Gas pipeline leakage detecting and positioning system and method based on non-intrusive sensor

Abstract

The invention discloses a gas pipeline leakage detecting and positioning system and method based on a non-intrusive sensor. The system comprises the non-intrusive infrasonic wave sensor, a timer, a signal conditioner, a filter, an analog-digital converter, a data transmission medium and a central control computer. The detecting and positioning method comprises the steps that the non-intrusive infrasonic wave sensor collects infrasonic wave signals when a gas pipeline leaks and infrasonic wave signals when a gaseous medium is propagated; the timer marks moments when the infrasonic wave signals are collected; the signal conditioner supplies power to the non-intrusive infrasonic wave sensor and performs signal conditioning; the filter performs filtering on the infrasonic wave signals; the analog-digital converter converts electric signals collected by the sensor into digital signals, and the converted digital signals are transmitted to the central control computer through the data transmission medium for data storage and analysis. According to the gas pipeline leakage detecting and positioning system and method based on the non-intrusive sensor, cost is low, and sensitivity is high; it is avoided that the pipeline is perforated for installing the system, so that the running state of the existing pipeline is not affected, and adaptability is high.

Description

technical field [0001] The invention relates to the technical field of gas pipeline fault diagnosis and flow safety guarantee, in particular to a gas pipeline leakage detection and positioning system and method based on non-interventional sensors. Background technique [0002] With the large-scale laying of gas pipelines, pipeline leakage due to corrosion, cracks, fatigue damage and third-party damage occurs from time to time, which not only causes energy waste, pollutes the environment, but also endangers people's lives and health. Especially when the gas in the gas pipeline is flammable, explosive or toxic gas, it is a key issue in the gas pipeline leak detection to be able to timely and accurately find the leak and precisely locate the location of the leak. [0003] Gas pipeline leak detection methods currently include mass / volume balance method, applied statistics method, negative pressure wave method, transient model method, distributed optical fiber method and acoustic...

AI Technical Summary

Problems solved by technology

[0012] Existing patents rarely involve non-intrusive detection and single-sensor positioning, and no patents have been found on the detection of gas pipeline leaks based on non-invasive infrasonic sensors to detect the leakage acoustic signal transmitted by the medium inside the pipeline or the infrasonic signal transmitted along the pipe wall , and found no patents on positioning based on two signals collected by non-intrusive infrasonic sensors

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