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A detection device and detection method for sewer pipeline leakage faults

A technology of pipeline leakage and detection device, which is applied in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as fault detection of sewer pipeline leakage, and achieve the effect of convenient detection process, good reception, and improved detection efficiency.

Active Publication Date: 2019-05-14
KUNMING UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0003] In order to solve the problem of sewer pipe leakage fault detection, the present invention provides a sewer pipe leakage fault detection device and detection method

Method used

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  • A detection device and detection method for sewer pipeline leakage faults
  • A detection device and detection method for sewer pipeline leakage faults
  • A detection device and detection method for sewer pipeline leakage faults

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Embodiment 1

[0026] Embodiment 1: A detection method for sewer pipeline leakage faults, including three parts: signal acquisition and preprocessing, fault feature extraction, and fault classification and recognition.

[0027] Signal acquisition and preprocessing: In this embodiment, first, a section of 30-meter-long normal pipeline is detected by the device of the present invention to obtain the acoustic signal G of the side pipe wall and the lower pipe wall of the normal pipe. 11 (t), G 12 (t), (the signal that can be input into MATLAB is a dual-channel signal, channel 1 is the signal of the side wall, and channel 2 is the signal of the lower wall) and its time domain waveform is as follows image 3 shown. First to G 11 (t), G 12 (t) The signal is decomposed by three layers of db5 wavelet base wavelet packet, and its G 11 (t), G 12 The 8 wavelet packet coefficients of (t), use these 8 wavelet packet coefficients to reconstruct the signal components in a single layer, and obtain 8 wav...

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Abstract

The invention discloses a device and method for detecting a sewer line leakage fault. The device comprises two telescopic rods, a sound card, an amplifier, a loudspeaker, a screen, an acoustic emission sensor group, a filter and a computer. The method comprises the steps that firstly, signal acquisition and preprocessing are conducted, and a feature packet component set is built; secondly, feather extraction is conducted; and thirdly, fault classification is conducted on line unknown segments. According to the whole device and method for detecting the sewer line leakage fault based on practical situations of sewer line leakage fault detection, detection signals of a sewer line can be extracted for fault identification under the condition that engineering personnel do not enter the sewer line, the detection flow is facilitated, and the detection efficiency is improved.

Description

technical field [0001] The invention relates to a detection device and a detection method for sewer pipeline leakage faults, belonging to the field of pipeline fault detection. Background technique [0002] A sewer leak is a failure that affects the normal operation of the plumbing. In cities, sewer pipes are placed underground and the lines are tortuous and complicated, which makes it difficult to detect pipe leaks. There are many methods for leak detection of pipelines. At present, the commonly used fault research methods of pipelines include infrared photography, mass balance method, negative pressure wave method, tracer gas tracing method and so on. However, because some fault detection methods can only be used in specific situations, and the detection methods are relatively complicated, they are not suitable for the detection of sewer pipes. Contents of the invention [0003] In order to solve the problem of detecting leakage faults of sewer pipes, the present inve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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