Quantitative focusing method of solar concentrator mirror based on vision measurement

Abstract

The invention discloses a visual measurement-based quantitative focusing method for solar concentrator mirrors. The implementation steps are as follows: 1) Fix the grid structure of the concentrator, calibrate the reflection mirror surface to be formed and the global coordinate system O-xyz of visual measurement ;2) Paste 3 circular signs distributed in a triangle on the mirror surface of the mirror unit, and fix the mirror unit on the grid structure; 3) Measure the coordinates of the center points of the 3 circular signs; 4) Calculate the space of the mirror unit pose, and the coordinates of the center of the spherical joint of the support-adjustment structure; 5) Calculate the adjustment amount of the ball stud of each support-adjustment structure; 6) Adjust each ball screw to complete the quantitative correction of the mirror unit. The mirror unit of the present invention is simple to focus, can quickly determine the spatial pose of the mirror unit, and eliminate the axis vector error of the mirror unit in one step, and can be applied to the pose calibration of different types of condenser mirrors, which can effectively Adapt to the high-efficiency and low-cost focusing needs of condenser mirror installation.

Description

technical field [0001] The invention relates to the field of solar thermal power generation, in particular to an adjustment technology for mirror installation of solar concentrators, in particular to a quantitative focusing method for solar concentrator mirrors based on visual measurement. Background technique [0002] The concentrator is a precision optical device that realizes the directional transmission and concentration of solar energy, and is an important equipment for solar thermal power generation systems. Large-scale concentrators are generally spliced ​​by several mirror units, and their optical performance depends on the surface shape accuracy and installation accuracy of the mirror units. Any error in any link will affect the entire service period of the concentrator, which will affect the power generation of the solar thermal power station. Significant impact on quantity and economic performance. However, the manufacturing and installation accuracy of the steel...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent (CN 104062743 A) discloses an automatic focusing system and focusing method for adjusting solar concentrating mirrors. This method mainly judges the approximate orientation of the tilt angle by observing the image color of the reflector, and calculates The proportion of each color on the disc is compared with the pre-stored experience database at the same time to obtain the corresponding adjustment actions of the operator. This technology requires repeated adjustments to the mirror unit, and cannot accurately obtain the adjustment amount and adjustment sequence of the operator on the mirror unit. , the adjustment efficiency is low

However, this technology still requires repeated visual measurement and mirror adjustment, and cannot achieve quantitative one-time adjustment of the mirror unit. The focusing process of the mirror unit takes a long time, and there is still the problem of low adjustment efficiency.

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