Pipe monitoring system and monitoring method based on microstructure optical fiber distributive sensing

Abstract

The invention discloses a pipe monitoring system and monitoring method based on microstructure optical fiber distributive sensing. The system comprises a distributive sound wave sensing subsystem, a prewarning identification subsystem, and microstructure optical fibers laid on pipes to be monitored; the distributive sound wave sensing subsystem is used for generating signal light, injecting the signal light into the microstructure optical fibers, and detecting reflecting signal light to obtain phase information and position information of the reflecting signal light through demodulation; the prewarning identification subsystem is used for judging the pipe health conditions according to the phase information and further identifying pipe abnormal modes or prewarning the pipe corrosion conditions; and the microstructure optical fibers are used for transmitting the signal light and generating the reflecting signal light with pipe sound wave or vibration information. The system can synchronously realize monitoring and prewarning, is high in monitoring sensitivity and positioning precision, and meanwhile, is high in response frequency to abnormal events.

Description

technical field [0001] The invention belongs to the field of distributed acoustic wave sensing systems, and more specifically relates to a pipeline monitoring system and monitoring method based on microstructure optical fiber distributed sensing. Background technique [0002] Pipeline transportation has the characteristics of safety, convenience and economy, but pipeline failure accidents may occur due to external disturbance, corrosion, pipe material and construction quality and other reasons. In order to ensure the safety of pipeline transportation, it is necessary to monitor the health status of the pipeline in real time to deal with the serious consequences caused by pipeline corrosion and stress failure. The distributed optical fiber sensing technology developed in recent years has become a new method for pipeline health monitoring at home and abroad due to its advantages of long distance, high sensitivity, passive corrosion resistance and online detection, and has deve...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects and improvement needs of the prior art, the present invention provides a pipeline monitoring system and monitoring method based on micro-structure optical fiber distributed sensing, the purpose of which is to monitor the dynamic health status of the pipeline in real time, thus solving the sensitivity of the prior art Low, poor positioning accuracy, low incident response frequency, detection of technical problems that affect pipeline work, and inability to monitor and warn in real time throughout the day

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