alumina concentration either to some spectral, physical, or electrical property of the molten electrolytic, or alternatively, to some operational characteristic of the reduction cell such as the integrity of the cermet anodes or the electrical noise generated by them during cell operation. The studies on electrical noise were performed using a large number of digital signal analysis (DSA) methods. There were two primary requirements for success for an alumina sensor to be used in conjunction with cermet anodes: (1) adequate sensitivity to alumina concentration at concentrations close to saturation, and (2) ease of use in an industrial setting. After numerous laboratory experiments as well as field studies in some cases, it was concluded that none of the approaches sufficiently satisfied the two criteria to serve as the basis for an alumina sensor. If further work is to continue in this area, it is recommended that the research focus on altemative DSA approaches, primarily because DSA methods would be so easy to use in an industrial environment. Due to the lack of correlation using DSA in the present work, however, it is recommended that altemative strategies for data collection and analysis be used in any further development activities.

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

    E-Print Network [OSTI]

    Chen, Min

    aquatic environments. Marine surveillance, pollution detection and monitoring, and oceanographic data (salinity, conductivity, turbidity, pH, oxygen, temperature, depth, etc.) - Sediments and pollution sensor nodes - Acoustic sensors - Underwater sensor network architectures - Wired and wireless protocols

  3. Implementation of an Onboard Visual Tracking System with Small Unmanned Aerial Vehicle (UAV)

    E-Print Network [OSTI]

    Qadir, Ashraf; Neubert, Jeremiah

    2012-01-01T23:59:59.000Z

    This paper presents a visual tracking system that is capable or running real time on-board a small UAV (Unmanned Aerial Vehicle). The tracking system is computationally efficient and invariant to lighting changes and rotation of the object or the camera. Detection and tracking is autonomously carried out on the payload computer and there are two different methods for creation of the image patches. The first method starts detecting and tracking using a stored image patch created prior to flight with previous flight data. The second method allows the operator on the ground to select the interest object for the UAV to track. The tracking system is capable of re-detecting the object of interest in the events of tracking failure. Performance of the tracking system was verified both in the lab and during actual flights of the UAV. Results show that the system can run on-board and track a diverse set of objects in real time.

  4. Statistical techniques applied to aerial radiometric surveys (STAARS): principal components analysis user's manual. [NURE program

    SciTech Connect (OSTI)

    Koch, C.D.; Pirkle, F.L.; Schmidt, J.S.

    1981-01-01T23:59:59.000Z

    A Principal Components Analysis (PCA) has been written to aid in the interpretation of multivariate aerial radiometric data collected by the US Department of Energy (DOE) under the National Uranium Resource Evaluation (NURE) program. The variations exhibited by these data have been reduced and classified into a number of linear combinations by using the PCA program. The PCA program then generates histograms and outlier maps of the individual variates. Black and white plots can be made on a Calcomp plotter by the application of follow-up programs. All programs referred to in this guide were written for a DEC-10. From this analysis a geologist may begin to interpret the data structure. Insight into geological processes underlying the data may be obtained.

  5. Nonlinear Decelerator for Payloads in Aerial Delivery Systems. I: Design and Testing

    E-Print Network [OSTI]

    T. Lyons; M. Ginther; P. Mascarenas; E. Rickard; J. Robinson; J. Braeger; H. Liu; A. Ludu

    2014-08-19T23:59:59.000Z

    We study the dynamics and the optimization of the shock deceleration supported by a payload when its airborne carrier impacts the ground. We build a nonlinear elastic model for a container prototype and an elastic suspension system for the payload. We model the dynamics of this system and extract information on maximum deceleration, energy transfer between the container and payload, and energy resonant damping. We designed the system and perform lab experiments for various terminal velocities and types of grounds (cement, grass, sand water, etc.). The results are compared with the theoretical model and results are commented, including predictions for deceleration at different types of ground impact. The results can be used for aerial delivery systems, splash-down of capsules, recoveries, weather balloons, coastal surveying systems, or the new introduced goal-line technology in sport competitions.

  6. Microfabricated AC impedance sensor

    DOE Patents [OSTI]

    Krulevitch, Peter (Pleasanton, CA); Ackler, Harold D. (Sunnyvale, CA); Becker, Frederick (Houston, TX); Boser, Bernhard E. (Berkeley, CA); Eldredge, Adam B. (Austin, TX); Fuller, Christopher K. (Livermore, CA); Gascoyne, Peter R. C. (Bellaire, TX); Hamilton, Julie K. (Tracy, CA); Swierkowski, Stefan P. (Livermore, CA); Wang, Xiao-Bo (San Diego, CA)

    2002-01-01T23:59:59.000Z

    A microfabricated instrument for detecting and identifying cells and other particles based on alternating current (AC) impedance measurements. The microfabricated AC impedance sensor includes two critical elements: 1) a microfluidic chip, preferably of glass substrates, having at least one microchannel therein and with electrodes patterned on both substrates, and 2) electrical circuits that connect to the electrodes on the microfluidic chip and detect signals associated with particles traveling down the microchannels. These circuits enable multiple AC impedance measurements of individual particles at high throughput rates with sufficient resolution to identify different particle and cell types as appropriate for environmental detection and clinical diagnostic applications.

  7. Fluorescent sensor for mercury

    DOE Patents [OSTI]

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

    2011-11-22T23:59:59.000Z

    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.

  8. Solid state oxygen sensor

    DOE Patents [OSTI]

    Garzon, Fernando H. (Sante Fe, NM); Chung, Brandon W. (Los Alamos, NM); Raistrick, Ian D. (Los Alamos, NM); Brosha, Eric L. (Los Alamos, NM)

    1996-01-01T23:59:59.000Z

    Solid state oxygen sensors are provided with a yttria-doped zirconia as an electrolyte and use the electrochemical oxygen pumping of the zirconia electrolyte. A linear relationship between oxygen concentration and the voltage arising at a current plateau occurs when oxygen accessing the electrolyte is limited by a diffusion barrier. A diffusion barrier is formed herein with a mixed electronic and oxygen ion-conducting membrane of lanthanum-containing perovskite or zirconia-containing fluorite. A heater may be used to maintain an adequate oxygen diffusion coefficient in the mixed conducting layer.

  9. Thin film hydrogen sensor

    DOE Patents [OSTI]

    Cheng, Y.T.; Poli, A.A.; Meltser, M.A.

    1999-03-23T23:59:59.000Z

    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. 5 figs.

  10. Thin film hydrogen sensor

    DOE Patents [OSTI]

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

    1999-01-01T23:59:59.000Z

    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.

  11. Use of sensors in monitoring civil structures

    E-Print Network [OSTI]

    Daher, Bassam William, 1979-

    2004-01-01T23:59:59.000Z

    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 ...

  12. On the robustness of clustered sensor networks

    E-Print Network [OSTI]

    Cho, Jung Jin

    2009-05-15T23:59:59.000Z

    or fault tolerance capability of a sensor system. The redundancy degree of sensors plays two important roles pertaining to the robustness of a sensor network. First, the redundancy degree provides proper parameter values for robust estimator; second, we can...

  13. Massively Deployed Sensors Final Project Report

    E-Print Network [OSTI]

    Massively Deployed Sensors Final Project Report Power Systems Engineering Research Center Systems Engineering Research Center Massively Deployed Sensors Final Project Report Editors Jonathan project titled "Massively Deployed Sensors," PSERC project T-31. We express our appreciation

  14. CHEMICAL SENSORS School of Chemistry and Biochemistry

    E-Print Network [OSTI]

    Sherrill, David

    CHEMICAL SENSORS CHEM 6282 School of Chemistry and Biochemistry Chemical sensors physics and electronics or a chemical instrumentation course. The topics covered will include general theory of chemical recognition, electrochemical, optical, mass sensors and data reduction. Text: J

  15. UAV Design Activities in a University Environment Dr K.C. Wong

    E-Print Network [OSTI]

    Wong, K. C.

    UAV Design Activities in a University Environment Dr K.C. Wong School of Aerospace, Mechanical and Mechatronic Engineering University of Sydney NSW 2006 Abstract Unmanned Aerial Vehicle (UAV) activities have remotely piloted aircraft being developed and operated over its 62 year history. More recently, a UAV

  16. Sensors 2010, 10, 5872-5887; doi:10.3390/s100605872 ISSN 1424-8220

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    a pre-defined reference speed, to economize on fuel or energy consumption, to avoid speeding fines; sensorial fusion; RFID; autonomous vehicle OPEN ACCESS #12;Sensors 2010, 10 5873 1. Introduction Road.mdpi.com/journal/sensors Article An RFID-Based Intelligent Vehicle Speed Controller Using Active Traffic Signals Joshué Pérez

  17. Telehealth using ECG Sensor and Accelerometer Hristijan Gjoreski*, Aleksandra Rashkovska**, Simon Kozina*, Mitja Lustrek*, Matjaz Gams*,

    E-Print Network [OSTI]

    Lu?trek, Mitja

    Telehealth using ECG Sensor and Accelerometer Hristijan Gjoreski*, Aleksandra Rashkovska**, Simon are important components of such systems. Moreover, the monitoring of vital signs, like the ECG, has a key role by combining an ECG sensor and two accelerometers. Our system recognizes the user's activities and detects

  18. Passive blast pressure sensor

    DOE Patents [OSTI]

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

    2013-03-19T23:59:59.000Z

    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.

  19. Fiber optic temperature sensor

    SciTech Connect (OSTI)

    Rabold, D.

    1995-12-01T23:59:59.000Z

    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.

  20. Intelligent Software Agents: Sensor Integration and Response

    SciTech Connect (OSTI)

    Kulesz, James J [ORNL; Lee, Ronald W [ORNL

    2013-01-01T23:59:59.000Z

    Abstract In a post Macondo world the buzzwords are Integrity Management and Incident Response Management. The twin processes are not new but the opportunity to link the two is novel. Intelligent software agents can be used with sensor networks in distributed and centralized computing systems to enhance real-time monitoring of system integrity as well as manage the follow-on incident response to changing, and potentially hazardous, environmental conditions. The software components are embedded at the sensor network nodes in surveillance systems used for monitoring unusual events. When an event occurs, the software agents establish a new concept of operation at the sensing node, post the event status to a blackboard for software agents at other nodes to see , and then react quickly and efficiently to monitor the scale of the event. The technology addresses a current challenge in sensor networks that prevents a rapid and efficient response when a sensor measurement indicates that an event has occurred. By using intelligent software agents - which can be stationary or mobile, interact socially, and adapt to changing situations - the technology offers features that are particularly important when systems need to adapt to active circumstances. For example, when a release is detected, the local software agent collaborates with other agents at the node to exercise the appropriate operation, such as: targeted detection, increased detection frequency, decreased detection frequency for other non-alarming sensors, and determination of environmental conditions so that adjacent nodes can be informed that an event is occurring and when it will arrive. The software agents at the nodes can also post the data in a targeted manner, so that agents at other nodes and the command center can exercise appropriate operations to recalibrate the overall sensor network and associated intelligence systems. The paper describes the concepts and provides examples of real-world implementations including the Threat Detection and Analysis System (TDAS) at the International Port of Memphis and the Biological Warning and Incident Characterization System (BWIC) Environmental Monitoring (EM) Component. Technologies developed for these 24/7 operational systems have applications for improved real-time system integrity awareness as well as provide incident response (as needed) for production and field applications.

  1. Wireless Magnetic Sensor Applications in Transportation Infrastructure

    E-Print Network [OSTI]

    Sanchez, Rene Omar

    2012-01-01T23:59:59.000Z

    and fourth vehicle downstream signature (five vehicleof Figures Upstream and downstream middle sensor raw signals2.2 Upstream and downstream middle sensor signature

  2. Flexible Pressure Sensors: Modeling and Experimental Characterization

    E-Print Network [OSTI]

    Viana, J.C.

    Flexible capacitive pressure sensors fabricated with nanocomposites were experimentally characterized and results compared with simulations from analytical modeling. Unlike traditional diaphragm silicon pressure sensors, ...

  3. Detectors and Sensors | ornl.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Detectors and Sensors SHARE Detectors and Sensors 201303163 Extreme Filter for Low-Output Thermocouples in High EMI Environments 201303179 Internal Tube Inspection System...

  4. A MECHANICAL STRAIN SENSOR FOR POLYMERIC MATERIALS

    E-Print Network [OSTI]

    A MECHANICAL STRAIN SENSOR FOR POLYMERIC MATERIALS AND PHOTOPHYSICAL INVESTIGATIONS OF LARGE ...................................................................................................... 17 A MECHANICAL STRAIN SENSOR FOR POLYMERIC MATERIALS ....... 21 3.1 Introduction

  5. Gas sensor incorporating a porous framework

    DOE Patents [OSTI]

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

    2014-05-27T23:59:59.000Z

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

  6. Gas sensor incorporating a porous framework

    SciTech Connect (OSTI)

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

    2013-07-09T23:59:59.000Z

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

  7. Nanostructured Electrochemical Sensors Based on Functionalized...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sensors Based on Functionalized Nanoporous Silica for Voltammetric Analysis of Lead, Mercury and Nanostructured Electrochemical Sensors Based on Functionalized Nanoporous Silica...

  8. Enabling Long-Lived Sensor Networks Through Solar Energy Harvesting

    E-Print Network [OSTI]

    Jason Hsu; Sadaf Zahedi; Jonathan Friedman; Aman Kansal; Vijay Raghunathan; Mani Srivastava

    2005-01-01T23:59:59.000Z

    Long - Lived Sensor Networks through Solar Energy Harvestingsolar energy harvesting and storage device for sensor

  9. Energy efficient sensor network implementations

    SciTech Connect (OSTI)

    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

    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.

  10. Transformer current sensor for superconducting magnetic coils

    DOE Patents [OSTI]

    Shen, Stewart S. (Oak Ridge, TN); Wilson, C. Thomas (Norris, TN)

    1988-01-01T23:59:59.000Z

    A transformer current sensor having primary turns carrying a primary current for a superconducting coil and secondary turns only partially arranged within the primary turns. The secondary turns include an active winding disposed within the primary turns and a dummy winding which is not disposed in the primary turns and so does not experience a magnetic field due to a flow of current in the primary turns. The active and dummy windings are wound in opposite directions or connected in series-bucking relationship, and are exposed to the same ambient magnetic field. Voltages which might otherwise develop in the active and dummy windings due to ambient magnetic fields thus cancel out. The resultant voltage is purely indicative of the rate of change of current flowing in the primary turns.

  11. Novel, fiber optic, hybrid pressure and temperature sensor designed for high-temperature gen-IV reactor applications

    SciTech Connect (OSTI)

    Palmer, M. E.; Fielder, R. S.; Davis, M. A. [Luna Innovations, Incorporated, 2851 Commerce St., Blacksburg, VA 24060 (United States)

    2006-07-01T23:59:59.000Z

    A novel, fiber optic, hybrid pressure-temperature sensor is presented. The sensor is designed for reliable operation up to 1050 C, and is based on the high-temperature fiber optic sensors already demonstrated during previous work. The novelty of the sensors presented here lies in the fact that pressure and temperature are measured simultaneously with a single fiber and a single transducer. This hybrid approach will enable highly accurate active temperature compensation and sensor self-diagnostics not possible with other platforms. Hybrid pressure and temperature sensors were calibrated by varying both pressure and temperature. Implementing active temperature compensation resulted in a ten-fold reduction in the temperature-dependence of the pressure measurement. Sensors were also tested for operability in a relatively high neutron radiation environment up to 6.9x10{sup 17} n/cm{sup 2}. In addition to harsh environment survivability, fiber optic sensors offer a number of intrinsic advantages for nuclear power applications including small size, immunity to electromagnetic interference, self diagnostics / prognostics, and smart sensor capability. Deploying fiber optic sensors on future nuclear power plant designs would provide a substantial improvement in system health monitoring and safety instrumentation. Additional development is needed, however, before these advantages can be realized. This paper will highlight recent demonstrations of fiber optic sensors in environments relevant to emerging nuclear power plants. Successes and lessons learned will be highlighted. (authors)

  12. Oxygen partial pressure sensor

    DOE Patents [OSTI]

    Dees, D.W.

    1994-09-06T23:59:59.000Z

    A method for detecting oxygen partial pressure and an oxygen partial pressure sensor are provided. The method for measuring oxygen partial pressure includes contacting oxygen to a solid oxide electrolyte and measuring the subsequent change in electrical conductivity of the solid oxide electrolyte. A solid oxide electrolyte is utilized that contacts both a porous electrode and a nonporous electrode. The electrical conductivity of the solid oxide electrolyte is affected when oxygen from an exhaust stream permeates through the porous electrode to establish an equilibrium of oxygen anions in the electrolyte, thereby displacing electrons throughout the electrolyte to form an electron gradient. By adapting the two electrodes to sense a voltage potential between them, the change in electrolyte conductivity due to oxygen presence can be measured. 1 fig.

  13. Ion mobility sensor system

    DOE Patents [OSTI]

    Xu, Jun; Watson, David B.; Whitten, William B.

    2013-01-22T23:59:59.000Z

    An ion mobility sensor system including an ion mobility spectrometer and a differential mobility spectrometer coupled to the ion mobility spectrometer. The ion mobility spectrometer has a first chamber having first end and a second end extending along a first direction, and a first electrode system that generates a constant electric field parallel to the first direction. The differential mobility spectrometer includes a second chamber having a third end and a fourth end configured such that a fluid may flow in a second direction from the third end to the fourth end, and a second electrode system that generates an asymmetric electric field within an interior of the second chamber. Additionally, the ion mobility spectrometer and the differential mobility spectrometer form an interface region. Also, the first end and the third end are positioned facing one another so that the constant electric field enters the third end and overlaps the fluid flowing in the second direction.

  14. Fuel cell CO sensor

    DOE Patents [OSTI]

    Grot, Stephen Andreas (Rochester, NY); Meltser, Mark Alexander (Pittsford, NY); Gutowski, Stanley (Pittsford, NY); Neutzler, Jay Kevin (Rochester, NY); Borup, Rodney Lynn (East Rochester, NY); Weisbrod, Kirk (Los Alamos, NM)

    1999-12-14T23:59:59.000Z

    The CO concentration in the H.sub.2 feed stream to a PEM fuel cell stack is monitored by measuring current and/or voltage behavior patterns from a PEM-probe communicating with the reformate feed stream. Pattern recognition software may be used to compare the current and voltage patterns from the PEM-probe to current and voltage telltale outputs determined from a reference cell similar to the PEM-probe and operated under controlled conditions over a wide range of CO concentrations in the H.sub.2 fuel stream. A CO sensor includes the PEM-probe, an electrical discharge circuit for discharging the PEM-probe to monitor the CO concentration, and an electrical purging circuit to intermittently raise the anode potential of the PEM-probe's anode to at least about 0.8 V (RHE) to electrochemically oxidize any CO adsorbed on the probe's anode catalyst.

  15. Monday, March 29, 2010 A Bendable Heart Sensor

    E-Print Network [OSTI]

    Rogers, John A.

    Monday, March 29, 2010 A Bendable Heart Sensor New flexible electronics can better chart the heart a more detailed picture of the electrical activity of a beating heart. This high-resolution electrical map could help improve the diagnosis and treatment of heart abnormalities by pinpointing areas

  16. RealTime SpatioTemporal Query Processing in Mobile AdHoc Sensor Networks

    E-Print Network [OSTI]

    that has multiple sensors (e.g., mo tion sensors, acoustic sensors, infrared light emitting diodes,

  17. NSTX High Temperature Sensor Systems

    SciTech Connect (OSTI)

    B.McCormack; H.W. Kugel; P. Goranson; R. Kaita; et al

    1999-11-01T23:59:59.000Z

    The design of the more than 300 in-vessel sensor systems for the National Spherical Torus Experiment (NSTX) has encountered several challenging fusion reactor diagnostic issues involving high temperatures and space constraints. This has resulted in unique miniature, high temperature in-vessel sensor systems mounted in small spaces behind plasma facing armor tiles, and they are prototypical of possible high power reactor first-wall applications. In the Center Stack, Divertor, Passive Plate, and vessel wall regions, the small magnetic sensors, large magnetic sensors, flux loops, Rogowski Coils, thermocouples, and Langmuir Probes are qualified for 600 degrees C operation. This rating will accommodate both peak rear-face graphite tile temperatures during operations and the 350 degrees C bake-out conditions. Similar sensor systems including flux loops, on other vacuum vessel regions are qualified for 350 degrees C operation. Cabling from the sensors embedded in the graphite tiles follows narrow routes to exit the vessel. The detailed sensor design and installation methods of these diagnostic systems developed for high-powered ST operation are discussed.

  18. Design of a four rotor unmanned aerial vehicle capable of sustaining zero-roll and zero-pitch flight using vector thrusting

    E-Print Network [OSTI]

    Hilton, Danny Charles

    2005-01-01T23:59:59.000Z

    In recent decades, remote controlled airplanes and helicopters equipped with video cameras have been used by the movie industry, photographers, and for surveillance. The military deploys these unmanned aerial vehicles ...

  19. HandWave : design and manufacture of a wearable wireless skin conductance sensor and housing

    E-Print Network [OSTI]

    Strauss, Marc D

    2005-01-01T23:59:59.000Z

    This thesis report details the design and manufacture of HandWave, a wearable wireless Bluetooth skin conductance sensor, and dedicated housing. The HandWave collects Electrodermal Activity (EDA) data by measuring skin ...

  20. Enhancement of a fluorescent sensor for monitoring glucose concentration in diabetic patients

    E-Print Network [OSTI]

    Ibey, Bennett Luke

    2007-04-25T23:59:59.000Z

    procedure, but unforeseen complications in lyophilization of the new sensor assay restricted its completion. Due to instability of Con A in solution, it was hypothesized that the immobilization of it onto the surface of an active substrate would increase its...

  1. Ultra-Sensitive biochemical Sensor based on Circular Bragg Micro-Cavities

    E-Print Network [OSTI]

    Scheuer, Jacob (Koby)

    an SEM micrograph of an ABR sensor realized within a thin membrane of InGaAsP active material. The device with high spectral resolution and excellent sensitivity to changes in the absorption or refractive index

  2. UAV sensor and survivability issues

    SciTech Connect (OSTI)

    Canavan, G.H.

    1996-07-01T23:59:59.000Z

    This report discusses the most significant tradeoffs between the operating altitude and the complexity and cost of UAVs and sensors. Low altitudes allow less complex, smaller sensors and platforms, but are vulnerable to ground fire. High altitudes require more numerous and capable sensors, but provide wider swaths for more rapid coverage and reduced vulnerability to ground fire. It is shown that for mission requirements and air defenses that higher is not necessarily better and that optimal flight altitudes exist that can be determined analytically.

  3. Sensors for Safety & Performance Stationary Systems

    E-Print Network [OSTI]

    for PEM Fuel Cell Vehicles · Interfacial Stability of Thin Film H2 Sensors · Sensors for Automotive Fuel Cell Systems · Micro-Machined Thin Film H2 Gas Sensors · Sensor Development for PEM Fuel Cell Systems for Fuel Cell Monitoring #12;Discussion Points Barriers ·Cost ·Application ·Lifetime ·Flexibility ·Public

  4. IEEE SENSORS JOURNAL, VOL. 4, NO. 4, AUGUST 2004 395 Sensor Technologies for Monitoring Metabolic

    E-Print Network [OSTI]

    Wilson, Denise

    IEEE SENSORS JOURNAL, VOL. 4, NO. 4, AUGUST 2004 395 Sensor Technologies for Monitoring Metabolic Michelle Wilson, Member, IEEE Abstract--A review of optical, chemical, and biological sensors to detect-on-a-chip research instrumentation. The sensors reviewed include optical sensors, at both research and commercial

  5. Multiple frequency method for operating electrochemical sensors

    DOE Patents [OSTI]

    Martin, Louis P. (San Ramon, CA)

    2012-05-15T23:59:59.000Z

    A multiple frequency method for the operation of a sensor to measure a parameter of interest using calibration information including the steps of exciting the sensor at a first frequency providing a first sensor response, exciting the sensor at a second frequency providing a second sensor response, using the second sensor response at the second frequency and the calibration information to produce a calculated concentration of the interfering parameters, using the first sensor response at the first frequency, the calculated concentration of the interfering parameters, and the calibration information to measure the parameter of interest.

  6. Sensors and Actuators for the Advanced LIGO Mirror Suspensions

    E-Print Network [OSTI]

    L. Carbone; S. M. Aston; R. M. Cutler; A. Freise; J. Greenhalgh; J. Heefner; D. Hoyland; N. A. Lockerbie; D. Lodhia; N. A. Robertson; C. C. Speake; K. A. Strain; A. Vecchio

    2012-05-25T23:59:59.000Z

    We have developed, produced and characterised integrated sensors, actuators and the related read-out and drive electronics that will be used for the control of the Advanced LIGO suspensions. The overall system consists of the BOSEMs (displacement sensor with integrated electro-magnetic actuator), the satellite boxes (BOSEM readout and interface electronics) and six different types of coil-driver units. In this paper we present the design of this read-out and control system, we discuss the related performance relevant for the Advanced LIGO suspensions, and we report on the experimental activity finalised at the production of the instruments for the Advanced LIGO detectors.

  7. Mining Users' Significant Driving Routes with Low-power Sensors

    E-Print Network [OSTI]

    Nawaz, Sarfraz; Mascolo, Cecilia

    2014-01-01T23:59:59.000Z

    sensing [38] from low power sensors, the energy cost of location sensing is high when location sensors are active. It is also possible for the phone to be plugged in a charging port in the vehi- cle during journeys but this places an extra constraint... on the user to remember to plug the phone in during each journey for energy intensive location sensing. Significantly lower- ing the energy consumption of sensing these journeys will relieve the user of this requirement and thus make it more likely...

  8. Tests of Australian aerial radiometric data for use in petroleum reconnaissance

    SciTech Connect (OSTI)

    Saunders, D.F.; Branch, J.F.; Thompson, C.K. (Recon Exploration Pty. Ltd., Dallas, TX (United States))

    1994-03-01T23:59:59.000Z

    Recon Exploration Pty. Ltd. has successfully completed initial testing of a new method for processing and interpretation of AGSO's (Australian Geological Survey Organization, formerly Bureau of Mineral Resources) aerial gamma-ray spectrometer data for petroleum exploration in the Canning Basin, Western Australia and the Otway Basin, Victoria. Count-rate data for potassium and uranium were normalized to the thorium count rate for each sample to suppress unwanted effects of variations in surface lithology or soil type, soil moisture, vegetation cover, and counting geometry. The Canning Basin test area included five producing oil fields. All except one clearly exhibit significant and characteristic radiometric anomalies which include negative normalized potassium and more positive normalized uranium values. The Otway Basin test areas included PPL-1 commercial gas production which is associated with a group of significant radiometric anomalies similar to those in the Canning Basin. These results are similar to extensive ongoing tests in the US and are explained in terms of well-understood geological, geochemical, and geophysical models. Based on 69 wells in the three test areas, it is estimated that the chance of encountering hydrocarbons (economic production or shows) in wells within the radiometrically favorable zones is about 2.6 times greater than outside the favorable areas.

  9. Design of a reconfigurable liquid hydrogen fuel tank for use in the Genii unmanned aerial vehicle

    SciTech Connect (OSTI)

    Adam, Patrick; Leachman, Jacob [HYdrogen Properties for Energy Research (HYPER) Laboratory, Washington State University, Pullman, WA 99164-2920 (United States)

    2014-01-29T23:59:59.000Z

    Long endurance flight, on the order of days, is a leading flight performance characteristic for Unmanned Aerial Vehicles (UAVs). Liquid hydrogen (LH2) is well suited to providing multi-day flight times with a specific energy 2.8 times that of conventional kerosene based fuels. However, no such system of LH2 storage, delivery, and use is currently available for commercial UAVs. In this paper, we develop a light weight LH2 dewar for integration and testing in the proton exchange membrane (PEM) fuel cell powered, student designed and constructed, Genii UAV. The fuel tank design is general for scaling to suit various UAV platforms. A cylindrical vacuum-jacketed design with removable end caps was chosen to incorporate various fuel level gauging, pressurizing, and slosh mitigation systems. Heat and mechanical loadings were modeled to compare with experimental results. Mass performance of the fuel tank is characterized by the fraction of liquid hydrogen to full tank mass, and the insulation performance was characterized by effective thermal conductivity and boil-off rate.

  10. Compact orthogonal NMR field sensor

    DOE Patents [OSTI]

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

    2009-02-03T23:59:59.000Z

    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.

  11. Sensor applications of carbon nanotubes

    E-Print Network [OSTI]

    Rushfeldt, Scott I

    2005-01-01T23:59:59.000Z

    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, ...

  12. Nuclear magnetic resonance readable sensors

    E-Print Network [OSTI]

    Ling, Yibo

    2010-01-01T23:59:59.000Z

    The monitoring of physiological biomarkers is fundamental to the diagnosis and treatment of disease. We describe here the development of molecular sensors which can be read by magnetic resonance (MR) relaxometry. MR is an ...

  13. Battery system with temperature sensors

    DOE Patents [OSTI]

    Wood, Steven J; Trester, Dale B

    2014-02-04T23:59:59.000Z

    A battery system includes a platform having an aperture formed therethrough, a flexible member having a generally planar configuration and extending across the aperture, wherein a portion of the flexible member is coextensive with the aperture, a cell provided adjacent the platform, and a sensor coupled to the flexible member and positioned proximate the cell. The sensor is configured to detect a temperature of the cell.

  14. Multifunctional (NOx/CO/O2) Solid-State Sensors For Coal Combustion Control

    SciTech Connect (OSTI)

    Eric D. Wachsman

    2006-12-31T23:59:59.000Z

    Solid-state sensors were developed for coal combustion control and the understanding of sensing mechanisms was advanced. Several semiconducting metal oxides (p-type and n-type) were used to fabricate sensor electrodes. The adsorption/desorption characteristics and catalytic activities of these materials were measured with Temperature Programmed Desorption (TPD) and Temperature Programmed Reaction (TPR) experiments. The sensitivity, selectivity, and response time of these sensors were measured for steps of NO, NO{sub 2}, CO, CO{sub 2}, O{sub 2}, and H{sub 2}O vapor in simple N{sub 2}-balanced and multi-component, simulated combustion-exhaust streams. The role of electrode microstructure and fabrication parameters on sensing performance was investigated. Proof for the proposed sensing mechanism, Differential Electrode Equilibria, was demonstrated by relating the sensing behavior (sensitivities and cross-sensitivities) of the various electrode materials to their gas adsorption/desorption behaviors and catalytic activities. A multifunctional sensor array consisting of three sensing electrodes and an integrated heater and temperature sensors was fabricated with tape-casting and screen-printing and its NO{sub x} sensing performance was measured. The multifunctional sensor demonstrated it was possible to measure NO{sub 2} independent of NO by locally heating one of the sensing electrodes. The sensor technology was licensed to Fuel FX International, Inc. Fuel FX has obtained investor funding and is developing prototype sensors as a first step in their commercialization strategy for this technology.

  15. Fiber optic hydrogen sensor

    DOE Patents [OSTI]

    Buchanan, Bruce R. (1985 Willis, Batesburg, SC 29006); Prather, William S. (2419 Dickey Rd., Augusta, GA 30906)

    1992-01-01T23:59:59.000Z

    An 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.

  16. Fiber optic hydrogen sensor

    DOE Patents [OSTI]

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

    1991-01-01T23:59:59.000Z

    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.

  17. Micromechanical potentiometric sensors

    DOE Patents [OSTI]

    Thundat, Thomas G. (Knoxville, TN)

    2000-01-01T23:59:59.000Z

    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.

  18. Fiber optic hydrogen sensor

    DOE Patents [OSTI]

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

    1992-10-06T23:59:59.000Z

    An apparatus and method are described 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. 4 figs.

  19. Beam current sensor

    DOE Patents [OSTI]

    Kuchnir, M.; Mills, F.E.

    1984-09-28T23:59:59.000Z

    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.

  20. Beam current sensor

    DOE Patents [OSTI]

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

    1987-01-01T23:59:59.000Z

    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.

  1. Micromechanical calorimetric sensor

    DOE Patents [OSTI]

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

    2000-01-01T23:59:59.000Z

    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.

  2. active human visceral: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    walk, wave (one hand), wave (2 hands) Ta : Pekee II (Wany robotics, France) PTZ camera, motors + odometers, distance sensors, Kinect Ta Wolf, Christian 15 Human activity...

  3. active noise control: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    significant noise ... Hong, Seung Hyuck 2009-01-01 2 Design of an Active Noise Control System using Plasma Actuators Engineering Websites Summary: and analysed from sensors located...

  4. Virtual Oxygen Sensor for Innovative NOx and PM Emission Control...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Virtual Oxygen Sensor for Innovative NOx and PM Emission Control Technologies Virtual Oxygen Sensor for Innovative NOx and PM Emission Control Technologies A virtual O2 sensor for...

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

    DOE Patents [OSTI]

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

    2011-09-20T23:59:59.000Z

    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.

  6. Comparison of Unmanned Aerial Vehicle Platforms for Assessing Vegetation Cover in Sagebrush Steppe Ecosystems

    SciTech Connect (OSTI)

    Robert P. Breckenridge; Maxine Dakins; Stephen Bunting; Jerry Harbour; Sera White

    2011-09-01T23:59:59.000Z

    In this study, the use of unmanned aerial vehicles (UAVs) as a quick and safe method for monitoring biotic resources was evaluated. Vegetation cover and the amount of bare ground are important factors in understanding the sustainability of many ecosystems and assessment of rangeland health. Methods that improve speed and cost efficiency could greatly improve how biotic resources are monitored on western lands. Sagebrush steppe ecosystems provide important habitat for a variety of species (including sage grouse and pygmy rabbit). Improved methods are needed to support monitoring these habitats because there are not enough resource specialists or funds available for comprehensive ground evaluations. In this project, two UAV platforms, fixed wing and helicopter, were used to collect still-frame imagery to assess vegetation cover in sagebrush steppe ecosystems. This paper discusses the process for collecting and analyzing imagery from the UAVs to (1) estimate percent cover for six different vegetation types (shrub, dead shrub, grass, forb, litter, and bare ground) and (2) locate sage grouse using representative decoys. The field plots were located on the Idaho National Engineering (INL) site west of Idaho Falls, Idaho, in areas with varying amounts and types of vegetation cover. A software program called SamplePoint was used along with visual inspection to evaluate percent cover for the six cover types. Results were compared against standard field measurements to assess accuracy. The comparison of fixed-wing and helicopter UAV technology against field estimates shows good agreement for the measurement of bare ground. This study shows that if a high degree of detail and data accuracy is desired, then a helicopter UAV may be a good platform to use. If the data collection objective is to assess broad-scale landscape level changes, then the collection of imagery with a fixed-wing system is probably more appropriate.

  7. Using Unmanned Aerial Vehicles to Assess Vegetative Cover in Sagebrush Steppe Ecosytstems

    SciTech Connect (OSTI)

    Robert P. Breckenridge

    2005-09-01T23:59:59.000Z

    The Idaho National Laboratory (INL), in conjunction with the University of Idaho, is evaluating novel approaches for using unmanned aerial vehicles (UAVs) as a quicker and safer method for monitoring biotic resources. Evaluating vegetative cover is an important factor in understanding the sustainability of many ecosystems. In assessing vegetative cover, methods that improve accuracy and cost efficiency could revolutionize how biotic resources are monitored on western federal lands. Sagebrush steppe ecosystems provide important habitat for a variety of species, some of which are important indicator species (e.g., sage grouse). Improved methods are needed to support monitoring these habitats because there are not enough resource specialists or funds available for comprehensive ground evaluation of these ecosystems. In this project, two types of UAV platforms (fixed wing and helicopter) were used to collect still-frame imagery to assess cover in sagebrush steppe ecosystems. This paper discusses the process for collecting and analyzing imagery from the UAVs to (1) estimate total percent cover, (2) estimate percent cover for six different types of vegetation, and (3) locate sage grouse based on representative decoys. The field plots were located on the INL site west of Idaho Falls, Idaho, in areas with varying amounts and types of vegetative cover. A software program called SamplePoint developed by the U.S. Department of Agriculture, Agricultural Research Service (USDA-ARS) was used to evaluate the imagery for percent cover for the six vegetation types (bare ground, litter, shrubs, dead shrubs, grasses, and forbs). Results were compared against standard field measurements to assess accuracy.

  8. Hurricane Activity and the Large-Scale Pattern of Spread of an Invasive Plant Species

    E-Print Network [OSTI]

    Cronin, James T.

    historical aerial imagery to determine the growth rate of invasive Phragmites australis patches in wetlands where P. australis had room for unrestricted growth. Over the past several decades, invasive P. australis stands expanded in size by 6­35% per year. Based on tropical storm and hurricane activity over

  9. Energy Aware Self-Organizing Density Management in Wireless Sensor Networks

    E-Print Network [OSTI]

    Merrer, Erwan Le; Kermarrec, Anne-Marie; Viana, Aline; Bertier, Marin

    2008-01-01T23:59:59.000Z

    Energy consumption is the most important factor that determines sensor node lifetime. The optimization of wireless sensor network lifetime targets not only the reduction of energy consumption of a single sensor node but also the extension of the entire network lifetime. We propose a simple and adaptive energy-conserving topology management scheme, called SAND (Self-Organizing Active Node Density). SAND is fully decentralized and relies on a distributed probing approach and on the redundancy resolution of sensors for energy optimizations, while preserving the data forwarding and sensing capabilities of the network. We present the SAND's algorithm, its analysis of convergence, and simulation results. Simulation results show that, though slightly increasing path lengths from sensor to sink nodes, the proposed scheme improves significantly the network lifetime for different neighborhood densities degrees, while preserving both sensing and routing fidelity.

  10. New Electronic Sensors Stick to Your Skin -Heart Rate Monitors -Popular Mechanics http://www.popularmechanics.com/science/health/breakthroughs/new-electronic-sensors-stick-to-your-skin?click=pm_latest[8/14/2011 5:59:45 AM

    E-Print Network [OSTI]

    Rogers, John A.

    New Electronic Sensors Stick to Your Skin - Heart Rate Monitors - Popular Mechanics http://www Electronic Sensors That Stick to Your Skin Like Temporary Tattoos Nice tattoo. Or is it a heart-rate monitor to measure the electrical activity of the heart, muscles and brain. And using the same principles behind

  11. 752 IEEE SENSORS JOURNAL, VOL. 9, NO. 7, JULY 2009 Which Photodiode to Use: A Comparison of

    E-Print Network [OSTI]

    Cauwenberghs, Gert

    752 IEEE SENSORS JOURNAL, VOL. 9, NO. 7, JULY 2009 Which Photodiode to Use: A Comparison of CMOS architecture and the photosensitive structure. This paper presents a comparison of three photodiode structures active pixel sensor, where the output depends on the photodiode capacitance, and one incorporating an in

  12. Condition monitoring through advanced sensor and computational technology : final report (January 2002 to May 2005).

    SciTech Connect (OSTI)

    Kim, Jung-Taek (Korea Atomic Energy Research Institute, Daejon, Korea); Luk, Vincent K.

    2005-05-01T23:59:59.000Z

    The overall goal of this joint research project was to develop and demonstrate advanced sensors and computational technology for continuous monitoring of the condition of components, structures, and systems in advanced and next-generation nuclear power plants (NPPs). This project included investigating and adapting several advanced sensor technologies from Korean and US national laboratory research communities, some of which were developed and applied in non-nuclear industries. The project team investigated and developed sophisticated signal processing, noise reduction, and pattern recognition techniques and algorithms. The researchers installed sensors and conducted condition monitoring tests on two test loops, a check valve (an active component) and a piping elbow (a passive component), to demonstrate the feasibility of using advanced sensors and computational technology to achieve the project goal. Acoustic emission (AE) devices, optical fiber sensors, accelerometers, and ultrasonic transducers (UTs) were used to detect mechanical vibratory response of check valve and piping elbow in normal and degraded configurations. Chemical sensors were also installed to monitor the water chemistry in the piping elbow test loop. Analysis results of processed sensor data indicate that it is feasible to differentiate between the normal and degraded (with selected degradation mechanisms) configurations of these two components from the acquired sensor signals, but it is questionable that these methods can reliably identify the level and type of degradation. Additional research and development efforts are needed to refine the differentiation techniques and to reduce the level of uncertainties.

  13. Low noise optical position sensor

    DOE Patents [OSTI]

    Spear, Jonathan David (Berkeley, CA)

    1999-01-01T23:59:59.000Z

    A novel optical position sensor is described that uses two component photodiodes electrically connected in parallel, with opposing polarities. A lens provides optical gain and restricts the acceptance angle of the detector. The response of the device to displacements of an optical spot is similar to that of a conventional bi-cell type position sensitive detector. However, the component photodiode design enables simpler electronic amplification with inherently less electrical noise than the bi-cell. Measurements by the sensor of the pointing noise of a focused helium-neon laser as a function of frequency demonstrate high sensitivity and suitability for optical probe beam deflection experiments.

  14. Low noise optical position sensor

    DOE Patents [OSTI]

    Spear, J.D.

    1999-03-09T23:59:59.000Z

    A novel optical position sensor is described that uses two component photodiodes electrically connected in parallel, with opposing polarities. A lens provides optical gain and restricts the acceptance angle of the detector. The response of the device to displacements of an optical spot is similar to that of a conventional bi-cell type position sensitive detector. However, the component photodiode design enables simpler electronic amplification with inherently less electrical noise than the bi-cell. Measurements by the sensor of the pointing noise of a focused helium-neon laser as a function of frequency demonstrate high sensitivity and suitability for optical probe beam deflection experiments. 14 figs.

  15. Pressure sensor for sealed containers

    DOE Patents [OSTI]

    Hodges, Franklin R. (Loudon, TN)

    2001-01-01T23:59:59.000Z

    A magnetic pressure sensor for sensing a pressure change inside a sealed container. The sensor includes a sealed deformable vessel having a first end attachable to an interior surface of the sealed container, and a second end. A magnet mounted to the vessel second end defining a distance away from the container surface provides an externally detectable magnetic field. A pressure change inside the sealed container causes deformation of the vessel changing the distance of the magnet away from the container surface, and thus the detectable intensity of the magnetic field.

  16. Aerial Measurement of Radioxenon Concentration off the West Coast of Vancouver Island following the Fukushima Reactor Accident

    E-Print Network [OSTI]

    L. E. Sinclair; H. C. J. Seywerd; R. Fortin; J. M. Carson; P. R. B. Saull; M. J. Coyle; R. A. Van Brabant; J. L. Buckle; S. M. Desjardins; R. M. Hall

    2011-06-20T23:59:59.000Z

    In response to the Fukushima nuclear reactor accident, on March 20th, 2011, Natural Resources Canada conducted aerial radiation surveys over water just off of the west coast of Vancouver Island. Dose-rate levels were found to be consistent with background radiation, however a clear signal due to Xe-133 was observed. Methods to extract Xe-133 count rates from the measured spectra, and to determine the corresponding Xe-133 volumetric concentration, were developed. The measurements indicate that Xe-133 concentrations on average lie in the range of 30 to 70 Bq/m3.

  17. Underwater Data Collection Using Robotic Sensor Networks

    E-Print Network [OSTI]

    Hollinger, Geoffrey A.

    We examine the problem of utilizing an autonomous underwater vehicle (AUV) to collect data from an underwater sensor network. The sensors in the network are equipped with acoustic modems that provide noisy, range-limited ...

  18. Sensor network localization based on natural phenomena

    E-Print Network [OSTI]

    Kim, Daniel Sang

    2006-01-01T23:59:59.000Z

    Autonomous localization is crucial for many sensor network applications. The goal of this thesis is to develop a distributed localization algorithm for the PLUG indoor sensor network by analyzing sound and light sensory ...

  19. Obtaining accurate measurement using redundant sensors

    E-Print Network [OSTI]

    Burnett, Michael Scott

    2012-06-07T23:59:59.000Z

    Conventional wisdom suggests to accomplish accurate measurement, the sensors used must have high precision and excellent dynamic range. This generally results in sensor systems that are complex, costly, and often sensitive to environmental factors...

  20. Design guidelines for optical resonator biochemical sensors

    E-Print Network [OSTI]

    Kimerling, Lionel C.

    In this paper, we propose a design tool for dielectric optical resonator-based biochemical refractometry sensors. Analogous to the widely accepted photodetector figure of merit, the detectivity D*, we introduce a new sensor ...

  1. Automatic Calibration of Multiple Coplanar Sensors

    E-Print Network [OSTI]

    Brookshire, Jonathan

    This paper describes an algorithm for recovering the rigid 3-DOF transformation (offset and rotation) between pairs of sensors mounted rigidly in a common plane on a mobile robot. The algorithm requires only a set of sensor ...

  2. A standalone capacitively coupled occupancy sensor

    E-Print Network [OSTI]

    Thompson, William H., M. Eng. Massachusetts Institute of Technology

    2013-01-01T23:59:59.000Z

    This thesis presents the design and implementation of a standalone, capacitively coupled, occupancy sensor. Unlike previous iterations, the new sensor is decoupled from the fluorescent lamp. A well controlled, high voltage ...

  3. Adaptive sampling in autonomous marine sensor networks

    E-Print Network [OSTI]

    Eickstedt, Donald Patrick

    2006-01-01T23:59:59.000Z

    In this thesis, an innovative architecture for real-time adaptive and cooperative control of autonomous sensor platforms in a marine sensor network is described in the context of the autonomous oceanographic network scenario. ...

  4. IEEE SENSORS JOURNAL, VOL. 13, NO. 9, SEPTEMBER 2013 3405 A Soft Strain Sensor Based on

    E-Print Network [OSTI]

    Park, Yong-Lae

    IEEE SENSORS JOURNAL, VOL. 13, NO. 9, SEPTEMBER 2013 3405 A Soft Strain Sensor Based on Ionic and Vincent Duchaine Abstract--A novel soft strain sensor capable of withstand- ing strains of up to 100% is described. The sensor is made of a hyperelastic silicone elastomer that contains embedded microchannels

  5. Sensors and Actuators A xxx (2004) xxxxxx Micromachined silicon force sensor based on diffractive optical

    E-Print Network [OSTI]

    Quake, Stephen R.

    Sensors and Actuators A xxx (2004) xxx­xxx Micromachined silicon force sensor based on diffractive-based force sensor integrated with a surface micromachined silicon-nitride probe for penetration and injection that is designed to only be sensitive to axial deflections of the probe. The optical-encoder force sensor exhibits

  6. CCEC Seminar Wireless Sensors for SemiconductorWireless Sensors for Semiconductor

    E-Print Network [OSTI]

    Akhmedov, Azer

    CCEC Seminar Wireless Sensors for SemiconductorWireless Sensors for Semiconductor Manufacturing perhaps. In this talk, we describe our efforts in developing a new class of wireless sensors for use in semiconductor manufacturing. These sensors are fully self-contained with on board power, communications

  7. High pressure fiber optic sensor system

    DOE Patents [OSTI]

    Guida, Renato; Xia, Hua; Lee, Boon K; Dekate, Sachin N

    2013-11-26T23:59:59.000Z

    The present application provides a fiber optic sensor system. The fiber optic sensor system may include a small diameter bellows, a large diameter bellows, and a fiber optic pressure sensor attached to the small diameter bellows. Contraction of the large diameter bellows under an applied pressure may cause the small diameter bellows to expand such that the fiber optic pressure sensor may measure the applied pressure.

  8. Sensors Synergistic With Nature For In-pile Nuclear Reactor Measurements

    SciTech Connect (OSTI)

    James A. Smith; Dale K. Kotter; Steven L. Garrett; Randall A. Ali

    2012-10-01T23:59:59.000Z

    To be able to evolve fuel and structural microstructure within a nuclear power reactor in an engineered manner, an effective extreme environment sensor must exist. The development of sensor technology for nondestructive and nonintrusive measurements in harsh environments is a very active field. However most of the effort has been in adapting existing sensing technology to meet the harsh environmental requirements. A different approach is being presented. The fundamental question that we are trying to answer is how do we take advantage of the harsh environment and maintain synergy between the sensor and the environment. This paper will discuss the synergistic senor being developed that takes advantage of the harsh environments.

  9. Error Detection, Factorization and Correction for Multi-View Scene Reconstruction from Aerial Imagery

    SciTech Connect (OSTI)

    Hess-Flores, M

    2011-11-10T23:59:59.000Z

    Scene reconstruction from video sequences has become a prominent computer vision research area in recent years, due to its large number of applications in fields such as security, robotics and virtual reality. Despite recent progress in this field, there are still a number of issues that manifest as incomplete, incorrect or computationally-expensive reconstructions. The engine behind achieving reconstruction is the matching of features between images, where common conditions such as occlusions, lighting changes and texture-less regions can all affect matching accuracy. Subsequent processes that rely on matching accuracy, such as camera parameter estimation, structure computation and non-linear parameter optimization, are also vulnerable to additional sources of error, such as degeneracies and mathematical instability. Detection and correction of errors, along with robustness in parameter solvers, are a must in order to achieve a very accurate final scene reconstruction. However, error detection is in general difficult due to the lack of ground-truth information about the given scene, such as the absolute position of scene points or GPS/IMU coordinates for the camera(s) viewing the scene. In this dissertation, methods are presented for the detection, factorization and correction of error sources present in all stages of a scene reconstruction pipeline from video, in the absence of ground-truth knowledge. Two main applications are discussed. The first set of algorithms derive total structural error measurements after an initial scene structure computation and factorize errors into those related to the underlying feature matching process and those related to camera parameter estimation. A brute-force local correction of inaccurate feature matches is presented, as well as an improved conditioning scheme for non-linear parameter optimization which applies weights on input parameters in proportion to estimated camera parameter errors. Another application is in reconstruction pre-processing, where an algorithm detects and discards frames that would lead to inaccurate feature matching, camera pose estimation degeneracies or mathematical instability in structure computation based on a residual error comparison between two different match motion models. The presented algorithms were designed for aerial video but have been proven to work across different scene types and camera motions, and for both real and synthetic scenes.

  10. Sensors 2002, 2, 244-257 ISSN 1424-8220

    E-Print Network [OSTI]

    Mason, Andrew

    Sensors 2002, 2, 244-257 sensors ISSN 1424-8220 © 2002 by MDPI http://www.mdpi.net/sensors Invited Paper Communication Buses and Protocols for Sensor Networks Junwei Zhou and Andrew Mason* Department communication buses which are commonly used in sensor networks, discusses sensor network architectures

  11. Fiber-optic liquid level sensor

    DOE Patents [OSTI]

    Weiss, Jonathan D. (Albuquerque, NM)

    1991-01-01T23:59:59.000Z

    A fiber-optic liquid level sensor measures the height of a column of liquid through the hydrostatic pressure it produces. The sensor employs a fiber-optic displacement sensor to detect the pressure-induced displacement of the center of a corrugated diaphragm.

  12. Fiber optic sensor and method for making

    DOE Patents [OSTI]

    Vartuli, James Scott; Bousman, Kenneth Sherwood; Deng, Kung-Li; McEvoy, Kevin Paul; Xia, Hua

    2010-05-18T23:59:59.000Z

    A fiber optic sensor including a fiber having a modified surface integral with the fiber wherein the modified surface includes an open pore network with optical agents dispersed within the open pores of the open pore network. Methods for preparing the fiber optic sensor are also provided. The fiber optic sensors can withstand high temperatures and harsh environments.

  13. Compressive Computation in Analog VLSI Motion Sensors

    E-Print Network [OSTI]

    Deutschmann, Rainer

    Compressive Computation in Analog VLSI Motion Sensors Rainer A. Deutschmann1 and Oliver G. Wenisch2 analog VLSI mo- tion sensors developed in the past. We show how their pixel-parallel architecture can is best suited to perform the algorithm even at high noise levels. 1 Analog VLSI Motion Sensors Inthe past

  14. 700:20131001.1211 Fine Sun Sensor

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    700:20131001.1211 Fine Sun Sensor The Laboratory for Atmospheric and Space Physics (LASP) at the University of Colorado, Boulder is a world leader in space-based research including measurements of the Sun with respect to sun center. LASP has built sun position sensors for decades beginning with sensors for sub

  15. Fiber optic coupled optical sensor

    DOE Patents [OSTI]

    Fleming, Kevin J. (Albuquerque, NM)

    2001-01-01T23:59:59.000Z

    A displacement sensor includes a first optical fiber for radiating light to a target, and a second optical fiber for receiving light from the target. The end of the first fiber is adjacent and not axially aligned with the second fiber end. A lens focuses light from the first fiber onto the target and light from the target onto the second fiber.

  16. Network Embedded Systems Sensor Networks

    E-Print Network [OSTI]

    Amir, Yair

    Battery Energy Reserve Manager = Bank Each task requests an account with conditions W fraction Tracking 9 #12;Virtual Battery: An Energy Reserve Abstraction for Embedded Sensor Networks Qing Cao of real battery allocated N number of energy installments L expected lifetime of the task C

  17. Battery system with temperature sensors

    DOE Patents [OSTI]

    Wood, Steven J.; Trester, Dale B.

    2012-11-13T23:59:59.000Z

    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.

  18. Buried fiber optic intrusion sensor

    E-Print Network [OSTI]

    Maier, Eric William

    2004-09-30T23:59:59.000Z

    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...

  19. Microelectromechanical systems contact stress sensor

    SciTech Connect (OSTI)

    Kotovsky, Jack (Oakland, CA)

    2007-12-25T23:59:59.000Z

    A microelectromechanical systems stress sensor comprising a microelectromechanical systems silicon body. A recess is formed in the silicon body. A silicon element extends into the recess. The silicon element has limited freedom of movement within the recess. An electrical circuit in the silicon element includes a piezoresistor material that allows for sensing changes in resistance that is proportional to bending of the silicon element.

  20. Advanced exterior sensor project : final report, September 2004.

    SciTech Connect (OSTI)

    Ashby, M. Rodema

    2004-12-01T23:59:59.000Z

    This report (1) summarizes the overall design of the Advanced Exterior Sensor (AES) system to include detailed descriptions of system components, (2) describes the work accomplished throughout FY04 to evaluate the current health of the original prototype and to return it to operation, (3) describes the status of the AES and the AES project as of September 2004, and (4) details activities planned to complete modernization of the system to include development and testing of the second-generation AES prototype.

  1. Optical sensors and multisensor arrays containing thin film electroluminescent devices

    DOE Patents [OSTI]

    Aylott, Jonathan W. (Ann Arbor, MI); Chen-Esterlit, Zoe (Ann Arbor, MI); Friedl, Jon H. (Ames, IA); Kopelman, Raoul (Ann Arbor, MI); Savvateev, Vadim N. (Ames, IA); Shinar, Joseph (Ames, IA)

    2001-12-18T23:59:59.000Z

    Optical sensor, probe and array devices for detecting chemical biological, and physical analytes. The devices include an analyte-sensitive layer optically coupled to a thin film electroluminescent layer which activates the analyte-sensitive layer to provide an optical response. The optical response varies depending upon the presence of an analyte and is detected by a photodetector and analyzed to determine the properties of the analyte.

  2. Microscale autonomous sensor and communications module

    DOE Patents [OSTI]

    Okandan, Murat; Nielson, Gregory N

    2014-03-25T23:59:59.000Z

    Various technologies pertaining to a microscale autonomous sensor and communications module are described herein. Such a module includes a sensor that generates a sensor signal that is indicative of an environmental parameter. An integrated circuit receives the sensor signal and generates an output signal based at least in part upon the sensor signal. An optical emitter receives the output signal and generates an optical signal as a function of the output signal. An energy storage device is configured to provide power to at least the integrated circuit and the optical emitter, and wherein the module has a relatively small diameter and thickness.

  3. Aerial radiological and photographic survey of eleven atolls and two islands within the Northern Marshall Islands. Dates of surveys, July-November 1978

    SciTech Connect (OSTI)

    Not Available

    1981-06-01T23:59:59.000Z

    An aerial radiological survey was conducted over eleven atolls and two islands within the northern Marshall Islands between September and November 1978. This survey was part of a comprehensive radiological survey, which included extensive terrestrial and marine sampling, to determine possible residual contamination which might remain as a result of the United States nuclear testing program conducted at Bikini Enewetak Atolls between 1946 and 1958. A similar survey was conducted at Enewetak Atoll in 1972. The present survey covered those atolls known to have received direct fallout from the Bravo event, conducted in March 1954 at Bikini Atoll. These included Bikini, Rongelap, Rongerik, Ailinginae, Bikar, Taka, and Utirik Atolls. In addition, several atolls and islands which might have been at the fringes of the Bravo fallout were also surveyed, including Likiep and Ailuk Atolls, Jemo and Mejit Islands, and Wotho Atoll. Ujelang Atoll, which lies approximately 200 km southwest of Enewetak, was also surveyed. Island-averaged terrestrial exposure rates in the range of 30 to 50 ..mu..R/h were observed over parts of Bikini Atoll, including Bikini Island, and over the northern part of Rongelap Atoll. Levels over southern Rongelap and over Rongerik Atoll ranged from 4 to 7 ..mu..R/h. Levels were somewhat lower at Ailinginae Atoll (approximately 2 ..mu..R/h) and at Utirik Atoll (approximately 0.7 ..mu..R/h). The variations observed were consistent with what might be expected from the fallout pattern of the Bravo event. Levels at Ailuk, Likiep, Wotho and Ujelang Atolls and at Mejit and Jemo Islands were consistent with /sup 137/Cs activity, due to worldwide fallout, observed within the United States and at other locations in the central Pacific. These four atolls and the two islands, therefore, do not appear to have recieved any significant direct contamination from the Bravo event or the other tests conducted at Bikini and Enewetak Atolls.

  4. Feasibility study of long-life micro fuel cell power supply for sensor networks for space and terrestrial applications

    E-Print Network [OSTI]

    Manyapu, Kavya Kamal

    2010-01-01T23:59:59.000Z

    Sensor networks used for activities like border security, search and rescue, planetary exploration, commonly operate in harsh environments for long durations, where human supervision is minimal. A major challenge confronting ...

  5. Sensor test facilities and capabilities at the Nevada Test Site

    SciTech Connect (OSTI)

    Boyer, W.B.; Burke, L.J.; Gomez, B.J.; Livingston, L.; Nelson, D.S.; Smathers, D.C.

    1996-12-31T23:59:59.000Z

    Sandia National Laboratories has recently developed two major field test capabilities for unattended ground sensor systems at the Department of energy`s Nevada Test Site (NTS). The first capability utilizes the NTS large area, varied terrain, and intrasite communications systems for testing sensors for detecting and tracking vehicular traffic. Sensor and ground truth data can be collected at either of two secure control centers. This system also includes an automated ground truth capability that consists of differential Global Positioning Satellite (GPS) receivers on test vehicles and live TV coverage of critical road sections. Finally there is a high-speed, secure computer network link between the control centers and the Air Force`s Theater Air Command and Control Simulation Facility in Albuquerque NM. The second capability is Bunker 2-300. It is a facility for evaluating advanced sensor systems for monitoring activities in underground cut-and-cover facilities. The main part of the facility consists of an underground bunker with three large rooms for operating various types of equipment. This equipment includes simulated chemical production machinery and controlled seismic and acoustic signal sources. There has been a thorough geologic and electromagnetic characterization of the region around the bunker. Since the facility is in a remote location, it is well-isolated from seismic, acoustic, and electromagnetic interference.

  6. Fabrication of thermal microphotonic sensors and sensor arrays

    DOE Patents [OSTI]

    Shaw, Michael J. (Tijeras, NM); Watts, Michael R. (Albuquerque, NM); Nielson, Gregory N. (Albuquerque, NM)

    2010-10-26T23:59:59.000Z

    A thermal microphotonic sensor is fabricated on a silicon substrate by etching an opening and a trench into the substrate, and then filling in the opening and trench with silicon oxide which can be deposited or formed by thermally oxidizing a portion of the silicon substrate surrounding the opening and trench. The silicon oxide forms a support post for an optical resonator which is subsequently formed from a layer of silicon nitride, and also forms a base for an optical waveguide formed from the silicon nitride layer. Part of the silicon substrate can be selectively etched away to elevate the waveguide and resonator. The thermal microphotonic sensor, which is useful to detect infrared radiation via a change in the evanescent coupling of light between the waveguide and resonator, can be formed as a single device or as an array.

  7. iCalm: Measuring electrodermal activity in almost any setting

    E-Print Network [OSTI]

    Hedman, Elliott Bruce

    The iCalm sensor is a wireless, wearable, washable wristband that can measure electrodermal activity and physical activity in almost any natural setting. This platform has many applications including health monitoring for ...

  8. DEVELOPMENT OFA WIRELESS ACTIVE SYSTEM FOR TPS STRUCTURAL HEALTH MONITORING

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    TPS damage. Several essential aspects are being studied: (a) development of high temperature aspects are being studied: (a) development of high temperature piezoelectric wafer active sensor (HTDEVELOPMENT OFA WIRELESS ACTIVE SYSTEM FOR TPS STRUCTURAL HEALTH MONITORING Victor Giurgiutiu1

  9. Real-Time Spatio-Temporal Query Processing in Mobile Ad-Hoc Sensor Networks

    E-Print Network [OSTI]

    that has multiple sensors (e.g., mo- tion sensors, acoustic sensors, infrared light emitting diodes, and pa

  10. Synthesis of Metal Oxide Nanomaterials for Chemical Sensors by Molecular Beam Epitaxy

    SciTech Connect (OSTI)

    Nandasiri, Manjula I.; Kuchibhatla, Satyanarayana V N T; Thevuthasan, Suntharampillai

    2013-12-01T23:59:59.000Z

    Since the industrial revolution, detection and monitoring of toxic matter, chemical wastes, and air pollutants has become an important environmental issue. Thus, it leads to the development of chemical sensors for various environmental applications. The recent disastrous oil spills over the near-surface of ocean due to the offshore drilling emphasize the use of chemical sensors for prevention and monitoring of the processes that might lead to these mishaps.1, 2 Chemical sensors operated on a simple principle that the sensing platform undergoes a detectable change when exposed to the target substance to be sensed. Among all the types of chemical sensors, solid state gas sensors have attracted a great deal of attention due to their advantages such as high sensitivity, greater selectivity, portability, high stability and low cost.3, 4 Especially, semiconducting metal oxides such as SnO2, TiO2, and WO3 have been widely used as the active sensing platforms in solid state gas sensors.5 For the enhanced properties of solid state gas sensors, finding new sensing materials or development of existing materials will be needed. Thus, nanostructured materials such as nanotubes,6-8 nanowires,9-11 nanorods,12-15 nanobelts,16, 17 and nano-scale thin films18-23 have been synthesized and studied for chemical sensing applications.

  11. Ammonia and ammonium hydroxide sensors for ammonia/water absorption machines: Literature review and data compilation

    SciTech Connect (OSTI)

    Anheier, N.C. Jr.; McDonald, C.E.; Cuta, J.M.; Cuta, F.M.; Olsen, K.B.

    1995-05-01T23:59:59.000Z

    This report describes an evaluation of various sensing techniques for determining the ammonia concentration in the working fluid of ammonia/water absorption cycle systems. The purpose of this work was to determine if any existing sensor technology or instrumentation could provide an accurate, reliable, and cost-effective continuous measure of ammonia concentration in water. The resulting information will be used for design optimization and cycle control in an ammonia-absorption heat pump. PNL researchers evaluated each sensing technology against a set of general requirements characterizing the potential operating conditions within the absorption cycle. The criteria included the physical constraints for in situ operation, sensor characteristics, and sensor application. PNL performed an extensive literature search, which uncovered several promising sensing technologies that might be applicable to this problem. Sixty-two references were investigated, and 33 commercial vendors were identified as having ammonia sensors. The technologies for ammonia sensing are acoustic wave, refractive index, electrode, thermal, ion-selective field-effect transistor (ISFET), electrical conductivity, pH/colormetric, and optical absorption. Based on information acquired in the literature search, PNL recommends that follow-on activities focus on ISFET devices and a fiber optic evanescent sensor with a colormetric indicator. The ISFET and fiber optic evanescent sensor are inherently microminiature and capable of in situ measurements. Further, both techniques have been demonstrated selective to the ammonium ion (NH{sub 4}{sup +}). The primary issue remaining is how to make the sensors sufficiently corrosion-resistant to be useful in practice.

  12. Six degree of freedom sensor

    DOE Patents [OSTI]

    Vann, C.S.

    1999-03-16T23:59:59.000Z

    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.

  13. ION 2006, Fort Worth TX, 26-29 September 2006 1 GPS/INS/G Sensors/Yaw Rate Sensor/Wheel

    E-Print Network [OSTI]

    Calgary, University of

    of four integration strategies, namely a GPS/INS integrated system, a GPS/INS/G sensors/Yaw rate sensor/Wheel speed sensor system with two non- holonomic constraints, a GPS/INS/G sensors/Yaw rate sensor/Wheel speed/INS/G sensors/Yaw rate sensor/Wheel speed sensor system with the removal of the lateral constraint

  14. Amorphous Diamond MEMS and Sensors

    SciTech Connect (OSTI)

    SULLIVAN, JOHN P.; FRIEDMANN, THOMAS A.; ASHBY, CAROL I.; DE BOER, MAARTEN P.; SCHUBERT, W. KENT; SHUL, RANDY J.; HOHLFELDER, ROBERT J.; LAVAN, D.A.

    2002-06-01T23:59:59.000Z

    This report describes a new microsystems technology for the creation of microsensors and microelectromechanical systems (MEMS) using stress-free amorphous diamond (aD) films. Stress-free aD is a new material that has mechanical properties close to that of crystalline diamond, and the material is particularly promising for the development of high sensitivity microsensors and rugged and reliable MEMS. Some of the unique properties of aD include the ability to easily tailor film stress from compressive to slightly tensile, hardness and stiffness 80-90% that of crystalline diamond, very high wear resistance, a hydrophobic surface, extreme chemical inertness, chemical compatibility with silicon, controllable electrical conductivity from insulating to conducting, and biocompatibility. A variety of MEMS structures were fabricated from this material and evaluated. These structures included electrostatically-actuated comb drives, micro-tensile test structures, singly- and doubly-clamped beams, and friction and wear test structures. It was found that surface micromachined MEMS could be fabricated in this material easily and that the hydrophobic surface of the film enabled the release of structures without the need for special drying procedures or the use of applied hydrophobic coatings. Measurements using these structures revealed that aD has a Young's modulus of {approx}650 GPa, a tensile fracture strength of 8 GPa, and a fracture toughness of 8 MPa{center_dot}m {sup 1/2}. These results suggest that this material may be suitable in applications where stiction or wear is an issue. Flexural plate wave (FPW) microsensors were also fabricated from aD. These devices use membranes of aD as thin as {approx}100 nm. The performance of the aD FPW sensors was evaluated for the detection of volatile organic compounds using ethyl cellulose as the sensor coating. For comparable membrane thicknesses, the aD sensors showed better performance than silicon nitride based sensors. Greater than one order of magnitude increase in chemical sensitivity is expected through the use of ultra-thin aD membranes in the FPW sensor. The discoveries and development of the aD microsystems technology that were made in this project have led to new research projects in the areas of aD bioMEMS and aD radio frequency MEMS.

  15. Aerial Survey Results for 131I Deposition on the Ground after the Fukushima Daiichi Nuclear Power Plant Accident

    SciTech Connect (OSTI)

    Torii, Tatsuo [JAEA; Sugita, Takeshi [JAEA; Okada, Colin E. [NSTec; Reed, Michael S. [NSTec; Blumenthal, Daniel J. [NNSA

    2013-08-01T23:59:59.000Z

    In March 2011 the second largest accidental release of radioactivity in history occurred at the Fukushima Daiichi nuclear power plant following a magnitude 9.0 earthquake and subsequent tsunami. Teams from the U.S. Department of Energy, National Nuclear Security Administration Office of Emergency Response performed aerial surveys to provide initial maps of the dispersal of radioactive material in Japan. The initial results from the surveys did not report the concentration of 131I. This work reports on analyses performed on the initial survey data by a joint Japan-US collaboration to determine 131I ground concentration. This information is potentially useful in reconstruction of the inhalation and external exposure doses from this short-lived radionuclide. The deposited concentration of 134Cs is also reported.

  16. A simulation model for the lifetime of wireless sensor networks

    E-Print Network [OSTI]

    Elleithy, Abdelrahman

    2012-01-01T23:59:59.000Z

    In this paper we present a model for the lifetime of wireless sensor networks. The model takes into consideration several parameters such as the total number of sensors, network size, percentage of sink nodes, location of sensors, the mobility of sensors, and power consumption. A definition of the life time of the network based on three different criteria is introduced; percentage of available power to total power, percentage of alive sensors to total sensors, and percentage of alive sink sensors to total sink sensors. A Matlab based simulator is developed for the introduced model. A number of wireless sensor networks scenarios are presented and discussed.

  17. Micromachined pressure sensors: Review and recent developments

    SciTech Connect (OSTI)

    Eaton, W.P.; Smith, J.H. [Sandia National Labs., Albuquerque, NM (United States). Intelligent Micromachines Dept.

    1997-03-01T23:59:59.000Z

    Since the discovery of piezoresistivity in silicon in the mid 1950s, silicon-based pressure sensors have been widely produced. Micromachining technology has greatly benefited from the success of the integrated circuits industry, burrowing materials, processes, and toolsets. Because of this, microelectromechanical systems (MEMS) are now poised to capture large segments of existing sensor markets and to catalyze the development of new markets. Given the emerging importance of MEMS, it is instructive to review the history of micromachined pressure sensors, and to examine new developments in the field. Pressure sensors will be the focus of this paper, starting from metal diaphragm sensors with bonded silicon strain gauges, and moving to present developments of surface-micromachined, optical, resonant, and smart pressure sensors. Considerations for diaphragm design will be discussed in detail, as well as additional considerations for capacitive and piezoresistive devices.

  18. Polymers for Chemical Sensors Using Hydrosilylation Chemistry

    SciTech Connect (OSTI)

    Grate, Jay W.; Kaganove, Steven N.; Nelson, David A.

    2001-06-28T23:59:59.000Z

    Sorbent and functionalized polymers play a key role in a diverse set of fields, including chemical sensors, separation membranes, solid phase extraction techniques, and chromatography. Sorbent polymers are critical to a number of sensor array or "electronic nose" systems. The responses of the sensors in the array give rise to patterns that can be used to distinguish one compound from another, provided that a sufficiently diverse set of sensing materials is present in the array. Figure 1 illustrates the concept of several sensors, each with a different sensor coating, giving rise to variable responses to an analyte that appear as a pattern in bar graph format. Using hydrosilylation as the bond-forming reaction, we have developed a versatile and efficient approach to developing sorbent polymers with diverse interactive properties for sensor applications. Both the chemical and physical properties of these polymers are predictable and tunable by design.

  19. Frustrated total internal reflection acoustic field sensor

    DOE Patents [OSTI]

    Kallman, Jeffrey S. (Pleasanton, CA)

    2000-01-01T23:59:59.000Z

    A frustrated total internal reflection acoustic field sensor which allows the acquisition of the acoustic field over an entire plane, all at once. The sensor finds use in acoustic holography and acoustic diffraction tomography. For example, the sensor may be produced by a transparent plate with transparent support members tall enough to support one or more flexible membranes at an appropriate height for frustrated total internal reflection to occur. An acoustic wave causes the membrane to deflect away from its quiescent position and thus changes the amount of light that tunnels through the gap formed by the support members and into the membrane, and so changes the amount of light reflected by the membrane. The sensor(s) is illuminated by a uniform tight field, and the reflection from the sensor yields acoustic wave amplitude and phase information which can be picked up electronically or otherwise.

  20. Application of Geiger-mode photo sensors in Cherenkov detectors

    E-Print Network [OSTI]

    Gamal Ahmed; Paul Buehler; Michael Cargnelli; Roland Hohler; Johann Marton; Herbert Orth; Ken Suzuki

    2010-08-31T23:59:59.000Z

    Silicon-based photosensors (SiPMs) working in the Geiger-mode represent an elegant solution for the readout of particle detectors working at low-light levels like Cherenkov detectors. Especially the insensitivity to magnetic fields makes this kind of sensors suitable for modern detector systems in subatomic physics which are usually employing magnets for momentum resolution. In our institute we are characterizing SiPMs of different manufacturers for selecting sensors and finding optimum operating conditions for given applications. Recently we designed and built a light concentrator prototype with 8x8 cells to increase the active photon detection area of an 8x8 SiPM (Hamamatsu MPPC S10931-100P) array. Monte Carlo studies, measurements of the collection efficiency, and tests with the MPPC were carried out. The status of these developments are presented.

  1. Application of Geiger-mode photo sensors in Cherenkov detectors

    E-Print Network [OSTI]

    Ahmed, Gamal; Cargnelli, Michael; Hohler, Roland; Marton, Johann; Orth, Herbert; Suzuki, Ken

    2010-01-01T23:59:59.000Z

    Silicon-based photosensors (SiPMs) working in the Geiger-mode represent an elegant solution for the readout of particle detectors working at low-light levels like Cherenkov detectors. Especially the insensitivity to magnetic fields makes this kind of sensors suitable for modern detector systems in subatomic physics which are usually employing magnets for momentum resolution. In our institute we are characterizing SiPMs of different manufacturers for selecting sensors and finding optimum operating conditions for given applications. Recently we designed and built a light concentrator prototype with 8x8 cells to increase the active photon detection area of an 8x8 SiPM (Hamamatsu MPPC S10931-100P) array. Monte Carlo studies, measurements of the collection efficiency, and tests with the MPPC were carried out. The status of these developments are presented.

  2. Nonlinear filtering in target tracking using cooperative mobile sensors

    E-Print Network [OSTI]

    Jiangping Hu; Xiaoming Hu

    2011-08-09T23:59:59.000Z

    Collaborative signal processing and sensor deployment have been among the most important research tasks in target tracking using networked sensors. In this paper, the mathematical model is formulated for single target tracking using mobile nonlinear scalar range sensors. Then a sensor deployment strategy is proposed for the mobile sensors and a nonlinear convergent filter is built to estimate the trajectory of the target.

  3. Sensors 2007, 7, 3428-3441 ISSN 1424-8220

    E-Print Network [OSTI]

    Lee, Zhongping

    Sensors 2007, 7, 3428-3441 sensors ISSN 1424-8220 © 2007 by MDPI www.mdpi.org/sensors Full Research-of-view Sensor (SeaWiFS, 7 bands), the Moderate-Resolution Imaging Spectrometer (MODIS, 8 bands), and the Medium sensors. Recently, Lee and Carder (2002) demonstrated that for adequate derivation of major properties

  4. Query Processing in Mobile Sensor Networks Wang-Chien Lee

    E-Print Network [OSTI]

    Giles, C. Lee

    , a sensor network for air pollution test, where all sensors are scattered in the air and transported to collect the data from the sensors about air pollution and traffic conditions. In comparison, vehicles, animals, air, and water). With self-propelling sensor nodes, a mobile sensor network is self

  5. Low-Cost Fiber Optic Pressure Sensor

    DOE Patents [OSTI]

    Sheem, Sang K. (Pleasanton, CA)

    2003-07-22T23:59:59.000Z

    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.

  6. Low-Cost Fiber Optic Pressure Sensor

    DOE Patents [OSTI]

    Sheem, Sang K. (Pleasanton, CA)

    2004-05-18T23:59:59.000Z

    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.

  7. Sensor Development for PEM Fuel Cell Systems

    SciTech Connect (OSTI)

    Steve Magee; Richard Gehman

    2005-07-12T23:59:59.000Z

    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.

  8. Carbon nanotube temperature and pressure sensors

    DOE Patents [OSTI]

    Ivanov, Ilia N; Geohegan, David Bruce

    2013-10-29T23:59:59.000Z

    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.

  9. E-Print Network 3.0 - activity indicator model Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    on the GUI. The pur- pose of this work is to explore how... observation streams from sensors, activities can be ... Source: Modayil, Joseph - Department of Computing Science,...

  10. E-Print Network 3.0 - active constellation extension Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Times Summary: to produce rainfall accumulation maps using a combined active radar and passive radiometer set of sensors... smaller constellation satellites which carry a subset of...

  11. E-Print Network 3.0 - active living environment Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    activities in our on-campus smart apartment testbed. Keywords Smart environments Passive sensors... complex (e.g., food preparation, medication man- agement, telephone...

  12. Radionuclide Sensors for Environmental Monitoring: From Flow...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to Equilibration-Based Radionuclide Sensors for Environmental Monitoring: From Flow Injection Solid-Phase Absorptiometry to Equilibration-Based Abstract: The development...

  13. Chemical preconcentrator with integral thermal flow sensor

    DOE Patents [OSTI]

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

    2003-01-01T23:59:59.000Z

    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.

  14. MB3a Infrasound Sensor Evaluation.

    SciTech Connect (OSTI)

    Merchant, Bion J.; McDowell, Kyle D.

    2014-11-01T23:59:59.000Z

    Sandia National Laboratories has tested and evaluated a new infrasound sensor, the MB3a, manufactured by Seismo Wave. These infrasound sensors measure pressure output by a methodology developed by researchers at the French Alternative Energies and Atomic Energy Commission (CEA) and the technology was recently licensed to Seismo Wave for production and sales. The purpose of the infrasound sensor evaluation was to determine a measured sensitivity, transfer function, power, self-noise, dynamic range, seismic sensitivity, and self- calibration ability. The MB3a infrasound sensors are being evaluated for potential use in the International Monitoring System (IMS) of the Comprehensive Nuclear Test-Ban-Treaty Organization (CTBTO).

  15. Robust Semidefinite Programming Approaches for Sensor Network ...

    E-Print Network [OSTI]

    2006-05-21T23:59:59.000Z

    May 21, 2006 ... Sample random problem with 20 sensors, 12 anchors . ... Section 2 with background and notation, including information on the linear...

  16. Electrochemical NOx Sensors for Monitoring Diesel Emissions

    Broader source: Energy.gov (indexed) [DOE]

    x Sensors for Monitoring Diesel Emissions This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract...

  17. Uncertainty Quantification Techniques for Sensor Calibration...

    Office of Scientific and Technical Information (OSTI)

    Uncertainty Quantification Techniques for Sensor Calibration Monitoring in Nuclear Power Plants Re-direct Destination: This report describes research towards the development of...

  18. Sensors, Controls, and Transactive Energy Research | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy Research Sensors, Controls, and Transactive Energy Research Lead Performer: Oak Ridge National Laboratory - Oak Ridge, TN DOE Funding: 2,700,000 Cost Share: NA...

  19. An Inexpensive Brazable Material for Magnetostrictive Sensors...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    More Like This Return to Search An Inexpensive Brazable Material for Magnetostrictive Sensors and Other Applications Based on Ferrite Materials Ames Laboratory Contact AMES About...

  20. Advanced Sensors, Control, Platforms, and Modeling

    Office of Environmental Management (EM)

    112 productivity and safety, and boost the U.S. sensor and automation industry. 113 2. Technology Assessment and Potential 114 2.1 Performance advances 115 DRAFT -...

  1. Uncertainty Quantification Techniques for Sensor Calibration...

    Office of Scientific and Technical Information (OSTI)

    Uncertainty Quantification Techniques for Sensor Calibration Monitoring in Nuclear Power Plants Re-direct Destination: Temp Data Fields Ramuhalli, Pradeep; Lin, Guang; Crawford,...

  2. Electrochemical NOx Sensor for Monitoring Diesel Emissions

    Broader source: Energy.gov (indexed) [DOE]

    advanced prototype built on an alumina substrate, provided by Ford, with an integrated heating element * Substrate packaged by U.S. automotive supplier into a commercial sensor...

  3. Structure and yarn sensor for fabric

    DOE Patents [OSTI]

    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

    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.

  4. Sensors and Actuators B 107 (2005) 121125 Two photon fluorescence sensors based on resonant grating

    E-Print Network [OSTI]

    Friesem, Asher A.

    Sensors and Actuators B 107 (2005) 121­125 Two photon fluorescence sensors based on resonant the excitation and emission radia- tion reduces the background noise, the static photobleaching.07.040 #12;122 T. Katchalski et al. / Sensors and Actuators B 107 (2005) 121­125 lar, they are compact

  5. SET/RESET PULSE CIRCUITS FOR MAGNETIC SENSORS AN-201 Honeywell's line of magnetoresistive permalloy sensors

    E-Print Network [OSTI]

    Kleinfeld, David

    SET/RESET PULSE CIRCUITS FOR MAGNETIC SENSORS AN-201 Honeywell's line of magnetoresistive permalloy sensors are sensitive to magnetic fields less than 100 µgauss in a ±2 gauss range. In order to achieve, or flip, the polarity of film magnetization, thus changing the sensor characteristics. Following

  6. Sensors and Actuators B 118 (2006) 135141 Low temperature indium oxide gas sensors

    E-Print Network [OSTI]

    Sensors and Actuators B 118 (2006) 135­141 Low temperature indium oxide gas sensors M. Sucheaa rights reserved. Keywords: Metal oxide thin films; InOx; Gas sensors; Ozone 1. Introduction The interest's attractive for many areas such as transparent electrodes for solar cells and flat panel displays

  7. Power Sources for Wireless Sensor Abstract. Wireless sensor networks are poised to become a very significant

    E-Print Network [OSTI]

    Frechette, Luc G.

    Power Sources for Wireless Sensor Networks Abstract. Wireless sensor networks are poised to become a very significant enabling technology in many sectors. Already a few very low power wireless sensor environment, alternative power sources must be employed. This paper reviews many potential power sources

  8. Volatile organic compound sensor system

    DOE Patents [OSTI]

    Schabron, John F. (Laramie, WY); Rovani, Jr., Joseph F. (Laramie, WY); Bomstad, Theresa M. (Waxahachie, TX); Sorini-Wong, Susan S. (Laramie, WY); Wong, Gregory K. (Laramie, WY)

    2011-03-01T23:59:59.000Z

    Generally, this invention relates to the development of field monitoring methodology for new substances and sensing chemical warfare agents (CWAs) and terrorist substances. It also relates to a portable test kit which may be utilized to measure concentrations of halogenated volatile organic compounds (VOCs) in the field. Specifically it relates to systems for reliably field sensing the potential presence of such items while also distinguishing them from other elements potentially present. It also relates to overall systems and processes for sensing, reacting, and responding to an indicated presence of such substance, including modifications of existing halogenated sensors and arrayed sensing systems and methods.

  9. sensors | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsrucLasDelivered energy consumption byAbout SRNLBuildingsScattering at JLab and LeadSensors &

  10. Oscillator-Based Touch Sensor with Adaptive Resolution

    E-Print Network [OSTI]

    Du, Li

    2013-01-01T23:59:59.000Z

    Die photo of the touch sensor circuit.223.9 Fig.3.9 Die photo of the touch sensor circuit Chapter 4.photo . 20 Chapter 4. Test of the touch sensor

  11. Precise Time Synchronization for Wireless Sensor Networks using the

    E-Print Network [OSTI]

    of Information Technology and Electrical Engineering January 2010 #12;#12;Abstract For sensor networks a wide to the needs of data gathering, the main applica- tion of sensor networks. Sensor data is often useless

  12. Monitor and control of cockroach locomotion with piezoelectric sensors

    E-Print Network [OSTI]

    Cooper, Rodrigo Alejandro

    2009-05-15T23:59:59.000Z

    sensors; laboratory in vitro testing of sensors and cockroaches; and methodology to control them. This research successfully built an experimental foundation for sensor and roach testing and developed a methodology for roach locomotion control...

  13. Vision and Inertial Sensor Based Drive Trains Control

    E-Print Network [OSTI]

    Cheng, Haifei

    2010-01-01T23:59:59.000Z

    Inertial Sensor Based Drive Trains Control by Haifei Cheng AInertial Sensor Based Drive Trains Control c 2010 by HaifeiInertial Sensor Based Drive Trains Control by Haifei Cheng

  14. IEEE SENSORS JOURNAL, SELECTED PAPER FROM IEEE SENSORS 2012 CONFERENCE SPECIAL ISSUE, JULY 2013 1 Ambient-RF-Energy-Harvesting Sensor Device with

    E-Print Network [OSTI]

    Tentzeris, Manos

    , Wireless Sensor Networks I. INTRODUCTION Energy harvesting devices such as solar panels, piezoelectricIEEE SENSORS JOURNAL, SELECTED PAPER FROM IEEE SENSORS 2012 CONFERENCE SPECIAL ISSUE, JULY 2013 1 Ambient-RF-Energy-Harvesting Sensor Device with Capacitor-Leakage-Aware Duty Cycle Control Ryo Shigeta

  15. Photogrammetry & Machine Vision 1. Image sensors

    E-Print Network [OSTI]

    Giger, Christine

    Photogrammetry & Machine Vision 1. Image sensors (a) Fundamentals of image sensors (b) CCD image'Apuzzo Photogrammetry and Machine Vision - 3 Point cloud processing, surface generation, texturing (b) Camera, noise) 2N. D'Apuzzo Photogrammetry and Machine Vision - 3 Point cloud processing, surface generation

  16. Photogrammetry & Machine Vision 1. Image sensors

    E-Print Network [OSTI]

    Giger, Christine

    Photogrammetry & Machine Vision 1. Image sensors (a) Fundamentals of image sensors (b) CCD image. Remondino, N. D'Apuzzo Photogrammetry and Machine Vision ­ 1. Measurement in images (b) Camera calibration of Photogrammetry and Machine Vision Fully understand: 1. Image based 3D and 4D measurement 2. Image based 3D

  17. Photogrammetry & Machine Vision 1. Image sensors

    E-Print Network [OSTI]

    Giger, Christine

    Photogrammetry & Machine Vision 1. Image sensors (a) Fundamentals of image sensors (b) CCD image. Remondino, N. D'Apuzzo Photogrammetry and Machine Vision ­ 2. Camera calibration and orientation (b) Camera and Machine Vision ­ 2. Camera calibration and orientation (b) Calibration methods (reference object, point

  18. WIRELESS SENSORS EMBEDDED IN CONCRETE Amal Abbadi

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    WIRELESS SENSORS EMBEDDED IN CONCRETE Amal Abbadi 1 Phd Student, IRCICA, IEMN, Université Lille1 antennas with concrete are investigated at 860MHz. Simulations for different cases (different concrete are presented. KEYWORDS : Wireless sensor networks, concrete attenuation, embedded antenna, concrete

  19. Modeling Spatially Correlated Data in Sensor Networks

    E-Print Network [OSTI]

    Modeling Spatially Correlated Data in Sensor Networks APOORVA JINDAL and KONSTANTINOS PSOUNIS of spatially correlated sensor network data. The proposed model is Markovian in nature and can capture on the degree of spatial correlation in data, under real and synthetic traces. The real traces are obtained from

  20. Characterization monitoring & sensor technology crosscutting program

    SciTech Connect (OSTI)

    NONE

    1996-08-01T23:59:59.000Z

    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).

  1. Optimize Storage Placement in Sensor Networks

    E-Print Network [OSTI]

    Li, Qun

    of limited storage, communication capacity, and battery power is ameliorated. Placing storage nodesOptimize Storage Placement in Sensor Networks Bo Sheng, Member, IEEE, Qun Li, Member, IEEE, and Weizhen Mao Abstract--Data storage has become an important issue in sensor networks as a large amount

  2. Ultra-wideband radar sensors and networks

    DOE Patents [OSTI]

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

    2013-08-06T23:59:59.000Z

    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.

  3. Carbon Nanotube DNA Sensor and Sensing Mechanism

    E-Print Network [OSTI]

    Le Roy, Robert J.

    Carbon Nanotube DNA Sensor and Sensing Mechanism Xiaowu Tang,*,, Sarunya Bansaruntip, Nozomi; Revised Manuscript Received June 7, 2006 ABSTRACT We report the fabrication of single-walled carbon nanotube (SWNT) DNA sensors and the sensing mechanism. The simple and generic protocol for label

  4. CARBON NANOTUBE TRANSISTORS, SENSORS, AND A Dissertation

    E-Print Network [OSTI]

    McEuen, Paul L.

    CARBON NANOTUBE TRANSISTORS, SENSORS, AND BEYOND A Dissertation Presented to the Faculty of Philosophy by Xinjian Zhou January 2008 #12;#12;CARBON NANOTUBE TRANSISTORS, SENSORS, AND BEYOND Xinjian Zhou, Ph. D. Cornell University 2008 Carbon nanotubes are tiny hollow cylinders, made from a single

  5. Information Capacity of Energy Harvesting Sensor Nodes

    E-Print Network [OSTI]

    Sharma, Vinod

    Information Capacity of Energy Harvesting Sensor Nodes R Rajesh CABS, DRDO Bangalore, India Email: rajesh81r@gmail.com Vinod Sharma Dept. of ECE Indian Institute of Science Bangalore, India Email: vinod Email: pramodv@uiuc.edu Abstract--Sensor nodes with energy harvesting sources are gaining popularity due

  6. Sensor device and methods for using same

    DOE Patents [OSTI]

    Rothgeb, Timothy Michael; Gansle, Kristina Marie; Joyce, Jonathan Livingsto; Jordan, James Madison; Rohwer, Tedd Addison; Lockhart, Randal Ray; Smith, Christopher Lawrence; Trinh, Toan; Cipollone, Mark Gary

    2005-10-25T23:59:59.000Z

    A sensor device and method of employment is provided. More specifically, a sensor device adapted to detect, identify and/or measure a chemical and/or physical characteristic upon placement of the device into an environment, especially a liquid medium for which monitoring is sought is provided.

  7. AIAA-98-0401 BROADBAND INFRARED SENSOR

    E-Print Network [OSTI]

    Seitzman, Jerry M.

    uniformity in the exit plane of a high pressure gas turbine combustor is presented. The sensor, intended with a relatively broadband light source. Performance of the sensor was simulated using a computer model based For improved efficiency, aircraft turbine engine designs call for progressively higher compressor pressure

  8. Integrated Lateral Flow Test Strip with Electrochemical Sensor...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Lateral Flow Test Strip with Electrochemical Sensor for Quantification of Phosphorylated Cholinesterase: Biomarker of Integrated Lateral Flow Test Strip with Electrochemical Sensor...

  9. A graphene-based electrochemical sensor for sensitive detection...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    A graphene-based electrochemical sensor for sensitive detection of paracetamol . A graphene-based electrochemical sensor for sensitive detection of paracetamol . Abstract: An...

  10. acoustic wave sensors: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    acoustic wave devices can be used as wireless sensor elements (SAW transponders Zachmann, Gabriel 30 Underwater Acoustic Sensor Networks: Research Challenges CiteSeer...

  11. acoustic wave sensor: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    acoustic wave devices can be used as wireless sensor elements (SAW transponders Zachmann, Gabriel 30 Underwater Acoustic Sensor Networks: Research Challenges CiteSeer...

  12. Self-corrected Sensors Based On Atomic Absorption Spectroscopy...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    corrected Sensors Based On Atomic Absorption Spectroscopy For Atom Flux Measurements In Molecular Beam Epitaxy. Self-corrected Sensors Based On Atomic Absorption Spectroscopy For...

  13. Development of Compact Gaseous Sensors with Internal Reference...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Compact Gaseous Sensors with Internal Reference for Monitoring O2 and NOx in Combustion Environments Development of Compact Gaseous Sensors with Internal Reference for Monitoring...

  14. Nuclear Detection and Sensor Testing Center | Y-12 National Security...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Detection and ... Nuclear Detection and Sensor Testing Center As part of our increased global nuclear nonproliferation efforts, Y-12 commissioned the Nuclear Detection and Sensor...

  15. Electrochemical Sensors for the Detection of Lead and Other Toxic...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sensors for the Detection of Lead and Other Toxic Heavy Metals: The Next Generation of Personal Exposure Electrochemical Sensors for the Detection of Lead and Other Toxic Heavy...

  16. Glow Plug Integrated Piezo-Ceramic Combustion Sensor for Diesel...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Glow Plug Integrated Piezo-Ceramic Combustion Sensor for Diesel Engines Glow Plug Integrated Piezo-Ceramic Combustion Sensor for Diesel Engines 2005 Diesel Engine Emissions...

  17. A graphene-based electrochemical sensor for sensitive detection...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    graphene-based electrochemical sensor for sensitive detection of paracetamol . A graphene-based electrochemical sensor for sensitive detection of paracetamol . Abstract: An...

  18. Energy Systems Sensor Laboratory (Fact Sheet), NREL (National...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    from fundamental research to applications engineering. Partners at the ESIF's Energy Systems Sensor Laboratory may include: * Hydrogen sensor manufacturers * Codes and standards...

  19. Test Beam Results of 3D Silicon Pixel Sensors for the ATLAS upgrade

    SciTech Connect (OSTI)

    Grenier, P.; /SLAC; Alimonti, G.; /INFN, Milan; Barbero, M.; /Bonn U.; Bates, R.; /Glasgow U.; Bolle, E.; /Oslo U.; Borri, M.; /Manchester U.; Boscardin, M.; /Fond. Bruno Kessler, Povo; Buttar, C.; /Glasgow U.; Capua, M.; /Calabria U. /INFN, Cosenza; Cavalli-Sforza, M.; /Barcelona, IFAE; Cobal, M.; /Udine U. /INFN, Udine; Cristofoli, A.; /Udine U. /INFN, Udine; Dalla Betta, G.F.; /Trento U. /INFN, Trento; Darbo, G.; /INFN, Genoa; Da Via, C.; /Manchester U.; Devetak, E.; /SUNY, Stony Brook; DeWilde, B.; /SUNY, Stony Brook; Di Girolamo, B.; /CERN; Dobos, D.; /CERN; Einsweiler, K.; /LBL, Berkeley; Esseni, D.; /Udine U. /INFN, Udine /Calabria U. /INFN, Cosenza /Barcelona, Inst. Microelectron. /Manchester U. /CERN /LBL, Berkeley /INFN, Genoa /INFN, Genoa /Udine U. /INFN, Udine /Oslo U. /ICREA, Barcelona /Barcelona, IFAE /SINTEF, Oslo /SINTEF, Oslo /SLAC /SLAC /Bergen U. /New Mexico U. /Bonn U. /SLAC /Freiburg U. /VTT Electronics, Espoo /Bonn U. /SLAC /Freiburg U. /SLAC /SINTEF, Oslo /Manchester U. /Barcelona, IFAE /Bonn U. /Bonn U. /CERN /Manchester U. /SINTEF, Oslo /Barcelona, Inst. Microelectron. /Calabria U. /INFN, Cosenza /Udine U. /INFN, Udine /Manchester U. /VTT Electronics, Espoo /Glasgow U. /Barcelona, IFAE /Udine U. /INFN, Udine /Hawaii U. /Freiburg U. /Manchester U. /Barcelona, Inst. Microelectron. /CERN /Fond. Bruno Kessler, Povo /Prague, Tech. U. /Trento U. /INFN, Trento /CERN /Oslo U. /Fond. Bruno Kessler, Povo /INFN, Genoa /INFN, Genoa /Bergen U. /New Mexico U. /Udine U. /INFN, Udine /SLAC /Oslo U. /Prague, Tech. U. /Oslo U. /Bergen U. /SUNY, Stony Brook /SLAC /Calabria U. /INFN, Cosenza /Manchester U. /Bonn U. /SUNY, Stony Brook /Manchester U. /Bonn U. /SLAC /Fond. Bruno Kessler, Povo

    2011-08-19T23:59:59.000Z

    Results on beam tests of 3D silicon pixel sensors aimed at the ATLAS Insertable-B-Layer and High Luminosity LHC (HL-LHC) upgrades are presented. Measurements include charge collection, tracking efficiency and charge sharing between pixel cells, as a function of track incident angle, and were performed with and without a 1.6 T magnetic field oriented as the ATLAS Inner Detector solenoid field. Sensors were bump bonded to the front-end chip currently used in the ATLAS pixel detector. Full 3D sensors, with electrodes penetrating through the entire wafer thickness and active edge, and double-sided 3D sensors with partially overlapping bias and read-out electrodes were tested and showed comparable performance. Full and partial 3D pixel detectors have been tested, with and without a 1.6T magnetic field, in high energy pion beams at the CERN SPS North Area in 2009. Sensors characteristics have been measured as a function of the beam incident angle and compared to a regular planar pixel device. Overall full and partial 3D devices have similar behavior. Magnetic field has no sizeable effect on 3D performances. Due to electrode inefficiency 3D devices exhibit some loss of tracking efficiency for normal incident tracks but recover full efficiency with tilted tracks. As expected due to the electric field configuration 3D sensors have little charge sharing between cells.

  20. Digital Sensors Digital ports range from dgtl1 to dgtl12.

    E-Print Network [OSTI]

    Beer, Randall D.

    Digital Sensors Digital ports range from dgtl1 to dgtl12. Bumper or limit switch: (to be placed at the top of the program) #pragma config(Sensor, dgtl1, touchSensor, sensorTouch) (in the body of the program) int sensor_value; sensor_value = SensorValue(touchSensor); Bumper and Limit Switch