【正文】 time, another small gear is rotated by another stepper motor according to the control the large gear and the solar panels are rotated by the small gear in order to track to achieve the vertical direction. Solar is tracked by the two stepper motors together. Second, control system part is designed. Control system mainly includes the sensors part, stepper motor, MCU system and the corresponding external circuit, and so on. Photoelectric detection system is used to track solar. Sensors use photosensitive resistance. The two same photosensitive resistances were placed in east and west direction of the bottom edge .When the two photosensitive resistances received different light at the same time, the signal from parison circuit is sent to MCU in order to rotate stepping motors. Keywords Solar energy Tracking Photosensitive resistance SCM Stepping motor I 目 錄 1 緒論 ........................................................................................................................................... 1 課題來(lái)源 ................................................................................................................................ 1 課題背景 ................................................................................................................................ 1 能源現(xiàn)狀及發(fā)展 .............................................................................................................. 1 我國(guó)太陽(yáng)能資源 ............................................................................................................. 1 目前太陽(yáng)能的開發(fā)和利用 ............................................................................................. 2 太陽(yáng)能的特點(diǎn) .................................................................................................................. 2 課題研究的目的 ................................................................................................................. 2 研究課題的意義 .................................................................................................................... 2 新環(huán)保能源 ..................................................................................................................... 2 提高太陽(yáng)能的利用率 ..................................................................................................... 3 太陽(yáng)能利用的國(guó)內(nèi)外發(fā)展現(xiàn)狀 ............................................................................................ 3 太陽(yáng)追蹤系統(tǒng)的國(guó)內(nèi)外研究現(xiàn)狀 ........................................................................................ 4 論文的研究?jī)?nèi)容 .................................................................................................................... 5 論文結(jié)構(gòu) ................................................................................................................................ 5 2 太陽(yáng)能自動(dòng) 跟蹤 系統(tǒng)總體設(shè)計(jì) ................................................................................................. 6 太陽(yáng)運(yùn)行的規(guī)律 .................................................................................................................... 6 跟蹤器機(jī)械執(zhí)行部分比較選擇 ............................................................................................ 6 立柱轉(zhuǎn)動(dòng)式跟蹤器 ......................................................................................................... 6 陀螺儀式跟 蹤器 ............................................................................................................. 7 齒圈轉(zhuǎn)動(dòng)式跟蹤器 .......................................................................................................... 7 本課題的機(jī)械設(shè)計(jì)方案 ................................................................................................. 8 跟蹤方案的比較選擇 ............................................................................................................ 8 視日運(yùn)動(dòng)軌跡跟蹤 .......................................................................................................... 9 光電跟蹤 .......................................................................................................................... 9 視日運(yùn)動(dòng)軌跡跟蹤和光電跟蹤相結(jié)合 ........................................................................ 11 本設(shè)計(jì)的跟蹤方案 ....................................................................................................... 12 3 機(jī)械設(shè)計(jì)部分 ......................................................................................................................... 13 太陽(yáng)能自動(dòng)跟蹤系統(tǒng)機(jī)械設(shè)計(jì)方案 .................................................................................. 13 第一齒輪轉(zhuǎn)動(dòng)計(jì)算 .............................................................................................................. 13 材料選擇 ........................................................................................................................ 13 尺寸計(jì)算 ........................................................................................................................ 13 校核計(jì)算 ........................................................................................................................ 14 齒根彎曲疲勞強(qiáng)度驗(yàn)算 ............................................................................................... 15 II 第二齒輪轉(zhuǎn)動(dòng)計(jì)算 ............................................................................................................. 17 材料選擇 ........................................................................................................................ 17 尺寸計(jì)算 ........................................................................................................................ 17 校核計(jì)算 ........................................................................................................................ 17 齒根彎曲疲勞強(qiáng)度驗(yàn)算 ............................................................................................... 19 軸瓦校核計(jì)算 ...................................................................................................................... 20 大軸瓦校核計(jì)算 ........................