基于ANSYS有限元方法的低频涡流检测仿真

Simulation of low frequency eddy current detectionbased on ANSYS FEM

为了研究电涡流传感器在低频涡流检测中电涡流探头线圈的结构参数对检测性能的影响,通过ANSYS建立电涡流传感器的检测模型,进行有限元法仿真分析,研究电涡流传感器探头线圈内外径之差、厚度、等效半径结构参数对电涡流传感器检测性能的影响。结果表明:线圈的内外径之差越小,探头的分辨率越高;减小线圈厚度有利于提高线圈较近距离的分辨率,增大线圈厚度有利于提高较远距离下的检测分辨率;当等效半径为2倍左右提离距离时(r=2d),探头的分辨率高。

In order to study on influence of the structure parameters of the coil of the eddy current probe on the performance of the eddy current sensor in low frequency eddy current detection,the detection model for the eddy current sensor is established by ANSYS.The parameters of inner and outer diameter,thickness and equivalent radius of the probe coil of the eddy current sensor are studied by ANSYS finite element simulation.The results show that the lower the diameter difference of the coil,the higher the resolution of the probe.The reduction of coil thickness is beneficial to improve the resolution of the coil at a closer distance and the increase of coil thickness is beneficial to improve the detection resolution at a longer distance.When the equivalent radius is about two times(r=2d),the resolution of the probe is high.