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IEEE Instrumentation and measurement technology Conference

作者： Bernhard Schweighofer Hannes Wegleiter Manes Recheis Paul Fulmek Institute of Electrical Measurement and Measurement Signal Processing Graz University of Technology Graz Austria Institute of Sensor and Actuator Systems University of Technology Vienna Vienna Austria

The need to reduce fuel consumption, minimize emissions, and improve levels of safety, comfort, and reliability is expected to result in a much higher demand for electric power in future cars. In order to develop the needed control algorithms and to optimize the required components some kind of virtual prototype environment is needed. Even so for most components good models already exist, an adequate model for the battery is still missing. However, this is needed since the battery has a large impact on the efficiency of the total system. Therefore this work presents a battery model applicable for EV and HEV simulations.

关键词： Batteries Battery charge measurement Current measurement System-on-a-chip Discharges (electric) Temperature measurement Indexes

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measurement and analysis of near infrared spectrum of gasoline vapor

Measurement and analysis of near infrared spectrum of gasoli...

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2012 International Meeting on Opto-Electronics Engineering and Materials Research, OEMR 2012

作者： Yan, Li-ping Li, Shu Luo, Lai-gen Zhang, Min Dong, Jing-xin State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instruments and Mechanology Tsinghua University Beijing 100084 China Beijing POL Institute Beijing 102300 China Optical Fiber Sensor Lab Department of Electronic Engineering Tsinghua University Beijing 100084 China

ISBN: (纸本)9783037854884

In the fiber-sensing gas detection system, characteristic of near infrared absorption spectrum of the detected gas is greatly significant. The volatilized gasoline vapor is a mixture rich in various components, of which near infrared absorption spectrum shall be determined by means of experimental measurement. In this paper, an experimental platform is constructed by analyzing absorption characteristic of liquid composition in gasoline within the range of near infrared spectrum, which achieves measurement of the volatilized gasoline vapor with different concentration. In addition, reliability of this measurement method is inspected, a comparison between features of absorption spectrograms of liquid and gas is made, and linear relation of absorbance and concentration of gasoline vapor is verified. The result shows that the experimental data is acceptable and may be used as the basis of further analysis and for design of the online detecting system of gasoline vapor concentration in the hazardous environment. © (2012) Trans Tech Publications, Switzerland.

关键词： Absorbance

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Lorentz Force Velocimetry for Poorly Conducting Fluids- Development and Validation of a Novel Flow Rate measurement Device

Lorentz Force Velocimetry for Poorly Conducting Fluids- Deve...

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第七届冶金与材料电磁过程国际会议（EPM2012）

作者： WEGFRASS Andre RESAGK Christian DIETHOLD Christian FROHLICH Thomas WERNER Michael HALBEDEL Bernd THESS Andre Institute of Thermodynamics and Fluid Mechanics Department of Mechanical EngineeringIlmenau University of Technology Institute of Process Measurement and Sensor Technology Department of Mechanical EngineeringIlmenau University of Technology Institute of Inorganic-nonmetallic Materials Department of Mechanical EngineeringIlmenau University of Technology

The paper demonstrated the feasibihty of Lorentz Force Velocimetry for flow rate measurements of weakly conducting electrolytes using experimental results on salt water flow exposed to a permanent magnet *** innovative flow measurement technique allows the non-contact determination of flow rates and relies on the interaction between a magnetic field and a moving conducting *** an electrically conducting fluid moves through the magnetic field a Lorentz force is generated and acts on the measurement *** present report provides an overview about the experimental setups and the first measurement results.

关键词： Lorentz force velocimetry flow measurement electrolytes non-contact measurement

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Surface and coordinate measurements with nanomeasuring machines

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International Journal of Nanomanufacturing 2012年第5-6期8卷 467-483页

作者： Hausotte, Tino Balzer, Felix-Gerhard Vorbringer-Dorozhovets, Nataliya Manske, Eberhard Manufacturing Metrology University Erlangen-Nuremberg Naegelsbachstrasse 25 D-91052 Erlangen Germany Institute of Process Measurement and Sensor Technology Ilmenau University of Technology P.O. Box 100 565 D-98684 Ilmenau Germany

The nanomeasuring machine (NMM-1) was designed for surface and coordinate measurements within a measurement volume of 25 mm × 25 mm × 5 mm. The machine is equipped with three homodyne plane-mirror miniature interferometers for the measurement of the displacement of a movable corner mirror. The object being measured is placed on the corner mirror, which is positioned by a three-axis drive system. Various measurement tasks are possible depending on the probe system installed. Most of the sensors utilised are one-dimensional tactile or optical surface sensors or probes. In recent years, measurements of three-dimensional features and sidewalls are becoming more important. For these more complex measurements, probe systems with two or three directions of sensitivity are necessary and were therefore integrated into the NMM-1. The article gives an overview of the operation and properties of the NMM-1, its use for surface and coordinate measurements, of integrated probe systems and of two probing systems developed. Copyright © 2013 Inderscience Enterprises Ltd.

关键词： Interferometers

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Impedance spectroscopy in solid state electrolyte characterization

Impedance spectroscopy in solid state electrolyte characteri...

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

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

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.

关键词： Impedance Mathematical model Electrodes Integrated circuit modeling Frequency measurement Materials Lithium

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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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Automatic antenna tuning unit to improve RFID system performance

Automatic antenna tuning unit to improve RFID system perform...

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作者： Wegleiter, Hannes Schweighofer, Bernhard Deinhammer, Christian Holler, Gert Fulmek, Paul Institute of Electrical Measurement and Measurement Signal Processing Graz University of Technology 8010 Graz Austria Institute of Sensor and Actuator Systems Vienna University of Technology 1040 Vienna Austria

Systems for radio-frequency identification (RFID) realize a bidirectional wireless communication between a reader device and cheap passive tags (e.g., an RFID chip with an antenna printed on badges for access-control systems) in the near field of an antenna. This paper deals with the automatic and fast tuning of the resonant reader antennas in the widely used 13.56-MHz frequency band, resulting in a performance improvement and an increased read/write range. A novel RFID reader system is proposed with a tuning transformer for the automatic adjustment of the resonant circuit center frequency. This is achieved by shifting the magnetic operating point (i.e., the biasing direct-current (dc) magnetization) of a Ni-Zn ferrite transformer by means of an additional dc winding. The operation principle and the performance potential of this device are demonstrated by measurements on a prototypical RFID system. © 2011 IEEE.

关键词： Magnetism

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Design and evaluation of a portable device for the measurement of bio-impedance-cardiograph

Design and evaluation of a portable device for the measureme...

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International Workshop on Impedance Spectroscopy

作者： Shi, Qinghai Heinig, Andreas Kanoun, Olfa Department for Measurement and Sensor Technology Chemnitz University of Technology Chemnitz Germany Lifetronics Fraunhofer Institute for Photonic Microsystems Dresden Germany

ISBN: (纸本)9780415684057

Electrical impedance of biological matter is known as electrical bio-impedance or simply as bio-impedance. Bio-impedance devices are of great value for monitoring the pathological and physiological status of biological tissues in clinical and home environments. The technological progress in instrumentation has significantly contributed to the progress that has been observed during the last past decades in impedance spectroscopy and electrical impedance cardiograph. Although bio-impedance is not a physiological parameter, the method enables tissue characterization and functional monitoring and can contribute to the monitoring of the health status of a person. In this paper an inexpensive portable multi frequency impedance cardiograph device based on impedance spectroscopy technique has been developed. By means of this system the basic thoracic impedance range and the heart-actioncaused changes of impedance can be measured and the hemodynamic parameters of the heart function can be determined. This system has small size and low current consumption. The impedance cardiograph signals of the electrodes configuration by Sramek, Penney and Qu in this work was measured;compared and summarized. The differences of the measuring method, the schematic circuit diagram, the measurement results and area of application between impedance cardiograph and impedance spectroscopy were discussed and compared. The performance of this sensor-system was evaluated. © 2011 Taylor & Francis Group, London.

关键词： Electrocardiography

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Iteration methods to precisely locate edges of hot objects using simple infrared-sensing elements

Iteration methods to precisely locate edges of hot objects u...

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作者： Rupitsch, Stefan J. Zagar, Bernhard G. Friedrich-Alexander University Erlangen-Nuremberg Department of Sensor Technology Erlangen Germany Institute for Measurement Technology Johannes Kepler University Linz Austria

This paper deals with novel mathematical methods to locate the edges of heated planar objects employing simple photodiodes. Thereby, both the lateral edge position and the axial distance of the object can be determined. Furthermore, a method which allows the estimation of the rotation angle of the investigated object is discussed. In contrast to an infrared camera, photodiodes and the required electronic components are insensitive to mechanical vibrations commonly experienced in industrial fabrication processes. Nevertheless, the limited spatial resolution of such photodiode ensemble demands for a signal-processing-based resolution enhancement, which is presented in this paper. By means of simulation results, the efficiency of the novel methods is verified. © 2010 IEEE.

关键词： Fabrication

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Analysis of the cosine error in measurements using the nanopositioning and nanomeasuring machine

Analysis of the cosine error in measurements using the nanop...

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26th Annual Meeting of the American Society for Precision Engineering, ASPE 2011

作者： Kreutzer, Philipp Füßl, Roland Manske, Eberhard University of Technology Ilmenau Institute of Process Measurement and Sensor Technology P.O: Box 100 565 D-98684 Ilmenau Germany

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