智能型太阳能跟踪系统设计与实现

在主动式跟踪太阳能热发电系统中，要求计算太阳位置以实现跟踪，提高发电效率。对于开环控制的太阳能跟踪系统，太阳位置的计算精度尤为重要。采用水平-俯仰双轴坐标系统，利用32位ARM (advanced RISC machine)公司的嵌入式微处理器，以步进电机作为执行机构，提出了基于程控跟踪和光电跟踪相结合的复合跟踪方式，并采用基于J2000.0为基准历元的太阳位置计算系统，减小了计算误差，提高了跟踪精度。该跟踪装置是一种能根据不同地理位置和时间自动计算太阳运行参数，通过光电检测构成反馈回路，实现在不同环境下自动跟踪的智能型跟踪装置。

Design and Implementation of An Intelligent Sun-Tracking System

In a solar energy power generation system using active sun-tracking technology,it is necessary to calculate solar position to implement accurate sun-tracking and improve power generation efficiency. For an open loop controlled sun-tracking system,the computation accuracy of solar position is especially important. By means of dual-axis horizontal and pitching coordinate system and by use of 32-bit ARM embedded microprocessor as well as using stepping motor as the actuator,a composite tracking mode combining programmed tracking with photoelectric tracking is proposed. By use of the solar position calculation system that takes J2000.0 as fundamental epoch,the calculation error is reduced as well as the tracking accuracy is improved. The presented tracking device is an intelligent sun-tracking device that can automatically calculate operational parameters of the sun according to different geographical positions and times and adopts photoelectric detection in its feedback loop,therefore,the automatic sun-tracking under various environments is implemented.