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conference on Infrared Technology and applications XXXI

作者： Hay, KA Van Deusen, D Infrared Vis Technol Corp Buellton CA 93427 USA

ISBN: (纸本)081945768X

InfraredVision Technology Corporation ("ITC") has improved the performance of the 320x240 microbolometer Uncooled Focal Plane Array ("UFPA") by increasing the pixel fill-factor. This allows state-of-the-art performance for applications requiring high sensitivity. Measurements taken on microbolometer test structures and detector arrays show a factor of two improvements in the responsivity over that previously reported for our standard 37.5-mu m pixel UFPA. Performance results for microbolometer pixels ranging in size from 50 mu m down to 15 mu m are presented. Our ITC-1000 series detector product addresses both imaging and radiometric commercial-camera applications. With the development of a high fill-factor pixel design, ITC will soon provide a high-performance VOx microbolometer-based sensor to camera manufacturers requiring state-of-the-art detector performance. FPA performance is presented to demonstrate the sensor improvements accomplished. The use of our on-chip NonUniformity Correction (NUC) feature, available on the ITC-1000 detector, is characterized to demonstrate the performance limitations.

关键词： UFPA uncooled microbolometer VOx vanadium oxide NonUniformity Correction (NUC)

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A Comparative Study on Using Phased or Timed arrays in Audio Surveillance applications 39

A Comparative Study on Using Phased or Timed Arrays in Audio...

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39th IEEE International conference on Electronics and Nanotechnology (ELNANO)

作者： Ortolani, Francesca Ironbridge Elect Rome Italy

ISBN: (纸本)9781728120652

Array processing techniques are widely used in audio applications, especially in audio surveillance systems, where one of the tasks is the scan of the surroundings and the detection of acoustic sources. The array sensors sample the sound field in space, the same way an analog-to-digital converter samples sound in time. Correspondingly, the Nyquist criterion should be applied in the space domain in order to avoid aliasing artifacts. However, the audio spectrum is wide and reducing the sensor dimensions providing the correct reconstruction for all higher audio frequencies can be problematic. In this paper, we propose a comparative study on the usage of phased array solutions and the timed array counterpart.

关键词： Phased arrays timed arrays spatial aliasing acoustic localization drone detection audio surveillance

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MOEMS pressure sensors for propulsion applications

MOEMS pressure sensors for propulsion applications

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conference on MOEMS and Miniaturized Systems

作者： Boyd, JT Dasgupta, S Jackson, HE Univ Cincinnati Dept Elect & Comp Engn & Comp Sci Cincinnati OH 45221 USA

ISBN: (纸本)0819438340

Pressure sensors utilizing microelectromechanical systems (MEMS) technology for fabrication of the sensing element, interrogation by fiber optics, and which are suitable for propulsion applications are described. Devices utilizing micro-opto-electro-mechanical systems (MOEMS) technology are often better suited for harsh environments than electrical ly interrogated MEMS devices, so with sturdy packaging these optical devices may be useful to many propulsion applications. MOEMS pressure sensors can also be incorporated into arrays for detailed spatial characterization along with inherent high speed temporal characterization. Such characterization is expected to be very useful for propulsion systems. This presentation will first review optical-MEMS pressure sensor configurations. We will then concentrate on configurations most suitable for high speed applications in harsh environments. Examples of experimental results for static pressure tests as well as for dynamic pressure tests carried out in a shock tube demonstrating good linearity, sensitivity and time response will then be presented. Hybrid and monolithic array configurations will be presented. A discussion of the use of wavelength division multiplexing (WDM) for efficient accessing of array elements will also be included.

关键词： fiber-optic micromachined sensor arrays dynamic response Fabry-Perot pressure sensors

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development of Low Cost Rapid Fabrication of Sharp Polymer Microneedles for In Vivo Glucose Biosensing applications

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ECS JOURNAL OF solid state SCIENCE AND TECHNOLOGY 2015年第10期4卷 S3053-S3058页

作者： Barrett, Colm Dawson, Karen O'Mahony, Conor O'Riordan, Alan Natl Univ Ireland Univ Coll Cork Tyndall Natl Inst Cork Ireland

New approaches to enable more effective management of diabetes mellitus, such as continuous glucose monitoring are being developed both to prevent unstable episodes of hypo or hyper glycaemia and also to provide an improved user experience. One emerging approach to realize these requirements is to fabricate a minimally invasive transdermal sensor for the direct in vivo detection of glucose in the interstitial fluid. Microneedles - sharp, microscopic structures measuring less than 1 mm in length - have been previously employed to allow painless penetration of the stratum corneum for delivery of drugs and vaccines. In this work we present, ultra sharp gold coated polymer microneedle arrays (sub micron tip radii) which are fabricated using a low cost polymer replication approach. Critical dimensions of the microneedle arrays are characterized using a combination of optical and scanning electron microscopies. Fabricated microneedle devices are characterized by cyclic voltammetry to explore functionality. The voltammetric detection of glucose is performed using ferrocene monocarboxylic acid as an oxidising mediator in the presence of glucose oxidase. The biosensor can be applied to the quantification of glucose in the physiological range (2 - 13.5 mM). The sensors demonstrate high selectivity towards glucose with negligible interference from other oxidizable species including uric acid, ascorbic acid, mannose, fructose, salicylic acid (Aspirin) and acetaminophen (Paracetamol). This demonstrates potential future use of these microneedle devices for in vivo glucose detection. (C) The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://***/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. F

关键词： Glucose

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Experimental validation of a novel bulk acoustic wave sensor read-out circuit 13

Experimental validation of a novel bulk acoustic wave sensor...

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13th IEEE International conference on solid-state and Integrated-Circuit Technology (ICSICT)

作者： Gao Yang Yin Xi-yang Huang Zhen-hua Lv Jun-guang China Acad Engn Phys Inst Elect Engn Mianyang 621999 Sichuan Peoples R China Southwest Univ Sci & Technol Sch Informat Engn Mianyang 621010 Sichuan Peoples R China Chinese Acad Sci Inst High Energy Phys State Key Lab Particle Detect & Elect Beijing 100049 Peoples R China

ISBN: (纸本)9781467397193

The feasibility of the scheme to realize the novel bulk acoustic wave (BAW) sensor readout circuit has been verified by simulation, but further experimental verification is needed. Using the film bulk acoustic resonator (FBAR) with about 1.5 GHz series resonant frequency as the device under test (DUT), we designed and fabricated microstrip six-port network and detector on PCB which meet the requirements of FBAR resonant frequency measurement bandwidth (1.3 - 1.7 GHz). We obtained the measurement result of the reflection coefficient frequency (F-f) curve of the simulated DUT (50 Omega SMA matched load) by using radio frequency signal generator and oscilloscope. Comparing the measurement results from six-port reflectometer and vector network analyzer (VNA), we found they were quite consistent. We verified through experiment that "the six-port reflectometer- based BAW sensor readout circuit" can be used for the measurement of FBAR resonant frequency. Our research is useful for the practical BAW sensor development and the VNA on a chip (VNA-on-chip) design.

关键词： Estimation Field programmable gate arrays OFDM Modulation Filtration Clocks Signal processing algorithms

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Towards ultra-dense arrays of VHF NEMS with FDSOI-CMOS active pixels for sensing applications

Towards ultra-dense arrays of VHF NEMS with FDSOI-CMOS activ...

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59th International solid-state Circuits conference, ISSCC 2012

作者： Arndt, Gregory Dupré, Cecilia Arcamone, Julien Cibrario, Gérald Rozeau, Olivier Duraffourg, Laurent Ollier, Eric Colinet, Eric CEA-LETI-MINATEC Grenoble France

ISBN: (纸本)9781467303736

Similar to transistors, the size of MEMS components is continuously shrinking, progressing from MicroElectroMechanical Systems to NanoElectroMechanical Systems (NEMS). Indeed, NEMS are emerging as a new field of interest because their submicron dimensions make them converge towards CMOS fabrication processes. They have specific advantages such as fast response time and high detection sensitivity when used as a resonant sensor [1]. From the application point of view, NEMS interact "naturally" with the nanoscale world and can sense unprecedented physical and biological phenomena, such as the mass of a single molecule, the force exerted by living cells or certain biochemical reactions. In the next five to ten years, NEMS should offer a real breakthrough for mass spectrometry or gas analysis applications because they can achieve similar resolution to conventional lab equipment but at a lower cost due to their compatibly with VLSI processes. © 2012 IEEE.

关键词： MEMS

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A dry electrophysiology electrode using CNT arrays

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sensorS AND ACTUATORS A-PHYSICAL 2006年第1期132卷 34-41页

作者： Ruffini, Giulio Dunne, Stephen Farres, Esteve Marco-Pallares, Josep Ray, Chris Mendoza, Ernest Silva, Ravi Grau, Carles Starlab Barcelona SL Ed Observ Fabra Barcelona 08035 Spain Univ Surrey Adv Technol Inst Nanoelect Ctr Guildford GU2 5XH Surrey England Univ Barcelona Neurodyan Lab Psychiat & Clin Psychobiol Dept E-08007 Barcelona Spain

We describe the design of a dry electrode sensor for biopotential measurement applications (ENOBIO) designed to eliminate the noise and inconvenience associated to the use of electrolytic gel. ENOBIO uses nanotechnology to remove gel-related noise, as well as maintaining a good contact impedance to minimise interference noise. The contact surface of the electrode will be covered with an array/forest of carbon nanotubes and will also be tested with an Ag/AgCl coating to provide ionic-electronic transduction. The nanotubes are to penetrate the outer layers of the skin, the Stratum Corneum, improving electrical contact. We discuss requirements, skin properties, nanotube penetration and transduction, noise sources, prototype design logic and biocompatibility. A future paper will report test results. (c) 2006 Elsevier B.V. All rights reserved.

关键词： biopotential electrode carbon nanotubes EEG ECG

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Emulating artificial mechanoreceptor functionalities from SiO₂-based memristor and PDMS stretchable sensor for artificial skin applications 51

Emulating artificial mechanoreceptor functionalities from Si...

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IEEE 51st European solid-state Device Research conference (ESSDERC)

作者： Bousoulas, P. Papakonstantinopoulos, Ch Tsoukalas, D. Natl Tech Univ Athens Dept Appl Phys Heroon Polytech 9 Athens 15780 Greece

ISBN: (纸本)9781665437486

The development of robust artificial sensory systems that will be able to detect, memorize and respond to external stimuli is attracting a considerable amount of interest over the last years towards emulating artificial skin properties. Skin is the largest sensory system of the human body that carries out complex procedures by employing a variety of biological receptors. However, it is quite difficult to acquire stretchable artificial skin functionalities by combining the present tactile sensors. Along these lines, we report here a sensory system that has the ability to detect various strain loads with excellent sensitivity and at the same time respond and store the applied stimuli. In order to attain this goal, we used a bipolar switching memory device made on poly-ethylene naphthalate (PEN) substrate and Pt nanoparticles (NPs)-based sensor on poly-dimethylsiloxane (PDMS). The memristor operates only under strain conditions and retains the induced resistance changes even when the applied stain gauge is removed with <20% resistance attenuation. The sensing element exhibits a colossal gauge factor (GF) of 10(9), which is utilized in order to produce sharp and distinct responses. Moreover, the memristive element exhibits also a quite large memory window (similar to 10(5)) which can be leveraged in order to assimilate various external stimuli. Additionally, paired-pulse facilitation (PPF) and long-term plasticity (LTP) effects are demonstrated indicating the potential perspective of our approach to performing neuromorphic computations with low power consumption.

关键词： Power demand Neuromorphics Memristors External stimuli Tactile sensors Switches Skin

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Unidirectional cellular durotaxis via microfabricated posts of varying anisotropy

Unidirectional cellular durotaxis via microfabricated posts ...

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

作者： Sochol, Ryan D. Higa, Adrienne T. Janairo, Randall R. R. Chou, Annie Li, Song Lin, Liwei Berkeley Sensor and Actuator Center University of California Berkeley CA United States

ISBN: (纸本)9781424441938

This paper presents unprecedented accomplishments toward unidirectional guidance of cellular migration via durotaxis-based microtopography. In contrast to previous efforts, micropost arrays of varying anisotropy (μPVAs) optimize unidirectional control of cell migration through dual axis durotaxis cues which restrict movement in the lateral direction in addition to promoting migration in the direction of increasing micropost stiffness. Preliminary results show 79% of bovine aortic endothelial cells (BAECs) cultured on μPVA substrates migrated within ±60 of the direction of increasing micropost anisotropy. μPVAs offer a simple, yet powerful technique for enabling unidirectional control of cellular migration for a variety of applications in tissue engineering, biomaterials, and medical device implantation. ©2009 IEEE.

关键词： Anisotropy

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ELECTRONIC SKIN FOR DETECTIONS OF HUMAN-ROBOT COLLISION FORCE AND CONTACT POSITION 21

ELECTRONIC SKIN FOR DETECTIONS OF HUMAN-ROBOT COLLISION FORC...

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21st International conference on solid-state sensors, Actuators and Microsystems (Transducers)

作者： Mao, Qian Li, Guozhen Zhu, Rong Tsinghua Univ Dept Precis Instrument State Key Lab Precis Measurement Technol & Instru Beijing Peoples R China

ISBN: (纸本)9780738125626

Nowadays, robots have been widely used in industrial, medical and service fields. With more and more applications of robots, safety in human-robot interaction becomes more important. As an excellent sensing element that can be attached onto mechanical arms of robots, electronic skin (e-skin) has attracted wide interests and been recognized having promising application prospects. However, existing electronic skins relying on multi-sensor array require complex structures and conditioning circuits, as well as complicated fabrication and assembly, which limits their applications to robots. In this paper, we propose an electronic skin based on thermosensation that has a simple structure and can be easily installed on a robotic arm to measure both collision force and position of collision point simultaneously and independently in human-robot interaction. Importantly, the e-skin has a high sensitivity and a broad measuring range, which demonstrates its promising potential in practical robotic application.

关键词： Electronic skin thermosensation collision force measurement contact position measurement high sensitivity

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