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A detection method for clogged drainage pipes

A technology for drainage pipelines and detection methods, applied in pipeline systems, instruments, calculations, etc., can solve problems such as detection of drainage pipeline blockage faults, achieve reliable extraction results, optimize detection processes, and improve accuracy and reliability.

Active Publication Date: 2019-04-09
KUNMING UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of fault detection of drainage pipe blockage, the present invention provides a detection method for drainage pipe blockage fault

Method used

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  • A detection method for clogged drainage pipes
  • A detection method for clogged drainage pipes
  • A detection method for clogged drainage pipes

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Embodiment 1

[0031] Example 1: A detection method for clogged drainage pipes, using the data of the pipe laboratory of the University of Bradford, UK for example verification. 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).

[0032] The specific process of computer signal processing is as follows:

[0033] Signal extraction: the experimental procedure is attached figure 2 shown. Before the detection, in order to obtain the training data of the normal pipeline, the blocked pipeline, and the two working conditions, a section of the pipeline without faults is selected for detection. The computer obtains the training signal of the normal pipeline, such as image 3 shown. Then artificially place obstacles in this normal pip...

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Abstract

The invention discloses a detection method for clogged faults of drainage pipes. The method is: install a detection device for the clogged fault of the drainage pipe; select the known non-faulty section of the pipeline / pipeline faulty section for detection, and the computer obtains the signals under the two working conditions from the receiving end; obtains the sound of the drainage pipeline under the two working conditions. Response signal; conduct SVD decomposition of acoustic response signal; extract energy entropy index and approximate entropy index, and combine the extraction results of the two indexes as the initial feature vector set; obtain the energy entropy feature vector set, approximate entropy feature vector set, initial feature The vector set uses the distance separability criterion method to obtain the intra-class discrete matrix and the inter-class discrete matrix; calculate the weight of the energy entropy index and the weight of the approximate entropy index; weight each feature vector set to obtain a new feature vector set; the feature vector The random forest classifier is trained together to obtain the fault recognition model. The invention improves the accuracy and reliability of the detection result.

Description

technical field [0001] The invention relates to a detection method for blockage faults of drainage pipes, which belongs to the field of detection of pipe faults. Background technique [0002] The level of urbanization in my country is constantly improving. With the development of urban economy, the length of drainage 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 drainage 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 detection method for drainage pipe blockage is very necessary for pipeline fault detection. Contents of the invention [0003] In order to solve the problem of detection of drainage pipe blockage faults, the present in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17D5/06G06K9/00
CPCF17D5/06G06F2218/12
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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