Leakage point locating system of optical fiber sensing natural gas pipeline leakage monitoring system

Abstract

The invention relates to a leakage point locating system of an optical fiber sensing natural gas pipeline leakage monitoring system. The leakage point locating system comprises a light source, a transmission light path part, optical fiber sensors, a photoelectric detector, and a signal collection and processing module; the optical fiber sensors are arranged on a pipe body at certain intervals, an optical fiber sensor group consists of the optical fiber sensors, and each sensor is connected to the light source and the photoelectric detector through the transmission light path and an output of the photoelectric detector is serially connected with a signal conditioning unit, a signal collection unit and a processing unit in the signal collection and processing module; a display terminal and an external interface are arranged in the output of the processing unit; the output of the signal collection and processing module is connected with a microcomputer through an external interface. The leakage point locating system of the optical fiber sensing natural gas pipeline leakage monitoring system provided by the invention can monitor either emergent or transmitted leakage signals, and has the advantages of good locating accuracy, stable property and the like.

Description

technical field [0001] The invention relates to a leakage point positioning system of an optical fiber sensor natural gas pipeline leakage monitoring system for accurately locating the position of the pipeline leakage point, and relates to the technical fields of mechanical vibration measurement, impact measurement and pipeline system. Background technique [0002] At present, the total length of pipelines built in the world has reached 2.5 million kilometers, which has surpassed the total mileage of railways and has become the main mode of energy transportation in the world. Oil transportation in developed countries and oil-producing regions in the Middle East has all realized pipelines. my country's pipelines have also developed rapidly in recent years, with a total length of more than 70,000 kilometers. A large energy pipeline network has initially formed across the east, west, north and south, covering the whole country, and connecting overseas. Pipeline transportation ha...

AI Technical Summary

Problems solved by technology

[0012] In view of the problems of low sensitivity, high false alarm rate, and susceptibility to environmental factors in the above-mentioned types of leak detection and monitoring technologies, the present invention provides a high-sensitivity quasi-distributed leak event monitoring and positioning method and system based on optical fiber sensing , the use of high-sensitivity sensors makes it possible to detect in time the primary stage of leakage such as micro-leakage and seepage in the pipeline, and accurately calculate the location of the leakage event based on the time delay when the signal of the leakage event propagates to several adjacent sensors. This technical solution overcomes the shortcomings of poor accuracy and complex installation process in the previous monitoring technology, and the positioning is accurate

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