Title:
METHOD FOR IDENTIFYING POSITION OF ELECTRIC POLE FROM VIBRATION DISTRIBUTION WAVEFORM
Document Type and Number:
WIPO Patent Application WO/2024/057492
Kind Code:
A1
Abstract:
The purpose of the present disclosure is to make it possible to identify, without relying on visual inspection, the position of an electric pole from a vibration distribution waveform of an aerial optical fiber cable. The present disclosure provides a vibration analysis device and a vibration analysis method each of which identifies the position of an electric pole by carrying out, with a high-pass filter having a cutoff frequency that is higher than the spatial frequency of vibration of an aerial optical fiber cable, filtering on a vibration distribution waveform indicating change over time of a spatial distribution in the longitudinal direction of the vibration, and carrying out envelope detection of a filtering waveform obtained by the filtering.
Inventors:
OKAMOTO TATSUYA (JP)
IIDA DAISUKE (JP)
KOSHIKIYA YUSUKE (JP)
IIDA DAISUKE (JP)
KOSHIKIYA YUSUKE (JP)
Application Number:
PCT/JP2022/034580
Publication Date:
March 21, 2024
Filing Date:
September 15, 2022
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G01H9/00; G01D5/353
Domestic Patent References:
| WO2022176047A1 | 2022-08-25 | |||
| WO2020044648A1 | 2020-03-05 | |||
| WO2022087012A1 | 2022-04-28 | |||
| WO2020044660A1 | 2020-03-05 | |||
| WO2022180834A1 | 2022-09-01 |
Foreign References:
| JP2021156822A | 2021-10-07 | |||
| CN211234916U | 2020-08-11 | |||
| JP2020052030A | 2020-04-02 | |||
| US20170342814A1 | 2017-11-30 |
Other References:
OKAMOTO TATSUYA; IIDA DAISUKE; KOSHIKIYA YUSUKE; HONDA NAZUKI: "Deployment Condition Visualization of Aerial Optical Fiber Cable By Distributed Vibration Sensing Based On Optical Frequency Domain Reflectometry", JOURNAL OF LIGHTWAVE TECHNOLOGY, IEEE, USA, vol. 39, no. 21, 27 August 2021 (2021-08-27), USA, pages 6942 - 6951, XP011885509, ISSN: 0733-8724, DOI: 10.1109/JLT.2021.3107855
Attorney, Agent or Firm:
OKADA, Kenji et al. (JP)
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