Study of closely spaced cracks in steel by eddy current method

Abstract

Abstract The article describes the design of an eddy-current transducer intended for studying the effect of closely spaced cracks in steel parts. The eddy-current transducer runs under the control of the developed hardware-software complex with a system for suppression of noise and amplification of signal received from the eddy-current transducer. Signal processing makes it possible to separate the effects of closely spaced cracks on the eddy-current transducer signal and evaluate the contribution of each crack separately. The results of experiments conducted on the samples with cracks of different depths located at different distances from each other have been presented, and the feasibility of finding different cracks located closer than the distance determined by the geometric dimensions of the windings of the eddy-current transducer has been shown.