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:
May. 07, 2024
Filed:
May. 29, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Yoshifumi Wakisaka, Musashino, JP;
Daisuke Iida, Musashino, JP;
Kunihiro Toge, Musashino, JP;
Tetsuya Manabe, Musashino, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
An object is to provide an optical fiber path search method, an optical fiber path search system, a signal processor, and a program that can be operated free of the effects of walls, supporting members, and the like so that only a signal generated by an acoustic wave propagating through the air can be extracted. An optical fiber path search system according to the present invention utilizes DAS and includes: a vibration sourceconfigured to provide an acoustic wave to a predetermined region; a light reflection measurement deviceconfigured to be connected to one end of an optical fiberand configured to measure vibration of a change in an optical path length from the other end of the optical fiberto a point in the optical fiberdue to the acoustic wave provided by the vibration source; and a signal processorconfigured to extract a signal component in a high frequency region higher than a preset cutoff frequency from a signal of the vibration of the change in the optical path length measured by the light reflection measurement deviceand calculate a distance between the vibration sourceand the point in the optical fiberusing the signal component.