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International Conference on Space Optics 2010, ICSO 2010

作者： Plattner, M.P. Buck, T.C. Eder, B. Reutlinger, A. McKenzie, I. Kayser-Threde GmbH Department of Optical Instruments and Telescopes Germany Technische Universitaet Muenchen Institute for Measurement Systems and Sensor Technology Germany European Space Agency Optoelectronics Section Netherlands

ISBN: (纸本)9781510616196

We present our work about the development of two complementary interrogation schemes based on fiber optic sensing for the use of structural and thermal monitoring of Ariane launchers. The advantages of fiber optic sensing in particular light-weight, immunity to electromagnetic interferences and the possibility of sensor distribution along optical fibers are driving factors for utilization of this technology in space crafts [1]. The edge-filter (EF) and scanning-laser (SL) interrogators for determination of the mean wavelength of fiber Bragg grating (FBG) sensors have been implemented as two separate demonstrators. Within this paper we describe the functional principles of both interrogators. Furthermore we present test results where the developed systems have been used for readout of FBG sensors which are implemented in an Ariane structural demonstrator during thermal, thermal-vacuum and vibration tests. Functionality of both systems is demonstrated and their potential for further development towards space qualified systems is shown. Since the performance characteristics of the two systems are different from each other, they are dedicated for different sensing applications on a launcher. The EF sensor interrogator provides a sample rate of 20 kHz at a number of 4 connected sensors and supports parallel readout and aliasing free operation. Therefore it is best suited for high priority measurement. Structural monitoring which requires the acquisition of real time sensor information in order to support control of the launcher is one operation area for a future EF system. The SL interrogator provides an overall measurement rate of 1 kHz at a number of 24 connected sensors distributed on three sensor channels. It can be adapted to any sensors that have design wavelengths lying within the output spectrum of the laser diode. Furthermore the number of overall sensors to be read out with this system can be adapted easily. Thermal mapping of satellite panels is one possible f

关键词： Fiber Bragg gratings

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Development of a smart acceleration measurement unit for industry 4.0 15

Development of a smart acceleration measurement unit for ind...

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15th International Multi-Conference on systems, Signals and Devices, SSD 2018

作者： Trigona, Carlo Bradai, Sonia Naifar, Slim Rosa, Roberto La Baglio, Salvatore Kanoun, Olfa Dipartimento di Ingegneria Elettrica Elettronica e Informatica D.I.E.E.I University of Catania Viale Andrea Doria 6 Catania95125 Italy Technische Universität Chemnitz Department for Measurement and Sensor Technology Reichenhainer Straβe 70 Chemnitz09126 Germany Laboratory of Electromechanical Systems National Engineering School of Sfax University of Sfax Route de Soukra km 4 Sfax3038 Tunisia STMicroelectronics Stradale Primo Sole 50 Catania95121 Italy

ISBN: (纸本)9781538653050

One of the main issues taken into account concerns the reduction of power consumption. In particular, also the 'standby' condition must be accounted and it represents a significant amount of the total power dissipation. systems using a wake-up strategy transmit the data only when the measurand exceeds a specific threshold level. This operation strategy also named 'Zero-Current Standby' has been pursued in this paper. In particular, we present a smart acceleration measurement unit, based on a piezoelectric transducer which is capable to monitor sinusoidal vibrations (50 Hz) coming from vibrating devices, such as electrical machine, industrial equipment, instrumentations, etc.). The proposed smart acceleration measurement unit provides the power required by the electronic conditioning circuit and the Bluetooth transmitter only when the level of acceleration overcomes a fixed threshold. This threshold can be adjusted to corresponding values to a malfunction of the vibrating device. The activity of the device can be monitored within an IoT approach using a specially developed APP. Laboratory characterization and experimental results are also presented. They show a linear characteristic, which makes the proposed system suitable for many applications. © 2018 IEEE.

关键词： Industry 4.0

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Dermal Tattoo Biosensors for Colorimetric Metabolite Detection

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Angewandte Chemie 2019年第31期131卷

作者： Ali K. Yetisen Rosalia Moreddu Sarah Seifi Nan Jiang Katia Vega Xingchen Dong Jie Dong Haider Butt Martin Jakobi Martin Elsner Alexander W. Koch Institute for Measurement Systems and Sensor Technology Technical University of Munich 80333 Munich Germany School of Chemical Engineering University of Birmingham Edgbaston Birmingham B15 2TT UK School of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA Department of Design University of California Davis CA 95616 USA Department of Mechanical Engineering Khalifa University Abu Dhabi 127788 United Arab Emirates Chair of Analytical Chemistry and Water Chemistry Technical University of Munich 81377 Munich Germany

Tattooing is a ubiquitous body modification involving the injection of ink and/or dye pigments into the dermis. Biosensors in the form of tattoos can be used to monitor metabolites in interstitial fluid. Here, minimally invasive, injectable dermal biosensors were developed for measuring pH, glucose, and albumin concentrations. The dermal pH sensor was based on methyl red, bromothymol blue, and phenolphthalein, which responded to a pH range from 5.0 to 9.0. The dermal glucose sensor consisted of glucose oxidase, 3,3′,5,5′‐tetramethylbenzidine, and peroxidase that detected concentrations up to 50.0 mmol L −1 . The dermal albumin sensor consisted of 3′,3′′,5′,5′′‐tetrachlorophenol‐3,4,5,6‐tetrabromosulfophthalein to measure concentrations up to 5.0 g L −1 . The sensors were multiplexed in ex vivo skin tissue and quantitative readouts were obtained using a smartphone camera. These sensors can be used to manage of acid–base homeostasis, diabetes, and liver failure in point‐of‐care settings.

关键词： Dermatologie Kolorimetrische sensoren Photomedizin Tätowierungen Tinten

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Photoacoustic CO2-sensor for Automotive Applications

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Procedia Engineering 2016年 168卷 3-6页

作者： J. Huber C. Weber A. Eberhardt J. Wöllenstein Fraunhofer Institute for Physical Measurement Techniques IPM Department of Gas and Process Technology Group of Integrated Sensor Systems 79110 Freiburg Germany Department of Microsystems Engineering - IMTEK University of Freiburg Germany

We present a field-tested miniaturized spectroscopic CO 2 sensor which is based on the photoacoustic effect. The sensor is developed for automotive applications and considers the requirements for the usage in vehicles. The sensor measures two measurement ranges simultaneously: The monitoring of the indoor air quality and the detection of possible leakages of the coolant in CO 2 air-conditioning systems. The sensor consists of a miniaturized innovative photoacoustic sensor unit with integrated electronics. The sensor was characterized in detail in laboratory and the capability for automotive applications was proven in field measurements in a test car. Furthermore the potential for market entry is discussed.

关键词： gas sensor photoacoustic carbon dioxide spectroscopy automotive

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Miniaturized Photoacoustic Carbon Dioxide sensor with Integrated Temperature Compensation for Room Climate Monitoring

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Procedia Engineering 2015年 120卷 283-288页

作者： J. Huber A. Ambs J. Wöllenstein Fraunhofer Institute for Physical Measurement Techniques IPM Department of Gas and Process Technology Group of Integrated Sensor Systems 79110 Freiburg Germany Department of Microsystems Engineering - IMTEK University of Freiburg Germany

A miniaturized photoacoustic spectroscopic gas sensor for room climate monitoring is presented with the measurement range of 0 –5000 ppm. The sensor consists of an innovative photoacoustic detection unit with an integrated mobile phone microphone as pressure sensor. As IR-source a broadband thermal emitter is used. The emitter is modulated with 13 Hz at a maximum temperature of about 750 °C. An electronic unit with a microcontroller on a 3D-PCB design has been developed. The sensor reaches a resolution better than 50 ppm CO 2 . A detailed characterization of the setup has been carried out. An integrated temperature compensation is realized to improve the sensor performance under varying environmental conditions. The potential for further miniaturization and the realization as a low-cost mass market sensor is shown.

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Characterisation of the tool wear during ductile polishing of ceramic tiles using morphological space

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International Journal of Abrasive technology 2016年第3期7卷 216-225页

作者： Sousa, Fábio José Pinheiro Seewig, Jörg Do Nascimento, Rubens Maribondo Chiamulera, Cátia Alarcon, Orestes Estevam Weingärtner, Walter Lindwolf Department of Mechanical Engineering Institute for Manufacturing Technology and Production Systems - FBK University of Kaiserslautern P.O. Box 3049 KaiserslauternD-67653 Germany Department of Mechanical Engineering Institute for Measurement and Sensor-Technology - MTS University of Kaiserslautern P.O. Box 3049 KaiserslauternD-67653 Germany Department of Material Engineering Federal University of Rio Grande Do Norte Natal - RNCEP 59078-900 Brazil Embraer Av. Alcides Cagliari 2281 B-200 Botucatu - SP18606-855 Brazil Department of Mechanical Engineering Federal University of Santa Catarina P.O. Box 476 Florianópolis - SCCEP 88040-900 Brazil

The present work is focused on the wear of the abrasive tools during the industrial polishing process of porcelain stoneware tiles, aiming to extend the validity of using morphological space to quantify the wear when very fine abrasive tools are used. In such morphological space, the horizontal and vertical axes are respectively the skewness (Sk) and the kurtosis (K) of the distribution of heights taken from several surface profiles. Despite the existence of an intrinsic interaction between Sk and K, the approach enables the sequence of geometrical changes suffered by the fickert surface to be quantitatively evaluated. The experimental points obtained were nearly aligned and with a negative slope, just as expected for abrasive wear. Implausibly, the results for fine abrasive fickerts was much more scattered than for those with coarse abrasive particles found in literature. Copyright © 2016 Inderscience Enterprises Ltd.

关键词： Silicon carbide

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A Model-Based Temperature Estimator for Improving sensor Dynamics in Vehicle Exhaust systems

A Model-Based Temperature Estimator for Improving Sensor Dyn...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Thomas Guther Holger Bonicke Christoph Ament Silke Augustin Thomas Frohlich Department of Systems Analysis Ilmenau University of Technology Department of Process Measurement and Sensor Technology Ilmenau University of Technology

ISBN: (纸本)9781479902255

With the advent of fast processors, real-time process control is becoming an important component of modern automobile industrial products. Normally, heat transfer processes possess large time constants and, as a consequence, temperature sensors are relatively slow. In order to protect against the hostile environment, temperature sensors used in vehicle exhaust systems need additional casing. Due to the casing, the heat transfer from the surface of the casing to the sensor is decreased even further. In order to design a feedback control for the vehicle, accurate information about the temperature inside the exhaust system is required which needs to be estimated from the measured temperature inside the exhaust system. In this paper, we develop a model of the sensor and use a Kalman filter for the prediction of the ambient temperature from the measurements. Further, we validate our results with suitable tests and compare the test results with the simulation results.

关键词： Signal Processing Modelling Prediction Thermocouple Heat Transfer Exhaust System Combustion Engine EXHAUST GAS SYSTEM Heat transfer combustion engine Thermocouple signal processing Casings Modeling Vehicle Emissions sensors feedback control Kalman filters heat transfer surface Temperature sensor Device Component

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Impedance spectroscopy in solid state electrolyte characterization

Impedance spectroscopy in solid state electrolyte characteri...

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9th International Multi-Conference on systems, Signals and Devices, SSD 2012

作者： Wendler, F. Büschel, P. Kanoun, O. Schadewald, J. Bufon, C. C. Bof Schmidt, O.G. Department of Measurement and Sensor Technology Chemnitz University of Technology Chemnitz Germany Institute for Integrative Nanosciences IFW Dresden Dresden Germany Department of Material Systems for Nanoelectronics Chemnitz University of Technology Chemnitz Germany

ISBN: (纸本)9781467315906

In this work, a method for the determination of the ion concentration and the diffusion coefficient of lithium ions in a phosphorus oxynitride will be presented. The reproducibility of the parameter extraction and the entire measurement process will be evaluated. The obtained results are in the value range of publications of similar sample properties. © 2012 IEEE.

关键词： Solid state devices

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Ultrasonic shear wave elastography for compliance-weighted-imaging

Ultrasonic shear wave elastography for compliance-weighted-i...

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IEEE Instrumentation and measurement technology Conference

作者： V. Rengaraju I. Sack Ch. Kargel Division of Sensor Technology and Measurement Systems Bundeswehr University of Munich Neubiberg Germany Department of Radiology Charité-Universitaetsmedizin Berlin Berlin Germany

Ultrasonic shear wave elastography is a dynamic method that allows in-vivo measurement of the shear elasticity of human tissue. Recovering elasticity maps from time-harmonic wave data remains a major challenge since the calculation of spatially resolved elasticity parameters encounters ill-posed inverse problems due to noise and unknown boundary conditions. Therefore, compliance-weighted-imaging (CWI) is introduced to ultrasonic shear wave elastography for the measurement of elasticity ratios and the visualization of elastic heterogeneities by the amplitude alteration of harmonic shear strain due to wave scattering. In this paper, the results of experiments performed on tissue-mimicking phantoms comprising a planar interface between the hard and soft compartments, and a soft cylindrical inclusion embedded in stiffer background are shown and compared to theoretical models. The proposed ultrasound based CWI method is potentially interesting for the detection of pathological lesions such as medical applications.

关键词： Scattering Ultrasonic imaging Phantoms Strain Vibrations Acoustics Elasticity

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Inkjet printing of chemiresistive sensors based on polymer and carbon nanotube networks

Inkjet printing of chemiresistive sensors based on polymer a...

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IEEE SSD International Multi-Conference on systems, Signals and Devices

作者： P. Lorwongtragool E. Sowade T. N. Dinh O. Kanoun T. Kerdcharoen R. R. Baumann Faculty of Science Materials Science and Engineering Programme and Center of Intelligent Materials and Systems (CIMS) Mahidol University Bangkok Thailand Institute for Print and Media Technology Department of Digital Printing and Imaging Technology Chemnitz University of Technology Chemnitz Germany Measurement and Sensor Technology Chemnitz University of Technology Chemnitz Germany Faculty of Science Department of Physics Mahidol University Bangkok Thailand

ISBN: (纸本)9781467315906

We report about the manufacturing of sensor devices for detection of volatile organic compounds (VOCs) in the air. The sensor comprises three fully inkjet-printed layers of (i) silver interdigitated electrodes (SIDE), (ii) multi-walled carbon nanotubes (MWCNTs) and (iii) poly (styrene-co-maleic acid) partial isobutyl/methyl mixed ester (PSE). We have found that inkjet printing of MWCNT layers and a PSE layer on top yields an interfacial layer leading to the formation of a MWCNTs/PSE composite-like structure. The printed layers act as chemiresistive vapor sensors due to the change of electrical resistance in presence of selected VOCs. The sensor responses to various VOCs were studied by varying the concentration of the chemicals in the air between 50 and 500 ppm. The sensing mechanism can be understood as a fractional volume change of the inkjet-printed polymer that occurs during exposure to VOCs, resulting in a structural alteration of the MWCNT-polymer network. We have found that the sensor response can be defined as a function of the VOC's concentration. To investigate the morphologies of the inkjet-printed thin films, profilometry and scanning electron microscopy (SEM) were employed.

关键词： Chemical sensors Printing Polymers Resistance Carbon nanotubes Gas detectors

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