Title:
IDENTIFICATION SYSTEM, IDENTIFICATION DEVICE, AND IDENTIFICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/193807
Kind Code:
A1
Abstract:
The present invention identifies sagging of an optical fiber. An identification system (1) comprises: a transmission means (131) for transmitting pulsed light via an optical fiber (10); a reception means (132) for receiving backscattering light of the pulsed light from the optical fiber (10); a detection means (133) for detecting, from the backscattering light, the condition of environment surrounding the optical fiber (10); and an identification means (320) for identifying sagging of the optical fiber (10) from a detection result by the detection means (133).
Inventors:
YODA YUKIHIDE (JP)
OGURA NAOTO (JP)
AONO YOSHIAKI (JP)
OGURA NAOTO (JP)
AONO YOSHIAKI (JP)
Application Number:
PCT/JP2021/012488
Publication Date:
September 30, 2021
Filing Date:
March 25, 2021
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G01M11/00; H04B10/071
Foreign References:
| JPH09105701A | 1997-04-22 | |||
| JP2006145465A | 2006-06-08 | |||
| JPH02187641A | 1990-07-23 |
Other References:
OKAMOTO, TATSUYA ET AL.: "Identification of sagging aerial cable section by measuring optical fiber vibration distribution", LECTURE PROCEEDINGS OF THE IEICE GENERAL CONFERENCE 2019, 2019, pages 303
Attorney, Agent or Firm:
SHIMOSAKA Naoki et al. (JP)
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