EDDY-CURRENT METHOD FOR DETERMINATION OF DEPTH OF DEFECT AND RESIDUAL THICKNESS OF NOT DAMAGED LAYER OF THIN-WALL CONSTRUCTIONS MADE OF NON-FERROMAGNETIC MATERIALS

摘要

Eddy-current method for determination of depth of defect and residual thickness of not affected layer of thin-wall constructions made of non-ferromagnetic materials at which one determines linear distribution of amplitude of signal of vortex-current transformer along the defect revealed at orientation of eddy-current transformer at which projection of centers of counter-connected windings of vortex-current transformer to controlled surface in line of defect, one determines coordinates of two points on linear distribution in which amplitude of signal of defect has maximal values and by distance between the points with maximal amplitude one determines length of defect, depth of defect and respective residual thickness of not affected layer are determined by correlation dependences plotted for determination of value of length of defect.