Title:
OPTICAL FIBER SENSING SYSTEM, OPTICAL FIBER SENSING DEVICE, AND BREAKAGE DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2024/057379
Kind Code:
A1
Abstract:
An optical fiber sensing system according to the present disclosure comprises: an optical fiber (10); a communication unit (21) that transmits pulse light to the optical fiber (10) and receives an optical signal from the optical fiber (10); a distal end sensing unit (22) that continuously or regularly senses the distal end position of the optical fiber (10) on the basis of the optical signal received from the optical fiber (10); and a breakage sensing unit (23) that determines that the optical fiber (10) has broken if the difference between the distal end position detected by the distal end sensing unit (22) and the initial value of the distal end position exceeds a prescribed value.
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Inventors:
IWANO TADAYUKI (JP)
YODA YUKIHIDE (JP)
YODA YUKIHIDE (JP)
Application Number:
PCT/JP2022/034145
Publication Date:
March 21, 2024
Filing Date:
September 13, 2022
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G01D5/353; G01M11/00
Domestic Patent References:
| WO2020044659A1 | 2020-03-05 | |||
| WO2019235152A1 | 2019-12-12 | |||
| WO2020044660A1 | 2020-03-05 |
Foreign References:
| JP2004322745A | 2004-11-18 | |||
| JP2005017166A | 2005-01-20 | |||
| JP2008067467A | 2008-03-21 | |||
| JPH09181384A | 1997-07-11 | |||
| JP2013138121A | 2013-07-11 |
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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