Multi-parameter optical fiber sensing detection method and system of leading-down optical cable

Abstract

The embodiment of the invention provides a multi-parameter optical fiber sensing detection method and system for a leading-down optical cable. The method comprises the steps that a detection system sends a detection signal to a target fiber core in a to-be-detected leading-down optical cable; a distributed optical fiber sensor is arranged along the line of the leading-down optical cable to be measured, and an optical fiber Bragg grating sensor and a Fabry-Perot grating sensor are arranged in the cable trench respectively and are welded to a target fiber core through optical fiber couplers respectively; the detection system receives a spectral signal reflected from the target fiber core, and determines comprehensive parameters of the to-be-detected leading-down optical cable according to the spectral signal. According to the multi-parameter optical fiber sensing detection method and system for the leading-down optical cable, multiple parameters of the leading-down optical cable are detected in a mode of combining distributed optical fiber sensors and point type optical fiber sensors, the physical state of the leading-down optical cable is fully visible, the leading-down optical cable is protected, and safe and reliable operation and maintenance are achieved.

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...

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Problems solved by technology

[0005] However, the manual inspection method has low detection efficiency, untimely detection, and high cost. When the cable body m

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