Title:
超音波探傷システムおよび超音波探傷方法
Document Type and Number:
Japanese Patent JP7381888
Kind Code:
B2
Abstract:
To prevent erroneous detection when ultrasonically detecting a flaw existing inside a material to be flaw-detected.SOLUTION: A flaw detector 400 sets a flaw detection range so that at least parts of flaw detection ranges of at least two types of flaw detection are overlaid with each other, out of vertical flaw detection, + oblique angle flaw detection and - oblique angle flaw detection that are done by ultrasonic probes different from each other. The flaw detector 400 derives: an echo intensity-position relationship when vertical flaw detection is done; an echo intensity-position relationship when + oblique angle flaw detection is done in a range overlapped by the flaw detection range of the vertical flaw detection; and an echo intensity-position relationship when - oblique angle flaw detection is done in a range overlapped by the flaw detection range of the vertical flaw detection. The flaw detector 400 determines, when the maximum echo intensity exceeds a threshold at the same position in the longitudinal direction of square steel M in two or more echo intensity-position relationships out of the three echo intensity-position relationships, that the steel has a flaw at the position.SELECTED DRAWING: Figure 4
Inventors:
Masaki Miyashita
Kentaro Nakatani
Kentaro Nakatani
Application Number:
JP2020045069A
Publication Date:
November 16, 2023
Filing Date:
March 16, 2020
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
G01N29/04
Domestic Patent References:
| JP2019132663A | ||||
| JP2013148597A | ||||
| JP2005195349A | ||||
| JP59148864A |
Attorney, Agent or Firm:
Koetsu Kokubun
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