The Finite Element Simulation of the Improvement in Remote Field Eddy Current Probe Structure

The remote field eddy current is a developing branch of eddy current nondestructive testing.It is mainly used for the nondestructive testing of the ferromagnetic pipe.Compared to the conventional eddy current nondestructive testing,it has the same sensitivity for both the inner and the exterior defect,and has no effect of the lifting off.Because of the detecting coil is on the remote field,the probe is too long,and that caused inconvenient for the actual testing.So the probe needs to be improved,the remote field is made ahead,and the distance is reduced between the exciting coil and the detecting coil.A series of improving schemes were described.For the schemes,some of models were built.By using the finite element simulating software ANSYS,the simulating results of the models were obtained.The results will be useful for improving the remote field eddy current probe.