Mechanical-error calibration method for heliostat

Abstract

The invention relates to a mechanical-error calibration method for a heliostat, which is based on the application of a heliostat real-time follow-up solar device of a tower type solar energy heat-collection system. The method comprises the following steps: judging the position of a light spot on a heat collector through images shot by a camera; comparing the mass centre position of the light spot with an appointed position, if deviation occurs, showing that mechanical error of the heliostat exists, at the moment, recording the elevation angle and azimuth angle of the sun, as well as those of the heliostat when light spot deviates, the height of a heliostat bracket and position coordinates of the heliostat bracket relative to the center spot of the heliostat heat collector; calculating the coordinates of the deviated heliostat mass centre relative to the mass centre position of the original heliostat through a computation module; converting the deviation amount of the heliostat center spot into deviation amount of the mass centre point of the heat collector through a coordinate system, and building a new heliostat center spot; determining the appointed position coordinates of the heat collector under a coordinate system taking the new heliostat center spot as an origin; and taking the heliostat having the mechanical error as a criteria, re-calculating and re-sending so as to realize the tracking of the heliostat, and projecting the light spot data, thereby achieving the purposes of high-efficiency tracking and sunlight spot projection.

Description

technical field [0001] The invention relates to the technical field of tower-type solar heat collection systems, in particular to a method for calibrating mechanical errors of heliostats. Background technique [0002] During the long-term operation of the heliostat, due to external factors such as wind and gravity, the supporting frame structure of the heliostat is deformed, resulting in an error when the heliostat tracks and projects the light spot. This error is called a mechanical error. In order to ensure that the heliostat can project the light spot with high precision, it is necessary to research and develop the calibration method and device of the mechanical error. [0003] At present, the existing technology can realize the accurate alignment of the heliostat and the heat collector during the installation of the mirror field, and can correct the errors caused by mechanical deformation and foundation settlement during the long-term operation of the mirror field. But ...

AI Technical Summary

Problems solved by technology

But the disadvantage is that the existing technology only corrects the mechanical error at a certain moment, but it cannot realize the mechanical error calibration function of tracking travel in any period, that is, except the time when the mechanical error is calibrated, other time timing The mirror still has mechanical errors or the error is relatively large when projecting the light spot, and it needs to be calibrated again, which takes more time and increases the cost

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