Eddy-Current Interaction Between a Probe Coil and a Conducting Plate with a Cylindrical Borehole

The solution to the eddy-current interaction problem between a probe coil and a cylindrical borehole in a planar conducting sheet is solved using the truncated region eigenfunction expansion (TREE) approach and decomposition into two subproblems of different parities: odd and even. The impedance variation of the probe is calculated and the theoretical results are compared with numerical ones obtained by the finite elements method as well as with measurements.