Precision Measurement of Eddy Current Coil Parameters

Investigation of experimental techniques for accurate electrical characterization of eddy current test coils and determination of the effect of various mechanisms, such as shorts, defective ferrite, or mechanical disturbance on the coil signature is important to the understanding and proper use of these coils. Such information is helpful in two areas of eddy current NDE; the evaluation of poorly performing commercial probes and the more esoteric problem of determining the interaction between an eddy current coil and a part containing defects