Modeling a Two-Element Tangential Eddy Current Probe with Active Shielding for Soldered Joint Testing

Abstract

The paper is devoted to the development of a finite element model of an eddy current probe designed to test the degree of soldering in lap-joint soldered connections of conductive busbars. A methodology for developing a finite element model has been devised that includes a geometric parameter that, when altered, leads to the remeshing of the finite element grid without affecting the test parameters of nondestructive testing. This allows for a series of signal measurements of the finite element model of the eddy current probe, followed by averaging, thereby ensuring acceptable accuracy. The test results confirm the functionality of the eddy current probe, with a defect size measurement range in the soldered joint from 0 to 100% and a guaranteed main absolute error in measuring the degree of soldering of 5%.