Title:
QUICKSAND AMOUNT OBSERVATION SYSTEM, QUICKSAND AMOUNT OBSERVATION APPARATUS, QUICKSAND AMOUNT OBSERVATION METHOD, AND COMPUTER READABLE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2023/286147
Kind Code:
A1
Abstract:
A quicksand amount observation system according to the present disclosure is provided with: a metal pipe (10A) laid in a river; an optical fiber cable (20A) that is passed through the metal pipe (10); a communication unit (31A) that transmits an optical pulse to the optical fiber cable (20A) and receives, from the optical fiber cable (20A), back-scattered light generated in association with the optical pulse; a detection unit (32A) that detects, on the basis of a change in characteristics of the back-scattered light received by the communication unit (31A), collision noise generated as a result of collision between the metal pipe (10A) and quicksand; and a quicksand amount calculation unit (41A) that calculates the quicksand amount on the basis of characteristics of the collision noise detected by the detection unit (32A).
Inventors:
KOSHIO HIROAKI (JP)
Application Number:
PCT/JP2021/026258
Publication Date:
January 19, 2023
Filing Date:
July 13, 2021
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G01F1/00
Foreign References:
| JP2019002924A | 2019-01-10 | |||
| JPS6418055A | 1989-01-20 | |||
| JPS59148835A | 1984-08-25 |
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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