{"title":"Experimental characterization of a non linear electrostatic quadripole: application to insulated gate power components","authors":"Yves Lembeye, J. Keradec, J. L. Schanen","doi":"10.1109/IMTC.1998.679843","DOIUrl":"https://doi.org/10.1109/IMTC.1998.679843","url":null,"abstract":"Switching of insulated gate semiconductors (MOSFET, IGBT, ...) is dominated by electrostatic properties. Unfortunately, current manufacturer datasheets do not include relevant information to accurately forecast transients waveforms. First, a non linear electrostatic quadripole is studied from a theoretical point of view. This short but rigorous analysis allows the reader to understand why supplied data are not relevant. Second, a novel method of experimental characterisation is proposed. It leads to a more complete description of the electrostatic behaviour of such a component. Finally, transient waveforms are acquired on a simple circuit including a switch and they are compared to simulated ones. Benefit of the improved characterisation, then, becomes obvious.","PeriodicalId":160058,"journal":{"name":"IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (Cat. No.98CH36222)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117275866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Electrical current sensors based on transparent magnets","authors":"Y. Didosyan, H. Hauser, J. Nicolics, P. Fulmek","doi":"10.1109/IMTC.1998.676869","DOIUrl":"https://doi.org/10.1109/IMTC.1998.676869","url":null,"abstract":"A brief review of the latest developments on optical current measurements based on the Faraday effect is presented. In all existing magnetooptical current transformers the main measured parameter is the polarization state of the light transmitted by a sensor element. A new transformer in which the measured parameter is the geometrical position of the boundary between domains with opposite magnetizations is described. In a wide frequency band, including dc currents, the measurement results are a linear function of the measured current and are not affected by temperature changes and mechanical factors.","PeriodicalId":160058,"journal":{"name":"IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (Cat. No.98CH36222)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121266200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Pathare, R. Gao, B. Varghese, Changsheng Guo, S. Malkin
{"title":"A DSP-based telemetric data acquisition system for in-process monitoring of grinding operation","authors":"S. Pathare, R. Gao, B. Varghese, Changsheng Guo, S. Malkin","doi":"10.1109/IMTC.1998.679753","DOIUrl":"https://doi.org/10.1109/IMTC.1998.679753","url":null,"abstract":"A low power telemetric data acquisition and processing system is presented. The system, built around a Digital Signal Processor (DSP) TMS320C542, is designed to be structurally integrated into a grinding wheel of about 35 cm (14\") in diameter. A total of fifteen force and acoustic emission sensors are being embedded in the wheel structure to monitor the wheel-workpiece interaction during the grinding operation. To enable on-line, in-process wheel operation monitoring, the system contains an RF-telemetric data transmission module that operates in the 900 MHz ISM band. The entire system is designed to operate on a 6V-battery, with a total supply current less than 150 mA.","PeriodicalId":160058,"journal":{"name":"IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (Cat. No.98CH36222)","volume":"285 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116105357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Proposal to design a new microprocessor to fuzzy logic control","authors":"F. Quiroz, E.R. Escobar, J. Rodriguez","doi":"10.1109/IMTC.1998.679791","DOIUrl":"https://doi.org/10.1109/IMTC.1998.679791","url":null,"abstract":"This paper is the result of a previous research work, which was an approach to the problem of the optical disc reproducers tracking system, throughout fuzzy logic control \"F.L.C.\", getting a digital logic circuit that can work like a fuzzy logic microprocessor.","PeriodicalId":160058,"journal":{"name":"IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (Cat. No.98CH36222)","volume":"351 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122337377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Metrological characterization of a novel absolute distance meter based on dispersive comb-spectrum interferometry","authors":"U. Minoni, L. Rovati, M. Bonardi, F. Docchio","doi":"10.1109/IMTC.1998.676901","DOIUrl":"https://doi.org/10.1109/IMTC.1998.676901","url":null,"abstract":"The paper reports results of an investigation on the main measurement uncertainty sources in a novel distance meter based on dispersive comb-spectrum interferometry. The light source is a commercial laser diode operating at 670 nm driven ender the threshold condition, and emitting a beam with a comb-shaped spectrum. Sensitivity of the measurement to the operating conditions has been evaluated. Results from an experimental activity aimed at characterizing the laser and to measure the performance of a prototype implementation are also presented. The system is suitable to perform unambiguous non-incremental distance measurements over a range of 0.8 mm with a total uncertainty of about 1.5 /spl mu/m.","PeriodicalId":160058,"journal":{"name":"IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (Cat. No.98CH36222)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114521957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design of broadband excitation signals with a user imposed power spectrum and amplitude distribution","authors":"J. Schoukens, T. Dobrowiecki","doi":"10.1109/IMTC.1998.676874","DOIUrl":"https://doi.org/10.1109/IMTC.1998.676874","url":null,"abstract":"This paper presents a method to design broadband excitation signals with a user imposed power spectrum and amplitude distribution. If necessary, the crest factor can also be reduced by setting a don't care region at the tails of the desired amplitude density function.","PeriodicalId":160058,"journal":{"name":"IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (Cat. No.98CH36222)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122202500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Incorporating dynamic sensing in virtual environment for robotic tasks","authors":"Y.F. Li, J.G. Wang","doi":"10.1109/IMTC.1998.679734","DOIUrl":"https://doi.org/10.1109/IMTC.1998.679734","url":null,"abstract":"Many robotic tasks involve dynamic interactions between the work piece and handling device, in which sensory information constitutes an indispensable part of the task. It is therefore of practical interests to incorporate sensor modules in the simulation stage to provide a more realistic preview of the operations and predict the behaviors of the components prior to the implementation on a real work cell. Most of the current Virtual Reality (VR) systems use geometric models and sensor-less robots for simulation, which cannot provide the insights into the real behaviors of the work cell components. In this paper, we report our work in studying the issues related to simulated sensors for dynamic interactions in Virtual Environment (VE) using physics based models. Based on previous development, a simplified force sensor is modeled and simulated. The current implementation was carried out on an PC based VR platform, with the low level programs developed using C++ via the system's development interface.","PeriodicalId":160058,"journal":{"name":"IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (Cat. No.98CH36222)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128376970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The thin dielectric film capacitive displacement transducer to nanometer","authors":"F. Castelli","doi":"10.1109/IMTC.1998.679742","DOIUrl":"https://doi.org/10.1109/IMTC.1998.679742","url":null,"abstract":"The paper reviews the use of transducers for small displacements (from micrometers to few millimeters) and the advantages of capacitive transducers over other transducers types, and discusses the basic principle of two new transducers de-noted \"thin dielectric film capacitive transducer\" (TFCT). This principle is based on the properties of a very thin dielectric film between the faced electrodes. The film may be applied, when featured with thickness (TH) TH<1 /spl mu/m, by metallic dielectric, such as allumina, either in gas phase or by electrolysis deposited form. The transducers are designed in a differential form. Two implementation prototypes (IPs) have been designed. The first one (I/spl deg/IP) have been constructed for both linear and rotary displacement transducers by a dielectric spray varnish with TH/spl cong/2 /spl mu/m. In the second one (II/spl deg/IP), in course of construction, a linear displacement transducer has been designed, by a metallic dielectric of allumina deposited by electrolysis with TH/spl cong/510/sup -2/ /spl mu/m. The test results obtained on the I/spl deg/IP and, on this basis previewed for the II/spl deg/IP are critically analyzed. The sensitivity (S) and linearity (L) in ppm detected and previewed respectively are 5 pF/mm, 0.6 pF//spl deg/ and 25; /spl cong/40 pF//spl mu/m and <1; the features for pursuing an L<0.1 ppm are illustrated as well. Based on these previewed results an absolute both scale of capacitance and capacitive voltage divider are proposed as well.","PeriodicalId":160058,"journal":{"name":"IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (Cat. No.98CH36222)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129349006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yan Xu, Changsheng Xu, Yingli Tian, Songde Ma, Man Luo
{"title":"3D face image acquisition and reconstruction system","authors":"Yan Xu, Changsheng Xu, Yingli Tian, Songde Ma, Man Luo","doi":"10.1109/IMTC.1998.676898","DOIUrl":"https://doi.org/10.1109/IMTC.1998.676898","url":null,"abstract":"This paper deals with a high speed rangefinder to acquire accurate range data of human face and reconstruct 3D face image with high quality. The system is based on laser active triangulation principle. A laser projector emits a laser stripe on human face and two cameras detect it. A transformation matrix is related to the transformation between the laser image in the camera and the related absolute position in space. We use two cameras to solve the missing parts problem and register the gray scale image with range data to reconstruct 3D image with high quality. Theoretical analysis and practical system are described. Experimental results show that this system can reconstruct 3D face image with high measuring speed and accuracy. This system can be applied in medical fields for doctor to acquire and measure the 3D data of patient's face and design the face orthopedic surgery.","PeriodicalId":160058,"journal":{"name":"IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (Cat. No.98CH36222)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130557845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A high performance frequency insensitive quadrature phase shifter and its application in reactive power measurements","authors":"B. Djokic, E. So, P. Bosnjakovic","doi":"10.1109/IMTC.1998.676837","DOIUrl":"https://doi.org/10.1109/IMTC.1998.676837","url":null,"abstract":"This paper describes a high precision circuit for quadrature phase shifting in which frequency controlled signal amplification is introduced so that the amplitude of the phase shifted signal is not dependent on the frequency of the input signal. The implementation of the proposed quadrature phase shifter is aimed at high accuracy reactive power measurements in AC power systems. The implementation of the new phase shifter effectively reduces var/varh measurements to watt/watthour measurements. A prototype has been built and the test results are presented.","PeriodicalId":160058,"journal":{"name":"IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (Cat. No.98CH36222)","volume":"21 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129126877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}