Patent ID: 11927569
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. A non-transitory computer-readable storage medium storing an ultrasonic flaw detection program for performing an ultrasonic flaw detection on a subject of which an external shape changes in a scan direction, using a flaw detection probe that is a phased-array ultrasonic flaw detection probe in which a plurality of oscillators are disposed in an arc shape at intervals, the non-transitory computer-readable storage medium storing the ultrasonic flaw detection program causing a computer to execute:
a scanning process of moving, in the scan direction of the subject, the flaw detection probe installed such that a reference curvature center, which is a curvature center of an external curve of a cross section of the subject at a reference scan position of the subject, coincides with a curvature center of the flaw detection probe;
a beam control process of controlling an ultrasonic beam emitted from the flaw detection probe such that a converging position of the ultrasonic beam coincides with an inspection curvature center that is a curvature center of an external curve of a cross section of the subject at each scan position;
a receiving process of receiving a reflected beam reflected from the subject;
a flaw estimation process of estimating a length of a flaw in a circumferential direction of the subject on the basis of the reflected beam; and
a correction process of correcting an estimated length of the flaw by using a correction coefficient according to an amount of deviation between the reference curvature center and each inspection curvature center in a thickness direction of the subject.