ULTRASONIC FLAW DETECTION METHOD AND ULTRASONIC TEST EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To provide ultrasonic test equipment that achieves improvement of a flaw detection sensitivity on the basis of an ultrasonic property even if the ultrasonic property of an inspected material is unknown.

SOLUTION: The ultrasonic test equipment includes: first and second ultrasonic probes that are arranged on a cylindrical or columnar structure; an ultrasonic flaw detector; a probe movement controller; and a flaw detection controller for executing arithmetic processing. The flaw detection controller comprises: reference sensitivity setting means for retrieving a reference detection level from a flaw detection sensitivity database storing the reference detection level; correction strength calculation means for obtaining correction strength on the basis of transmission method echo strength that is obtained by an ultrasonic transmission method using the ultrasonic probes and of the transmission method echo strength that is obtained by testing using a reference specimen stored in the flaw detection sensitivity database; flaw detection sensitivity setting means for obtaining a flaw detection level from the reference detection level and the correction strength; flaw part detection means for measuring reflection echo strength by an ultrasonic reflection method with the ultrasonic probes; and flaw determination means for determining a flaw by comparing the flaw detection level with the reflection echo strength.

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