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Leakage detection method and the leakage detection device based on combination of wavelet and EMD reconstruction

A leak detection device and leak detection technology, which is applied in the testing of measuring devices, machines/structural components, and detects the presence of fluid at leak points, etc., can solve problems such as weak signals

Active Publication Date: 2017-12-12
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0006] Aiming at the problem that the signal when the water supply pipeline leaks is relatively weak and mixed with a lot of noise, the present invention proposes a correlation analysis and positioning technology for the continuous leakage of urban water supply pipeline acoustic signals, and develops a portable water supply pipeline leakage point detection device to improve the water supply pipeline detection technology level. In particular, a pipeline leak location detection device and method based on the combination of wavelet general threshold denoising and EMD reconstruction based on multi-directional neighborhood mode is proposed

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  • Leakage detection method and the leakage detection device based on combination of wavelet and EMD reconstruction
  • Leakage detection method and the leakage detection device based on combination of wavelet and EMD reconstruction
  • Leakage detection method and the leakage detection device based on combination of wavelet and EMD reconstruction

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Embodiment Construction

[0058] The technical scheme of the present invention will be further described in detail below in conjunction with the accompanying drawings:

[0059] figure 1 It is a schematic structural diagram of a pipeline leakage detection device according to an embodiment of the present invention. The pipeline leakage detection device includes a piezoelectric acceleration sensor for detecting pipeline leakage signals. The sensor is connected with an amplifier, a band pass filter, and an analog-to-digital conversion module (ADC ) Connection, the analog-to-digital conversion module transmits the generated digital signal to the STM32 microcontroller; the STM32 microcontroller is connected to the storage disk through the address bus and data bus, connected to the power supply module through the I / O line, and connected to the wireless communication module through the serial port 1. The serial port 2 is connected with the global positioning system clock synchronization control module. There is ...

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Abstract

The invention discloses a leakage detection method and a leakage detection device based on a combination of a wavelet and EMD reconstruction. The pipeline leakage detection device takes an STM32 single-chip microcomputer as a core, and mainly comprises a sensor, an amplifier, a filter, an A / D conversion module and a transmission module. After the pipeline leakage detection device collects data, the data are transmitted to a computer through a wireless communication module; the computer uses Matlab software to carry out denoising processing on the collected data by combining the wavelet universal threshold denoising and the EMD reconstruction of a multi-azimuth neighborhood mode, positioning is carried out through correlation analysis, so that the position of a pipeline leakage point is obtained. According to the leakage detection method and the leakage detection device, noise can be effectively removed, useful signals can be extracted, and therefore the accuracy of positioning the pipeline leakage point is remarkably improved.

Description

Technical field [0001] The invention relates to a leak detection method and a leak detection device based on the combination of wavelet and EMD reconstruction, in particular to a combination of wavelet general threshold denoising based on multi-azimuth neighborhood mode and correlation time delay estimation based on EMD reconstruction The leak detection device and method belong to the field of pipeline leak detection and positioning. Background technique [0002] When transporting large amounts of oil, natural gas, chemicals and water, pipeline transportation is the most economical transportation option. It has the advantages of large transportation volume, uninterrupted transmission, and freedom from weather and other factors. Therefore, pipeline transportation has become the fifth main mode of transportation after road transportation, railway transportation, water transportation, and air transportation. [0003] According to the survey, the total length of pipelines used for tr...

Claims

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Application Information

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IPC IPC(8): F17D5/06G01M3/24
CPCF17D5/06G01M3/243
Inventor 董恒谭建勇刘思琴
Owner NANJING UNIV OF POSTS & TELECOMM
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