太阳光谱辐照度仪自动跟踪装置的设计与测试

为了实现太阳光谱辐照度的高精度观测，提出了视日运动轨迹和光电跟踪相结合的太阳自动跟踪方案，详细论述了视日运动跟踪计算原理和基于四象限探测器的跟踪装置设计。为检测该装置的跟踪精度，设计了基于线阵CCD探测器的跟踪精度检测系统，并开展了室外观测实验。测试结果表明，太阳跟踪精度为±0.030°，稳定性优于1.4%，所设计的太阳跟踪装置在跟踪精度和稳定上均能够满足太阳光谱辐照度观测的高精度跟踪要求。

Design and Test of Automatic Sun-Tracking Device for Solar Irradiance Spectroradiometer

In order to achieve high-precision observations of solar spectral irradiance, a method which combines solar motion trajectory tracking and four-quadrant detector based photoelectric tracking was adopted. The principles of solar motion trajectory tracking and the design of the tracking device based on four-quadrant detector were discussed in detail. To test the tracking precision of the device, a test system based on linear CCD was designed, and the outdoor experiment was done. The results show that the sun-tracking accuracy of the device is better than±0.030, and the stability is better than 1.4% , which meet the requirements of the high precision spectral irradiance observation.