A system and method for detecting the surface shape of tower-type secondary reflection mirrors based on multi-eye ranging

Abstract

The invention relates to a tower-type secondary reflection mirror surface detection system and method based on multi-view distance measurement, and the system comprises at least two image collection systems and a computer. The system comprises the steps: firstly enabling the image centers of the image collection systems to be aligned with a target point, and respectively obtaining the posture information (a pitching angle and a horizontal angle) of each image collection system; secondly carrying out the precise positioning of the target point on the images, and calculating a deflection angle through the deflection between the target point and the image centers in an image coordinate system; thirdly correcting the pitching angles and the horizontal angles; and finally obtaining high-precision three-dimensional coordinate information. Meanwhile, all image collection systems are adjusted independently, and can be flexibly arranged according to the characteristics of a to-be-measured object. Moreover, linear equations with the intersection being the target point are built through the image information of each image collection system, and the distance information of the to-be-measured object is obtained. Therefore, the system and method are easy to achieve the high-precision three-dimensional surface detection at different distances.

Description

technical field [0001] The invention relates to a system and method for detecting the surface shape of a tower-type secondary reflection mirror based on multi-eye ranging, and belongs to the technical field of surface shape detection of reflecting mirrors. Background technique [0002] As a new type of tower-type solar thermal power generation technology, it is installed on the tower-type secondary reflection mirror to reflect the sunlight reflected by the heliostat in all directions to the surface of the heat absorber to obtain higher energy density solar energy for power generation , so the surface accuracy of the tower secondary reflector is a key factor affecting the power generation efficiency. In the actual installation process, if the surface accuracy of the secondary reflector does not meet the requirements, the secondary reflected sunlight may not be accurately irradiated into the heat sink, thereby reducing the power generation efficiency and even affecting the nor...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a tower-type secondary reflection mirror surface type detection system and method based on multi-eye ranging based on the current technology that cannot meet the existing needs. First align the image centers of at least two image acquisition systems Target point, obtain the attitude information of each image acquisition system (that is, the pitch rotation angle and horizontal rotation angle), and then accurately locate the target point in the image respectively, and calculate the deviation angle through the deviation between the target point and the image center in the image coordinate system , and then correct the pitch angle and horizontal angle, and finally obtain high-precision three-dimensional coordinate information. At the same time, each image acquisition system is independently The image information of the system establishes a straight line equation intersecting the target point to obtain the distance information of the target to be measured, so it is easy to realize high-precision three-dimensional surface detection at different distances

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