A method and device for locating the leakage position of hdpe membrane by using stress wave

Abstract

The invention discloses a method and device for locating the leakage position of an HDPE membrane through a stress wave. The method comprises the steps: employing a plurality of vibration detectors, laid under the HDPE membrane, for monitoring a stress wave generated during the cracking of the HDPE membrane, converting a received mechanical signal into an electric signal, and recording the arrivaltime of the stress wave; carrying out the modulation amplification and noise filtering of the electric signal through the signal conditioning circuit; transmitting the conditioned electric signal toa main control chip of a data collector for storage after the analog-digital conversion of the conditioned electric signal through an A / D conversion circuit; extracting the information in the data collector through a data processing terminal, carrying out the analysis of the information, so as to judge the generation moment of a new focus and obtain the coordinates of the cracking position of theHDPE membrane. According to the invention, the method can solve a problem of first pollution second discovery in a conventional method, and remarkably improves the resolution of a positioning model.

Description

technical field [0001] The invention relates to environmental monitoring and control engineering, in particular to a method and a device for locating the leakage position of an HDPE film by using stress waves. Background technique [0002] At present, the traditional on-line anti-seepage monitoring method of landfill is to lay a certain number of electrodes or lay grid-shaped conductive fibers under the HDPE film, and judge the leakage by measuring the potential difference at different locations or by measuring whether the conductive fibers are short-circuited. Position, and then determine the damage point of HDPE film. The advantages of these two methods are simple structure and convenient implementation. Among them, geomembrane electrical leakage position detection is the most reliable and effective on-site detection technology method in the current anti-seepage geomembrane leakage position detection. Electrode potential distribution difference, locate the leak point. P...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the main purpose of a method and device for locating HDPE film leakage position using stress waves of the present invention is to solve the shortcomings of traditional methods such as low resolution, existing equipment that cannot meet the requirements, and pollution first and then discovery. It can improve the problem that the old method first pollutes and then discovers, and significantly improves the resolution of the positioning model

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