Title:
COHERENT AND POLARIZATION FADING SUPPRESSION METHOD FOR SYNCHRONOUS MONITORING OF LOSS AND VIBRATION
Document Type and Number:
WIPO Patent Application WO/2022/227948
Kind Code:
A1
Abstract:
The present invention relates to a coherent and polarization fading suppression method for synchronous monitoring of loss and vibration. When only a common single-mode sensing optical fiber is used, the conflict of a Φ-OTDR and a COTDR on a polarization state problem is solved on the basis of a polarization diversity measurement method. In addition, for loss parameter monitoring, not only can a better coherent fading noise suppression effect be obtained, but also the recognition capability of a small-loss event can be enhanced. Furthermore, for disturbance parameter monitoring, the influence of coherent fading on phase demodulation of the Φ-OTDR can be suppressed, and a vibration signal can be reconstructed in a high-fidelity manner, so that a false alarm rate of external disturbance early warning is effectively reduced.
Inventors:
ZHANG YIXIN (CN)
CHEN XIAOHONG (CN)
ZHANG XUPING (CN)
TONG SHUAI (CN)
LIANG LEI (CN)
WAN YIMING (CN)
WANG FENG (CN)
CHEN XIAOHONG (CN)
ZHANG XUPING (CN)
TONG SHUAI (CN)
LIANG LEI (CN)
WAN YIMING (CN)
WANG FENG (CN)
Application Number:
PCT/CN2022/082419
Publication Date:
November 03, 2022
Filing Date:
March 23, 2022
Export Citation:
Assignee:
UNIV NANJING (CN)
International Classes:
G01M11/02; G01D5/353; G01H9/00
Foreign References:
| CN113176075A | 2021-07-27 | |||
| CN112595492A | 2021-04-02 | |||
| CN111609919A | 2020-09-01 | |||
| US20160187224A1 | 2016-06-30 |
Attorney, Agent or Firm:
RZBC PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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