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Pipeline wall thickness detection method and device

A detection method and pipeline wall technology, applied in the field of pipeline wall thickness detection method and device, can solve the problems of low detection accuracy and achieve the effect of improving detection accuracy and reducing the degree of influence

Active Publication Date: 2020-05-08
PETROCHINA CO LTD
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Problems solved by technology

[0005] The embodiment of the present invention provides a pipe wall thickness detection method and device, which can solve the problem of low detection accuracy of pipe wall thickness detection through related technologies

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  • Pipeline wall thickness detection method and device
  • Pipeline wall thickness detection method and device
  • Pipeline wall thickness detection method and device

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Embodiment Construction

[0076] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0077] Embodiments of the present invention provide a method for detecting pipe wall thickness, such as figure 1 As shown, the method may include:

[0078] Step 101. Obtain variance contribution rates of multiple intrinsic mode functions of electromagnetic ultrasonic signals.

[0079] Step 102: Accumulate the variance contribution rate of each intrinsic mode function in descending order of the variance contribution rates of multiple intrinsic mode functions, and make the accumulated sum greater than or equal to at least one variance of the preset threshold for the first time The contribution rate is determined as the target variance contribution rate.

[0080] Step 103: Determine the intrinsic mode function corresponding to the targe...

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Abstract

The invention discloses a pipeline wall thickness detection method and device, and belongs to the technical field of nondestructive detection. The method comprises the following steps of: acquiring variance contribution rates of a plurality of intrinsic mode functions of an electromagnetic ultrasonic signal; sequentially accumulating the variance contribution rate of each intrinsic mode function according to the descending order of the variance contribution rates of the plurality of intrinsic mode functions, and determining at least one variance contribution rate of which the accumulated sum is greater than or equal to a preset threshold value for the first time as a target variance contribution rate; determining an intrinsic mode function corresponding to the target variance contributionrate as a target intrinsic mode function; constructing a target electromagnetic signal based on the at least one target intrinsic mode function; acquiring at least two first target peak points of an envelope of the target electromagnetic signal; and determining the wall thickness of the to-be-detected pipeline based on the at least two first target peak points. According to the invention, the detection precision for detecting the wall thickness of the pipeline is improved. The method is used for detecting pipeline defects.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a method and device for detecting the wall thickness of a pipeline. Background technique [0002] The pipeline is the main tool for transporting oil and natural gas. The pipeline will be aged, deformed or corroded when used for a long time, so that the wall thickness index of the pipeline cannot meet the safety requirements, resulting in pipeline accidents. Therefore, the wall thickness of the pipeline should be checked regularly. Inspection, to find defects and repair pipelines in time, is of great significance to ensure the safe use of pipelines. [0003] In the related art, the electromagnetic ultrasonic (Electromagnetic Acoustic Transducer, EMAT) detection technology is usually used to measure the propagation time of the electromagnetic ultrasonic wave in the pipeline, and then the wall thickness information of the pipeline is determined according to the propa...

Claims

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Application Information

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IPC IPC(8): G01B17/02G06K9/00
CPCG01B17/02G06F2218/10G06F2218/04
Inventor 李晓霜田贵云刘良果高斌张文艳黄海钟光彬杨建明彭科
Owner PETROCHINA CO LTD
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