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Fluid leakage online supervision and locating system and method

A fluid leakage and positioning system technology, applied in the pipeline system, gas/liquid distribution and storage, mechanical equipment, etc., can solve problems such as difficult detection, large fluctuations, false positives or missed positives, etc., to achieve easy identification and improve The effect of the signal-to-noise ratio

Inactive Publication Date: 2017-06-09
JILIN PROVINCE BAIRUISHENG SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the infrasonic signal is affected by temperature, pressure, flow rate and density, and fluctuates greatly. Once the working conditions change, the pressure and flow rate in the pipeline will change accordingly, and the noise and leakage characteristics in the pipeline will change accordingly. During data collection, data analysis, parameter modification, and leakage characteristic analysis, there will be false positives or missed negatives due to parameter mismatch and unidentifiable features.
The transient model method (Meng Lingya, Journal of Beijing Jiaotong University, 2008, Volume 32, Issue 3, Pages 73-77) mainly predicts the theoretical pressure at the detection point of the pipeline through numerical simulation and compares it with the actual measured pressure , when the difference between the two reaches or exceeds a certain threshold, it is considered that the pipeline has leaked, and then the leak point is located by the positioning formula. method, this method is difficult to detect when a small leak occurs in the pipeline, even if the detected positioning error is large

Method used

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  • Fluid leakage online supervision and locating system and method
  • Fluid leakage online supervision and locating system and method
  • Fluid leakage online supervision and locating system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] When the system is running normally, the digitizer 7 collects the pressure data p in the pipeline through the pressure transmitter 2, collects the flow data Q of the fluid in the pipeline through the flowmeter 5, and collects the infrasonic data in the pipeline through the infrasonic wave sensor 1, and then the collected Pressure data p, flow data Q, and infrasound wave data are added to the Global Positioning System (GPS) time tag to eliminate the impact of network link delay on positioning, and then transmitted to the host through Ethernet or 3G / 4G using TCP / IP protocol. After receiving the data, the station system 8 and the master station system 8 calculate the L noise , through the infrasonic sensor gain adjustment formula, the infrasonic sensor gain Z=5×L noise , and transmit the gain Z to the infrasonic sensor through the digitizer, and the infrasonic sensor adjusts the gain according to the Z value.

[0026] When the sonic characteristic level L noise L , the s...

Embodiment 2

[0028] When the system is running normally, the digitizer 7 collects the pressure data p in the pipeline through the pressure transmitter 2, collects the flow data Q of the fluid in the pipeline through the flowmeter 5, and collects the infrasonic data in the pipeline through the infrasonic wave sensor 1, and then the collected Pressure data p, flow data Q, and infrasound wave data are added to the Global Positioning System (GPS) time tag to eliminate the impact of network link delay on positioning, and then transmitted to the host through Ethernet or 3G / 4G using TCP / IP protocol. After receiving the data, the station system 8 and the master station system 8 calculate the L noise , through the infrasonic sensor gain adjustment formula, the infrasonic sensor gain Z=5×L noise , and transmit the gain Z to the infrasonic sensor through the digitizer, and the infrasonic sensor adjusts the gain according to the Z value.

[0029] When L L ≤ L noise ≤ L H ,The system selects both t...

Embodiment 3

[0031] When the system is running normally, the digitizer 7 collects the pressure data p in the pipeline through the pressure transmitter 2, collects the flow data Q of the fluid in the pipeline through the flowmeter 5, and collects the infrasonic data in the pipeline through the infrasonic wave sensor 1, and then the collected Pressure data p, flow data Q, and infrasound wave data are added to the Global Positioning System (GPS) time tag to eliminate the impact of network link delay on positioning, and then transmitted to the host through Ethernet or 3G / 4G using TCP / IP protocol. After receiving the data, the station system 8 and the master station system 8 calculate the L noise , through the infrasonic sensor gain adjustment formula, the infrasonic sensor gain Z=5×L noise , and transmit the gain Z to the infrasonic sensor through the digitizer, and the infrasonic sensor adjusts the gain according to the Z value.

[0032] When the sonic characteristic level L noise >L H , t...

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Abstract

The invention discloses a fully automatic in-pipe fluid leakage online supervision and locating system and method. The system comprises a main station system and two or more than two substation systems. Each substation system comprises an infrasonic wave sensor, a pressure transducer, a flow meter, a valve, an external power supply and a digitizer. The in-pipe sound wave levels are assessed to automatically select the infrasonic wave method and (or) the transient model method to conduct leakage alarm and locate leakage points. Compared with the prior art of supervision and locating system, the fluid leakage online supervision and locating system has a higher locating precision, higher accuracy and a higher work condition adaptability.

Description

technical field [0001] The invention discloses an on-line fluid leakage monitoring and positioning system and method in a pipeline, and belongs to the technical field of fluid delivery pressure pipeline leakage monitoring and positioning. Background technique [0002] The core of pipeline operation management is "safety and economy". In recent years, due to the frequent occurrence of catastrophic accidents caused by oil and gas pipeline leakage, the safe operation and maintenance of pipelines have been threatened and challenged. Therefore, it is necessary to use advanced scientific means to establish a pipeline safety pre-alarm system, monitor fluid leakage accidents in pipelines in real time through effective technical means, accurately issue leakage alarms and quickly locate them, so that production units can start corresponding emergency plans and realize Process monitoring of leakage incidents. To achieve the above functions, it is first necessary to continuously monit...

Claims

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Application Information

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IPC IPC(8): F17D5/06
CPCF17D5/06
Inventor 杨凯
Owner JILIN PROVINCE BAIRUISHENG SCI & TECH DEV
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