Title:
POSITION EVALUATION DEVICE, POSITION EVALUATION METHOD, AND COMPUTER-READABLE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2023/228315
Kind Code:
A1
Abstract:
A position evaluation device (50) according to the present disclosure comprises: a vibration characteristics calculation unit (51) in which a signal indicating the characteristic vibration generated at each position of an optical fiber is input from a sensor and sensing data indicating the vibration characteristics of each position of the optical fiber is calculated on the basis of the input signal; a dissimilarity calculation unit (52) that calculates dissimilarity in the sensing data between two adjacent points in the optical fiber; and an environmental change position estimation unit (53) that uses the dissimilarity as a basis to estimate an environmental change position at which the environment of the optical fiber changes.
Inventors:
KOHNO WATARU (JP)
KONDO REISHI (JP)
MISHIMA SAKIKO (JP)
MATSUSHITA TAKASHI (JP)
HINO TOMOYUKI (JP)
KONDO REISHI (JP)
MISHIMA SAKIKO (JP)
MATSUSHITA TAKASHI (JP)
HINO TOMOYUKI (JP)
Application Number:
PCT/JP2022/021382
Publication Date:
November 30, 2023
Filing Date:
May 25, 2022
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G01H9/00
Domestic Patent References:
| WO2020044648A1 | 2020-03-05 | |||
| WO2020166057A1 | 2020-08-20 |
Foreign References:
| JP2019020143A | 2019-02-07 | |||
| JP2013072800A | 2013-04-22 | |||
| US20200319017A1 | 2020-10-08 |
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
Download PDF: