{"title":"A lift-off revision method for magnetic flux leakage measurement signal","authors":"Lisha Peng, Songling Huang, Shen Wang, Wei Zhao","doi":"10.1109/I2MTC.2018.8409535","DOIUrl":null,"url":null,"abstract":"Magnetic flux leakage (MFL) measurement technique is commonly used in oil and gas pipeline integrity detection and defect estimation. Subject to the measurement condition, the lift-off effect is unavoidable which will affect the strength and trend of MFL signal seriously. In order to weaken the lift-off effect, this paper proposed a lift-off revision method to revise the measured signal down to a considerable level. Firstly, two corresponding signals at different lift-offs are measured. Then the signals are revised by a lift-off revision formula which is deduced based on the trend and depth-combination property of MFL signal. To demonstrate the feasibility and accuracy of the proposed method, the lift-off is revised not only from the simulation signals, but also from the experimental data of an artificial corrosion defect. In both cases, the proposed method shows a good performance for the lift-off revision of MFL signal.","PeriodicalId":393766,"journal":{"name":"2018 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2018 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/I2MTC.2018.8409535","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 10
Abstract
Magnetic flux leakage (MFL) measurement technique is commonly used in oil and gas pipeline integrity detection and defect estimation. Subject to the measurement condition, the lift-off effect is unavoidable which will affect the strength and trend of MFL signal seriously. In order to weaken the lift-off effect, this paper proposed a lift-off revision method to revise the measured signal down to a considerable level. Firstly, two corresponding signals at different lift-offs are measured. Then the signals are revised by a lift-off revision formula which is deduced based on the trend and depth-combination property of MFL signal. To demonstrate the feasibility and accuracy of the proposed method, the lift-off is revised not only from the simulation signals, but also from the experimental data of an artificial corrosion defect. In both cases, the proposed method shows a good performance for the lift-off revision of MFL signal.