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Defect area calculation method and system for pipeline detection

A technology for pipeline detection and defect area, which is applied in the direction of optical testing of flaws/defects, measuring devices, and optical devices. It can solve the problems of pipe center deviation, pipeline data distortion, and quantization errors, etc., and achieve simple calculation principles and calculation The results are precise

Active Publication Date: 2021-04-02
WUHAN EASY SIGHT TECH
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Problems solved by technology

[0004] However, in the existing technology, defect assessment is performed based on video or image data. This method mostly relies on personal experience for the amount of pipeline defects, which may easily lead to a large deviation between the actual quantified data and the actual defect data. In addition, the two-dimensional laser radar point cloud data is used to During the pipeline 3D data reconstruction, due to the fact that the robot will stagnate when it encounters obstacles and shake itself, it is easy to cause serious distortion of the pipeline data; there are multiple repeated frame data at the same position; the tube core is shifted up and down, etc. problems, resulting in errors in the quantification of pipeline structural defects

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  • Defect area calculation method and system for pipeline detection
  • Defect area calculation method and system for pipeline detection
  • Defect area calculation method and system for pipeline detection

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the embodiments, so that those skilled in the art can implement it with reference to the description.

[0035] It should be noted that, in the description of the present invention, the terms "horizontal", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, or operate in a particular orientation, and thus should not be construed as limiting the invention.

[0036] Such as Figure 1-Figure 2 As shown, the embodiments of the presen...

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Abstract

The invention discloses a defect area calculation method and system for pipeline detection. The method comprises the following steps: obtaining the image information of a part, with a structural defect, in a pipeline through a camera, and obtaining a horizontal field angle omega and a vertical field angle beta of the camera and the distance S between the camera and the position, with the structural defects, in the pipeline during photographing; and according to the horizontal view field angle omega, the vertical view field angle beta, the distance S between the camera and the position where the structural defect occurs in the pipeline, and the ratio of the resolution corresponding to the defect position in the image information to the resolution of the image information, calculating to obtain the actual area of the defect position of the pipeline in the image information. According to the defect area calculation method and system for pipeline detection, the calculation principle is simple and convenient, and the calculation result is accurate.

Description

technical field [0001] The invention relates to the field of pipeline detection. More specifically, the present invention relates to a defect area calculation method and system for pipeline detection. Background technique [0002] At present, the inspection of the pipeline network mainly consists of inspection robots crawling on the bottom of the pipeline, monitoring the pipeline by obtaining video information, discovering functional defects of the pipeline, and performing pipeline maintenance; evaluating structural defects for pipeline repair. [0003] In the existing technology, the evaluation of structural defects in pipelines often takes video and screenshots of the damaged locations in the pipelines based on the camera mounted on the robot to obtain structural defect data in the pipelines, or through two-dimensional laser radar Scan the pipeline cross-section during the pipeline robot's travel, and reconstruct the pipeline's three-dimensional data according to the rada...

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Application Information

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IPC IPC(8): G01B11/28G01N21/88
CPCG01B11/285G01N21/8851
Inventor 刘志国彭庚翟樨祚
Owner WUHAN EASY SIGHT TECH
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