Title:
OPTICAL FIBER SENSING SYSTEM AND EVENT IDENTIFICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/075145
Kind Code:
A1
Abstract:
An optical fiber sensing system according to the present invention is provided with: an optical fiber (11) that is disposed in water and that detects a water pressure change caused by an event occurring in an observation region; a reception unit (20) that receives an optical signal from the optical fiber (11); and an identification unit (30) that detects a water pressure distribution and water pressure time fluctuation in the observation region on the basis of a pattern of the optical signal, and identifies the event occurring in the observation region on the basis of the detection result.
Inventors:
YANO YUTAKA (JP)
MISUMI EITARO (JP)
MISUMI EITARO (JP)
Application Number:
PCT/JP2020/031364
Publication Date:
April 22, 2021
Filing Date:
August 20, 2020
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G01D5/353; G01V1/00
Foreign References:
| JPH08128869A | 1996-05-21 | |||
| JP2017227501A | 2017-12-28 | |||
| JP2004251896A | 2004-09-09 | |||
| JP2004227045A | 2004-08-12 | |||
| JPH11248581A | 1999-09-17 | |||
| JP2006170920A | 2006-06-29 | |||
| JP2016008865A | 2016-01-18 | |||
| CN101825499A | 2010-09-08 |
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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