The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 26, 2007
Filed:
Apr. 23, 2003
Toshifumi Kodama, Tokyo, JP;
Taira Suzuki, Chiba, JP;
Akira Torao, Chiba, JP;
Yasumasa Tekemura, Chita, JP;
Takatoshi Okabe, Chita, JP;
Toshifumi Kodama, Tokyo, JP;
Taira Suzuki, Chiba, JP;
Akira Torao, Chiba, JP;
Yasumasa Tekemura, Chita, JP;
Takatoshi Okabe, Chita, JP;
JFE Steel Corporation, Tokyo, JP;
Abstract
To precisely measure bead cutting shapes of electric resistance welded pipes without being affected by difference in luminance level between cut and uncut portions in optical cutting images, an image is obtained by overlaying an optical cutting image with the optical cutting image subjected to thinning processing. A profile of the welded pipe is approximated with a quadratic function and a region containing the bead apex coordinates is identified as the bead. Shape data of the pipe surface at the portion corresponding to the bead portion is obtained from the preset left and right boundaries of the bead portion and the apex position of the separately-calculated bead portion, and bead width, height, slope angle, and unevenness at the left and right boundaries between the bead portion and base pipe portion, are each calculated, based on the left and right bead shape approximation functions and base pipe shape approximation function.