Title:
ULTRASONIC FLAW DETECTION METHOD AND ULTRASONIC FLAW DETECTION DEVICE
Document Type and Number:
Japanese Patent JP2014202525
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an ultrasonic flaw detection method which does not generate an erroneous detection though minimizing a non-detection flaw region even when a shape of a boundary echo is changed.SOLUTION: The ultrasonic flaw detection method includes: a condition setting step of setting a boundary echo detection threshold value at a positive side and a negative side; a flaw detection signal acquisition step of acquiring a flaw detection signal; a boundary echo detection step of detecting a boundary echo detection time at the positive side and the negative side of the flaw detection signal; a reference time selection step of selecting any time among the boundary echo detection times at the positive side and the negative side as a reference time; a flaw echo detection gate setting step of setting an end point of a flaw echo detection gate by subtracting a predetermined time from the reference time; and a flaw echo detection step of performing a detection of the flaw echo using an amplitude of the flaw detection signal inside the flaw echo detection gate.
Inventors:
OZEKI TAKAFUMI
YOTSUTSUJI JUNICHI
TAKADA HIDEKI
TOMURA YASUO
YOTSUTSUJI JUNICHI
TAKADA HIDEKI
TOMURA YASUO
Application Number:
JP2013076943A
Publication Date:
October 27, 2014
Filing Date:
April 02, 2013
Export Citation:
Assignee:
JFE STEEL CORP
International Classes:
G01N29/04
Domestic Patent References:
| JP2004012369A | 2004-01-15 | |||
| JP2002277447A | 2002-09-25 | |||
| JPH05232092A | 1993-09-07 | |||
| JP2012154877A | 2012-08-16 | |||
| JP2000249534A | 2000-09-14 | |||
| JP2004012369A | 2004-01-15 |
Foreign References:
| WO2014163022A1 | 2014-10-09 | |||
| WO2014163022A1 | 2014-10-09 |
Attorney, Agent or Firm:
Hiroaki Sakai
Previous Patent: MOVABLE MEMBER CONNECTION MECHANISM AND LOAD SENSOR USING THE SAME
Next Patent: RECORDER
Next Patent: RECORDER