Underground pipe network leak detection method

Abstract

The invention discloses an underground pipe network leak detection method. The underground pipe network leak detection method includes following steps: a, performing infrared, ultraviolet or terahertz camera shooting on an area where a pipeline is located; b, performing gray processing on a captured image, identifying gradient change in the image by using an edge detection method based on an isoline principle so as to identify gradient change of temperature or inert gas concentration in the filmed area, and confirming the boundary of a temperature jump area where temperature jump exists or the boundary of an inert gas concentration jump area where inert gas concentration jump exists according to preset gradient jump change threshold value; c, confirming an underground pipe network leak area according to the boundary of the temperature jump area or the boundary of the inert gas concentration jump area. The underground pipe network leak detection method can rapidly and accurately confirm underground pipe network leak points.

Description

technical field [0001] The invention relates to a method for detecting leakage of an underground pipe network. Background technique [0002] Material leakage in the underground pipe network is an inevitable problem. The leakage of the water supply pipe network will cause waste of water resources; the leakage of the sewage pipe network will pollute the groundwater quality, and the infiltration of groundwater in the sewage pipe network will also increase the operating costs of the sewage treatment plant. The leakage of the gas and oil pipeline network will cause the loss of personnel and property; the leakage of the heat pipeline network will also cause a waste of energy. Therefore, the invention of underground pipe network leak detection method is very important. [0003] The current leakage detection methods of underground water supply pipe network are basically empirical judgment, listening method and correlation method detection, combined with regional flow measurement to...

AI Technical Summary

Problems solved by technology

However, the effective detection of water leakage in the water supply pipe network, especially the detection of water leakage in ultra-deep, large-diameter, non-metallic pipes, has always been a worldwide problem. The International Water Association has been collecting water leakage detection methods worldwide for nearly 10 consecutive years , but no effective technique has been found

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