POSITION DETECTION DEVICE OF WELDED PORTION, ULTRASONIC FLAW DETECTION DEVICE, FLAW DETECTION DEVICE OF WELDED PORTION, AND POSITION DETECTION PROGRAM OF WELDED PORTION

摘要

PROBLEM TO BE SOLVED: To accurately detect a position in a width direction for a linear welded portion.;SOLUTION: A position detection device of a welded portion is a device for detecting a position in a width direction of a linear welded portion having a welding bead covering both sides of a welded material, and includes a plurality of ultrasonic flaw detection parts arranged by crossing a longitudinal direction of the welded portion at one surface side of the welded material. At least one ultrasonic probe part is a center probe part for detecting a plate thickness change of the welding part in order to detect a center position in a width direction, and at least two ultrasonic probe parts located at both outsides in the width direction of the center flaw detection part are lateral flaw detection parts for detecting a change in height of an ultrasonic echo reflecting from an inner surface in order to detect a boundary portion side in the width direction of the welding part.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT