US 12,282,002 B2
Ultrasonic inspection method, ultrasonic inspection apparatus, and computer program
Kyohei Hayashi, Tokyo (JP); and Masakazu Kamibayashi, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Appl. No. 17/928,433
Filed by MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
PCT Filed Jul. 29, 2021, PCT No. PCT/JP2021/028113
§ 371(c)(1), (2) Date Nov. 29, 2022,
PCT Pub. No. WO2022/054448, PCT Pub. Date Mar. 17, 2022.
Claims priority of application No. 2020-152143 (JP), filed on Sep. 10, 2020.
Prior Publication US 2023/0213482 A1, Jul. 6, 2023
Int. Cl. G01N 29/06 (2006.01); G01N 29/11 (2006.01); G01N 29/44 (2006.01)
CPC G01N 29/06 (2013.01) [G01N 29/11 (2013.01); G01N 29/44 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An ultrasonic inspection method comprising:
collecting data as a result of scanning an inspection target in such a manner that a plurality of probes transmit ultrasonic signals to the inspection target and the probes receive reflected ultrasonic signals from the inspection target;
rendering a primary image including a contour and an internal side of the inspection target based on the data as the result of scanning by using a sonic speed of the ultrasonic signals transmitted and received by the probes, the sonic speed being set to a predetermined value regardless of a region through which the ultrasonic signals have passed;
determining whether the contour is recognizable based on a position of the contour in the primary image; and
evaluating whether an internal flaw is present in the inspection target in the primary image, wherein
a process including the rendering of the primary image and the determining of whether the contour is present and is repeated with the predetermined value for the sonic speed being changed until the contour is determined to be recognizable.