<p>S CI-TECHINNOVATION 2. School of Traffic, Northeast Forestry University, Heilongjiang Harbin 150040 China ） Abstract ： In this paper, in order to efficiently collect and use solar energy, the authors designed a physical device and sys- tem can be used for solar energy automatic tracking light in micro-plant factory. From three aspects of mechanical design, &nbsp;hardware circuit design and design of solar energy automatic tracking light, the authors introduced hardware and software con- stitution of this system, and expounded workflow and software flow of solar energy automatic tracking light. Then, the au- thors determined design scheme of algorithm of solar energy automatic tracking light, and designed hardware circuits of this &nbsp;system, including light intensity measuring circuit, voltage regulator circuit of power management system and double-shaft DC &nbsp;motor drive system circuit. In the end, the authors pointed out that the system realized closed-loop control of double-shaft DC &nbsp;motor, which may greatly improve accuracy and efficiency of automatic tracking light and has important strategic significance &nbsp;on solving energy problems by fully exploiting and utilizing solar energy. Key words ： automatic control; plant factory; automatic tracking light; energy storage; double-shaft control 圖 9 太陽能自動(dòng)追光系統(tǒng)的軟件流程圖 斷電？ 等待 1 s 定時(shí)到？ 啟動(dòng)定時(shí)器 系統(tǒng)初始化 開始 減速電機(jī) 結(jié)束 左右兩側(cè)光照強(qiáng)度 上下兩側(cè)光照強(qiáng)度 光照強(qiáng)度傳感器 加權(quán)后差值在允許范圍內(nèi)？ 加權(quán)后差值在允許范圍內(nèi)？ PWM 推桿電機(jī) PWM 蓄電池電量滿足要求？ 白天？ 開關(guān)電源供電 蓄電池供電 Y N Y N Y N N Y Y Y N N 可 持續(xù)發(fā)展 Sustainable Development 060</p>