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A leakage location method combining hydrophone and wavelet denoising

A technology of wavelet denoising and positioning method, applied in the direction of instrument, character and pattern recognition, pattern recognition in signals, etc., can solve the problems of intermittent detection, affecting the normal operation of detection work, lack of continuity in detection, etc., to improve the utilization rate , improve the accuracy and scientificity, improve the effect of delay accuracy

Inactive Publication Date: 2019-02-15
YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this type of method is that the detection lacks continuity and can only be detected intermittently, and blockage or other accidents will seriously affect the normal operation of the detection work

Method used

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  • A leakage location method combining hydrophone and wavelet denoising
  • A leakage location method combining hydrophone and wavelet denoising
  • A leakage location method combining hydrophone and wavelet denoising

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Such as figure 1 As shown, this embodiment provides a leak location method that combines hydrophones and wavelet denoising, including the following steps:

[0065] Step S101, the operator installs the hydrophone at the head and tail of the water pipeline, and uses the hydrophone to acquire the sound wave information generated during the mine water transportation process to obtain an unprocessed time series original sound wave information source;

[0066] Step S102, establishing a wavelet coefficient noise reduction processing model, and performing denoising filtering on the collected original non-stationary signal source;

[0067] The wavelet analysis method is characterized by high frequency resolution and low time resolution in the low frequency part, and high time resolution and low frequency resolution in the high frequency part, which is very suitable for detecting Transient anomalies entrapped in normal signals and demonstrate their components. Wavelet denoising...

Embodiment 2

[0107] This embodiment provides a specific leak location test, the specific process is:

[0108] Step S201, prepare two BA-FH3200 fiber optic hydrophones and their supporting equipment, hoses, booster pumps, etc., wherein the length of the hose is 400m, the diameter is DN25mm, and the wall thickness is 2mm.

[0109] Step S202, connect the fiber optic hydrophone to the data acquisition device, and perform delay calibration, calibration, demodulation, etc. to ensure the normal operation of the device.

[0110] Step S203, connect the upstream of the water delivery pipeline to the water pump, provide water source by a water tank, and use a booster pump to pressurize, the pressure is 0.5MPa; the downstream of the water delivery pipeline is connected to the collection device (for collecting test water, reducing the waste of water resources ), and form a submerged outflow. Arrange a leak point L on the water pipeline 1 , leakage area 1cm 2 .

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Abstract

The invention belongs to the technical field of water delivery pipeline leakage positioning, In particular, the invention relates to a leakage locating method fusing hydrophone and wavelet denoising,which comprises the following steps: installing a hydrophone at the head and tail ends of a water conveying pipeline respectively, acquiring the acoustic wave information generated in the course of mine water conveying by the hydrophone, and obtaining the original acoustic wave information source of the unprocessed time series; establishing The denoising model of wavelet coefficients to denoise and filter the original non-stationary signal source. Establishing The time delay value model to determine the time delay value of the signal after denoising. Establishing The location model, and locating the leakage point by using the time delay value obtained above. The invention improves the accuracy and scientificity of leakage positioning, and improves the utilization rate of mine water resources.

Description

technical field [0001] The invention belongs to the technical field of leakage location of water delivery pipelines, in particular to a leakage location method combining hydrophones and wavelet denoising. Background technique [0002] When the mine water is transported, when the water pipeline leaks, it will break the pressure balance in the water pipeline, and the water in the pipeline will be sprayed from the leakage point under the pressure, and the sprayed water will be in contact with the leakage point and The soil around the pipeline collides, resulting in vibrations of different forms and frequencies, and the sound wave signal will propagate upstream and downstream along the pipeline. Among them, the high-frequency signal will decay rapidly, while the low-frequency signal can travel a long distance, and the sound sources generated are generally the leakage noise at the leakage port, the impact sound of high-pressure water head, and the friction sound of the medium. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06F2218/06G06F2218/22
Inventor 张楠李舒郭欣伟江红张攀殷会娟吴凯李凌琪韩金旭孙维营
Owner YELLOW RIVER INST OF HYDRAULIC RES YELLOW RIVER CONSERVANCY COMMISSION