Pub Date : 2005-05-16DOI: 10.1109/IMTC.2005.1604082
A. M. McKee, R. Goubran
This paper compares two methods of source localization in the human thorax using a multisensor stethoscope. The multisensor stethoscope measurement technique consists of several stethoscope chest pieces simultaneously recording and storing audio data for computer-aided analysis. Localization method A finds the source location by measuring the relative power at different points in the field and identifying the location of maximum power. Localization method B finds the source by solving a system of equations based on the difference in time of arrival of signals at different microphones and the measured microphone positions. To illustrate this concept, a circular array of microphones equally spaced in one plane is assumed to be in a free-field homogeneous medium. Simulations, conducted in Matlab, as well as verification results are presented. Two in vitro verification models were constructed, and preliminary trials were done on a human test subject
{"title":"Sound Localization in the Human Thorax","authors":"A. M. McKee, R. Goubran","doi":"10.1109/IMTC.2005.1604082","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604082","url":null,"abstract":"This paper compares two methods of source localization in the human thorax using a multisensor stethoscope. The multisensor stethoscope measurement technique consists of several stethoscope chest pieces simultaneously recording and storing audio data for computer-aided analysis. Localization method A finds the source location by measuring the relative power at different points in the field and identifying the location of maximum power. Localization method B finds the source by solving a system of equations based on the difference in time of arrival of signals at different microphones and the measured microphone positions. To illustrate this concept, a circular array of microphones equally spaced in one plane is assumed to be in a free-field homogeneous medium. Simulations, conducted in Matlab, as well as verification results are presented. Two in vitro verification models were constructed, and preliminary trials were done on a human test subject","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125687922","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}
Pub Date : 2005-05-16DOI: 10.1109/IMTC.2005.1604346
S. Gilbert, R. Laganière, G. Roth
This paper presents a 3D pose estimation and reconstruction system based on a calibrated stereoscopic vision setup. The proposed approach consists in robustly tracking the movements of the cameras with respect to a rigid scene along a sequence. In addition, a novel correction scheme is proposed, that compensates for the accumulated error in the computed positions, exploiting the detection of loops in the movement. Experiments are presented to assess the accuracy of the resulting 3D measurements
{"title":"Stereo Motion from Feature Matching and Tracking","authors":"S. Gilbert, R. Laganière, G. Roth","doi":"10.1109/IMTC.2005.1604346","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604346","url":null,"abstract":"This paper presents a 3D pose estimation and reconstruction system based on a calibrated stereoscopic vision setup. The proposed approach consists in robustly tracking the movements of the cameras with respect to a rigid scene along a sequence. In addition, a novel correction scheme is proposed, that compensates for the accumulated error in the computed positions, exploiting the detection of loops in the movement. Experiments are presented to assess the accuracy of the resulting 3D measurements","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132268159","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}
Pub Date : 2005-05-16DOI: 10.1109/IMTC.2005.1604184
D. Muñoz, S. C. Berga, C. R. Escriva, P. Freitas
Generalized impedance converters (GIC) are electronic circuits which have been widely used as controllable impedance in AC regime, especially in active filter synthesis. In the work presented, the GIC is used as a biasing circuit of a magnetoresistive current sensor (Wheatstone bridge) which is located inside the GIC itself. In this case, the GIC works under DC bias unlike its usual AC bias use
{"title":"Generalized Impedance Converter as a New Sensor Signal Conditioning Circuit","authors":"D. Muñoz, S. C. Berga, C. R. Escriva, P. Freitas","doi":"10.1109/IMTC.2005.1604184","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604184","url":null,"abstract":"Generalized impedance converters (GIC) are electronic circuits which have been widely used as controllable impedance in AC regime, especially in active filter synthesis. In the work presented, the GIC is used as a biasing circuit of a magnetoresistive current sensor (Wheatstone bridge) which is located inside the GIC itself. In this case, the GIC works under DC bias unlike its usual AC bias use","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"03 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128808870","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}
Pub Date : 2005-05-16DOI: 10.1109/IMTC.2005.1604531
J. Huang, C. Bi
The purpose of this paper is to demonstrate a method for runout measurement of hard disk drive spindle motor. This paper first reviews different technologies used for obtaining high precision micro motor runout measurement, and compares the limitation of several existed nanometer level measurement instruments that are used to measure spindle motor runout. An instrument based on optical vision sub-pixel image registration technology is thus developed for realizing high measuring accuracy, easy operation and low cost micro motor test. The experimental studies on different type micro motor are also presented
{"title":"Sub-pixel Image Registration Techniques for High Precision Micro Motor Runout Measurement","authors":"J. Huang, C. Bi","doi":"10.1109/IMTC.2005.1604531","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604531","url":null,"abstract":"The purpose of this paper is to demonstrate a method for runout measurement of hard disk drive spindle motor. This paper first reviews different technologies used for obtaining high precision micro motor runout measurement, and compares the limitation of several existed nanometer level measurement instruments that are used to measure spindle motor runout. An instrument based on optical vision sub-pixel image registration technology is thus developed for realizing high measuring accuracy, easy operation and low cost micro motor test. The experimental studies on different type micro motor are also presented","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121455637","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}
Pub Date : 2005-05-16DOI: 10.1109/IMTC.2005.1604341
M. Korczynski, A. Hetman, A. Hłobaż
The digital signal processing is a part of data handling so important in today's metrology. Teaching of digital signal processing is carried not only at the electrical and electronic-engineering departments as the most traditional interested in this subject but also others not only technical universities are carried lectures and tutorials. The authors are suggesting how to propose understanding the bases of digital signal processing. The virtual harmonic analyzer, which operates on simulated and real data, is a base. The presented virtual analyzer is a tool for analyzing of quality of electrical power from the point of view of harmonic constants. The proposal delivered here, tells not only how to tackle digital signal processing, but is a tool to identify problems while developing harmonic analyzers
{"title":"Virtual Laboratory a Key for Teaching Principles of Digital Signal Processing","authors":"M. Korczynski, A. Hetman, A. Hłobaż","doi":"10.1109/IMTC.2005.1604341","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604341","url":null,"abstract":"The digital signal processing is a part of data handling so important in today's metrology. Teaching of digital signal processing is carried not only at the electrical and electronic-engineering departments as the most traditional interested in this subject but also others not only technical universities are carried lectures and tutorials. The authors are suggesting how to propose understanding the bases of digital signal processing. The virtual harmonic analyzer, which operates on simulated and real data, is a base. The presented virtual analyzer is a tool for analyzing of quality of electrical power from the point of view of harmonic constants. The proposal delivered here, tells not only how to tackle digital signal processing, but is a tool to identify problems while developing harmonic analyzers","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"58-60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116257405","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}
Pub Date : 2005-05-16DOI: 10.1109/IMTC.2005.1604198
L. D. de Almeida, M. Fontana, F. A. Wegelin, L. Ferreira
On-load tap changers (OLTCs) are electromechanical devices used in the voltage regulation of the electrical networks. A non-invasive monitoring method was developed using discrete wavelet transform (DWT) for condition assessment of on-load tap-changers using vibration analysis signals. The transient vibration signals emitted during a tap change are recorded and processed using spectral analysis and standards recognition techniques. The monitoring systems which detect failure during the OLTC operation are quite complexes. In order to reduce this complexity, in this work we demonstrated a new approach based on DWT analysis. The proposed technique is presented and the experimental results as well as its simulation are discussed
{"title":"A New Approach for Condition Assessment of On-Load Tap-Changers using DiscreteWavelet Transform","authors":"L. D. de Almeida, M. Fontana, F. A. Wegelin, L. Ferreira","doi":"10.1109/IMTC.2005.1604198","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604198","url":null,"abstract":"On-load tap changers (OLTCs) are electromechanical devices used in the voltage regulation of the electrical networks. A non-invasive monitoring method was developed using discrete wavelet transform (DWT) for condition assessment of on-load tap-changers using vibration analysis signals. The transient vibration signals emitted during a tap change are recorded and processed using spectral analysis and standards recognition techniques. The monitoring systems which detect failure during the OLTC operation are quite complexes. In order to reduce this complexity, in this work we demonstrated a new approach based on DWT analysis. The proposed technique is presented and the experimental results as well as its simulation are discussed","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115642409","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}
Pub Date : 2005-05-16DOI: 10.1109/IMTC.2005.1604388
B. Andò
Electronic aids for the visually impaired represent a great opportunity for improving the life quality of this class of people. Many efforts have been dedicated to produce tools improving the mobility and the orientation for both indoor and outdoor application. However, many other aspects compromising the life quality of blind people must be taken into account. In particular, the interaction with the surroundings and the possibility to get as much information as possible are mandatory tasks. In this paper, a new multi-sensor tool is presented, which allows for the classification of home light. Low cost, reliability, optimal information degree and easy to use are the main features of the device, making the system competitive compared to other marketed devices
{"title":"An Environmental Sensor Providing Home Light Classification to Blind People","authors":"B. Andò","doi":"10.1109/IMTC.2005.1604388","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604388","url":null,"abstract":"Electronic aids for the visually impaired represent a great opportunity for improving the life quality of this class of people. Many efforts have been dedicated to produce tools improving the mobility and the orientation for both indoor and outdoor application. However, many other aspects compromising the life quality of blind people must be taken into account. In particular, the interaction with the surroundings and the possibility to get as much information as possible are mandatory tasks. In this paper, a new multi-sensor tool is presented, which allows for the classification of home light. Low cost, reliability, optimal information degree and easy to use are the main features of the device, making the system competitive compared to other marketed devices","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123775719","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}
Pub Date : 2005-05-16DOI: 10.1109/IMTC.2005.1604463
Xiaotao Wang, Yi Shen, Zhi-yan Liu, Qiang Wang
The spectrogram of Doppler ultrasound signal has been widely used in the clinical diagnosis. The additional frequency component arising from noise will produce an adverse effect on the subjective analysis of the spectrogram and its quantitative analysis. Two approaches based on the adaptive representations including the adapted local cosine transform (CPD) and the wavelet packet (WPD), combined with the garrote thresholding, and is proposed to denoising quadrature Doppler ultrasound signal. At first, to avoid the phase distortion induced by denoising the complex Doppler ultrasound signal directly, the directional information is extracted from the quadrature signal. And then the denoising methods based on the adaptive representations are performed on the forward and reverse flow signals, respectively. At last, the estimated signal is reconstructed from the denoised signals using Hilbert transform. The simulation results have shown that these approaches are superior to ones based on the wavelet transform, especially under low SNR circumstances, and moreover, the denoising method using the CPD has achieved the best performance
{"title":"Quadrature Doppler Ultrasound Signal Senoising Based on Adaptive Representations","authors":"Xiaotao Wang, Yi Shen, Zhi-yan Liu, Qiang Wang","doi":"10.1109/IMTC.2005.1604463","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604463","url":null,"abstract":"The spectrogram of Doppler ultrasound signal has been widely used in the clinical diagnosis. The additional frequency component arising from noise will produce an adverse effect on the subjective analysis of the spectrogram and its quantitative analysis. Two approaches based on the adaptive representations including the adapted local cosine transform (CPD) and the wavelet packet (WPD), combined with the garrote thresholding, and is proposed to denoising quadrature Doppler ultrasound signal. At first, to avoid the phase distortion induced by denoising the complex Doppler ultrasound signal directly, the directional information is extracted from the quadrature signal. And then the denoising methods based on the adaptive representations are performed on the forward and reverse flow signals, respectively. At last, the estimated signal is reconstructed from the denoised signals using Hilbert transform. The simulation results have shown that these approaches are superior to ones based on the wavelet transform, especially under low SNR circumstances, and moreover, the denoising method using the CPD has achieved the best performance","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121385146","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}
Pub Date : 2005-05-16DOI: 10.1109/IMTC.2005.1604315
S. Curletto, A. Trucco
A correct exploitation of the contrast agent previously injected inside the human body and the measurement of nonlinear responses generated by the bubbles that composing it need to an acoustic beam pressure having a quasi-constant profile in a fixed range of depths. In order to obtain this objective, a synthesis stochastic method (based on simulated annealing) aimed to the optimization of the weight coefficients to be applied to the array sensors has been developed and performed. The results obtained in terms of pressure profile and simulated echographic images have been reported and discussed
{"title":"Advanced generation of ultrasound beams for the measurement of the contrast agent responses","authors":"S. Curletto, A. Trucco","doi":"10.1109/IMTC.2005.1604315","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604315","url":null,"abstract":"A correct exploitation of the contrast agent previously injected inside the human body and the measurement of nonlinear responses generated by the bubbles that composing it need to an acoustic beam pressure having a quasi-constant profile in a fixed range of depths. In order to obtain this objective, a synthesis stochastic method (based on simulated annealing) aimed to the optimization of the weight coefficients to be applied to the array sensors has been developed and performed. The results obtained in terms of pressure profile and simulated echographic images have been reported and discussed","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125645459","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}
Pub Date : 2005-05-16DOI: 10.1109/IMTC.2005.1604449
C. M. Schuster, M. Beasley, S. Firebaugh, D. Farrar, R. Osiander, A. Darrin, D. Mehoke
This paper describes an experimental control and test system for microelectromechanical (MEM) and passive thermal switches to be tested on MidSTAR, a small satellite built and operated by the United States Naval Academy. The system has two components: an external unit that contains the devices under test as well as heaters and sensors, and an internal unit that controls the switches, monitors their performance, and communicates with the command and data handling (C&DH) unit of the satellite. This paper discusses the design of both the internal and external unit, and the testing protocol
{"title":"Operational Characterization System and Communication Interface for Microelectromechanical (MEM) and Passive Thermal Switches for the MidSTAR Satellite Program","authors":"C. M. Schuster, M. Beasley, S. Firebaugh, D. Farrar, R. Osiander, A. Darrin, D. Mehoke","doi":"10.1109/IMTC.2005.1604449","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604449","url":null,"abstract":"This paper describes an experimental control and test system for microelectromechanical (MEM) and passive thermal switches to be tested on MidSTAR, a small satellite built and operated by the United States Naval Academy. The system has two components: an external unit that contains the devices under test as well as heaters and sensors, and an internal unit that controls the switches, monitors their performance, and communicates with the command and data handling (C&DH) unit of the satellite. This paper discusses the design of both the internal and external unit, and the testing protocol","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122735059","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}
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