Multi-parameter optical fiber sensing detection method and system for down-conducting optical cable

Abstract

An embodiment of the present invention provides a multi-parameter optical fiber sensing detection method and system for a down-conducting optical cable. The method includes: the detection system sends a detection signal to a target fiber core in the down-conducting optical cable to be tested; Distributed optical fiber sensors are arranged along the line, fiber Bragg grating sensors and Fabry-Perot grating sensors are respectively arranged in the cable trench, and the fiber-optic Bragg grating sensors and Fabry-Perot grating sensors are respectively fused to the target fiber core through fiber couplers ; The detection system receives the spectral signal reflected from the target fiber core, and determines the comprehensive parameters of the downconducting optical cable to be tested according to the spectral signal. The multi-parameter optical fiber sensing detection method and system for down-conducting optical cables provided by the embodiments of the present invention can detect various parameters of down-conducting optical cables through the combination of distributed and point-type optical fiber sensors, and realize that the physical state of the down-conducting optical cables can be fully controlled. It is used to protect optical cables and realize safe and reliable operation and maintenance.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a multi-parameter optical fiber sensing detection method and system for downconducting optical cables. Background technique [0002] The optical cable under the cable pylon is easily affected by the external environment at the station and in the cable trench, which causes repeated changes in the stress intensity of the optical cable in the trench and steel pipe, resulting in aging and damage of the optical cable. [0003] After the optical cable enters the station, it will come into contact with the fittings and splice boxes of the tower. Due to the phenomenon of dancing and ice floes in the daily erection of the optical cable, a large pressure will appear at the contact position between the optical cable and the tower; Risk of damage to fiber optic cables or fittings. [0004] In the prior art, it is basically based on the separate deployment of optical fiber sensing or...

AI Technical Summary

Problems solved by technology

[0005] However, the manual inspection method has low detection efficiency, untimely detection, and high cost. When the cable body moves, the test results of the fiber grating will be inaccurate

Therefore, the accuracy of existing light sensing needs to be improved

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