Monitoring data noise reduction method based on urban pipeline leakage

A technology for monitoring data and urban pipelines, applied to instruments, character and pattern recognition, computer components, etc., can solve problems such as poor denoising effect, achieve convenient and fast calculation, large signal distortion rate, and prevent information loss.

Pending Publication Date: 2022-04-29
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a monitoring data denoising method and system based on urban p

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  • Monitoring data noise reduction method based on urban pipeline leakage
  • Monitoring data noise reduction method based on urban pipeline leakage
  • Monitoring data noise reduction method based on urban pipeline leakage

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Embodiment Construction

[0060] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0061] Such as figure 2 As shown, the experimental device for simulating urban pipelines is laid out, and the experimental device includes buried non-metallic pipelines, pressure sensors, pressure gauges, vortex flowmeters, computers, air compressors and infrasonic wave collectors; buried non-metallic pipelines include A U-shaped main pipeline and two branch pipelines; the buried non-metallic pipeline is provided with leaks, and the diameters of the leaks are 1mm, 2mm, 3mm, and 8mm respectively.

[0062] Such as Figure 1-7 As shown, a monitoring data noise reduction method based on urban pipeline leakage, including:

[0063] Collect leak raw data of infrasonic waves from leaking pipelines X...

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Abstract

The invention discloses a monitoring data noise reduction method based on urban pipeline leakage in the field of data noise reduction. The monitoring data noise reduction method comprises the steps of collecting leakage original data Xi (t) of infrasonic waves of a leakage pipeline; establishing an amplitude spectrogram and an effective frequency window of the frequency domain signal XF, i (s); dividing the frequency domain signal XF, i (s) into M sections of unit signals xm, removing the unit signals xm influenced by noise by using a differential energy model, and recombining to form a stable signal xc, i; carrying out Prony decomposition on the stable signal xc, i, and calculating an extreme value and a residue; after the extreme value and the residue are screened according to the effective frequency window, the real signal is reconstructed, and a complete signal x (t) after denoising is completed is obtained; according to the method, structural inherent information in leakage signals can be prevented from being lost, meanwhile, the condition number of a matrix is reduced, calculation is convenient and rapid, and stability is better.

Description

technical field [0001] The invention belongs to the field of data noise reduction, in particular to a monitoring data noise reduction method based on urban pipeline leakage. Background technique [0002] With the rapid advancement of my country's urbanization process, pipeline transportation has become increasingly important in urban production and life. However, due to factors such as self-aging, irregular construction process and external environment, pipeline leakage accidents occur from time to time, which not only cause huge personal casualties and property losses, but also pose a major threat to urban public safety and ecological environment. If the leakage can be found in time and the location of the leakage source can be accurately located, it will be of great significance to ensure the safety of the city and the lives of residents. [0003] Infrasonic waves are used in the detection of urban pipeline leaks due to their unique advantages of long propagation distance...

Claims

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Application Information

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IPC IPC(8): G06K9/00
CPCG06F2218/04
Inventor 李敏郝永梅蒋军成刑志祥许宁杨健吴凡郑凯
Owner CHANGZHOU UNIV
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