PROCESS OF EDDY-CURRENT TESTING OF MATERIALS Russian patent published in 2000 - IPC

FIELD: nondestructive testing of materials. SUBSTANCE: process makes it feasible to detect presence of cracks, pores and fatigue phenomena in various materials. During measurement excitation source and instrument converter are set immobile relative one another. Difference signal is formed by results of two measurements in each measurement position. Second measurement in each position is conducted by imparting excitation source with functions of instrument converter and instrument converter with functions of excitation source. Process enables influence of changing interfering factors, for instance, inconstancy of clearance with displacement of converters over test surface on test result to be excluded without use of standards.. EFFECT: enhanced reliability of process. 1 cl