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Method for optimizing excitation modes in transient flow-based pipeline tiny leakage detection

A technology of leak detection and optimization method, which is applied in pipeline system, design optimization/simulation, gas/liquid distribution and storage, etc. It can solve problems such as the influence of measurement results, and achieve the effects of small influence, reduced shutdown time, and accurate measurement results

Inactive Publication Date: 2018-08-28
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical engineering applications, different input signals and different excitation positions may affect the measurement results

Method used

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  • Method for optimizing excitation modes in transient flow-based pipeline tiny leakage detection
  • Method for optimizing excitation modes in transient flow-based pipeline tiny leakage detection
  • Method for optimizing excitation modes in transient flow-based pipeline tiny leakage detection

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Embodiment 1

[0044] The embodiment of the present invention provides a method for optimizing the excitation mode in the detection of small leaks in transient flow of pipelines, see figure 1 , the method includes the following steps:

[0045] 101: Establish a pipeline leakage system model through Flowmaster software and select various component parameters;

[0046] 102: Explore the influence of the position of the excitation point on the positioning accuracy in the leakage detection of the harmonic attenuation method;

[0047] 103: Explore the influence of pulse signal valve action time, pulse signal amplitude, and excitation signal waveform on positioning accuracy in harmonic decay method leak detection.

[0048] Further, the establishment of the pipeline leakage system model by the Flowmaster software in step 101 is specifically:

[0049] It is composed of the left water tank, the right water tank, the first pipeline, the second pipeline, the third pipeline, the leakage hole, the extern...

Embodiment 2

[0067] Combined with the specific calculation formula, Figure 2-Figure 5 1. Examples further introduce the scheme in Example 1, see the following description for details:

[0068] 201: Establish a pipeline leakage system model through Flowmaster software and select various component parameters to explore the influence of the location of the excitation point on the positioning accuracy in the leakage detection of the harmonic attenuation method;

[0069] The detailed operation of this step is:

[0070] 1) Establish a pipeline leakage system model, such as figure 2 shown.

[0071] The pipeline leakage system model is mainly composed of water tanks (left tank 1 and right tank 2), pipelines (first pipeline 3, second pipeline 4 and third pipeline 5), leakage hole 6, external environment, valve 7, and valve control Device 8 consists of these parts.

[0072] The total length of the first pipeline 3, the second pipeline 4 and the third pipeline 5 is 1000m, the pressure wave velo...

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Abstract

The invention discloses a method for optimizing excitation modes in transient flow-based pipeline tiny leakage detection. The optimizing method comprises the following steps of: building a pipeline leakage system model through Flowmaster software and selecting various component parameters; exploring the influence of excitation point positions on positioning accuracy in harmonic attenuation method-based leak detection; and exploring the influence of valve actuation time of pulse signals, amplitude of the pulse signals and waveform of excitation signals on the positioning accuracy in the harmonic attenuation method-based leak detection. According to the method disclosed by the invention, factors such as the positions of excitation points, the valve closing time, the amplitude of the excitation signals, the waveform of the excitation signals and the like are changed in the model to find an excitation mode which is least in the influence on the normal operation of a pipeline and most accurate in the measurement result.

Description

technical field [0001] The invention relates to the field of micro-leakage detection of transient flow pipelines, in particular to a method for optimizing an excitation mode in the detection of micro-leakages of pipelines. Background technique [0002] With the development of the national economy, oil and natural gas occupy an increasingly important position as the most important energy material in contemporary society. my country's oil and natural gas resources are mainly concentrated in the central and western regions, and long-distance oil pipelines are needed to complete the allocation and transportation of resources. Pipeline transportation has the advantages of large transportation volume and low cost. However, in recent years, the pipeline has been in disrepair for a long time, and there are leaks in many places. The behavior of criminals stealing oil during pipeline transportation has become more and more serious, which has caused great losses to the national economy...

Claims

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Application Information

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IPC IPC(8): G06F17/50F17D5/06
CPCF17D5/06G06F30/20G06F2113/14G06F2119/06
Inventor 白志亮陈世利俞逸飞曾周末
Owner TIANJIN UNIV
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