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Title:
MONITORING SYSTEM, MONITORING DEVICE, MONITORING METHOD, AND NON-TRANSITORY COMPUTER-READABLE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2020/202654
Kind Code:
A1
Abstract:
A monitoring system according to the present disclosure is provided with: an optical fiber (10) installed in the ground or on the seabed; an optical fiber sensing unit (21) which receives an optical signal from the optical fiber (10), and detects, on the basis of the optical signal, a vibration generated in the ground or on the seabed; and an analysis unit (22) which specifies, on the basis of the unique pattern of the detected vibration, a natural phenomenon causing the generation of the detected vibration.

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Inventors:
YODA YUKIHIDE (JP)
AONO YOSHIAKI (JP)
ASAHI KOJI (JP)
Application Number:
PCT/JP2019/049060
Publication Date:
October 08, 2020
Filing Date:
December 13, 2019
Export Citation:
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Assignee:
NEC CORP (JP)
International Classes:
G01V1/00; G01H9/00; G01V8/16
Foreign References:
JP2001221684A2001-08-17
JPS5728278A1982-02-15
JPS6246831B21987-10-05
JP4660645B22011-03-30
US20190033543A12019-01-31
JP2019068644A2019-04-25
Other References:
TSUNEO OHSUMI, TAKAHIKO NAGAYAMA, TOMOHIRO MAKINOU: "Study of detection system for debris flows, earthquakes and noise by vibration sensor", JOURNAL OF THE JAPAN SOCIETY OF EROSION CONTROL ENGINEERING, vol. 59, no. 3, 15 September 2006 (2006-09-15), pages 38 - 43, XP009529743, ISSN: 0286-8385, DOI: 10.11475/sabo1973.59.3_38
KAZUHIKO FUJIHASHI, MICHIYA MIYAMOTO, KOICHI OKUTSU, DAI OKUTSU: "Initiatives in disaster prevention field using optical fiber sensing technology", NTT GIJUTSU JOURNAL, vol. 19, no. 9, 30 November 2006 (2006-11-30), JP, pages 52 - 56, XP009529744, ISSN: 0915-2318
See also references of EP 3951333A4
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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