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:
Jan. 25, 2011
Filed:
Sep. 21, 2007
Hidehiko Komeda, Tokyo, JP;
Tsuyoshi Igi, Tokyo, JP;
Yasushi Koyano, Kanagawa, JP;
Fumiyoshi Ohkubo, Kanagawa, JP;
Kazuaki Negishi, Kanagawa, JP;
Hidehiko Komeda, Tokyo, JP;
Tsuyoshi Igi, Tokyo, JP;
Yasushi Koyano, Kanagawa, JP;
Fumiyoshi Ohkubo, Kanagawa, JP;
Kazuaki Negishi, Kanagawa, JP;
J-Power Systems Corporation, Tokyo, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
An optical fiber temperature distribution measuring apparatus and a method for measuring optical fiber temperature distribution, provided with a light source for inputting a pulse light to an optical fiber to be measured, a signal detecting unit for detecting a received light intensity of a predetermined light included in a backscattering light generated by an input of the pulse light in the optical fiber to be measured, and a signal processing unit for calculating a value corresponding to a variation of the received light intensity due to a hydrogen molecular absorption of the optical fiber to be measured based on the received light intensity of the predetermined light, to compensate the received light intensity of the predetermined light corresponding to a temperature of the optical fiber to be measured based on the value.