Underground pipeline leakage point positioning method based on combination of amplitude fading and correlative detection

Abstract

The invention discloses an underground pipeline leakage point positioning method based on the combination of amplitude fading and correlative detection. The method includes the steps that the range where the leakage point is located is narrowed down quickly through an amplitude fading mode at first, and the leakage point is positioned roughly; two pickup probes are arranged on a metal pipeline to be detected, the probes collect the water leaking sound amplitude of the leakage point, and accordingly the approximate position of the leakage point is judged, and the search range of the leakage point is narrowed to the greatest extent; the accurate position of the leakage point is determined through a correlative detection method; and the difference between the time when the water leaking sound is spread to the left probe and the time when the water leaking sound is spread to the right probe is supposed as t, the interval between the two probes is d, the spreading speed of sound waves in the water pipeline is v, and the distance X1 between the left probe and the leakage point is equal to (d-v*t)/2. The underground pipeline leakage point positioning method based on the combination of amplitude fading and correlative detection has the beneficial effects of being simple, high in precision and low in cost.

Description

technical field [0001] The invention belongs to the technical field of underground pipeline detection and pressure pipeline leakage point location, and relates to an underground pipeline leakage point location method based on the combination of amplitude attenuation and correlation detection. Background technique [0002] The leakage problem of various underground pipeline networks such as water supply, oil transportation and natural gas is a major problem that needs to be solved urgently in the fields of energy saving and safety. According to statistics, at present, the leakage rate of water supply pipe network in more than half of the cities in the country is higher than the national standard. The leakage of oil and natural gas pipelines is a big problem involving the safety of people's lives and properties. A key link to prevent and reduce leakage consumption is leak detection. At present, there is no simple and low-cost method for detecting leaks in underground pipeline...

AI Technical Summary

Problems solved by technology

Leak detection is a key link in preventing and reducing leakage consumption. At present, there is no simple and low-cost method for detecting leaks in underground pipelines. Therefore, a leak detector that is simpler, more cost-effective, suitable for popularization and can actively detect leaks is designed. Has significant social and economic benefits

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