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:
Aug. 13, 2013
Filed:
Sep. 17, 2008
Junichi Nakagawa, Tokyo, JP;
Tadayuki Ito, Tokyo, JP;
Tetsuo Nishiyama, Tokyo, JP;
Masahiro Doki, Tokyo, JP;
Kozo Saito, Lexington, KY (US);
Belal Gharaibeh, Lexington, KY (US);
Keng Hoo Chuah, Lexington, KY (US);
Ahmad Salaimeh, Lexington, KY (US);
Masahiro Yamamoto, Tokyo, JP;
Tomoya Takeuchi, Tokyo, JP;
Kazufumi Ito, Raleigh, NC (US);
Huaxiong Huang, Markham, CA;
Sean C. Bohun, Oshawa, CA;
Junichi Nakagawa, Tokyo, JP;
Tadayuki Ito, Tokyo, JP;
Tetsuo Nishiyama, Tokyo, JP;
Masahiro Doki, Tokyo, JP;
Kozo Saito, Lexington, KY (US);
Belal Gharaibeh, Lexington, KY (US);
Keng Hoo Chuah, Lexington, KY (US);
Ahmad Salaimeh, Lexington, KY (US);
Masahiro Yamamoto, Tokyo, JP;
Tomoya Takeuchi, Tokyo, JP;
Kazufumi Ito, Raleigh, NC (US);
Huaxiong Huang, Markham, CA;
Sean C. Bohun, Oshawa, CA;
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Abstract
A defect on the surface or in the surface layer of a moving material can be detected by using a method comprising steps of: heating the surface of the material, obtaining thermal image data of the surface of the material using an infrared thermography camera while the surface of the material is being heated up at the heating step or being cooled down after heating, and detecting the defect by calculating Laplacian with respect to temperature of the surface represented by the thermal image data. When the thermal image data is obtained while the material is being heated up, a heating device and the camera is arranged so that thermal energy emitted from the heating device is reflected by the material to come into the camera.