Acoustic detection system and method for chronic leakage of water supply pipeline

Abstract

The invention discloses an acoustic detection system and method for chronic leakage of a water supply pipeline. The system comprises a first sound wave sensor and a second sound wave sensor which are respectively arranged on the water supply pipeline at two ends of a leakage point to be detected; a sound wave data acquisition card which is electrically connected with the first sound wave sensor and the second sound wave sensor; and a sound wave data processing device which is in communication connection with the sound wave data acquisition card, can receive two groups of sound wave signals, acquired by the sound wave data acquisition card through the first sound wave sensor and the second sound wave sensor, of the water supply pipeline at the two ends of the to-be-detected leakage point, performs de-noising processing on the two groups of sound wave signals to obtain two groups of leakage sound wave signals, and performs cross-correlation delay estimation processing and positioning on the two groups of leakage sound wave signals to obtain the position of a leakage point on the water supply pipeline. The hardware of the system is simplified, the actual application range of acoustic leakage detection is expanded, low-pressure and small-flow chronic leakage can be found in time and positioned accurately, market requirements are met, the safety of drinking water is guaranteed, and the waste of water resources is reduced.

Description

technical field [0001] The invention relates to the field of pipeline chronic leakage detection, in particular to an acoustic detection system and method for chronic leakage of water supply pipelines. Background technique [0002] The water supply pipe network is an important part of the municipal infrastructure, but due to third-party factors such as the aging of the pipe network, corrosion, geological disasters, construction, etc., the leakage of the water supply pipe network occurs frequently. As many pipe networks come to the end of their useful life, the leakage problem of the pipe network may become more serious. [0003] The existing detection method is to use a correlator for detection. When the water supply pipeline leaks, the leakage noise will propagate along the pipeline to both ends. Since the sensors at both ends of the pipeline arrive at different times, there is a time difference, and then the measured pipeline length on site , the diameter of the pipe, inpu...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems existing in the prior art, the object of the present invention is to provide an acoustic detection system and method for chronic leakage of water supply pipelines, which can solve the existing method of using a correlator for pipeline leakage detection, which has the problems of expensive correlator and interference information. It cannot be effectively removed, which affects the accuracy of detection and the low-pressure pipeline leak detection effect is not good, etc.

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