EDDY CURRENT TESTING METHOD Russian patent published in 2017 - IPC G01N27/00 

FIELD: power industry.

SUBSTANCE: eddy current testing method consists in that eddy current signal connected to the electronic unit of detachable eddy current transducer is being compensated, eddy current transducer is mounted above a crack, the change of eddy current signal is being registered relative to compensated eddy current signal and the resulting change is being used to determine the depth of the crack in the controlled area. Compensation of eddy current signal is being performed during the installation of the eddy current transducer on the controlled area, before compensation and before the eddy current signal changes registration relative to the compensated eddy current signal under the working end of the eddy current transducer non-magnetic electrically conductive plate with holes is being installed, the holes are set alternately on the eddy current transducer axis, and the diameters of the holes must be different during the compensation and the registration of the change of the eddy current signal.

EFFECT: higher reliability of defect characterization assesment of depth of a crack.

2 cl, 6 dwg