Simulation research on quantitative detection on cracks based on rectangular PEC sensor

Due to the structure characteristic of traditional pulsed eddy current(PEC)sensor,there is self-excitation disturbance in practical detection which causes low sensitivity.A rectangular sensor is proposed to improve the detectability.On the basis of analysis of detecting principle of this sensor,detecting model of rectangular PEC sensor is set up using ANSYS software.The distribution of eddy current and the disturbance of 3D magnitic field caused by crack is analyzed by simulation.The result shows that the rectangular sensor can induce uniform eddy current on the aluminium plate,and a crack's size can be quantified dectected by analyzing the 3 signals.