A heliostat calibration device and calibration method

Abstract

A heliostat calibration device comprises a support frame (1), an image acquisition unit (2) and an image processing unit. The image acquisition unit (2) picks up image information from a heliostat (3) surface directly, and transmits the image information to the image processing unit. The image processing unit obtains the spatial location information of the heliostat (3) surface in accordance with the image information and the spatial location information of the image acquisition unit (2) and of the support frame (1). The image processing unit determines the actual rotation center of the heliostat surface by obtaining several sets of spatial location information of the heliostat surface, and completes calibration of the heliostat (3). The heliostat calibration device acquires image information from the heliostat (3) surface with a high degree of accuracy by means of direct image acquisition by the image acquisition unit. The calibration device is equipped with several movement modes in order to calibrate a great number of heliostats (3) with high efficiency. A method for obtaining the actual rotation center of the heliostat (3) utilizes the heliostat calibration device.

Description

technical field [0001] The invention relates to a calibration device and method for a solar tracking calibration device, and specifically designs a movable heliostat calibration device and a calibration method capable of correcting a heliostat in real time. Background technique [0002] A heliostat is an optical device used to reflect the light of the sun or other celestial bodies to a fixed direction. It reflects and gathers sunlight to a certain target through a tracking mechanism. The existing heliostats include reflectors, supporting frames, columns , transmission and tracking data processing system and other five major parts. However, during the use of the heliostat, due to the influence of various factors, the accuracy of the tracking mechanism may be reduced, resulting in the reflected light of the sun not being reflected to the target position, which requires the precision of the heliostat to calibrate. [0003] The calibration process of the heliostat is essential...

AI Technical Summary

Problems solved by technology

[0009] The installation posture measurement device in the above scheme is applied in the process of installing the reflector of the heliostat. After the focus position of the heliostat is determined, the direction of the incident laser light is known, so if the reflected laser light is to be reflected to the focus of the heliostat It must pass through the imaginary point on the laser measuring part. When performing this process, the relative position between the support member and the heliostat must be guaranteed to be a certain value. When the heliostat rotates or due to long-term use When an error occurs during the rotation process, the focus position may be deviated, the angle between the incident laser light and the reflector may change, and the imaginary point that the reflected laser light must pass through also changes. The above process needs to be remeasured. Therefore, the above device Real-time correction of the rotation axis of the heliostat cannot be realized; in addition, in the process of measuring the installation posture, it is necessary to constantly try to judge whether the installation position is accurate through the reflected laser through the false point, and the operation process is very cumbersome

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