Leakage monitoring and positioning method and system for pipeline laid with distributed optical fibers

Abstract

The invention relates to a leakage monitoring and positioning method for a pipeline laid with distributed optical fibers. The method comprises the steps of transmitting monitoring light waves to the distributed optical fibers through a circulator; arranging at least two monitoring points in the distributed optical fibers; laying the distributed optical fibers on the wall of the pipeline; receiving scattered light and monitoring data which are returned after the monitoring light waves pass through the at least two monitoring points when the monitoring light waves are transmitted in the distributed optical fibers through the circulator; sending the scattered light and the monitoring data to a photoelectric detector by the circulator, and storing the scattered light and the monitoring data into a server by the photoelectric detector; and carrying out leakage positioning on the pipeline by the server according to the scattered light and the monitoring data. Due to the fact that the server receives the scattered light and the monitoring data which are returned from the at least two monitoring points, leakage positioning is carried out on the pipeline through the scattered light and the monitoring data on the at least two monitoring points, and the monitoring precision of pipeline leakage can be improved.

Description

technical field [0001] The invention relates to the technical field of monitoring and positioning, in particular to a leakage monitoring and positioning method and system for pipelines laid with distributed optical fibers. Background technique [0002] With the rapid development of Internet technology, my country has entered the information age, and my country's optical fiber communication industry is also developing rapidly, resulting in an increasing number of optical fiber lines. Among them, distributed optical fiber vibration sensing technology uses highly coherent Rayleigh scattering in optical fibers The light interference phenomenon is sensitive to vibration characteristics, and realizes vibration sensing. The optical cable is arranged on the surface of the pipeline as a vibration sensor, and the leakage causes the pipeline to generate vibration waves, which act on the optical cable at the corresponding position and modulate the optical signal. When light travels in t...

AI Technical Summary

Problems solved by technology

[0003]There is a restrictive relationship between the measurement accuracy and spatial resolution of traditional distributed optical fibers, the detection signal is generally weak, and there is a problem of low measurement accuracy

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