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. 29, 2010
Filed:
May. 30, 2007
Hidetaka Kawauchi, Hitachi, JP;
Masaki Ogura, Hitachi, JP;
Juhyun Yu, Hitachi, JP;
Akihiro Hiruta, Hitachi, JP;
Hidetaka Kawauchi, Hitachi, JP;
Masaki Ogura, Hitachi, JP;
Juhyun Yu, Hitachi, JP;
Akihiro Hiruta, Hitachi, JP;
Hitachi Cable, Ltd., Tokyo, JP;
Abstract
An optical fiber temperature sensing device has a sensor body; a light source housed in the sensor body; a temperature measuring optical fiber disposed outside the sensor body and extended to a temperature measurement site, wherein, when a light is emitted from the light source into the temperature measuring optical fiber, Stokes light intensity and anti-Stokes light intensity of backscattered light generated in the temperature measuring optical fiber are detected to determine a temperature at the temperature measurement site; a reference temperature optical fiber disposed inside the sensor body; and a controller that is operable to control an output of the light source by monitoring Stokes light intensity and anti-Stokes light intensity of backscattered light generated in the reference temperature optical fiber.