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11th IEEE Annual Biomedical Circuits and Systems Conference (BioCAS)

作者： Tang, Chen-Ting Huang, Cheng-Ming Tang, Kea-Tiong Chen, Hsin Natl Tsing Hua Univ Dept Elect Engn Hsinchu 30013 Taiwan

ISBN: (纸本)9781479972340

The electronic nose (eNose) mimicking the mammalian olfactory system has each sensor respond to different odours to different extents. However, the real environment contains multiple odours interacting with each other, such that the sensory signals of an eNose exhibit high variability and the responses to different odours usually overlap with each other. This paper presents the development of a scalable and adaptable probabilistic model for recognising eNose signals and realising the model as customer- designed integrated circuits. The scalability refers to interconnecting multiple chips to form a large network of probabilistic model for processing high-dimensional sensory signals, or to form a multi-expert system that is able to estimate the likelihood of belonging to different types of odours. The latter case could provide extra information for clinical diagnosis. Furthermore, on-chip adaptability is incorporated to learn new data distribution or variability in real time. By integrating the adaptable probabilistic model with eNose sensor arrays, analog-to-digital converters, and a digital processor on a single chip, an intelligent eNose microsystem will be formed for a variety of biomedical applications.

关键词： probabilistic models recognising eNose signals scalable architecture on-chip learning ability

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A general approach to one-step fabrication of single-piece nanocomposite membrane based Pb²⁺-selective electrodes

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sensorS AND ACTUATORS B-CHEMICAL 2019年 281卷 705-712页

作者： Liu, Yueling Liu, Yang Gao, Yingying Wang, Ping East China Univ Sci & Technol Sch Biotechnol Biomed Nanotechnol Ctr State Key Lab Bioreactor Engn Shanghai 200237 Peoples R China

A simple and general approach leading to well-dispersed and surfactant-free multi-walled carbon nanotubes (MWCNT) based single-piece Pb(2+-)selective nanocomposite membrane is proposed. The single-piece solid-contact Pb2+-selective electrodes were prepared via one-step drop casting the ultrasonicated suspension mixture on the golden electrodes. The obtained electrodes exhibited a Nernstian response slope of 29.0 +/- 0.2 mV/decade in the linear range from 2.0 x 10(-3) to 2.0 x 10(-9) M and a low detection limit of 4.0 x 10(-10) M. Due to the inherent high capacitance and hydrophobicity of nanocomposite membrane, excellent long-term potential stability and absence of water films were observed. Moreover, the sensor showed good resistance to interfering agents such as redox couple, light and gases. In addition, the proposed electrodes were demonstrated to be feasible for Pb2+ determination in tap water. Overall it was demonstrated as an appealing sensor for lead (ii) detection for environmental and clinical applications.

关键词： Single-piece Nanocomposite Multi-walled carbon nanotubes Lead Ion selective electrode

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Cobalt-Embedded N-Doped Carbon Nanostructures for Oxygen Reduction and Supercapacitor applications

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ACS APPLIED NANO MATERIALS 2020年第7期3卷 6354-6366页

作者： Devi, Bandhana Jain, Anuj Roy, Biswajit Rao, Bhaskara R. Tummuru, N. R. Halder, Aditi Koner, Rik Rani Indian Inst Technol Mandi Sch Basic Sci Kamand 175005 Himachal Prades India Indian Inst Technol Mandi Sch Engn Kamand 175005 Himachal Prades India Indian Inst Technol Mandi Sch Comp & Elect Engn Kamand 175005 Himachal Prades India

Metal-organic framework (MOF)-derived nanostructures are portraying a major confront to the quest for high-performing electrocatalysts for energy conversion and storage devices largely because of their tunable synthesis, high surface area, and presence of various heteroatoms depending upon the choice of ligands used as precursors. In this regard, multifunctional electrode material development with high performance is a contemporary trend. We report an innovative integrated nanostructure of Co-NC3 (Co-MOF annealed at 700 degrees C for 3 h under Ar) bestowed with admirable potential, derived from a newly designed Co(ii)-based MOF comprising benzene-1,3,5-tricarboxylic acid and 1,10-phenanthroline. The Co-NC3 nanostructure derived from Co-MOF was found to be a highly efficient catalyst for the oxygen reduction reaction with onset potential (0.90 V vs RHE) and half-wave potential (0.81 V vs RHE) comparable to those for the commercial 20 wt % Pt/C catalyst (0.91 and 0.83 V vs RHE). Next, the same catalyst was explored as a commendable energy-storage material for supercapacitors with a specific capacitance value of 310 F/g at a 0.5 A/g current density. We fabricated a solid-state asymmetric supercapacitor device from Co-NC3 and lit light-emitting diodes of 1.8 V each using three such supercapacitors in series. For the first time, a Co-MOF-derived supercapacitor was deployed successfully in a solar photovoltaic-based sensor node system.

关键词： metal-organic framework electrocatalyst oxygen reduction reaction durability supercapacitor PV based sensor

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Antenna-coupled microbolometers for multi-spectral infrared imaging

Antenna-coupled microbolometers for multi-spectral infrared ...

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32nd Conference on Infrared Technology and applications

作者： Weling, Aniruddha S. Henning, Patrick F. Neikirk, Dean P. Han, Sangwook Foster Miller Inc 195 Bear Hill Rd Waltham MA 02451 USA Univ Texas Austin Dept Elect & Comp Engn Austin TX 78712 USA

ISBN: (纸本)0819462624

Although the rapid development of 2-D focal plane arrays of thermal infrared (IR) detectors has led to remarkable progress in uncooled IR imaging technology, a major limitation of these sensors is the lack of true on-chip spectral discrimination. Multi-spectral detection capabilities enable rapid, efficient and multi-dimensional scene interpretation that is especially beneficial to advanced IR imaging systems for early threat warning and target recognition applications. We propose a novel design for a monolithic micromachined array of bolometric detectors capable of multi-spectral imaging in the long-wave IR (7-14 mu m) region. The central ingredient of this approach is to employ planar multi-mode antenna structures to efficiently couple incident electromagnetic radiation to a microbolometeric sensing element that is much smaller than the IR wavelength. The wavelength selectivity of such an antenna-coupled detector can be tuned by optimizing its multiple geometric parameters. We present a planar microbolometer design that can accomplish 3-color LWIR imaging with no moving parts analogous to solid-state color videography in the visible region. The proposed effort targets applications of uncooled color IR imaging where the benefits in space, power, weight and complexity will have a significant impact.

关键词： infrared imaging multi-spectral thermal detector microbolometer array FPA sensor

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High-resolution 3D imaging laser radar flight test experiments

High-resolution 3D imaging laser radar flight test experimen...

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Conference on Laser Radar Technology and applications X

作者： Marino, RM Davis, WR Rich, GC McLaughlin, JL Lee, EI Stanley, BM Burnside, JW Rowe, GS Hatch, RE Square, TE Skelly, LJ O'Brien, M Vasile, A Heinrichs, RM MIT Lincoln Lab Lexington MA 02420 USA

ISBN: (纸本)0819457760

Situation awareness and accurate Target Identification (TID) are critical requirements for successful battle management. Ground vehicles can be detected, tracked, and in some cases imaged using airborne or space-borne microwave radar. Obscurants such as camouflage net and/or tree canopy foliage can degrade the performance of such radars. Foliage can be penetrated with long wavelength microwave radar, but generally at the expense of imaging resolution. The goals of the DARPA Jigsaw program include the development and demonstration of high-resolution 3-D imaging laser radar (ladar) sensor technology and systems that can be used from airborne platforms to image and identify military ground vehicles that may be hiding under camouflage or foliage such as tree canopy. With DARPA support, MIT Lincoln Laboratory has developed a rugged and compact 3-D imaging ladar system that has successfully demonstrated the feasibility and utility of this application. The sensor system has been integrated into a UH-1 helicopter for winter and summer flight campaigns. The sensor operates day or night and produces high-resolution 3-D spatial images using short laser pulses and a focal plane array of Geiger-mode avalanche photo-diode (APD) detectors with independent digital time-of-flight counting circuits at each pixel. The sensor technology includes Lincoln Laboratory developments of the microchip laser and novel focal plane arrays. The microchip laser is a passively Q-switched solid-state frequency-doubled Nd:YAG laser transmitting short laser pulses (300 ps FWHM) at 16 kilohertz pulse rate and at 532 nm wavelength. The single photon detection efficiency has been measured to be > 20% using these 3202 Silicon Geiger-mode APDs at room temperature. The APD saturates while providing a gain of typically > 106. The pulse out of the detector is used to stop a 500 MHz digital clock register integrated within the focal-plane array at each pixel. Using the detector in this binary response mode simp

关键词： sensors LIDAR 3D image processing Camouflage Pulsed laser operation Staring arrays Stereoscopy Imaging systems 3D acquisition Avalanche photodetectors

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development of robust self-assembled microvalves for robust hydraulic actuators

Development of robust self-assembled microvalves for robust ...

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Conference on MEMS/MOEMS Components and Their applications ii

作者： Li, B Gerace, S Chen, QF Univ Cent Florida MEMS Orlando FL 32816 USA

ISBN: (纸本)0819456918

Compact robust hydraulic actuators are very important for space related applications because of their capability of producing much larger forces per unite volume/mass than existing technologies. The major components of these actuators are PZT stacks (pusher) and microvalves. The PZT pusher works at high frequencies to produce large flow rates (proportional to displacement traveled) and high pressures. As a component of the hydraulic actuator, the microvalves are challenged in matching the requirements of the PZT in terms of high operational frequencies, large flow rates and high-pressure support capabilities. In order to fulfill these requirements, the authors have developed robust self-assembled solid nickel micro valve arrays consisting of 80 single micro check valves, to achieve the required flow rate (> 10 cc/second). A single micro check valve consists of an inlet channel (200 mu m in diameter), a specially designed valve flap held by four identical micro beams, and outlet channels. All these structures are made from electroformed nickel and are self-assembled during a novel in situ UV-LIGA fabrication process. Finite element simulation results show that the micro check valve has a 1(st) resonant frequency of 16 kHz and is able to support pressures greater than 10 MPa. Test results show the flow rate is 19 cc/s at a pressure difference of 100 psi, and is roughly proportional to the pressure applied. Based on Poiseuille's law, it is reasonable to predict larger flow rates if higher-pressure differences are applied.

关键词： microvalve hydraulic actuators large flow rate high pressure high frequency UV-LIGA self-assemble

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Heteroepitaxial growth of 3C-SiC on SOI for sensor applications

Heteroepitaxial growth of 3C-SiC on SOI for sensor applicati...

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2nd European Conference on Silicon Carbide and Related Materials (ECSCRM 98)

作者： Krötz, G Möller, H Eickhoff, M Zappe, S Ziermann, R Obermeier, E Stoemenos, J Daimler Benz AG Dept FT2M D-81663 Munich Germany Tech Univ Berlin Berlin Germany Aristotelian Univ Salonika GR-54006 Salonika Greece

Typical industrial high temperature sensor applications are reviewed and a short overview of the different high temperature sensor technologies is given. The pros and cons are weighted. Silicon carbide on insulator (SiCOIN) technology comes out to be the most attractive, provided the state of development can be brought up to the one of silicon and silicon on insulator (SOT). Due to the lack of commercially available SIC on SOI wafers, a new SiC on SOI technology has been developed. It is based on the precursor gas methylsilane. The low temperature growth process is described and in-situ n-type doping, which is necessary for sensor applications, has been carried out successfully over a wide range of concentrations without loosing the good crystal properties. Actually the full process is being transferred from a test reactor to a 4 inch machine. This should provide 3C-SiC on SOI wafers for commercial sensor applications. A demonstrator of combustion pressure sensor dedicated to pressure-based engine control is shown. Results of the pressure sensor fitted in a motor-test setup are summarized. (C) 1999 Elsevier Science S.A. All rights reserved.

关键词： Semiconducting silicon compounds

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First assessments into the use of commercial-grade solid state lidar for low cost heritage documentation 24

First assessments into the use of commercial-grade solid sta...

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2021 24th ISPRS Congress Commission ii: Imaging Today, Foreseeing Tomorrow

作者： Murtiyoso, A. Grussenmeyer, P. Landes, T. Macher, H. Université de Strasbourg INSA Strasbourg CNRS ICube Laboratory UMR 7357 Photogrammetry and Geomatics Group Strasbourg67000 France

Heritage documentation has benefitted greatly from significant developments in sensor technology during the past two decades. Miniaturisation of sensors is also an important aspect in the development of low cost sensors, always interesting in heritage projects where budgetary constraints are often present. Among these sensors, the solid-state lidar has begun to attract attention, partly due to its integration in Apple Inc.'s latest version of the iPhone and iPad series. We hypothesise that this type of sensor will see a lot of use in the near future;however, the question remains whether they are sufficient for heritage documentation purposes. In this paper, results from the 2020 iPad Pro SSL point cloud will be assessed and compared to more traditional techniques for 3D scanning (photogrammetry and terrestrial laser scanning). While understandably the geometric quality of benchmark-level techniques such as these remain undeniably better, at least for the moment, the paper concludes that SSL sensors may nevertheless be sufficient for some lower-precision applications. © 2021 International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives. All rights reserved.

关键词： Optical radar

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Multiplexed mid-wavelength IR long linear photoconductive focal-plane arrays

Multiplexed mid-wavelength IR long linear photoconductive fo...

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Infrared Imaging Systems: Design, Analysis, Modeling and Testing ii

作者： Kreider, James F. Preis, Mark K. Roberts, Peter C. Owen, Larry D. Scott, Walter M. Walmsley, Charles F. Quin, Alan Litton Electron Devices Div. Tempe AZ USA

ISBN: (纸本)0819405973

This paper discusses the successful demonstration of a first in thermal imaging with utilized an inexpensive midwavelength IR (MWIR) linear, focal plane assembly (FPA) comprising a long linear array of lead selenide (PbSe) photoconductors interfaced to an on-focal-plane multiplexer (MUX). The design of this unique IR sensor consisted of a rugged dewar package in which was mounted a reliable, solid state thermoelectric cooler (TEC) coupled with the proven technologies of both the PbSe fabrication process and the complementary metal-oxide- semiconductor (CMOS) multiplexers. This combination of components now provides the system designer with a readily available, cost-effective, second-generation PbSe focal plane assembly for scanning, thermal imaging applications that require high resolution and system performance of NEΔT capability of better than 0.2°C.

关键词： Infrared Imaging

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CCD controller requirements for ground-based optical astronomy

CCD controller requirements for ground-based optical astrono...

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solid state sensor arrays and CCD Cameras

作者： Leach, Robert W. San Diego State Univ. San Diego CA USA

ISBN: (纸本)081942028X

Astronomical CCD controllers are being called upon to operate a wide variety of CCDs in a range of ground-based astronomical applications. These include operation of several CCDs in the same focal plane (mosaics), simultaneous readout from two or four corners of the same CCD (multiple readout), readout of only a small region or number of regions of a single CCD (sub-image or region of interest readout), continuous readout of devices for drift scan observations, differential imaging for low contrast polarimetric or spectroscopic observations and very fast readout of small devices for wavefront sensing in adaptive optics systems. These applications all require that the controller electronics not contribute significantly to the readout noise of the CCD, that the dynamic range of the CCD by fully sampled (except for wavefront sensors), that the CCD be read out as quickly as possible from one or more readout ports, and that considerably flexibility in readout modes (binning, skipping and signal sampling) and device format exist. A further requirement imposed by some institutions is that a single controller design be used for all their CCD instruments to minimize maintenance and development efforts. A controller design recently upgraded to meet these requirements is reviewed. It uses a sequencer built with a programmable DSP to provide user flexibility combined with fast 16-bit A/D converters on a programmable video processor chain to provide either fast or slow readouts.

关键词： Cameras

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