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:
Oct. 20, 2026
Filed:
May. 06, 2022
Ntt, Inc., Tokyo, JP;
NTT, Inc., Tokyo, JP;
Abstract
An optical fiber sensing device is presented which includes an analysis circuit that executes obtaining a change rate of a spectral shift by time-differentiating a measured spectrum shift, detecting a discontinuity point of the spectrum shift from the change rate, calculating a predicted value of the change rate for the discontinuity point, estimating an estimated value of the change rate at the discontinuity point by applying a Kalman filter to the change rate at the discontinuity point and the predicted value at the discontinuity point, and acquiring a corrected spectrum shift by time-integrating the change rate other than the discontinuity point and the estimated value estimated at the discontinuity point.
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