Repair welding segment detection method and repair welding segment detection device

A repair welding segment detection device comprising:

• an input unit configured to enter input data regarding a weld bead of a workpiece produced by welding:
• a determination unit configured to execute inspection determination regarding a shape of the weld bead by using the input data and master data of a non-defective workpiece:
• a data generation unit configured to generate, based on an inspection determination result obtained by the determination unit, shape mismatch data obtained by extracting a shape mismatch portion of the weld bead;
• a calculation unit configured to divide the shape mismatch data into N, where N is an integer of 2 or more, equally divided windows in a direction perpendicular to a welding direction of the weld bead, set a shift region formed by i, where i is an integer of 1 or more, continuous windows among the respective windows, and separately calculate volumes of (N-i+1) respective shift regions obtained by shifting one by one the i windows forming the shift region in the welding direction;
• and
• a generation unit configured to determine that a shift region having a volume of a predetermined value or more among the calculated volumes of the (N-i+1) shift regions is a defective segment of the weld bead, and generate information regarding the defective segment.