Surface shape calibrating method of spherical surface sun heliostat

A calibration method and heliostat technology, applied in the testing, measuring devices, instruments, etc. of machines/structural components, can solve problems such as heavy workload, and achieve the effect of an efficient calibration method

Inactive Publication Date: 2008-11-12
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If regular calibration of the surface shape of the heliostat is required, the workload will be even greater

Method used

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  • Surface shape calibrating method of spherical surface sun heliostat
  • Surface shape calibrating method of spherical surface sun heliostat
  • Surface shape calibrating method of spherical surface sun heliostat

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] Embodiment of the present invention is 64m 2 The spherical heliostat, the spherical radius R is 600m, and the artificial light source is a xenon lamp with a light exit diameter of 150mm.

[0035] The structure of the heliostat is as figure 1 As shown, the heliostat includes a reflector, a support frame 2 , a transmission system 3 and a tracking control system, and the transmission system 3 connects the support frame 2 and the column 4 . The transmission system 3 realizes fixed-day tracking through the horizontal-tilt dual-axis rotation tracking method. The overall reflection surface of the heliostat is a spherical surface, and the actual reflection surface shape is composed of 16 spherical sub-mirrors 1 of 2m×2m. Each sub-mirror 1 has the same surface shape as the overall spherical surface. Each sub-mirror passes through a single-poin...

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PUM

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Abstract

The present invention provides a spherical heliostat profile calibration method comprising the steps of placing an artificial light source (34) in the centre of the heliostat with the direction determined for emitting divergent beams that are approximately homocentric with the heliostat to cover the aperture of the heliostat; observing the light source imaging position on the reflecting surface of the heliostat through eyes or a telescope (36) using a position near the light source as an observing position; adjusting the incline angle of a sub-mirror (1) relative to a reference plane (32) by using a supporting mechanism of the sub-mirror to a proper angle at which the light source imaging occurs in the center area of the sub-mirror; adjusting all the incline angles of the sub-mirrors according to the prior step to complete the surface shape calibration of the whole heliostat. The method having no special requirement of surface planeness and profile error in the present invention is simple to perform and has a high efficiency. And heliostats can also be adjusted and calibrated at night by using the method.

Description

technical field [0001] The invention relates to a method for calibrating the surface shape of a heliostat by using an artificial light source, in particular to a method for calibrating the surface shape of a heliostat with a spherical reflective surface. Background technique [0002] The heliostat is a concentrating device in a solar tower concentrating system, which reflects and concentrates sunlight to a fixed target through a tracking mechanism. Heliostats include five major parts, including reflectors, support frames, columns, transmission and tracking control systems. [0003] Generally, the overall reflective surface of the heliostat is designed as a spherical surface or an approximate spherical surface. In practical applications, the reflective surface of a large heliostat is composed of several sub-mirrors. Each sub-mirror is installed on the support frame through a single point at the center of the mirror or a multi-point support mechanism at the edge of the mirro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02G01M11/00G01B11/00G02B7/183G02B7/185
Inventor 郭明焕刘晓冰王志峰王晓宇张喜良梁文峰刘鸿孙刚
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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