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 = 2 d）

the resolution of the probe is high.