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Device and method for automatic calibration of heliostat angle zero point with the sun as reference object

A calibration method and automatic calibration technology, applied in the direction of use feedback control, etc., can solve the problems of low work efficiency, poor calibration accuracy, inconvenient use, etc., and achieve the effect of easy acquisition, high degree of automation, and direct measurement results

Active Publication Date: 2020-02-18
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The purpose of the present invention is to provide a heliostat angle zero point automatic calibration device with the sun as a reference object, which solves the problems of low working efficiency, inconvenient use and poor calibration accuracy of the existing calibration plate method

Method used

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  • Device and method for automatic calibration of heliostat angle zero point with the sun as reference object
  • Device and method for automatic calibration of heliostat angle zero point with the sun as reference object
  • Device and method for automatic calibration of heliostat angle zero point with the sun as reference object

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Experimental program
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Embodiment

[0090] The parameters of camera 1 are:

[0091] Camera focal length: 12mm;

[0092] Photosensitive element pixel size: 0.0032mm;

[0093] Photosensitive element specification: 1280*1024Pix

[0094] Zero point α of the azimuth measuring device before calibration 0 is 0.00 degrees, and the zero point of the elevation angle measuring device β 0 is 0.00 degrees.

[0095] At the beginning of the calibration, set the heliostat tracking controller 6 to the sun-tracking working mode, assuming that the actual azimuth angle of the sun at this moment is 259.44 degrees, and the altitude angle is 37.13 degrees. In order to realize the sun-tracking tracking, the angle set value of the tracking controller It is also the azimuth angle of 259.44 degrees and the altitude angle of 37.13 degrees.

[0096] When the heliostat 5 realizes the sun tracking control, the measured azimuth angle of the heliostat is 259.40 degrees, and the altitude angle is 37.15 degrees

[0097]At this time, the hor...

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Abstract

The invention discloses an automatic calibration device of an angle zero point of a heliostat by taking the sun as a reference object. The automatic calibration device comprises the heliostat. A heliostat tracking controller is installed on the heliostat and is connected with an image correction controller. The image correction controller is connected with an altitude angle measurement sensor and an azimuth measurement sensor. The image correction controller is connected with a camera which is installed on the heliostat through an installation rack. The camera optical axis direction of the camera is parallel to the normal direction of the heliostat. The invention also discloses a method for calibration by use of the above calibration device. According to the invention, the calibration working efficiency is high; measurement results are precise and reliable; calibration is easy and quick; and automation degree is high.

Description

technical field [0001] The invention belongs to the technical field of automatic detection, and in particular relates to an automatic calibration device for the angle zero point of a heliostat with the sun as a reference object, and also relates to a calibration method using the above-mentioned device. Background technique [0002] In the tower solar thermal power generation system, the role of the heliostat is to accurately reflect the sun's incident light to the heat collector for collecting solar radiation energy. Since the altitude and azimuth angle of the sun relative to the heliostat are constantly changing with the movement of celestial bodies, in order to achieve focus control, it is necessary to equip the heliostat with an automatic support system with dual-axis tracking function. [0003] The automatic tracking focus control of the heliostat is divided into the following steps: [0004] 1) According to the longitude, latitude and time of the installation position ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D3/12
CPCG05D3/12
Inventor 赵跃华文瀚
Owner XIAN UNIV OF TECH
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