Title:
METHOD FOR SUBJECTING STRUCTURE FORM OF WELD TO IMAGING AND DEVICE THEREFOR
Document Type and Number:
WIPO Patent Application WO/2011/142474
Kind Code:
A1
Abstract:
The structure form of a weld is rapidly and accurately (clearly) subjected to imaging with non-destructive inspection. Specifically, at the time of the imaging of the structure form of the weld for receiving the reflected signal from the inside of a test object (S) while scanning the cross-section surface perpendicular to the welding direction of the test object with an ultrasonic beam (B), and subjecting the cross-section surface scanned on the basis of the received reflected signal to the imaging so as to inspect the structure of a weld (2), a moving average waveform (Ra) is subtracted using an average score (m), whereby the slowly varying component of the received signal is eliminated, the reflected signal from the structure of the weld is extracted, and only the extracted reflected signal is amplified, or the cross-section surface perpendicular to the welding direction is scanned with a focused ultrasonic beam at a plurality of different positions relative to the welding direction of the test object, the cross-section surface scanned on the basis of the obtained ultrasonic received signal is subjected to the imaging, a plurality of the images obtained by scanning the cross-section surface at the plurality of positions relative to the welding direction are superimposed one upon another, and the maximum value of the superimposed pixels is maintained, thereby emphasizing the reflected wave from the structure of the weld.
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Inventors:
MATSUI, Yutaka (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
松井 穣 (〒11 東京都千代田区内幸町二丁目２番３号ＪＦＥスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
IIZUKA, Yukinori (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
飯塚 幸理 (〒11 東京都千代田区内幸町二丁目２番３号ＪＦＥスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
松井 穣 (〒11 東京都千代田区内幸町二丁目２番３号ＪＦＥスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
IIZUKA, Yukinori (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
飯塚 幸理 (〒11 東京都千代田区内幸町二丁目２番３号ＪＦＥスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
Application Number:
JP2011/061132
Publication Date:
November 17, 2011
Filing Date:
May 10, 2011
Export Citation:
Assignee:
JFE STEEL CORPORATION (2-3 Uchisaiwai-cho 2-chome, Chiyoda-ku Tokyo, 11, 〒1000011, JP)
ＪＦＥスチール株式会社 (〒11 東京都千代田区内幸町二丁目２番３号 Tokyo, 〒1000011, JP)
MATSUI, Yutaka (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
松井 穣 (〒11 東京都千代田区内幸町二丁目２番３号ＪＦＥスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
IIZUKA, Yukinori (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
ＪＦＥスチール株式会社 (〒11 東京都千代田区内幸町二丁目２番３号 Tokyo, 〒1000011, JP)
MATSUI, Yutaka (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
松井 穣 (〒11 東京都千代田区内幸町二丁目２番３号ＪＦＥスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
IIZUKA, Yukinori (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
International Classes:
G01N29/06; G01B17/00; G01N29/44
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JFE Techno-Research Corporation 7th Floor, Yanagiya Building, 1-10, Nihonbashi 2-chome, Chuo-k, Tokyo 27, 〒1030027, JP)
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Claims: