本研究以發展更省電的太陽能追蹤系統為主要目標,經由模擬發現太陽焦點軌跡的特殊曲線,利用此曲線設計出太陽焦點軌跡追蹤集能系統,此系統包含:砷化鎵(GaAs)太陽能電池、太陽焦點軌道機構、Fresnel lens、步進馬達與其驅動器、兩組光敏電阻、兩個微動開關、微控制器PIC18F4480。 本追蹤系統的特點有以下兩點:(1)太陽焦點軌跡追蹤機構設計可以讓馬達的一維直線運動變成太陽能電池做二維的運動。(2)系統利用透鏡聚焦增加可吸收的太陽輻射,但是並不一起轉動聚光透鏡與太陽能電池模組,而是只動體積小且輕的砷化鎵太陽能電池,此作法大幅減少了馬達的耗電量。(3)利用光敏電阻感測器配合太陽焦點軌跡追蹤集能機構設計的追蹤邏輯來追蹤太陽。
The research develops a more economizing solar tracker. By simulation sun focusing trajectory as a special curve, the design of Focusing Trajectory Tracking Solar Collector is established based on the curve shape. The system contains: GaAs solar cell, focusing trajectory mechanism, Fresnel lens, a stepping motor and its driver, photosensitive resistors, switches, and a microcontroller PIC18F4480. The following is features of the tracking solar collector. (1) Due to the design of focusing trajectory mechanism, one dimension move of the stepping motor can drive two dimension movement of the solar cell. (2)There is a Fresnel lens to concentrate light, but the motor is unnecessary to drive both lens and solar cell, just drive small and light solar cell. This design can substantially reduce power consumption of the motor. (3)Using photosensitive resistors as sensors in accordance with focusing trajectory tracking solar collector looks for a tracking logic to track the Sun.