Patent ID: 9170235
Filing Date: 2015-10-27
Classification: G01N

Abstract:
1. An eddy current testing apparatus comprising: an eddy current testing probe having an eddy current testing coil arranged on a bottom portion of a casing; a pressing mechanism configured to press the eddy current testing probe so that the bottom portion of the eddy current testing probe is placed in contact with a part of an inner wall surface of a slot formed in an object to be inspected; a carriage configured to mount the pressing mechanism and the eddy current testing probe, the carriage traveling in a depth direction of the slot; and an eddy current testing control device configured to control defect detection for the inner wall surface of the slot by acquiring a detected eddy current signal from the eddy current testing coil; wherein the carriage travels along the slot on an outer upper surface of the object to be inspected while being held by the outer upper surface of the object having the slot formed therein, the pressing mechanism mounted on the carriage includes a first spring member, a second spring member, a holding plate member attached to the carriage through the first spring member, and two eddy current testing probe holding members suspended by the holding plate member and downwardly extended from the holding plate member to the inside of the slot, the two holding member being coupled to each other by the second spring member and each configured to hold the eddy current testing probes, the first spring member upwardly presses the holding plate member and the two eddy current testing probe holding members suspended by the holding plate member by a compression repulsive force of the first spring member, and the second spring member presses the two eddy current testing probe holding members by a compression repulsive force of the second spring member against the inner wall surfaces included in the slot, the inner wall surfaces being substantially opposed to each other.