STANDARD TEST PIECE FOR CORRECTION OF EDDY CURRENT TESTING DEVICE

摘要

According to the present invention, disclosed is a standard test piece for correcting an eddy current test device used for a nondestructive test about a defect in a rotor, etc. According to an embodiment of the present invention, disclosed is a standard test piece comprising at least one body part including a mountain part relatively protruding toward the outside and a valley part relatively dented toward the inside. The body part has a through hole vertically penetrating the body part in at least one side. [Reference numerals] (AA) Lift-off; (BB) Eddy current; (CC) Secondary magnetic field