WELD LINE POSITION MEASURING METHOD, WELD LINE POSITION MEASURING DEVICE, AND TRAVELING BODY AUTOMATICALLY FOLLOWING WELD LINE

摘要

PROBLEM TO BE SOLVED: To provide a weld line position measuring device which is provided with a surface displacement data creating means that measures the position of the surface of a weld base material part in a direction inclining at an angle with respect to the weld line and the surface displacement at this position to create surface displacement data, and determines the center position of the weld line on the surface of the weld base material part from the displacement data. SOLUTION: The device comprises a surface displacement data correcting means 63 that corrects the surface displacement data z (x) to corrected displacement data z1 (x) with equal surface displacements at both end portions on the basis of the displacements of the surface of both ends portions of position x of the surface displacement data z (x), and a means 81 for determining the weld line position that determines the center position of the weld line based on the corrected displacement data z1 (x).