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作者： Liu, Chien-Hung Jywe, Wen-Yuh Chen, I.-Ching Duan, Li-Lii Jwo, Hsin-Hung Jeng, Yeau-Ren Hsu, Tung-Hui Teng, Yun-Feng Huang, Hsueh-Liang Wang, Ming-Shi Jäger, Gerd Institute of Electro-Optical and Materials Science National Formosa University Taiwan Department of Automation Engineering National Formosa University 632 Taiwan Ilmenau University of Technology Faculty of Mechanical Engineering Institute of Process Measurement and Sensor Technology PF 100 565 98684 Ilmenau Germany Department of Mechanical Engineering National Chung Cheng University Taiwan Institute of Mechanical Engineering National Chung Cheng University Taiwan Graduate Institute of Electro-Opticaland Materials Science National Formosa University Taiwan Development of Engineering Science National Cheng Kung University Taiwan Department of Automation Engineering National Formosa University Taiwan Department of Automation Engineering National Formosa University Taiwan

In this paper, a dual-beam laser interferometer measurement system for precision machine tools was presented. The straightness measurement module and the angular measurement module were combined to form this measurement system such that the operations of precision machine tools, the positioning, vertical straightness, horizontal straight- ness, pitch and yaw, can be obtained. The resolution of the positioning, straightness and angle has achieved 0.1 nm, 1 nm and 0.1 arcsec, respectively. The performance of this measurement system has been proved by experiments. ©Oldenbourg Wissenschaftsverlag.

关键词： Angle measurement

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Traceable nanometrology realized by means of nanopositioning and nanomeasuring machine

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Key Engineering Materials 2008年 381-382卷 565-568页

作者： Jäger, G. Manske, E. Hausotte, T. Mastylo, R. Dorozhovets, N. Hofmann, N. Technische Universität Ilmenau Institute of Process Measurement and Sensor Technology P.O. Box 100 565 98684 Ilmenau Germany

The today's nanometrology limits the accuracy of the precision engineering. These limits are based on the meter definition as redefined in 1983. It is proposed to define precision mechatronics as the science and engineering of high level precision systems and machines. The paper describes a precision mechatronic machine. This device represents a long range positioning machine having a resolution of 0.I nm over the range of 25 mm × 25 mm × 5 mm. The integration of several optical and tactile nanoprobes makes the 3D-nanopositioning suitable for various tasks. New developed nanoprobes (optical focus probe, nanoindenter, metrological scanning force microscope) and results of measurement will be presented.

关键词： Nanoprobes

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FRICTION IDENTIFICATION AND COMPENSATION ON NANOMETER SCALE

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IFAC Proceedings Volumes 2008年第2期41卷 2014-2019页

作者： A. Amthor T. Hausotte Ch. Ament P. Li G. Jaeger Institute of Automation and Systems Engineering Technische Universität Ilmenau Germany Institute of Process Measurement and Sensor Technology Technische Universität Ilmenau Germany

This work concerns the modelling and experimental verification of the highly nonlinear friction behavior in positioning on the nanometer scale. The main goal of this work is to adjust and identify a simple dynamic friction model which allows a model-based estimation of the friction force in combination with the system inertia against displacement. Experiments in the pre-sliding and sliding friction regimes are conducted on an experimental setup. A hybrid two-stage parameter estimation algorithm is used to fit the model parameters based on the experimental data. Finally, the identified friction model is utilized as a model-based feedforward controller combined with a classical feedback controller to compensate the nonlinear friction force and reduce tracking errors.

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Hysteresis modelling of NiZn-Ferrites

Hysteresis modelling of NiZn-Ferrites

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International Spring Seminar on Electronics technology

作者： Paul Fulmek Peter Haumer Gert Holler Department of Applied Electronic Materials Institute of Sensor and Actuator Systems University of Technology Vienna Vienna Austria Institute of Electrical Measurement and Measurement Signal Processing Graz University of Technology Austria

The energetic model of ferromagnetic hysteresis (EM) is applied to typical MnZn-ferrite-material. The EM simulates hysteresis loops from the demagnetised state up to saturation, including all sorts of major and minor loops and their dependence on the rate of change with time. Due to the high specific resistivity of ferrites the hysteresis losses dominate the losses of ferrite components, even at high frequencies. The EM is used to directly determine hysteresis losses for small excitations by a Rayleigh-law-approximation. The simulation results are compared to measurements on a typical commercial MnZn-ferrite-torus.

关键词： Magnetic hysteresis Magnetic materials Anisotropic magnetoresistance Toroidal magnetic fields Magnetic anisotropy Perpendicular magnetic anisotropy Biological system modeling Saturation magnetization Magnetostriction Equations

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Structural and photoconducting properties of MBE and MOCVD grown III-nitride double-heterostructures

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MRS Online Proceedings Library 2008年第1期1076卷 1-7页

作者： Hauguth-Frank, Sindy Lebedev, Vadim Tonisch, Katja Romanus, Henry Kups, Thomas Büchner, Hans-Joachim Jäger, Gerd Ambacher, Oliver Schober, Andreas Institute of Micro- and Nanotechnologies Ilmenau Technical University Ilmenau Germany Fraunhofer Institute for Applied Solide State Physics Freiburg Germany Institute of Measurement and Sensor Technology Ilmenau Technical University Ilmenau Germany

Investigations on standing wave (SW) interferometry come in focus of interest in the course of ongoing miniaturization of high precision length measurement systems. A key problem within these efforts is the development of a transparent ultra-thin photodetector for sampling the intensity profile of the generated SW. Group III-materials are promising candidates to ensure a good photodetector performance combined with the required optical transparency. In this work, we report on the interrelation of strain and dislocation density along with the influence of the structural properties on the sensitivity of double-heterostructure III-nitride photodetectors grown by molecular beam and metal organic vapour phase epitaxy.

关键词： structural optoelectronic III-V

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Multifunction spectrometer for optical inspection of red wine

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Sensing and Instrumentation for Food Quality and Safety 2008年第1期2卷 58-65页

作者： Niskanen, Ilpo Mutanen, Jarkko Lehtonen, Pekka Räty, Jukka Yamaguchi, Masahiro Peiponen, Kai-Erik Jaaskelainen, Timo Measurement and Sensor Laboratory Research and Development Centre of Kajaani University of Oulu Technology Park 127 Kajaani 87400 Finland Imaging Science and Engineering Laboratory Tokyo Institute of Technology 4259 Nagatsuta Midori-ku Yokohama 226 Japan Alko Incorporated Alcohol Control Laboratory P.O. Box 279 Vantaa 01301 Finland Department of Physics and Mathematics University of Joensuu P.O. Box 111 Joensuu 80101 Finland

The main goal of this study was to develop an apparatus that makes it possible to measure both, color, refractive index and light scattering (turbidity) of red wines using a single device only. Typically such measurement of red wine quality requires three different measurement devices. As an example of the efficiency of the present device we studied the change of the thermo-optical and time-dependent optical properties of red wine samples. Here we report on change of optical properties of two Merlot wine samples, which were obtained by opening authentic red wine bottles and preserving a set of samples both at room and refrigerator temperature for 26 days, respectively. The interesting feature with both red wine samples was that the light scattering, i.e. the turbidity of the samples, increased as a function of time due to oxidation process. It is suggested that the multifunction spectrophotometer can be applied for optical inspection of red and other wine products. © Springer Science+Business Media, LLC 2008.

关键词： Wine

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Surface plasmon resonance biochip based on ZnO thin film for nitric oxide sensing

Surface plasmon resonance biochip based on ZnO thin film for...

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Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

作者： Wei-Yi Feng Nan-Fu Chiu Hui-Hsin Lu Hsueh-Ching Shih Dongfang Yang Chii-Wann Lin Institute of Biomedical Engineering National Taiwan University Taiwan Institute of Electrical Engineering National Taiwan University Taiwan Center for Measurement Standards Industrial Technology and Research Institute Hsinchu Taiwan Intergrated Manufacturing National Research Council Technologies Institute London Canada Medical Micro Sensor and System Laboratory Institute of Biomedical Engineering National Taiwan University Taipei Taiwan

In this study, the design of a novel optical sensor that comprises surface plasmon resonance sensing chip and zinc oxide nano-film was proposed for the detection of nitric oxide gas. The electrical and optical properties of zinc oxide film vary in the presence of nitric oxide. This effect was utilized to prepare biochemical sensors with transduction based on surface plasmon resonance. Due to the refractive index of the transparent zinc oxide film that was deposited on the gold film, however, changes will be observed in the surface plasmon resonance spectra. For this reason, the thickness of zinc oxide film will be investigated and determined in this study. The interaction of nitric oxide with a 20 nm zinc oxide layer on gold leads to the shift of the resonance angle. The analysis on the reflectance intensity of light demonstrates that such effect is caused by the variation of conductivity and permittivity of zinc oxide film. Finally, a shift in surface plasmon resonance angle was measured in 25 ppm nitric oxide at 180C and a calibration curve of nitride oxide concentration versus response intensity was successfully obtained in the range of 250 to 1000 ppm nitric oxide at lower temperature of 150C. Moreover, these effects are quasi-reversible.

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Ultra-thin InGaN photodetectors for standing wave interferometry

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physica status solidi c 2008年第6期5卷

作者： S. Hauguth-Frank V. Lebedev H.-J. Büchner G. Jäger O. Ambacher Institute of Micro- and Nanotechnologies Technical University Ilmenau 98693 Ilmenau Germany Institute of Measurement and Sensor Technology Technical University Ilmenau 98693 Ilmenau Germany

In this work, we report on the fabrication as well as on the structural and optoelectronical characterisation of ultra-thin In-rich In x Ga 1–x N (0.56 < x < 1) metal-semiconductor-metal photodetectors designed for standing wave intensity profile measurements at the wavelength of He-Ne laser. In particular, In 0.64 Ga 0.36 N/GaN structures have shown a short time response close to the RC time constant of ∼0.6 μs at low fields, with transparency of more than 77%. Structural analysis of InB 0.64B GaB 0.36B N layer showed no phase separation phenomena. However, a large biaxial strain and a gradient in the In content along the c-axis have been observed driven by enormous biaxial strain in the heterostructure. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

关键词： 73.40.Sx 85.60.Gz

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Fiber optic strain measurement for machine monitoring

Fiber optic strain measurement for machine monitoring

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Optical measurement Systems for Industrial Inspection V

作者： Hoffmann, L. Mueller, M.S. Koch, A.W. Technische Universitaet Muenchen Institute for Measurement Systems and Sensor Technology Theresienstr. 90 80333 Munich Germany

ISBN: (纸本)0819467588

Monitoring machines during operation is an important issue in measurement engineering. The usual approach to monitoring specific machine components is using strain gauges. Strain gauges, however, may sometimes not be used if conditions are harsh or installation space is limited. Fiber optic sensors seem to be an alternative here, but dynamic health monitoring has been difficult so far. The focus of this field study is to measure vibration characteristics of machine parts during operation using fiber optic sensors with the objective of early damage detection. If that was possible, downtime and maintenance costs could be minimized. Therefore a field test for dynamic fiber optic strain measurement on a roller bearing was carried out. The test setup consisted of the bearing built into a gear test stand and equipped with an array of fiber Bragg grating sensors. Fifteen fiber sensors were interrogated with a sample rate of 1 kHz and the vibration pattern was extracted. The radial load distribution was measured with high spatial resolution and a high degree of compliance with simulation data was found. The findings suggest that fiber optic health monitoring for machine components is feasible and reasonable. Especially with the help of distributed sensing on various components extensive health monitoring on complex technical systems is possible.

关键词： Optical fibers

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Applications of fibre optic temperature measurement

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Proceedings of the Estonian Academy of Sciences: Engineering 2007年第4期13卷 363-378页

作者： Hoffman, Lars Müller, Mathias S. Krämer, Sebastian Giebel, Matthias Schwotzer, Günther Wieduwilt, Torsten Measurement Systems and Sensor Technology Technical University of Munich Theresienstr. 90 80333 Munich Germany Distributed Measurement Systems Technical University of Munich Theresienstr. 90 80333 Munich Germany Institute of Photonic Technology Albert-Einstein-Strasse 9 07745 Jena Germany

Temperature measurement is crucial for many industrial processes and monitoring tasks. Most of these measurement tasks can be carried out using conventional electric temperature sensors, but with limitations. Particularly under harsh conditions, fibre optic temperature sensors show their advantages over conventional instrumentation. Three common principles of fibre optic temperature measurement are exemplarily examined: fibre Bragg gratings, Raman scattering and interferometric point sensors. Their working principles along with recent findings and applications of the sensing concepts are presented. So far their application is still limited to niche markets but with decreasing system prices fibre optic temperature sensing has great potential for further growth.

关键词： Fiber optic sensors

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