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

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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Ultrasound flow mapping for the investigation of crystal growth

Ultrasound flow mapping for the investigation of crystal gro...

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IEEE Symposium (IUS) Ultrasonics

作者： N. Thieme R. Nauber H. Beyer L. Büttner J. Czarske P. Bönisch K. Dadzis L. Sylla D. Meier O. Pätzold Laboratory for Measurement and Sensor System Techniques Dresden University of Technology Dresden Germany SolarWorld Innovations GmbH Freiberg Germany Institute of Nonferrous Metallurgy and Purest Materials Freiberg University of Mining and Technology Freiberg Germany

The production of high quality solar cells requires a deep understanding of the solidification process. Especially when time-dependent magnetic fields are used to improve the material and heat transfer in the melt, the resulting flow structures are complex and unsteady. Hence, numerical simulations are used to gain an insight into the melt flow. For the calibration of the numerical simulations, model experiments using liquid metals at room temperature are used. The melt flow is strongly influenced by the melt height, that constantly decreases during a solidification process. Hence, measuring the position and the shape of the solidification front is required for an understanding of the melt flow. Furthermore a comprehensive flow mapping of complex and unsteady flow phenomena is necessary. Commercial flow instrumentation systems usually utilize only one or a few single element probes that are operated strictly in sequential multiplex. This leads to low frame rates and limits their application to quasi-static flow fields.

关键词： Arrays Ultrasonic imaging Ultrasonic variables measurement Numerical models Transducers Field programmable gate arrays Temperature measurement

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Evaluation of Time-Gated Fluorescence Spectroscopy for the Classification of Fluorescently Labeled Plastics

Evaluation of Time-Gated Fluorescence Spectroscopy for the C...

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IEEE International Instrumentation and measurement technology Conference

作者： Petr Fomin Siegfried Brunner Christian Kargel Institute for Measurement and Automation Division of Sensor Technology and Measurement Systems Bundeswehr University Munich Werner-Heisenberg-Weg 39 85579 Neubiberg Germany

ISBN: (纸本)9781479961153

The automated recycling of plastics becomes increasingly attractive from both the economical and environmental point of view. Yet in applications where plastic parts with high quality are required, recycled plastic materials cannot be employed at present because waste plastics of different kind are usually mixed during the recycling process. In order to produce the necessary mono-fractional compositions of waste plastics, a highly reliable sorting method before recycling is of paramount importance. We have been investigating the promising approach of labeling virgin plastics with specifically designed fluorescent tracers ("markers") in earlier studies [1]-[3]. Despite all the advantages of this approach compared to other techniques, the overlap of the tracers' fluorescence with the intrinsic autofluorescence plastic polymers might show is quite challenging in terms of a highly reliable classification. In this study we compare steady-state spectroscopy so far implemented in our sorting system prototype with time-gated fluorescence spectroscopy based upon their classification performances. As it turns out, the steady-state approach delivers acceptable performance only at rather high signal-to-noise ratios (S/N) when pronounced autofluorescence is present. Such S/N levels might be hard to achieve in practice. The time-gated approach on the other hand can completely eliminate the intrinsic autofluorescence from the measured spectra at the cost of moderately decreasing the signal-to-noise ratio. As long as these S/N values are larger than about +10 dB, ideal classification results of F_1-score = 100% can be achieved in practice for the application at hand.

关键词： Plastics Fluorescence Spectroscopy fluorescence emission spectroscopy plastic waste signal to noise ratios Plastics recycling autofluorescence Recycling Plastic parts fluorescent tracers Tin supernovas Hand

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Design of a chromatic fringe projector for 3D object reconstruction

Design of a chromatic fringe projector for 3D object reconst...

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7th International Workshop on Advanced Optical Imaging and Metrology, Fringe 2013

作者： Torner, Francoise Seewig, Jörg Fahlbusch, Thomas Beichert, Günter Böttner, Thomas Institute for Measurement and Sensor Technology Technical University of Kaiserslautern Gottlieb-Daimler-Straße D-67663 Kaiserslautern Germany PhotonicNet GmbH Garbsener Landstraße 10 D-30419 Hannover Germany Holo-Support Turmstraße 17 D-30982 Pattensen Germany Dyadic Computing Gmbh Brandstraße 20 D-30169 Hannover Germany

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Investigation of uorescence spectra disturbances inuencing the classification performance of uorescently labeled plastic akes

Investigation of uorescence spectra disturbances inuencing t...

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Videometrics, Range Imaging, and Applications XII;and Automated Visual Inspection

作者： Fomin, Petr Brunner, Siegfried Kargel, Christian Institute for Measurement and Automation Division of Sensor Technology and Measurement Systems Bundeswehr University Munich Werner-Heisenberg-Weg 39 85579 Neubiberg Germany

ISBN: (纸本)9780819496072

The recycling of plastic products becomes increasingly attractive not only from an environmental point of view, but also economically. For recycled (engineering) plastic products with the highest possible quality, plastic sorting technologies must provide clean and virtually mono-fractional compositions from a mixture of many different types of (shredded) plastics. In order to put this high quality sorting into practice, the labeling of virgin plastics with specific uorescent markers at very low concentrations (ppm level or less) during their manufacturing process is proposed. The emitted uorescence spectra represent \optical fingerprints - each being unique for a particular plastic - which we use for plastic identification and classification purposes. In this study we quantify the classification performance using our prototype measurement system and 15 different plastic types when various inuence factors most relevant in practice cause disturbances of the uorescence spectra emitted from the labeled plastics. The results of these investigations help optimize the development and incorporation of appropriate uorescent markers as well as the classification algorithms and overall measurement system in order to achieve the lowest possible classification error rates. © 2013 SPIE.

关键词： Plastic recycling

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A space-borne fiber-optic interrogator module based on a narrow-band tunable laser doide for temperature monitoring in telecommunication satellites

A space-borne fiber-optic interrogator module based on a nar...

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Optical measurement Systems for Industrial Inspection VIII

作者： Putzer, P. Kuhenuri, N. Koch, A.W. Schweyer, S. Hurni, A. Plattner, M. Institute for Measurement Systems and Sensor Technology Technische Universität München Theresienstr. 90/N5 Munich Germany Kayser-Threde GmbH Wolfratshauser Str. 48 Munich Germany

ISBN: (纸本)9780819496041

In this paper measurement results of the fiber-optic interrogator module for telecommunication satellite applications are presented. The sensor interrogator features from fiber Bragg grating (FBG) based sensing. Benefits are intrinsic sensor distribution capability and the possibility to embed optical fibers in composite structures like tanks and satellite panels. The fiber-optic interrogator module is based on a narrow-band monolithic laser diode where the output wavelength is spectrally tuned by electric control signals. By evaluating the intensities of the sensor response, the peak of the FBG can be monitored. The correct evaluation of the sensor response is a challenging task, therefore different computational methods are presented, namely centroid, finite impulse response filter and curve fitting algorithms. The algorithms shall met the performance requirements in terms of measurement accuracy, robustness against laser degradation and measurement rate. Furthermore the algorithms shall be implemented in an FPGA, which means a detailed point of view to fixed-point arithmetic and necessary amount of hardware resources at constant performance. measurement results based on the different FBG evaluation algorithms are presented and traded regarding accuracy robustness and their possible implementation in an FPGA. © 2013 SPIE.

关键词： Fiber Bragg gratings

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Experimental investigation of the stiffness of planar ball guides 12

Experimental investigation of the stiffness of planar ball g...

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12th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2012

作者： Heyne, M. Balzer, F. Theska, R. Institute of Design and Precision Engineering Ilmenau University of Technology Germany Institute of Process Measurement and Sensor Technology Ilmenau University of Technology Germany

ISBN: (纸本)9780956679000

One important aim of precision planar ball guides design is a high stiffness. A mathematical appropriate design allows the deployment of three balls only. In order to fulfil the load and stiffness requirements of the guide a much higher number of balls is used. In this overconstrained situation the stiffness is reduced by an unknown value compared to the calculated theoretical result due to manufacturing deviations. The following contribution presents an experimental investigation of planar guides concerning their stiffness.

关键词： Stiffness

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Material characterisation of nano scale solid state electrolytes

Material characterisation of nano scale solid state electrol...

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International Workshop on Impedance Spectroscopy, IWIS 2011

作者： Wendler, Frank Freund, Markus Kanoun, Olfa Schadewald, Jörg Bufon, Carlos Cesar Bof Schmidt, Oliver G. Chemnitz University of Technology Measurement and Sensor Technology Chemnitz Germany Institute for Integrative Nanosciences IFW Dresden Dresden Germany

ISBN: (纸本)9780415644303

Impedance spectroscopy is widely used in material characterization and characterization of energy storage devices. In material analysis the specific properties of macro scale samples are in focus of investigation. However, the characteristic properties obtained with bulk measurements can differ from those measured at thin films. In the field of energy storage devices impedance spectroscopy is used to find parameter sets for modeling the individual storage behavior. Here the dimension of the device are of little interest. The combination of material as well as storage behavior characterization can be used in the case of chip level energy storage devices. For this, test structures are measured over a wide frequency range and analyzed via model based approach. With this process dielectric, resistive and electrochemical effects can be separated and analyzed in a quantitative way. The procedure was tested on nanometer range thin films of the solid state electrolyte LiPON based capacitors. Precise measurement of the energy storage material characteristics can support further optimization of the storage material and production processes. © 2012 Taylor & Francis Group.

关键词： Thin films

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Application of a novel fibre-coupled confocal sensor in a nanopositioning and nanomeasuring machine 12

Application of a novel fibre-coupled confocal sensor in a na...

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12th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2012

作者： Balzer, F.G. Gerhardt, U. Hausotte, T. Albrecht, K. Manske, E. Jäger, G. Ilmenau University of Technology Institute of Process Measurement and Sensor Technology Germany Department of Manufacturing Metrology University Erlangen-Nuremberg Germany

ISBN: (纸本)9780956679000

This article introduces a novel fibre-coupled confocal sensor for optical, non-tactile measurement of microstructures developed at the institute of Process measurement and sensor technology. The functional principle and an analysis of its metrological properties as well as some experimental results using the NMM-1, a nanopositioning and nanomeasuring machine (NPMM) manufactured by SIOS Meßtechnik GmbH, are presented.

关键词： Nanotechnology

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High speed temperature sensors in emission systems of combustion engines

High speed temperature sensors in emission systems of combus...

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20th IMEKO World Congress 2012

作者： Augustin, S. Fröhlich, F. Ament, C. Güther, T. Institute for Process Measurement and Sensor Technology Ilmenau University of Technology Ilmenau Germany Department of System Analysis Ilmenau University of Technology Ilmenau Germany

ISBN: (纸本)9781627481908

Temperature sensors used in emission systems of combustion engines must register enormous temperature differences within the shortest periods of time. This serves to protect the engine parts with respect to their temperature stability and to govern the energy efficient functioning of the engine. Numerical calculations according to the Finite Elements Method are used to estimate static-thermal measurement errors and dynamic characteristics primarily concerning medium specificity and construction of the temperature sensors. Prediction models are used to correct the dynamic behavior and to predict the medium temperature faster accurately. Copyright © (2012) by the International measurement Federation (IMEKO).

关键词： Forecasting

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