Development of adaptive eddy-current instruments for flaw sizing

The design of an eddy-current transducer (ECT) equipped with an oscillatory circuit was developed; interrelations between the voltage fed to the flaw detecting and measuring module and flaw parameters, operating gap, frequency, and tilt angle of the ECT were studied theoretically and experimentally. Different methods of ECT signal filtering and approximation of obtained magnitudes are considered. Instruments developed for eddy-current inspection are represented.