OPTICAL FIBER SENSING SYSTEM, OPTICAL FIBER SENSING APPARATUS, AND UNDERGROUND ACTIVITY MONITORING METHOD

Title:

OPTICAL FIBER SENSING SYSTEM, OPTICAL FIBER SENSING APPARATUS, AND UNDERGROUND ACTIVITY MONITORING METHOD

Document Type and Number:

WIPO Patent Application WO/2021/005649

Kind Code:

A1

Abstract:

This optical fiber sensing system comprises an optical fiber (10A) that detects underground vibrations, an acquisition unit (21) that acquires, from the optical fiber (10A), an optical signal onto which the vibration detected by the optical fiber (10A) has been superimposed, and an identification unit (22) that identifies suspicious underground activity on the basis of the vibration pattern of the optical signal acquired by the acquisition unit (21).

More Like This:

JP6715938	2-channel laser audio monitoring system
WO/2014/066922	METHOD AND DEVICE FOR LASER-OPTICAL DETECTION OF A SURFACE MOVEMENT OF A SAMPLE
JP6461178	A device for measuring the vibration amplitude of a wire bonder capillary

Inventors:

KOJIMA TAKASHI (JP)

Application Number:

PCT/JP2019/026831

Publication Date:

January 14, 2021

Filing Date:

July 05, 2019

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NEC CORP (JP)

International Classes:

G01H9/00; G08B13/16

Domestic Patent References:

WO2014170013A1

2014-10-23

Foreign References:

CN103824406A	2014-05-28
US20120130930A1	2012-05-24
JP2008234551A	2008-10-02
CN109427161A	2019-03-05

Attorney, Agent or Firm:

IEIRI Takeshi (JP)

Download PDF:

View/Download PDF PDF Help

Previous Patent: INFORMATION RECOMMENDATION DEVICE, INFORMATION RECOMMENDATION SYSTEM, INFORMATION RECOMMENDATION MET...

Next Patent: SERVO AMP