基于阵列涡流技术的裂纹特征量研究

阵列涡流传感器能够实现导电材料的大面积高速扫描。不同走向的裂纹对线圈间互感的影响是不同的,因此,测量线圈间的互感能够获得更多的缺陷信息。利用ANSYS软件对横向和纵向裂纹进行了三维有限元仿真,得到了相应的阵列涡流敏感线圈感应电动势幅值变化曲线。仿真结果表明:通过测量线圈间的互感,可以实现对裂纹长度和方向等特征量的检测。

Research on defect characters based on array eddy current testing

Array eddy current sensor has the advantage of high speed scanning to wide area of conductive materials.Defects with different orientations have different effect on mutual inductance between array eddy current sensors.Thus more defect information can be obtained by measuring the mutual inductance.Transverse and longitudinal cracks are studied with 3-D finite element method based on ANSYS.The induced EMF amplitude of each coil is acquired corresponding to a given position of the crack.The simulation results ...