{"title":"Suppressing sensor lift-off effects on cracks signals in surface magnetic field measurement technique","authors":"R. Amineh, S. Sadeghi, R. Moini","doi":"10.1109/ICIT.2003.1290332","DOIUrl":null,"url":null,"abstract":"As in the eddy current technique, a major problem for crack measurement in the surface magnetic field measurement (SMFM) technique is the lift-off distance of the sensor. The nonzero value of lift-off distance tends to smear out the discontinuity in the SMFM crack signal, causing errors in crack characterization. The paper presents a method for sensor lift-off evaluation and crack signal restoration in the SMFM technique. The method employs a deconvolution technique and uses a suitable cost function based on the relations available for electromagnetic field distributions at the metal surface. Simulation results are presented to demonstrate the accuracy of the method.","PeriodicalId":193510,"journal":{"name":"IEEE International Conference on Industrial Technology, 2003","volume":"111 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2003-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE International Conference on Industrial Technology, 2003","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICIT.2003.1290332","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
As in the eddy current technique, a major problem for crack measurement in the surface magnetic field measurement (SMFM) technique is the lift-off distance of the sensor. The nonzero value of lift-off distance tends to smear out the discontinuity in the SMFM crack signal, causing errors in crack characterization. The paper presents a method for sensor lift-off evaluation and crack signal restoration in the SMFM technique. The method employs a deconvolution technique and uses a suitable cost function based on the relations available for electromagnetic field distributions at the metal surface. Simulation results are presented to demonstrate the accuracy of the method.
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