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:
Jul. 10, 2018
Filed:
Jun. 16, 2015
Applicant:
Yokogawa Electric Corporation, Musashino-shi, Tokyo, JP;
Inventor:
Nobuaki Takeuchi, Tokyo, JP;
Assignee:
YOKOGAWA ELECTRIC CORPORATION, Musashino-shi, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J 5/08 (2006.01); G01K 3/06 (2006.01); G01K 3/14 (2006.01); G01K 13/00 (2006.01); G01K 11/32 (2006.01);
U.S. Cl.
CPC ...
G01K 11/32 (2013.01); G01K 2011/322 (2013.01); G01K 2011/324 (2013.01);
Abstract
An optical fiber temperature distribution measuring device includes: an optical fiber as a sensor; a calculation control unit for measuring a temperature distribution along the optical fiber based on an intensity ratio between Stokes light and anti-Stokes light of backward Raman scattered light from the optical fiber; and a temperature correction unit for correcting the temperature distribution by using temperature dependence of a loss difference between the Stokes light and the anti-Stokes light.