S. Dickinson, R. Binns, W. Yin, C. Davis, A. Peyton
{"title":"The Development of a Multi-frequency Electromagnetic Instrument for Monitoring the Phase Transformation of Hot Strip Steel","authors":"S. Dickinson, R. Binns, W. Yin, C. Davis, A. Peyton","doi":"10.1109/imtc.2005.1604311","DOIUrl":"https://doi.org/10.1109/imtc.2005.1604311","url":null,"abstract":"This paper describes the development of an instrument to analyze the phase transformations of hot strip steel using an electromagnetic sensor. The sensor exploits variations in the electrical conductivity and magnetic permeability of the steel to monitor microstructure evolution during processing. The sensor is an inductive device based on a H-shaped ferrite core, which is interrogated with a multi-frequency impedance analyzer (MFIA) containing a digital signal processor (DSP). An overview of the instrument and measurements from a range of carbon steels sample are presented. The results verify the ability of the instrument both to monitor the microstructural changes and to reject variations in liftoff distance between the sensor and the hot strip","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"39 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":"121967463","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}
F. A. Wegelin, Robson da Silva Magalhães, L.A.L. de Almeida, Marcio Fontana
{"title":"Condition Monitoring of Power Transformers Using Acoustic Signal Prony's Analysis","authors":"F. A. Wegelin, Robson da Silva Magalhães, L.A.L. de Almeida, Marcio Fontana","doi":"10.1109/IMTC.2005.1604376","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604376","url":null,"abstract":"On-load tap changers (OLTCs) are electromechanical devices used for voltage regulation on electrical networks. A noninvasive monitoring technique was developed using Prony's method 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 Prony's spectral analysis and standard pre-processing techniques. Traditional condition monitoring techniques exhibit a certain degree of complexity, which may be a serious drawback when designing portable low-cost maintenance equipment. In order to reduce this complexity, we introduce a new index based on Prony's analysis. The proposed technique is presented and its diagnosis capabilities are evaluated using experimental results collected from field installed equipments during their maintenance inspection","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"311 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":"124427040","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":"Inspection Tool for Harsh Environment Operation Utilizing Pulsed Remote Field Technique","authors":"D. Ambruš, V. Bilas, D. Vasić","doi":"10.1109/IMTC.2005.1604357","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604357","url":null,"abstract":"This paper focuses on design of instrumentation for nondestructive inspection of underground casing pipes, utilizing pulsed remote field technique. The presented inspection tool is designed for high-temperature environment operation, based on a principle of combining thermally `uprated' commercial-grade components with application-specific, high-temperature rated parts. Key design issues regarding the expected measurement performance and reliability of the tool are discussed. Results of laboratory tests have confirmed practical usability of the developed inspection tool for a targeted harsh-environment application","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":"125765588","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":"Pattern Analysis Using Zernike Moments","authors":"E. M. Arvacheh, H. Tizhoosh","doi":"10.1109/IMTC.2005.1604417","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604417","url":null,"abstract":"Complex Zernike moments derive independent spatial information from an image due to the orthogonality of the Zernike polynomials. The orthogonality, rotation invariance and spatial feature representation of the Zernike moments have been the main motivations to study their characteristics. Statistical variability of iris patterns has encouraged us to apply Zernike moments to a database of iris images in order to evaluate their feature representation performance. The features are in complex form and represented by phase and magnitude information. In this experiment, characteristics of the magnitude information have been studied and the results of 250 comparisons among 50 different eye images are presented as well.","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"42 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":"128333880","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":"Hebbian Learning Based Image Reconstruction for Positron Emission Tomography","authors":"P. Mondal, R. Kanhirodan","doi":"10.1109/IMTC.2005.1604391","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604391","url":null,"abstract":"Maximum a-posteriori (MAP) algorithms eliminates noisy artifacts by utilizing available prior information in the reconstruction process. The MAP based algorithms fail to determine the density class in the reconstructed image and hence penalize the pixels irrespective of the density class and irrespective of interaction between the nearest neighbors. In this paper, Hebbian neural learning scheme is proposed to model the nature of inter-pixel interaction in order to reconstruct artifact-free edge-preserving reconstruction. It is assumed that local correlation plays a significant role in the image reconstruction process and proper modeling of correlation weight (which defines the strength of inter-pixel interaction) is essential for generating artifact free reconstruction. Quantitative analysis shows that the proposed scheme based reconstruction algorithm is capable of producing better reconstructed images. The reconstructed images are sharper with small features being better resolved","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"2 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":"129813584","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":"Measurements of Complex Permittivity and Loss Tangent of Silicon Carbide at Millimeter Wavelengths","authors":"M. Afsar, Shu Chen, Yong Wang, D. Sakdatorn","doi":"10.1109/IMTC.2005.1604517","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604517","url":null,"abstract":"High purity semi-insulating 4H-SiC is highly desirable for SiC MESFET and GaN HEMT based power microwave devices. With the presented measurement techniques, namely cavity-length variation technique of open resonator operating at 60GHz, together with dispersive Fourier transform spectroscopy (DFTS), we successfully carried out the precise dielectric measurements of a pair of high purity semi-insulating 4H-SiC wafer specimens. Excellent agreement was obtained between two experimental systems. Therefore, it proves the versatility and accuracy of our established measurement techniques","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":"129834806","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":"Development of Trajectory Model for a Tractor-Implement System for Automated Navigation Applications","authors":"Lei Feng, Yong He, Y. Bao, H. Fang","doi":"10.1109/IMTC.2005.1604364","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604364","url":null,"abstract":"Automation for precision agriculture will lead to more precise maneuvering, more consistent performance, higher efficiency, and less labor costs in operation. The objective of this research is to create a dynamic model for estimating trajectories of a tractor-implement system traveling in the field to provide necessary information for supporting accurate tractor automated guidance and precision farming decision-making. This research investigated the dynamic response of a tractor-implement system via a dynamic model of the system. The simulation results obtained from this model were validated by field tests. The cornering stiffness of the wheels was found to be the critical system parameter in this model. Field validation test results indicated that the tractor system dynamic trajectory model developed could accurately estimate the trajectories of a tractor-implement system at various traveling speeds","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"54 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":"127112401","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":"Calibration of an Infrared Camera for Thermal Characterization of High Voltage Power Electronic Components","authors":"T. Salem, D. Ibitayo, B. Geil","doi":"10.1109/IMTC.2005.1604249","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604249","url":null,"abstract":"Thermal performance of power electronic components is a limiting factor on the power density and design of high voltage high power systems. Therefore, accurate assessment and characterization on the thermal capabilities of these components is critical for the development and design of high density power applications. This paper presents a methodology for calibrating an infrared camera system for use in characterizing high voltage power electronic components","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"64 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":"127223693","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":"Towards an hypertext of electric measurement: different approaches for an on-line, remote, didactic lab.","authors":"A. Ferrero, S. Salicone","doi":"10.1109/IMTC.2005.1604340","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604340","url":null,"abstract":"Hypertexts are becoming a promising solution in educational activities, since they allow to integrate, in the same product, different ways for presenting a specific topic: traditional text and drawings, animated pictures and graphics, video and audio clips, interactive exercises and simulation though lab classes are extremely important when teaching measurement issues, up to now these solutions do not allow direct access to experimental activity involving the use of real instruments. This paper proposes different solutions for integrating a remote laboratory in a hypertext of electrical measurement and shows how they have been implemented in the realization of a remote experiment on a three-phase three-terminal load","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"131 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":"127375928","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":"Frequency-Invariant Beamforming in Very Short Arrays for AUVs Instrumentation","authors":"S. Repetto, A. Trucco","doi":"10.1109/IMTC.2005.1604316","DOIUrl":"https://doi.org/10.1109/IMTC.2005.1604316","url":null,"abstract":"Frequency-invariant beam patterns are often required in systems using an array of sensors to acquire and measure broadband signals. Although several methods have been proposed to design a broadband beamformer (typically realized by an FIR filter for each sensor) with a frequency-invariant beam pattern, till now the case in which the spatial aperture is shorter than the involved wavelengths has not been addressed. In such a case, the use of a super directive beam pattern is essential to attain an efficient system. In this paper, a novel method to design a broadband beamforming that produces a frequency-invariant beam pattern for a data-independent super directive array is proposed and compared with other potential approaches. The method generates a far-field beam pattern that reproduces the desired profile over a very wide frequency band, also if the array is shorter than the wavelength. Two steps are necessary: (1) the generation of many apodizing windows at different frequency values by a stochastic method; (2) the synthesis of the FIR filters with the Parks-McClellan technique. At the end of the design chain, the very simple implementation and the robustness to array imperfections of the attained broadband beamformer increases the applicability of the system, for instance, in underwater acoustic systems devoted to communication, measurement and telemetry deployed on small vehicles","PeriodicalId":244878,"journal":{"name":"2005 IEEE Instrumentationand Measurement Technology Conference Proceedings","volume":"35 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":"129101981","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}