Finite element modelling of pulsed eddy currents for nondestructive testing

The pulsed eddy current technique is widely used to detect flaws in conducting plates. Time transient data from the system can be used to produce a frequency response which enables a user to detect the presence of defects. This paper is concerned with modeling this technique using 3D finite elements. Data from the time transient finite element model is used to produce a frequency response, this is compared to values from an experimental test rig. A method of analyzing the response signal in real time is also discussed. This allows a fast method of detecting and quantifying defects in conducting structures.