Pipeline monitoring device and system based on distributed fiber sensors and acoustic wave

Abstract

The invention discloses a pipeline monitoring device and system based on distributed fiber sensors and acoustic wave. The device comprises a pipeline (21); distributed fiber sensors (22) are laid in a monitoring area of the pipeline (21); acoustic sensor units (23) are installed at two ends of the pipeline (21) or on the pipeline (21) section by section; the device further comprises an optical power detection module (24 and 25) and an acoustical signal receiving and processing device (26); the monitoring area of the pipeline refers to at least one of the outside of the pipeline, the outer wall surface of the pipeline, the inside of the outer wall of the pipeline and the inside of the pipeline. The pipeline monitoring device and system based on the distributed fiber sensors and acoustic wave has the advantages that the distributed fiber sensing technique and the acoustic sensing technique are combined, detection results of the distributed fiber sensors and those of the acoustic sensor units are comprehensively considered, the distributed fiber sensing technique and the acoustic sensing technique are mutually complementary, high-reliability detection is achieved, false alarm rate is reduced, and positioning precision is improved.

Description

[0001] technical field [0002] The invention relates to a pipeline monitoring device and system, in particular to a pipeline monitoring device and system based on distributed optical fiber sensors and acoustic waves, which are used for real-time on-line monitoring of pipeline leakage to realize accurate automatic early warning. [0003] Background technique [0004] With the improvement of social economy and people's living standards, there are more and more various building groups, and the supporting water, electricity, heating, gas and other pipelines, wires and cables, and communication optical cables and other pipelines extend underground. Security is an important part that cannot be ignored in urban construction. [0005] At present, external detection methods can be used for pipeline leakage monitoring, mainly including negative pressure wave detection method and acoustic emission detection method. The negative pressure wave detection method can quickly determine th...

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Problems solved by technology

[0011] However, although the distributed optical fiber can monitor the whole line, that is, every point can be sensed, in the application of underground pipeline monitoring across a wide area and the construction environment is uncertain, but due to the overly sensitive characteristics of the distributed optical fiber, it is easy to cause false alarms The occurrence of the situation has a high false alarm rate of the system and poor anti-interference ability

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