Title:
ULTRASONIC FLAW DETECTION DEVICE FOR INSPECTING WELDS, ULTRASONIC FLAW DETECTION METHOD FOR INSPECTING WELDS, AND RAILROAD-CAR-STRUCTURE MANUFACTURING METHOD USING SAME
Document Type and Number:
WIPO Patent Application WO/2015/111143
Kind Code:
A1
Abstract:
This invention provides an inspection device whereby, when performing an ultrasonic inspection on an object that comprises thin plate members and makes it impossible to get close to flaws, reflection sources such as scratches can be displayed in correct positions. This ultrasonic flaw detection device, which is used to inspect welds between members, is provided with an ultrasonic sensor array that transmits and receives ultrasound to and from a weld, an ultrasonic-sensor-array holder that moves said ultrasonic sensor array in the lengthwise direction of the weld, an ultrasonic flaw detector that converts the ultrasound received by the ultrasonic sensor array to echoes, a flaw-detection controller that uses said echoes to detect flaws in the weld, and a display unit that displays measurement results. The flaw-detection controller has the following: a display-position correction unit that corrects distortion in measurement images in accordance with a display-position conversion formula based on ultrasound-echo display refraction angles and display depths recorded in the flaw-detection controller; a reference echo-intensity table obtained from the ultrasound-echo display refraction angles and display depths recorded in the flaw-detection controller; and a flaw identification unit that identifies flaws by comparing the intensities of extracted flaw echoes.
Inventors:
MIKI MASAHIRO (JP)
KITAZAWA SOU (JP)
OGATA MASAMI (JP)
GOTOU NORIAKI (JP)
AINOURA TOMOYUKI (JP)
KOBAYASHI YOSHIHIRO (JP)
KITAZAWA SOU (JP)
OGATA MASAMI (JP)
GOTOU NORIAKI (JP)
AINOURA TOMOYUKI (JP)
KOBAYASHI YOSHIHIRO (JP)
Application Number:
PCT/JP2014/051179
Publication Date:
July 30, 2015
Filing Date:
January 22, 2014
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G01N29/04; G01N29/44
Foreign References:
| JP2013044582A | 2013-03-04 | |||
| EP2120045A1 | 2009-11-18 | |||
| JP2011141123A | 2011-07-21 | |||
| EP2249152A2 | 2010-11-10 |
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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