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A method and system for detecting defects on the inner surface of a gas transmission pipeline

A transmission pipeline and defect detection technology, which is applied to pipeline systems, optical testing flaws/defects, measuring devices, etc. The effect of improving efficiency and accuracy

Active Publication Date: 2021-08-17
涿州滨海燃气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide a method and system for detecting defects on the inner surface of a gas delivery pipeline. Problems of low efficiency, low accuracy and inability to judge the degree of harm of gas pipeline defects

Method used

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  • A method and system for detecting defects on the inner surface of a gas transmission pipeline
  • A method and system for detecting defects on the inner surface of a gas transmission pipeline
  • A method and system for detecting defects on the inner surface of a gas transmission pipeline

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Embodiment 1

[0054] Such as figure 1 As shown, the application provides a method for detecting defects on the inner surface of a gas delivery pipeline, the method comprising:

[0055] Step S1, with the assistance of the lighting system, image acquisition is performed on the inner surface of the gas delivery pipeline to obtain a planar strip image.

[0056]The image acquisition method is as follows: move forward one step along the length direction of the gas delivery pipeline, collect a circular image in the circumferential direction of the inner surface of the gas delivery pipeline; expand the circular image into a plane image; expand multiple circular images without seam stitching into a flat strip image.

[0057] The appropriate step size is set in advance to ensure the graphic collection of the inner surface of the gas pipeline without omission.

[0058] According to the actual situation, select an appropriate number of ring images to form a plane strip image.

[0059] Preferably, th...

Embodiment 2

[0105] Such as image 3 As shown, the present application provides a gas pipeline inner surface defect detection system 100, including:

[0106] The motion controller 10 is connected with the image acquisition device, and is used to drive the image acquisition device to move in the gas delivery pipeline.

[0107] The image acquisition device 20 is used to acquire images of the inner surface of the gas delivery pipeline with the assistance of the illumination system to obtain a planar strip image.

[0108] The motion path of the motion controller 10 is preset, and the motion controller 10 drives the image acquisition device 20 to move according to the preset motion path, and the image acquisition device 20 collects images of the inner surface of the gas delivery pipeline.

[0109] The motion path starts from one end of the gas delivery pipeline, the motion controller 10 is located at the bottom of the inner surface of the gas delivery pipeline, and the image acquisition device...

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PUM

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Abstract

The present application provides a method and system for detecting defects on the inner surface of a gas delivery pipeline. The method includes: collecting images of the inner surface of the gas delivery pipeline with the assistance of an illumination system to obtain a planar strip image; detecting defects in the planar strip image According to the defect image, the damage degree value of the internal surface defect of the gas transmission pipeline is calculated; according to the damage degree value of the internal surface defect of the gas transmission pipeline, it is judged that the gas transmission pipeline needs to be repaired or replaced; if the judgment result is that the gas transmission pipeline If it needs to be repaired, implement the defect repair method, and if it is judged that the gas delivery pipeline needs to be replaced, then the gas delivery pipeline should be replaced. The application improves the detection efficiency and detection accuracy of the internal surface defects of the gas transmission pipeline, and evaluates the harmful degree of the surface defects.

Description

technical field [0001] The present application relates to the technical field of defect detection, in particular to a method and system for detecting defects on the inner surface of a gas delivery pipeline. Background technique [0002] During the long-term use of the gas pipeline, it is subject to the joint action of internal and external media, and mechanical cracks and corrosion points (pit or hole) will appear on the pipe wall, which will damage the surface integrity of the pipeline body, which may cause unsafe hidden dangers caused by pipeline leakage and cause environmental pollution. , so that the pipeline function gradually "weakens" and enters the accident-prone period. [0003] The internal inspection of pipelines is very difficult. It is a huge project to use traditional methods for internal inspection of underground pipelines. Traditional inspection methods include magnetic particle inspection methods, eddy current inspection methods, etc. Traditional inspection ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/88G01N21/954G06T7/00G06T3/40G06N3/04F17D5/06
CPCG01N21/8806G01N21/8851G01N21/954G06T7/001G06T3/4038G06T7/00G06T3/40G06N3/04G01N2021/8861G01N2021/8858G01N2021/8887G01N2021/9548G06N3/045
Inventor 郑万林李慧
Owner 涿州滨海燃气有限公司