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conference on Penetrating Radiation Systems and applications III

作者： Parnham, K Grosholz, J Davis, RK Vydrin, S Cupec, CA II VI Inc Ev Prod Saxonburg PA 16056 USA

ISBN: (纸本)0819442224

The interest in the use of CdZnTe room-temperature, solid-state detectors for Nuclear Medicine applications continues to grow. Efforts are underway at several companies and institutes to develop CdZnTe detector systems to compete with existing scintillator-based Large Field of View (LFOV) gamma cameras. eV PRODUCTS is focusing on the development of Small Field of View (SFOV) gamma cameras using monolithic CdZnTe detector arrays coupled to custom designed, low noise analog read-out electronics. Electronic noise in the ASIC's has been minimized, and is typically less than 100 e rms (OpF). The detector readout system has the capability to perform automatic energy calibration, gain setting and discrimator level setting, along with a comprehensive self-diagnostic routine. The complete integrated unit includes a bias voltage generator, counters and communication control. A first prototype 256-channel device has been developed and constructed, with pixel dimensions of 1.8 x 1.8 mm(2), on a 34 x 34 x 5mm3 monolithic CdZnTe detector. Results obtained from this system will be presented, showing both the energy resolution and uniformity data for several arrays. The energy resolution has been demonstrated to be 3-5% FWHM @ 140 keV, with photopeak efficiencies of 70-80%.

关键词： CdZnTe small field of view gamma camera ASIC energy resolution photopeak efficiency

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Wireless sensor Networking in the Internet of Things and Cloud Computing Era 28

Wireless Sensor Networking in the Internet of Things and Clo...

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28th European conference on solid-state Transducers (EUROsensorS)

作者： Flammini, A. Sisinni, E. Univ Brescia Dept Informat Engn Via Branze 38 I-25123 Brescia Italy

In the recent past we have observed many technological revolutions, including the transition from the analog world into its digital counterpart and from centralized wired solutions to distributed and pervasive wireless systems. In particular, the advent of low-cost and low-power transceivers, together with the development of compact-size and open standard stacks, have made possible Wireless sensor Networks (WSNs), largely adopted for both home/office and industrial monitoring applications. The nowadays ambitious goal is to sample, collect and analyze every piece of information around us, in order to improve production efficiency and ensure optimal resource consumption. The "Internet of Things" (IoT), i.e. the capability of connecting every possible device to the World Wide Web, is the practical answer to this request. The very large amount of information that is consequently generated could be profitably handled using "cloud" services, i.e. flexible and powerful hardware/software frameworks capable to deliver computing as a service. The aim of this work is to resume pros and cons of well-accepted WSN technologies, suggesting their possible extension towards already available cloud services. (C) 2014 The Authors. Published by Elsevier Ltd.

关键词： wireless sensor networks real-time communication low power consumption

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Deep Fusion of a Skewed Redundant Magnetic and Inertial sensor for Heading state Estimation in a Saturated Indoor Environment

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INTERNATIONAL JOURNAL OF SEMANTIC COMPUTING 2021年第3期15卷 313-335页

作者： Karimi, Mojtaba Babaians, Edwin Oelsch, Martin Steinbach, Eckehard Tech Univ Munich Dept Elect & Comp Engn D-80333 Munich Germany

Robust attitude and heading estimation in an indoor environment with respect to a known reference are essential components for various robotic applications. Affordable Attitude and Heading Reference Systems (AHRS) are typically using low-cost solid-state MEMS-based sensors. The precision of heading estimation on such a system is typically degraded due to the encountered drift from the gyro measurements and distortions of the Earth's magnetic field sensing. This paper presents a novel approach for robust indoor heading estimation based on skewed redundant inertial and magnetic sensors. Recurrent Neural Network-based (RNN) fusion is used to perform robust heading estimation with the ability to compensate for the external magnetic field anomalies. We use our previously described correlation-based filter model for preprocessing the data and for empowering perturbation mitigation. Our experimental results show that the proposed scheme is able to successfully mitigate the anomalies in the saturated indoor environment and achieve a Root-Mean-Square Error of less than 2.5 degrees for long-term use.

关键词： Heading estimation skewed redundant RNN magnetic and inertial sensor

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New highly-efficient laser bars and laser arrays for 8xx-10xx nm pumping applications

New highly-efficient laser bars and laser arrays for 8xx-10x...

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conference on High-Power Diode Laser Technology and applications XII

作者： Pietrzak, A. Huelsewede, R. Zorn, M. Hirsekorn, O. Sebastian, J. Meusel, J. Bluemel, V. Hennig, P. JENOPTIK Diode Lab GmbH Max Planck Str 2 D-12489 Berlin Germany JENOPTIK Laser GmbH D-07745 Jena Germany

ISBN: (纸本)9780819498786

High-power laser bars and laser arrays are attractive light sources for many industrial applications such as direct material processing or as pump sources for solid state and fiber lasers. There is also a great interest in quasi-CW laser bars for laser ignition and fusion applications. These applications require a continuous improvement of laser diodes for reliable operation at high output powers densities and simultaneously high electrical-to-optical efficiencies. JENOPTIK presents an overview of recent progress in the development of highly efficient CW and quasi-CW laser devices emitting in a wide wavelength range between 880 nm and 1020 nm. Laser arrays emitting in the wavelength range 915 nm to 976 nm exhibit very high efficiencies above 65%. Our technology of new generation 940 nm high fill-factor bars has been currently extended to emission wavelength of 1020 nm with excellent results: 200 W output power with 63% efficiency using passively cooled heatsinks. Additionally, performances of high brightness low fill-factor laser bars with resonator lengths of 4 mm are shown. The innovative design of the laser structure enables, moreover, the realization of 500 W - 880 nm quasi-CW laser bars with wall-plug efficiencies of 55% and a narrow fast-axis divergence angle of 40 degrees (95% power content).

关键词： laser diode laser array laser bar high-power high-efficiency 1020 nm 940 nm reliability

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Direct field sensor. A mature solid state metering technology

Direct field sensor. A mature solid state metering technolog...

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Sixth International conference on Metering Apparatus and Tariffs for Electricity Supply

作者： Hannah, N.R. Pollock, M.R. Ltd United Kingdom

Ferraris metering elements were widely applicable to the whole range of prevailing market needs, whether for simple single-rate domestic devices or for the most complex polyphase devices with capabilities for reactive energy measurement and impulsing outputs. Until recently, no solid-state technology was able to offer the same universal flexibility, but a breakthrough in the development of a Hall-effect based transducer has changed the picture completely. The new technology is known as Vertical Hall and it overcomes the hitherto practical difficulties, namely temperature, linearity and offset problems, which have excluded it from metering applications in the past. As is described these new Vertical Hall based devices show exceptional performance.

关键词： Hall Effect Transducers

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A novel flip-chipped integrated single photon detection platform for proteomics

A novel flip-chipped integrated single photon detection plat...

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conference on Optics and Photonics Technologies and applications

作者： Jackson, JC West, J Moloney, AM O'Connell, D Morrison, AP Mathewson, A Natl Univ Ireland Univ Coll Cork NMRC Cork Ireland

ISBN: (纸本)0819446572

Novel integrated sensors will be-required for future detection platforms for the measurement of fluorescence and luminescence. The current trend towards integration of optical detectors and the broad advances in optical emitting dyes and proteins will be combined in robust;low-cost, point-of-use, diagnostic equipment. To this end we are experimenting with an integrated optical hybrid sensing device which will combine a flip-chipped, array of solid-state single photon counting detectors with surface mount passive quench circuits on a conventional glass substrate. This flip-chipped arrangement both 1) increases the speed of response of the detector and 2) increases the robustness and ease.-of integration and reduces single photon detector handling requirements. The potential of integrated solid-state photon detectors will be demonstrated for the real-time quantitative detection of luciferase, a light. emitting protein expression reporter molecule. A 15[cm solid-state Geiger-mode avalanche photodiode (APD) operating in single photon counting mode will be compared with a standard photomultiplier tube (PMT) for luciferase luminescence detection. Detection levels of 2 x 10(6) and 1 x 10(7) enzyme molecules will be demonstrated for PMT and Geiger-mode APD respectively. The size of the Geiger-mode APD active area will be shown to be the limiting factor in luciferase signal detection for non-integrated applications. A simple geometric model will show hat detection limits of 1 x 10(4) are achievable in integrated sensing platforms using room temperature operated single photon counting detectors.

关键词： Geiger-mode APD avalanche photodiode GM-APD APD pn diode flip-chip detector arrays proteomics genomics

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2010 IEEE Asian solid-state Circuits conference, A-SSCC 2010

2010 IEEE Asian Solid-State Circuits Conference, A-SSCC 2010

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2010 6th IEEE Asian solid-state Circuits conference, A-SSCC 2010

ISBN: (纸本)9781424482979

The proceedings contain 97 papers. The topics discussed include: future television - super hi-vision and beyond;asymmetric cross-coupled sense amplifier for small-sized 0.5-V gigabit-DRAM arrays;a 28 nm dual-port SRAM macro with screening circuitry against write-read disturb failure;a multi-mode digital controller with windowed ADC and self-calibrated DPWM for slew-enhanced switching converter;a 1-V input, 0.2-V to 0.47-V output switched-capacitor DC-DC converter with pulse density and width modulation (PDWM) for 57% ripple reduction;an ultra-low-cost RFID tag with 1.67 Gbps data rate by ink-jet printing on paper substrate;low noise capacitive sensor for multi-touch mobile handset's applications;a 31mA CMOS wideband BD-II B2&B3 mode receiver with 55dB gain dynamic range;a high-speed, on-chip implementation of Teager Kaiser operator for in-band interference rejection;a 40-GHz phase-locked loop for 60-GHz sliding-IF transceivers in 65nm CMOS;and a 0.45V-to-2.7V inductive-coupling level shifter.

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A flexible tactile sensing array based on novel capacitance mechanism

A flexible tactile sensing array based on novel capacitance ...

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TRANSDUCERS 2009 - 15th International conference on solid-state sensors, Actuators and Microsystems

作者： Cheng, Ming-Yuan Liao, B.-T. Huang, X.-H. Yang, Y.-J. Department of Mechanical Engineering National Taiwan University Taipei Taiwan

ISBN: (纸本)9781424441938

In this work, we present the development of a reliable capacitive tactile sensing array by using simple fabrication processes. The sensing array, which consists of a micromachined PDMS structure and a flexible printed circuit board with sensing electrodes, will be mainly used as the artificial skin for robot applications. The proposed design can effectively reduce the complexity of the capacitor structure of each sensing element without compromise in sensitivity. The electrical properties of different size of tactile sensing elements are measured. The corresponding scanning circuit is also implemented. The tactile images induced by the PMMA stamps of different shapes have been successfully captured. ©2009 IEEE.

关键词： Robot applications

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Thin-film electro-acoustic sensors based on AlN and its alloys: possibilities and limitations

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MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS 2012年第7-8期18卷 1213-1223页

作者： Wingqvist, Gunilla Linkoping Univ Dept Phys Chem & Biol IFM S-58383 Linkoping Sweden

Sputter deposited aluminum nitride (AlN) thin films have played a central role for the successful development of the thin film electro-acoustic technology. The development has been primarily driven by one device-the thin film bulk acoustic resonator, with its primary use for high frequency filter applications for the telecom industry. Recently, increased piezoelectric properties in AlN through the alloying with scandium nitride have been identified both experimentally and theoretically. This opens up new possibilities for the thin film electro-acoustic technology. Here expectations and discussions are presented on acoustic FBAR sensor performance when based on AlN as well as on such AlN alloys to identify possible benefits and limitations. Inhere, the distinction is made between direct and in-direct (acoustic) use of the piezoelectric effect for sensor applications. These two approaches are described and compared in view of their advantages and possibilities. Especially, the indirect (or acoustic) use is identified as interesting for its versatility and good exploitation of the thin film technology to obtain highly sensitive sensor transducers. It is pointed out that the indirect approach can well be obtained internally in the piezoelectric material structure. Original calculations are presented to support the discussion.

关键词： THIN film devices THIN films DETECTORS ALLOYS ALUMINUM nitride solid state electronics

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Designing chemically selective microsensor arrays using ionic liquid doped ionomers

Designing chemically selective microsensor arrays using ioni...

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12th IEEE sensorS 2013 conference

作者： Min, Hwall Hatipoglu, Gokhan Tadigadapa, Srinivas Department of Electrical Engineering Pennsylvania State University University Park PA United States

ISBN: (纸本)9781467346405

development of techniques for designing microsensor arrays with high sensitivity and selectivity has been a continuing challenge in the field of chemical sensing. Typically, sensitivity defines the detection limit, the identification and differentiation of the various components in the gas mixtures is accomplished by the pattern of response, i.e. selectivity of the sensor array. In this study, the performance of four distinctly functionalized resonator-pixels is explored to show the capability of room temperature ionic liquids (RTILs) as selective sorbent materials in designing microsensor arrays for the application of chemical detection and gas discrimination. The response of multi-pixel resonator array functionalized with a single solid ionomer matrix, DPA-PS:BP, but doped with various RTILs is used to obtain frequency and Q-factor responses upon exposure to multianalyte volatile organic compounds and its mixtures. The responses generated from the carefully selected RTIL-doped ionomer is then used to explore the uniqueness of the responses which can be used in the determination of components in organic vapor mixtures. For better discrimination of gas mixtures, the uniqueness of sensor response to analytes is utmost important factor to be considered. This paper presents the results on the integration of RTIL-doped ionomer system for discrimination of gases and vapors. © 2013 IEEE.

关键词： Design

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