测速对远场涡流管道缺陷检测的影响
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摘要
在基于远场涡流的管道缺陷定量检测中,在距离激励线圈2-8倍管道内径的位置设置了2个物理属性完全相同的接收线圈来实现管道缺陷的检测。当仪器以一定速度进行管道检测时,由于管道作为闭合导体,当产生磁场的激励线圈与管道产生相对速度时,由楞次定律可知,管道会产生阻碍磁场变化的感应电流影响缺陷检测。为了直观分析仪器速度效应给检测带来的影响,利用ANSYS有限元仿真软件建立远场涡流双线圈检测模型进行了仿真,鉴于远场涡流为低频测试以及仪器参数自身等限制,仪器存在最大检测速度,在最大检测速度以内仿真结果表明:随着仪器运行速度的增加两个检测线圈上的感应电压幅值减小,相位也有减小的特征,进一步反应速度对管道缺陷定量检测的影响,将检测的特征相位转化成管道壁厚,经过误差分析确定在最大速度范围内,远场涡流检测中由仪器速度效应带来的误差很小。
In the quantitative detection of Pipeline Defects based on remote field eddy current( RFEC), setting 12 uniformly distributed sensors to realize pipeline defection. However, sensor reception signals involved in the spurious peak when the transmitting coil is in the position right of the pipeline defects, which affects the accuracy of the quantitative analysis of pipeline defect. For removing spurious peak, the two coaxial receiving coils are applied to get two time shifting feature signals. After removing spurious peak f.
In the quantitative detection of Pipeline Defects based on remote field eddy current( RFEC), setting 12 uniformly distributed sensors to realize pipeline defection. However, sensor reception signals involved in the spurious peak when the transmitting coil is in the position right of the pipeline defects, which affects the accuracy of the quantitative analysis of pipeline defect. For removing spurious peak, the two coaxial receiving coils are applied to get two time shifting feature signals. After removing spurious peak f.
引文
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[2]李育忠,郑宏丽,贾世民,刘全利,邓凯夫,张金权.国内外油气管道检测检测技术发展现状[J].石油科技论坛,2012,No.2.pp:30-35.LI Y Z,ZHENG H L,JIA S M,LIU Q L,DENG K F.ZHANG J Q.The Research Status of Pipe Detecting in Domestic and Overseas[J].Oil Forum,2012,Vol.2,pp:30-35.
[3]徐小杰.管道远场涡流无损检测技术综述[J].管道技术与设备,2015,No.3.pp:21-23.XU X J.Remote Field Eddy Current Non-destructive Testing for Pipes and Tubes[J].Pipeline Technique and Equipment,2015,vol.3,pp:21-23.
[4]CHEN Y B,ZHENG J,LUO W J.Remote Field Eddy Current Testing Technology for Ferromagnetic Heat Exchanger Tubes[J].ASME Pressure Vessels and Piping Conference,2012,Vol.5,pp:237-239.
[5]刘亮,师奕兵,王志刚.远场涡流法套损测试仪中检测系统的研制[J].测控技术,2012,Vol.31(3):40-43.LIU L,SHI Y B,WANG Z G.Development of Signal Detection in Casing Damage Tester Based on Remote Field Eddy Current Method[J].Measurerment and Control Technology,2012,Vol.3,pp:40-43.
[6]张伟,师奕兵,王志刚,敖永才.管道裂纹远场涡流检测的缺陷反演方法研究[J].仪器仪表学报,2013,Vol.34(8):1681-1689.ZHANG W,SHI Y B,WANG Z G,AO Y C.Research on The Quantitative Inverse Model of RFEC Inspection for Pipe Cracks[J].Chinese Journal of Scientific Instrument,2013,Vol.34(8),pp:1681-1689.
[7]罗清旺,师奕兵,王志刚,张伟,马东.一种基于远场涡流的管道大面积缺陷定位检测方法[J].仪器仪表学报,2015,Vol.36(12),pp:2790-2797.LUO QW,SHI Y B,WANG Z G,ZHANG W,MA D.Location and Inspection Method For Large Area Pipe Defect Based On RFEC Testing[J].Chinese Journal of Scientific Instrument,2015,Vol.36(12),pp:2790-2797.