Monitoring data noise reduction method based on urban pipeline leakage

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...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a monitoring data denoising method and system based on urban pipeline leakage, which can effectively solve the problem of poor denoising effect when the noise energy changes greatly.

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