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.
作者
张芸
王银丽
蒋天植
黄有骏
孙琦
林超
喻恒
李昱
ZHANG Yun;WANG Yin-li;JIANG Tian-zhi;HUANG You-jun;LIN Chao;YU Heng;LI Yu(Nuclear Reactor System Design Technology Laboratory of Nuclear Power Institute of China, Sichuan Chengdu, 610213)
出处
《科技视界》
2019年第8期11-14,共4页
Science & Technology Vision
关键词
远场涡流
双接收线圈
速度效应
RFEC testing
Sensor
Spurious peaks
Wavelet threshold de-noising
Defects evaluation
