基于光敏电阻的高精度自动跟日系统

High Precision Automatic Tracking System Based on Photosensitive Resistance

为提高太阳能的利用率,解决太阳光的时变性、分散性问题,提出一种基于光敏电阻实现阳光信号采集的自动跟日系统。设计了新型八点半球形太阳方位信号传感器,通过内部两组传感器的位置分布和组合,粗调与细调相结合,对太阳方位角信号进行大范围搜索、小范围调节,从而控制跟踪控制系统实现对太阳光的高精度自动跟踪。分析了太阳光方位信号传感器的内部结构设计及原理、自动跟踪系统的控制过程及原理。结果证明,系统在低成本情况下实现高精度自动跟踪,抗干扰性强,实用性强,对于在光伏发电、光热发电领域推广太阳能应用具有很重要的意义。

In order to improve the availability of solar energy and solve the problems of time-varying and dis-persion of sunlight, a kind of automatic tracking system for sunlight signal acquisition is introduced based on photo-sensitive resistance. A new type of eight points hemisphere sun azimuth signal sensor is designed. Through positiondistribution and combination of the two groups of sensors in the tracking system, coarse and fine tuning together, thesun azimuth signal is searched in a large range and adjusted in a small range so as to control the tracking system torealize tracking the sunlight accurately and automatically. The internal structure design and the principle of the sun-light azimuth signal sensor, the control process and the principle of the automatic tracking system are analyzed. Ex-perimental results show that a high precision automatic tracking is realized in the case of low cost, a strong anti-in-terference and practicability, which has a very vital significance for the solar energy application promotion in thefield of photovoltaic and thermal power generation.