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17th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2017

作者： Klauer, Katja Eifler, Matthias Schneider, Frank Seewig, Jörg Aurich, Jan C. University of Kaiserslautern Institute for Measurement and Sensor-Technology Germany University of Kaiserslautern Institute for Manufacturing Technology and Production Systems Germany

ISBN: (纸本)9780995775107

Ageing effects can influence the properties of engineering surfaces, especially when highly precise surface structures like roughness artefacts are considered. In order to describe the behaviour of roughness artefacts after a given period of use and storage, the impact of ageing on their use and recommendations for their handling are investigated. In the experimental studies the roughness artefacts were exposed to constant temperatures in a climatic chamber and extracted after individually defined time spans before their surface topography was characterised with a large number of stylus instrument measurements. As a quality indicator the ISO 13565-2 roughness parameters were evaluated to characterise the ageing process at different temperatures.

关键词： Surface roughness

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From Hand to Heart

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German Research 2019年第3期40卷

作者： Dr.-Ing. Christian Hatzfeld Nataliya Koev MSc Prof. Dr.-Ing. habil. Roland Werthschützky Technische Universität Darmstadt Fachgebiet Mess- und Sensortechnik Merckstr. 25 64283 Darmstadt Germany Leads the Haptic Systems Team in the Measurement and Sensor Technology Group at TU Darmstadt. Research assistant in the HapCath project in the Measurement and Sensor Technology Group. Led until his retirement the Measurement and Sensor Technology Group and is the project leader for HapCath.

A cardiac catheterization may be a routine procedure, but it is still associated with a degree of risk. Engineers have now developed an assistance system that allows the guide wire to be navigated more easily and accurately thanks to a miniaturised force sensor and that provides haptic feedback to the cardiologist.

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Micro-milling of areal material measures – influences on the resulting surface topography

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Procedia CIRP 2018年 71卷 122-127页

作者： Matthias Eifler Katja Klauer Benjamin Kirsch Jörg Seewig Jan C. Aurich Institute for Measurement and Sensor-Technology Technische Universität Kaiserslautern Gottlieb-Daimler Str. 67663 Kaiserslautern Germany Institute for Manufacturing Technology and Production Systems Technische Universität Kaiserslautern Gottlieb-Daimler Str. 67663 Kaiserslautern Germany

Increasing requirements on the accuracy of parts and surface structures generate a necessity of adequate areal surface topography measuring instruments. The calibration of those is decisive and has to be adapted to the measurement application. Additionally, just as the tasks for topography measurement to be calibrated, the geometries of the material measures for their calibration are becoming more complex and deterministic. As the calibration of areal surface topography measuring instruments requires nanometer-precision, there are high requirements for the reproducibility of the manufacturing process and the surface quality of the utilized material measures. Only rare results can be found in literature on the manufacturing of areal roughness material measures with micro-milling and we aim at a sound understanding of the process and the resulting surface integrity. A parameter study with a profile sinusoidal (PPS) and an areal crossed sinusoidal (ACS) material measure of ISO 25178-70 is conducted. The different geometries are manufactured with a micro-milling process and several control data parameters such as the discretization of the tool path and the tilt angle are varied for different tools in order to achieve a systematic description of their effects on the resulting surface topography.

关键词： micro-manufacturing milling material measures

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Design of a fiber-Optic interrogator module for telecommunication satellites: Radiation test results of optical components

Design of a fiber-Optic interrogator module for telecommunic...

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International Conference on Space Optics 2012, ICSO 2012

作者： Putzer, Philipp Koch, Alexander W. Plattner, Markus Hurni, Andreas Manhart, Markus Institute of Measurement Systems and Sensor Technology Technische Universität München Munich Germany Kayser-Threde GmbH Munich Germany

ISBN: (纸本)9781510616172

In this paper we present the results of the radiation tests performed on the optical components of the fiber-optic interrogator module as a part of the Hybrid sensor Bus (HSB) system. The HSB-system is developed in the frame of an ESA-ARTES program and will be verified as flight demonstrator onboard the German Heinrich Hertz satellite in 2016. The HSB system is based on a modular concept which includes sensor interrogation modules based on I2C electrical and fiber Bragg grating (FBG) fiber-optical sensor elements. Onboard fiber-optic sensing allows the implementation of novel control and monitoring methods. For read-out of multiple FBG sensors, a design based on a tunable laser diode as well as a design based on a spectrometer is considered. The expected and tested total ionizing dose (TID) applicable to the HSB system is in the range between 100 krad and 300 krad inside the satellite in the geostationary orbit over a life time of 15 years. We present radiation test results carried out on critical optical components to be used in the fiber-optic interrogation module. These components are a modulated grating Y-branch (MGY) tunable laser diode acting as light source for the tuning laser approach, the line detector of a spectrometer, photodetectors and the FBG sensors acting as sensor elements. A detailed literature inquiry of radiation effects on optical fibers and FBG sensors, is also included in the paper. The fiber-optic interrogator module implemented in the HSB system is based on the most suitable technology, which sustains the harsh environment in the geostationary orbit. © 2012 ESA and CNES.

关键词： Radiation effects

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A versatile fibre optic sensor interrogation system for the Ariane Launcher based on an electro-optically tuneable laser diode

A versatile fibre optic sensor interrogation system for the ...

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International Conference on Space Optics 2008, ICSO 2008

作者： Plattner, M.P. Hirth, F. Müller, M.S. Hoffmann, L. Buck, T.C. Koch, A.W. Technische Universität München Institute for Measurement Systems and Sensor Technology Theresienstr. 90 München80333 Germany

ISBN: (纸本)9781510616219

Availability of reliable flight sensor data and knowledge of the structural behaviour are essential for safe operation of the Ariane launcher. The Ariane launcher is currently monitored by hundreds of electric sensors during test and qualification. Fibre optic sensors are regarded as a potential technique to overcome limitations of recent monitoring systems for the Ariane launcher [1]. These limitations include cumbersome application of sensors and harness as well as a very limited degree of distributed sensing capability. But, in order to exploit the various advantages of fibre optic sensors (high degree of multiplexing, distributed sensing capability, lower mass impact, etc.) dedicated measurement systems have to be developed and investigated. State-of-the-art fibre optic measurement systems often use free beam setups making them bulky and sensitive to vibration impact. Therefore a new measurement system is developed as part of the ESAstudy [2]. © 2017 ESA and CNES.

关键词： Fiber optic sensors

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A GaN 500 kHz High Current Active Clamp Phase-Shifted Full-Bridge Converter with Zero-Voltage Switching over the Entire Line and Load Range

A GaN 500 kHz High Current Active Clamp Phase-Shifted Full-B...

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European Conference on Power Electronics and Applications

作者： Martin Heintze Stefan Butzmann Robert Bosch GmbH Germany University of Wuppertal Sensor Technology and Measurement-Technology Systems Campus Freudenberg Germany

A GaN Active Clamp Phase-Shifted Full-bridge (PSFB) is introduced which enables zero-voltage switching (ZVS) over entire load and voltage range without any additional auxiliary circuit elements. For high load operation ZVS is achieved through a small leakage inductance as in conventional PSFB converters. To expand the ZVS range to zero load conditions the ripple current of the current doubler inductor in conjunction with an increased magnetizing current of the main transformer is used to obtain ZVS in every operating point. A secondary active clamp circuit limits the over-voltage of the current doubler rectifier. The ZVS mechanism is discussed in detail and some design tradeoffs are highlighted. The ability of the proposed circuit is demonstrated using a 1.5 kW, 400 V to 12 V DC/DC converter for automotive application with a wide voltage and power range. The small leakage inductance together with the ability to realize soft switching even under low load conditions enables a significant increase of the switching frequency up to 500 kHz and thus a remarkable increase of power density with very high efficiency.

关键词： Automotive application Automotive electronics Circuits Converter circuit DC power supply Design Efficiency Electric vehicle Energy Converters for HEV Gallium Nitride (GaN) High frequency power converter High power density systems Hybrid Electric Vehicle (HEV) Modulation strategy Power converters for EV Power converters for HEV Power supply Resonant converter Soft switching Switched-mode power supply Wide bandgap devices ZVS converters

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Development of fiber optic sensing interrogators for launchers

Development of fiber optic sensing interrogators for launche...

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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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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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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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Investigation of the propagation of measurement uncertainty in two-step method 18

Investigation of the propagation of measurement uncertainty ...

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18th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2018

作者： Shi, Shengyu Kuschmierz, Robert Czarske, Jürgen Qu, Jinping Zhang, Hao Lin, Jing Key Laboratory of Polymer Processing Engineering of Ministry of Education National Engineering Research Center of Novel Equipment for Polymer Processing School of Mechanical and Automobile Engineering South China University of Technology Guangzhou510640 China Laboratory for Measurement and Sensor System Techniques Technische Universitat Dresden Dresden01069 Germany State Key Laboratory for Manufacturing System Engineering School of Mechanical Engineering Xi'an Jiaotong University Xi'an710049 China School of Reliability and Systems Engineering Beihang University Xueyuan Road No. 37 Haidian District Beijing China

ISBN: (纸本)9780995775121

The multi-step method is one of the most classical error separation techniques capable of recovering the spindle error and the roundness error from the composite probe signals. However, its accuracy decreases due to the harmonic suppression problem (HSP). Increasing the number of measurements can reduce the suppressed harmonics, but leads to lengthy measurement procedure. For simplifying the measurement procedure, the two-step method (TSM) was proposed by utilizing the harmonic calculation. Unfortunately, TSM is also subject to HSP. Hence, the focus of this paper is to reveal the mechanism of HSP in TSM, from the perspective of propagation of measurement uncertainty. To achieve this aim, first, a Laplace Transform based algorithm for TSM is proposed. Then, the system model is developed in accordance to the algorithm, and subsequently, the propagation of measurement uncertainty in TSM is theoretically analysed. Ultimately, Monte Carlo simulations are carried out for verification. © 2018 CURRAN-CONFERENCE. All rights reserved.

关键词： Laplace transforms

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