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A Mirror Quality Analysis Method Based on 2D Structured Light

A technology of quality analysis and structured light, which is applied in the direction of material analysis, material analysis, and measuring devices through optical means to achieve the effect of improving efficiency

Active Publication Date: 2022-05-03
ZHEJIANG UNIV OF TECH
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  • A Mirror Quality Analysis Method Based on 2D Structured Light
  • A Mirror Quality Analysis Method Based on 2D Structured Light
  • A Mirror Quality Analysis Method Based on 2D Structured Light

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[0042] The present invention will be further described below in conjunction with the accompanying drawings.

[0043] refer to figure 1 , a mirror quality analysis method based on 2D structured light, comprising the following steps:

[0044] 1) installation equipment, measuring equipment of the present invention is a color checkerboard flat plate and a digital camera, and digital camera is placed on the position of about 6m apart from mirror surface, and target target is apart from mirror surface about 1m; Mirror surface and target target are certain angles, guarantee The camera can take a checkerboard image of the target through the reflection of the mirror. Adjust the camera parameters, including optical focal length, aperture, ISO, white balance and exposure time, etc., to ensure the clarity of the image captured by the camera. Set the camera to remote control mode to avoid the risk of manual shooting destroying the coordinate relationship between measurement components; ...

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Abstract

A mirror quality analysis method based on 2D structured light, comprising the following steps: 1) installing equipment; 2) constructing an initial mirror model; 3) analyzing the camera imaging process using a pinhole model; 4) determining pixel points P, reflection points M and Correspondence of the target point T; 5) Color checkerboard encoding; 6) Color checkerboard segmentation and decoding; 7) Mirror equation description optimization; 8) Fitting a new mirror model according to the normal vector, the fitting method is the least squares method; 9) According to the new mirror model, calculate whether the model converges; 10) According to the obtained converged mirror model, calculate the normal vector at the mirror reference point; 11) compare whether the normal vector fitted at the reference point is the same as the designed normal vector; 12) Calculate the focal length of the fitted parabolic mirror in the X and Y directions, calculate the standard deviation of the deviation between the normal vector of the mirror surface and the ideal value, and characterize the flatness of the mirror surface. The invention can obtain more accurate measurement results and higher measurement efficiency.

Description

technical field [0001] The invention belongs to the field of mirror surface quality analysis and detection, and relates to a technique for analyzing the mirror surface of a concentrator in concentrating thermal power generation, and a method for analyzing the mirror surface quality based on 2D structured light. Background technique [0002] At present, the rapid consumption of fossil energy and the serious pollution of the environment have become the focus of the world's common attention, and the development of new energy has become the core of research in various countries. Among them, solar energy has attracted more and more attention and research because of its sustainability and cleanliness. The main way to use solar energy is to convert light energy into electrical energy. The existing technologies mainly include photovoltaic power generation and concentrated solar thermal power generation. In concentrated solar thermal power generation, the quality of the heat source d...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/55G01N21/17
CPCG01N21/55G01N21/17
Inventor 娄嘉瑞许金山李松
Owner ZHEJIANG UNIV OF TECH
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