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Method and device for detecting corrosion defects on pipeline surface based on microwave nondestructive testing

A defect detection and non-destructive testing technology, applied in the direction of using microwave flaw detection, etc.

Inactive Publication Date: 2020-10-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
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  • Abstract
  • Description
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Problems solved by technology

[0010] The main purpose of the present invention is to provide a method and device for detecting corrosion defects on pipeline surface based on microwave non-destructive testing, aiming to solve all or part of the above technical problems existing in existing methods

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  • Method and device for detecting corrosion defects on pipeline surface based on microwave nondestructive testing
  • Method and device for detecting corrosion defects on pipeline surface based on microwave nondestructive testing
  • Method and device for detecting corrosion defects on pipeline surface based on microwave nondestructive testing

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Embodiment Construction

[0048] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0049] Such as figure 1 Shown is a schematic flow diagram of the pipeline surface corrosion defect detection method based on microwave nondestructive testing of the present invention; a pipeline surface corrosion defect detection method based on microwave nondestructive testing includes the following steps:

[0050] S1. Collect the microwave reference signal and microwave detection signal after being reflected on the surface of the pipeline to be tested;

[0051] In this embodiment, the present invention first uses microwave equipment to generate an excitation signal corresponding to the microwave ...

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Abstract

The invention discloses a method and device for detecting corrosion defects on the surface of pipelines based on microwave non-destructive testing. The method includes collecting microwave signals reflected from the surface of the pipeline to be tested, performing imaging processing on the phase value of the reflection coefficient by using microwave imaging technology, and performing imaging processing on the imaging results. Edge detection processing, to obtain defect position and width information, build a defect detection model, and calculate defect depth information. The invention uses the phase values ​​of the microwave reflection coefficients at different detection positions as imaging pixels, and at the same time recognizes the boundary to obtain defect position and width information, and at the same time, according to the relationship model between the reflection coefficient phase difference and the defect size, the defect depth is reversely solved Quantitative information to realize the quantitative detection of the position, width and depth of defects on the pipeline.

Description

Technical field [0001] The invention belongs to the technical field of defect detection, and specifically relates to a method and device for detecting corrosion defects on the surface of a pipeline based on microwave nondestructive testing. Background technique [0002] Conventional pipeline non-destructive testing methods mainly include eddy current testing, magnetic particle testing, ultrasonic testing, and radiographic testing. Compared with other non-destructive testing methods, the microwave non-destructive testing technology using microwave as the information carrier has good anti-interference ability. It can monitor defects quickly, continuously and in real time. At the same time, it can provide accurate data. Defects are reconstructed to make the size and scope of the defect area more intuitive and accurate. Because microwave has good reflection ability on metal specimens and good penetration ability on non-metal specimens, this technology can be applied to the detection...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N22/02
CPCG01N22/02
Inventor 于亚婷王聪秦鸿王振伟程西檬
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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