Leak detection method and leak detection device based on combination of wavelet and emd reconstruction
A leak detection, combined technology used in the testing of measuring devices, machinery/structural components, by detecting the presence of fluid at the leak point, etc., to solve problems such as weak signals
Active Publication Date: 2019-07-09
NANJING UNIV OF POSTS & TELECOMM
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
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
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0059] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
[0060] 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, and the sensor is sequentially 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, connected to the wireless communication module through the serial port 1, and connected to the wireless communication module through The serial port 2 is connected with the global posi...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More 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 present invention relates to a leak detection method and 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-directional neighborhood mode and correlation delay estimation based on EMD reconstruction The disclosed leak detection device and method belong to the field of pipeline leak detection and positioning. Background technique [0002] Pipeline transportation is the most economical transportation option when transporting large quantities of oil, gas, chemicals and water. It has the advantages of large transportation volume, uninterrupted transmission, and not affected by other factors such as climate. Therefore, pipeline transportation has become the fifth major mode of transportation after road transportation, railway transportation, water transportation and air transportation. [0003] According to the survey, in 2014, the total...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F17D5/06G01M3/24
CPCF17D5/06G01M3/243
Inventor 董恒谭建勇刘思琴
Owner NANJING UNIV OF POSTS & TELECOMM