Method for monitoring leakage and positioning pipeline through straining loop sensor array

A sensor array, pipeline leakage technology, applied in pipeline systems, mechanical equipment, gas/liquid distribution and storage, etc., can solve problems such as pipeline leakage monitoring and positioning, and achieve the effect of non-destructive pipeline structure, high sensitivity, and error reduction.

Inactive Publication Date: 2015-04-22
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for monitoring and locating pipeline leakage through a strain hoop sensor array, wh...

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  • Method for monitoring leakage and positioning pipeline through straining loop sensor array
  • Method for monitoring leakage and positioning pipeline through straining loop sensor array
  • Method for monitoring leakage and positioning pipeline through straining loop sensor array

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Embodiment Construction

[0025] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0026] A section of pipeline is virtualized in this specific implementation manner, and the specific implementation manner of the present invention is described in detail based on this pipeline.

[0027] Step 1: Install 5 strain hoop sensors at the design interval L on the outer wall of the pipeline to form a strain hoop sensor array, and number the strain hoop sensors as 1#, 2#, 3#, 4#, and 5# in order to monitor the ring of the outer wall of the pipeline in real time. Changes to strain.

[0028] Step 2: When the negative pressure wave is detected by the strain hoop sensor array, the pipeline leaks.

[0029] Step 3: Assume that 1#, 2#, 3#, 4#, 5# measured the time when the negative pressure wave appeared as t1, t2, t3, t4, t5 respectively, compare their order, if t1>t2> t3>t4

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Abstract

The invention provides a method for monitoring leakage and positioning a pipeline through a straining loop sensor array, and belongs to the technical field of monitoring of pipelines. The method is characterized by comprising the steps of monitoring leakage through a negative pressure wave time interval signal generated by the straining loop sensor array during measuring leakage; measuring time difference of a negative wave signal and a geometric distance equitation set of a straining loop sensor through the straining loop sensor array; removing negative pressure wave speed which is an unknown value; solving the position of a leakage point; reducing the positioning error by the method of averaging a plurality of leakage point positions. The method has the effects and benefits that the shortage that the negative pressure wave speed is utilized for calculating and positioning in the traditional negative pressure wave positioning method, which causes low leakage positioning precision is solved; the reliability is high, the pipeline structure is free of damage, and the leakage can be monitored on real time.

Description

technical field [0001] The invention belongs to the technical field of pipeline monitoring, and relates to a pipeline leakage monitoring and positioning method, in particular to a pipeline leakage monitoring and positioning method using a strain hoop sensor array. Background technique [0002] During the operation of oil and gas pipelines, due to their own damage and the destructive effects of some external forces, leakage accidents will inevitably occur. Once a leakage occurs, it will not only generate a huge waste of resources, but also cause pollution to the environment. Therefore, the pipeline The monitoring and location of leaks is particularly important. [0003] When a pipeline leaks, there is an immediate material loss in the leaking part, which causes the fluid density at the leak location to decrease and the pressure to drop. The fluid fills the leakage area, which in turn causes the density and pressure of the area adjacent to the leakage area to decrease. This p...

Claims

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Application Information

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IPC IPC(8): F17D5/02
Inventor 任亮姜涛贾子光李宏男
Owner DALIAN UNIV OF TECH
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