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作者： Marangoni, Rafael R. Schleichert, Jan Rahneberg, Ilko Mastylo, Rostyslav Manske, Eberhard Fröhlich, Thomas Technische Universität Ilmenau Faculty of Mechanical Engineering Institute of Process Measurement and Sensor Technology PF 100 565 Ilmenau98684 Germany

An experimental setup for performing micro-scratching tasks and measuring the forces involved in the process is presented in this paper. The main component of the system is a multi-component force and torque sensor based on the principle of electromagnetic force compensation (EMFC). With this device it is possible to perform the micromachining process itself while simultaneously measuring the interaction forces between the tool tip and the test specimen. Experiments were performed with specimens of polished steel, silicon and glass. Planar micro-structures could be produced and tool point interaction forces in the order of some millinewtons were measured during the process. © 2017 Walter de Gruyter Berlin/Boston.

关键词： Micromachining

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Combined development and test of product-service systems in early product development stages for customized, availability-oriented business models in the capital goods industry

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Procedia CIRP 2018年 72卷 714-719页

作者： Felix Ströer Paaranan Sivasothy Karl-G. Faißt Hristo Apostolov Thomas Eickhoff Dani Bechev Georgis Bulun Jörg Seewig Martin Eigner Bernd Sauer Institute for Measurement and Sensor-Technology Gottlieb-Daimler-Str. 44 67663 Kaiserslautern Germany Institute for Virtual Product Engineering Gottlieb-Daimler-Str. 44 67663 Kaiserslautern Germany Institute of Machine Elements Gears & Transmissions Gottlieb-Daimler-Str. 44 67663 Kaiserslautern Germany

Availability-Oriented Product-Service Systems (AOPSS) give manufacturers of capital goods the opportunity to expand their offerings while fulfilling the customers’ needs for product availability. In turn, they generate special requirements for the early product development phase. Condition monitoring has to be taken into account, which results in a contradiction since learning-based condition monitoring approaches require large amounts of data which isn’t available in that particular stage. Techniques from model-based systems engineering allow solving problems newly arising when developing parts or products in AOPSS. The approach proposed in the paper is being illustrated based on a use case from the agricultural industry.

关键词： Product-Service Systems Model-Based Systems engineering Digital Twin Conditon Monitoring Physical Modeling

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Design of temperature compensation for silicon-sapphire pressure sensor

Design of temperature compensation for silicon-sapphire pres...

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2017 IEEE International Conference on Imaging Systems and Techniques, IST 2017

作者： Manguo, Huang Defeng, Liu Chao, Lu Zhanshe, Guo Xin, Li Advanced Sensor Technology Center AVIC Beijing Changcheng Aeronautic Measurement Control Technology Research Institute Aviation Key Laboratory of Science and Technology Special Condition Monitoring Sensor Technology Beijing China School of Instrument Science and Opto-electronics Engineering State Key Laboratory of Virtual Reality Technology and Systems Beihang University Beijing China

ISBN: (纸本)9781538616208

In order to solve the problem that the temperature drift of the silicon-on-sapphire pressure sensor is too large to reduce the accuracy of pressure measurement at high temperature, a temperature compensation scheme based on a single chip is proposed. The temperature of the working environment is obtained by a PT100, and integrated with the output of pressure sensor to calculate the compensated pressure sensor. Problems of power supply and signal acquisition are solved by the high precision, low drift voltage and current references, programmable amplifiers and high precision ADCs on chip. According to the working characteristics of the silicon-on-sapphire pressure sensor, an efficient temperature compensation algorithm is designed, and written to the on-chip ARM processor. The experimental results show that the maximum measurement error of pressure in the temperature range of -20∼250°C and measurement range of 0∼28 MPa is 8.37%FS before compensation and reduced to 0.3%FS after compensation. The accuracy of the sensor is greatly improved by the compensation system. © 2017 IEEE.

关键词： Pressure sensors

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Breaking the energy-symmetry blockade in magneto-optical rotation

arXiv

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arXiv 2018年

作者： Zhu, Chengjie Zhou, Feng Zhu, Eric Y. Hagley, E.W. Deng, L. MOE Key Laboratory of Advanced Micro-Structured Materials School of Physics Science and Engineering Tongji University Shanghai200092 China Engineering Physics Division National Institute of Standards & Technology GaithersburgMD20899 United States uhan Institute of Physics & Mathematics Chinese Academy of Sciences Wuhan430071 China School of Optical and Electronic Information Huazhong University of Science & Technology Wuhan430074 China Quantum Measurement Division National Institute of Standards & Technology GaithersburgMD20899 United States Department of Electrical and Computer Engineering University of Toronto TorontoONM5S 3G4 Canada Sensor Science Division National Institute of Standards & Technology GaithersburgMD20899 United States

The magneto-optical polarization rotation effect has prolific applications in various research areas spanning the scientific spectrum including space and interstellar research, nano-technology and material science, biomedical imaging, and sub-atomic particle research. In nonlinear magneto- optical rotation (NMOR), the intensity of a linearly-polarized probe field affects the rotation of its own polarization plane while propagating in a magnetized medium. However, typical NMOR signals of conventional single-beam Λ-scheme atomic magnetometers are peculiarly small, requiring sophisticated magnetic shielding under complex operational conditions. Here, we show the presence of an energy-symmetry blockade that undermines the NMOR effect in conventional single-beam Λ-scheme atomic magnetometers. We further demonstrate, both experimentally and theoretically, an inelastic wave-mixing technique that breaks this NMOR blockade, resulting in more than five orders of magnitude (>300,000-fold) NMOR optical signal power spectral density enhancement never before seen with conventional single-beam Λ-scheme atomic magnetometers. This new technique, demonstrated with substantially reduced light intensities, may lead to many applications, especially in the field of bio-magnetism and high-resolution low-field magnetic imaging. Copyright © 2018, The Authors. All rights reserved.

关键词： Medical imaging

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Scanning strategies for long term and long distance AFM measurements 16

Scanning strategies for long term and long distance AFM meas...

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16th International Conference of the European Society for Precision engineering and Nanotechnology, EUSPEN 2016

作者： Vorbringer-Dorozhovets, Nataliya Manske, Eberhard Production and Precision Measurement Technology Group Institute for Process Measurement and Sensor Technology Department of Mechanical Engineering Technische Universität Ilmenau Germany

ISBN: (纸本)9780956679086

Long range AFM measurements are mainly affected by drift caused by relative long measurement times and by tip wear caused by large measurement distances. One way to avoid these effects is to reduce measurement times and scanning distances. Special intelligent scanning strategies were developed and investigated. These strategies are based on adaptive sampling and different trajectories. This paper gives an introduction into the implemented scanning strategies. This paper presents one example of the developed "adaptive sampling" strategy as well as first results of the circular scan.

关键词： Scanning

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Generating ideal reference geometry for cutting edges

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Journal of Physics: Conference Series 2018年第14期1065卷

作者： Abdullah Karatas Jörg Seewig University of Kaiserslautern Department of Mechanical and Process Engineering Institute for Measurement and Sensor-Technology Gottlieb-Daimler-Str. Building 44 D-67663 Kaiserslautern Germany

In the last years, many different techniques for rating cutting edges were presented. Nevertheless an automatic measurement and indication of quality from cutting edges was covered less attention. Although the state of cutting edges is very important in many cases during the manufacturing process. An automatic indication of quality can roughly be realised in three steps. The step, generating an ideal reference geometry from measured data, will be discussed in this paper. Therefore different types of splines and a robust filtering method is used. The other two steps, mainly measuring and estimating quantification parameters, were discussed in diverse sources.

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The Emerging Field of Quantum Based measurements for Pressure, Vacuum and Beyond

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Journal of Physics: Conference Series 2018年第16期1065卷

作者： J Hendricks Z Ahmed D Barker P. Egan K Douglass S Eckel J Fedchak N Klimov J Ricker J Scherschligt J. Stone National Institute of Standards and Technology Physical Measurement Laboratory Sensor Science Division Thermodynamic Metrology Group 100 Bureau Drive Gaithersburg MD 20899-8363 National Institute of Standards and Technology Physical Measurement Laboratory Engineering Physics Division Dimensional Metrology Group 100 Bureau Drive Gaithersburg MD 20899-8363

The future of pressure, vacuum and even temperature measurement will employ lasers, Fabry-Perot optical cavities, cold atom traps and lots of quantum physics. For pressure measurement of a gas, photons interact at the quantum level such that light travels at a slower speed in gas than it does in vacuum. For extreme vacuum measurements, cold atom traps will be used to detect single collisions between gas trapped cold atoms enabling the number density of the gas to be measured. For temperature measurement is performed using silicon photonics to detect the small changes in refractive index in micro machined siliconphontoic cavities coupled to optical fibers. For dynamic pressure, NIST is developing a method where the unique quantum mechanical characteristics of the molecules are themselves the standard for pressure, making it consistent with the quantum-SI. Our approach is to use independent molecular spectroscopy as a dynamic measurement of pressure, where the pressure and temperature is ascertained by measuring time-resolved pressure-broadened spectra of CO molecules. This paper briefly reviews the status of these projects currently underway at the NIST Thermodynamic Metrology Group.

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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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Influence of surface morphology on fatigue behavior of metastable austenitic stainless steel AISI 347 at ambient temperature and 300°C

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Procedia Structural Integrity 2017年 5卷 989-996页

作者： Marek Smaga Robert Skorupski Patrick Mayer Benjamin Kirsch Jan C. Aurich Indek Raid Jörg Seewig Jiří Man Dietmar Eifler Tilmann Beck Institute of Materials Science and Engineering University of Kaiserslautern P.O. Box 3049 67653 Kaiserslautern Germany Institute for Manufacturing Technology and Production Systems University of Kaiserslautern P.O. Box 3049 67653 Kaiserslautern Germany Institute for Measurement and Sensor-Technology University of Kaiserslautern P.O. Box 3049 67653 Kaiserslautern Germany Institute of Physics of Materials ASCR Žižkova 22 616 62 Brno Czech Republic

The effect of surface modification by cryogenic turning on fatigue behavior of metastable austenitic stainless steel AISI 347 was investigated in stress-controlled fatigue tests at ambient temperature (AT) and 300 °C in air. Five different surface morphologies were manufactured by the variation of turning parameters – with and without cryogenic CO 2 snow cooling and feed velocity as well as by the application of polishing for reference surfaces with a very small surface roughness. For a comprehensive characterization of the surface and near surface morphology, X-ray diffraction investigations were performed. Three phases (γ-austenite, α-martensite and ε-martensite) were detected in the near-surface microstructure after cryogenic turning while after turning without cryogenic cooling the only microstructural constituent was γ-austenite. Moreover, residual stress state, micro hardness and surface roughness play an important role in surface morphology. The experimental data on the cyclic deformation behavior and stress-strain response of all surface morphologies are reported. Reference specimens with purely austenitic surface microstructure show the highest plastic strain amplitude during cyclic loading at both AT and 300°C. At elevated temperature these specimens achieved the shortest fatigue life. Martensitic surface layers induced by cryogenic turning result in the reduction of plastic strain amplitude during cyclic loading and significantly enhance fatigue life at both tested temperatures.

关键词： metastable austenitic stainless steels martensite surface morphology cryogenic turning fatigue

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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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