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. 16, 2026
Filed:
Jul. 06, 2023
Yokogawa Electric Corporation, Tokyo, JP;
Toyota School Foundation, Aichi, JP;
Yoshihiro Kumagai, Musashino, JP;
Shin-Ichirou Tezuka, Musashino, JP;
Satoshi Matsuura, Musashino, JP;
Kazuya Saito, Nagoya, JP;
Yokogawa Electric Corporation, Tokyo, JP;
TOYOTA SCHOOL FOUNDATION, Aichi, JP;
Abstract
A temperature measuring deviceincludes a spectrum data acquirerconfigured to acquire spectrum data that indicates a spectrum of Brillouin scattered light generated by causing light to be incident on an optical fiber FUT, a spectrum data analyzerconfigured to analyze the spectrum data and to obtain a Brillouin frequency shift amount, a correctorconfigured to predict an amount of change in the Brillouin frequency shift amount due to structural relaxation of the optical fiber FUT from a thermal history of the optical fiber FUT, and configured to correct the Brillouin frequency shift amount obtained by the spectrum data analyzerusing the predicted amount of change, and a temperature calculatorconfigured to obtain a temperature of the optical fiber FUT on the basis of the Brillouin frequency shift amount corrected by the corrector