A heliostat calibration device and calibration method

Abstract

A calibrating device for heliostat comprises a support frame (1), a laser calibrating system mounted on the support frame (1), and a movable motion part (5) mounted in the bottom of the support frame (1). When the support frame (1) is set over a heliostat (2) or a group of heliostats, laser beam is emitted to the heliostat surface. The laser beam forms a light spot after being reflected by the heliostat (2). An incidence point of the laser on the heliostat (2) surface can be obtained by processing the image of the light spot. After that an exact spatial location of the heliostat surface is obtained. Then an actual rotation center of the heliostat (2) is also obtained by obtaining several spatial locations of the heliostat surface. The calibrating device can exactly pick up the light spot by using an image acquisition unit (4), and can calibrate a great quantity of heliostats (2) with high efficiency. A method of obtaining the actual rotation center of the heliostat (2) includes using the calibrating device for heliostat.

Description

technical field [0001] The invention relates to a calibration device and method for a solar tracking calibration device, specifically designing a movable heliostat calibration device capable of real-time calibration of the heliostat. 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 essentially the process of obtain...

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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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