A method for detecting faults in sewer pipes
A fault detection and pipeline technology, applied in the pipeline system, gas/liquid distribution and storage, mechanical equipment, etc., can solve the problems of sewer pipeline blockage fault detection, etc., to remove low-resolution components, optimize the detection process, and improve accuracy effect on reliability
Active Publication Date: 2019-04-12
KUNMING UNIV OF SCI & TECH
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Problems solved by technology
[0003] In order to solve the problem of sewer pipe blockage fault detection, the invention provides a sewer pipe fault detection method
Method used
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Embodiment 1
[0038] Embodiment 1: a sewer pipeline fault detection method, which is verified with data from the pipeline laboratory of the University of Bradford, UK. The pipe length is 15.4 meters, the pipe material is clay pipe, and the diameter is 150mm. The experimental data of 0.1s is selected as an example (since the signal can go back and forth to the pipeline for multiple times within 0.1s, carrying rich information in the pipeline, it has met the detection requirements).
[0039] The specific process of computer signal processing is as follows:
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The invention discloses a detecting method for sewer pipeline failures. The detecting method for the sewer pipeline failures comprises the following steps that a detecting device for the sewer pipeline failures is installed; acoustic response signals of a known pipeline failure-free section / large blocking pipeline / small blocking pipeline / repeated blocking pipeline / leading pipeline are obtained; signal framing is conducted; an energy entropy index, a sample entropy index and a fractal box dimension index of all signal frames are calculated; distinction degree indexes of a energy entropy characteristic set, a sample entropy characteristic set and a fractal box dimension characteristic set are calculated; the new energy entropy characteristic set with the distinction degree index being less than 0.2 is removed, a new energy entropy characteristic set, a new sample entropy characteristic set and a new fractal box dimension characteristic set are obtained, and new characteristic sets are recombined; a random forest classifier is trained with the adoption of recombined characteristic set, and a failure identification model is obtained. According to the detecting method for the sewer pipeline failures, accuracy and reliability of the detecting result are improved.
Description
technical field [0001] The invention relates to a sewer pipeline fault detection method, which belongs to the field of pipeline fault detection. Background technique [0002] The level of urbanization in my country is constantly improving. With the development of urban economy, the length of sewer pipes shows a trend of accelerated growth every year. However, due to defects in the original design or long-term use, the failure rate of sewer pipes is also very high. Among them, the blockage of pipelines is a hidden danger that threatens the safe drainage of cities. If pipeline failures cannot be detected and eliminated in time, the normal operation of urban water supply and drainage will be affected. Therefore, an efficient and accurate sewer pipe blockage detection method is very necessary for pipeline fault detection. Contents of the invention [0003] In order to solve the problem of sewer pipe blockage fault detection, the invention provides a sewer pipe fault detection...
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IPC IPC(8): F17D5/06
CPCF17D5/06
Inventor 吴建德闫菁冯早王晓东范玉刚黄国勇邹金慧
Owner KUNMING UNIV OF SCI & TECH
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