Title:
OPTICAL FIBER SENSOR AND DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/044203
Kind Code:
A1
Abstract:
Provided is an optical fiber sensor that is capable of highly accurately detecting an abnormality in a structure from vibration information. This optical fiber sensor comprises an optical fiber that is laid in the vicinity of a structure, a light source for introducing pulsed light of a specific period into the optical fiber, and an optical sensor for detecting return light that has been obtained as a result of the introduction of the pulsed light into the optical fiber. The structure is determined to have an abnormality if the spectral centroid of vibration information exceeds a threshold.
Inventors:
MATSUDA YUMA (JP)
HINO TOMOYUKI (JP)
HINO TOMOYUKI (JP)
Application Number:
PCT/JP2020/032366
Publication Date:
March 03, 2022
Filing Date:
August 27, 2020
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G01H9/00; E01D22/00; G01M99/00
Domestic Patent References:
| WO2020044565A1 | 2020-03-05 |
Foreign References:
| JP2009229070A | 2009-10-08 | |||
| JP2010169465A | 2010-08-05 | |||
| US20020198669A1 | 2002-12-26 |
Attorney, Agent or Firm:
KITAJIMA Hiroshi et al. (JP)
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