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Device for positioning leak source of three-sensor multi-scale constrained pipe network

A multi-scale, sensor technology that can be used in positioning, by detecting the presence of fluid at the leak point, measuring devices, etc., to solve problems such as inaccurate location of leak points in the pipe network

Inactive Publication Date: 2011-09-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of inaccurate location of leaks in existing pipe networks, and provide a device for locating leaks in pipe networks with three sensors and multi-scale constraints

Method used

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  • Device for positioning leak source of three-sensor multi-scale constrained pipe network
  • Device for positioning leak source of three-sensor multi-scale constrained pipe network
  • Device for positioning leak source of three-sensor multi-scale constrained pipe network

Examples

Experimental program
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Effect test

specific Embodiment 1

[0064] to combine Figure 13 Describe this embodiment, three acceleration sensors 1, three preamplifiers 2, three bandpass filters 3, three postamplifiers 4, signal storage device 7, signal processing device 8 and result display device of this embodiment 6 are all carried out continuously in real time in a relatively short period of time. Due to the addition of wireless transmitting and receiving modules, the acceleration sensor 1 is connected to the preamplifier 2 through wireless communication, which greatly reduces the need for long-distance installation during long-distance measurement. The inconvenience and trouble of the data line.

specific Embodiment 2

[0065] to combine Figure 14 Describe this embodiment, three acceleration sensors 1, three preamplifiers 2, three bandpass filters 3, three postamplifiers 4, signal storage device 7, signal processing device 8 and result display device of this embodiment 6 are all carried out continuously in real time in a relatively short period of time. Although the present embodiment needs to pull the data line during the measurement, the acceleration sensor 1 is connected to the preamplifier 2 through the data line, but the investment of the wireless acquisition module is saved and the signal is relatively more reliable.

specific Embodiment 3

[0066] to combine Figure 15Describe this embodiment, this embodiment adopts the offline signal acquisition device processing method, the specific implementation method is: first all acquisition modules must be set on the portable computer, including the start time, sampling length, sampling frequency and magnification, etc. That is, when all the acquisition modules are placed at the point to be measured, start at the same time, collect signals of the same length according to the same acquisition frequency and magnification, and store them in each module. After collecting all the modules together, download them to the portable computer. Analyze and process the results. The offline acquisition module includes: acceleration sensor 1, preamplifier 2, bandpass filter 3, postamplifier 4, signal storage unit, control unit and power supply unit, etc. The portable computer is equipped with a signal processing device program, which can be used for any three The data obtained by each a...

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Abstract

The invention provides a device for positioning a leak source of a three-sensor multi-scale constrained pipe network, relates to a device for positioning a leak source of a pipe network, and solves the problem of inaccurate positioning of the leak source of the pipe network. The device comprises three acceleration sensors, three pre-positive amplifiers, three band-pass filters, three postpositive amplifiers, a high speed data collecting card, a result display device, an information storage device and a signal processing device, wherein the three acceleration sensors are arranged at three different measuring points of the pipe network to be measured; output ends of the three acceleration sensors are respectively connected with input ends of the pre-positive amplifiers; the output ends of the three pre-positive amplifiers are respectively connected with the input ends of the corresponding band-pass filters; the output ends of the three band-pass filters are respectively connected with the input ends of the corresponding postpositive amplifiers; the output ends of the three postpositive amplifiers are respectively connected with an input end of the high speed data collecting card; and the output end of the signal processing device is connected with the other input end of the signal storage device. The device is suitable for positioning the leak source of the pipe network.

Description

technical field [0001] The invention relates to a device for locating leakage points of pipeline networks. Background technique [0002] The standard configuration of the correlator is: a host, two radio transmitters, and two high-sensitivity acceleration sensors. The two sensors are placed on the exposed points of the pipeline, and the distance between the two sensors can be controlled at about 100 meters during the test. related to pipe diameter and material). When the pipeline leaks, water leakage sound waves will be generated at the leak and propagate far along the pipeline. When the water leakage sound waves are transmitted to different sensors, a time difference Td will be generated, as long as the actual length of the pipeline between the two sensors L and The propagation velocity V of the sound wave in the pipeline, and the position Lx of the leak point can be calculated according to the following formula: Lx=(L-V×Td) / 2. Although the appearance of the correlator see...

Claims

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Application Information

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IPC IPC(8): G01S5/22G01M3/24
Inventor 张建利郭卫星
Owner HARBIN INST OF TECH