Title:
WELDED STATE MONITORING DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2009/057830
Kind Code:
A9
Abstract:
A welded state monitoring device and method for monitoring on-line the state of an electric-resistance welded pipe, such as the welded state, or the butted state, more correctly than conventional. A mirror (23) provided at a one-end portion in a case (21) receives light emitted from a welded portion (5) of a cylindrical steel sheet (1) sideways through heat-resistance glass (22) to project the image of the welded portion (5) toward a relay lens (24) provided to the root-end portion in a relay lens unit (13). The relay lens (24) transmits the image of the welded portion (5) to a converter lens (12), and the converter lens (12) forms the image onto the imaging surface of a CCD camera (11). Therefore, the welded portion (5) can be imaged sideways with a resolution corresponding to the resolution of the CCD camera (11), and information on the welded portion (5) can be collected on-line more correctly than conventional.
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Inventors:
HASEGAWA NOBORU (JP)
HAMATANI HIDEKI (JP)
MUKAI MICHIMASA (JP)
YAMAMOTO KAZUTO (JP)
MIYAKAWA TAKASHI (JP)
HAMATANI HIDEKI (JP)
MUKAI MICHIMASA (JP)
YAMAMOTO KAZUTO (JP)
MIYAKAWA TAKASHI (JP)
Application Number:
PCT/JP2008/070361
Publication Date:
June 13, 2013
Filing Date:
October 31, 2008
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
HASEGAWA NOBORU (JP)
HAMATANI HIDEKI (JP)
MUKAI MICHIMASA (JP)
YAMAMOTO KAZUTO (JP)
MIYAKAWA TAKASHI (JP)
HASEGAWA NOBORU (JP)
HAMATANI HIDEKI (JP)
MUKAI MICHIMASA (JP)
YAMAMOTO KAZUTO (JP)
MIYAKAWA TAKASHI (JP)
International Classes:
B23K13/08; B21C37/08; B21C51/00; B23K13/00; B23K31/00; G01J5/48; G01N21/71; B23K101/06
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Atsushi Aoki (JP)
Atsushi Aoki (JP)
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Claims: