Title:
NON-DESTRUCTIVE TESTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/141074
Kind Code:
A1
Abstract:
Provided is a non-destructive testing device that can efficiently find the center location of a nugget, and test a welded region. The device has a processor (20) that applies a magnetic field to a measurement subject (2), generating magnetic flux density, and after the magnetic field is discontinued, uses an induced electromotive force detector (17) to measure the magnetic fluxes emitted from multiple locations on the measurement subject (2), calculates time constants of transient change of the plurality of magnetic fluxes, and detects the internal structure of the measurement subject (2) from the distribution of the time constants. The processor (20) prompts the induced electromotive force detector (17) to make first measurements at predetermined locations on the measurement subject (2), prompts the induced electromotive force detector (17) to make second measurements at locations rotated by a predetermined angle from the predetermined locations on the measurement subject (2), and based on the internal structure detected by the first measurements and the internal structure detected by the second measurements, estimates the center location of the nugget and/or the diameter of the nugget which has been formed inside the measurement subject (2).
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Inventors:
KUBOTA TOSHIHIKO (JP)
KAWANABE OSAMU (JP)
KIMURA TAKASHI (JP)
OKUDA ATSUSHI (JP)
KAWANABE OSAMU (JP)
KIMURA TAKASHI (JP)
OKUDA ATSUSHI (JP)
Application Number:
PCT/JP2012/059366
Publication Date:
October 18, 2012
Filing Date:
April 05, 2012
Export Citation:
Assignee:
HONDA MOTOR CO LTD (JP)
NIPPON KOUATSU ELECTRIC CO LTD (JP)
KUBOTA TOSHIHIKO (JP)
KAWANABE OSAMU (JP)
KIMURA TAKASHI (JP)
OKUDA ATSUSHI (JP)
NIPPON KOUATSU ELECTRIC CO LTD (JP)
KUBOTA TOSHIHIKO (JP)
KAWANABE OSAMU (JP)
KIMURA TAKASHI (JP)
OKUDA ATSUSHI (JP)
International Classes:
G01B7/12; B23K31/00; G01B7/00; G01N27/72; B23K11/11
Domestic Patent References:
| WO2003027661A1 | 2003-04-03 | |||
| WO2010146939A1 | 2010-12-23 |
Foreign References:
| JPH1026609A | 1998-01-27 | |||
| JP2001324479A | 2001-11-22 | |||
| JP3098193B2 | 2000-10-16 |
Other References:
See also references of EP 2698595A4
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
Right wood Masayuki (JP)
Right wood Masayuki (JP)
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Claims: