【正文】 demands. KEY WORDS clothes hanger singlechip microputer lift control alarm 自動晾衣架控制系統(tǒng)設計 目 錄 中文摘要 .............................................................................................................................. I 英文摘要 ............................................................................................................................III 1 緒論 ................................................................................................................................1 自動晾衣架介紹 ..............................................................................................1 晾衣架的歷史及現狀 .....................................................................................1 晾衣架行業(yè)的發(fā)展及未來 ............................................................................2 2 整體電路設計 .............................................................................................................4 自動晾衣架整體框圖 .....................................................................................4 系統(tǒng)的主要部件方案論證與比較 ..............................................................4 處理器的選擇與論證 ................................................................................5 驅動電機的選擇與論證 ............................................................................5 直流電機驅動電路的選擇與論證 ............................................................5 穩(wěn)壓電源方案選擇與論證 ........................................................................6 系統(tǒng)各模塊的最終方案 ................................................................................6 3 基本元器件介紹及各部分電路設計 ...................................................................8 直流電機的運行原理 .....................................................................................8 直流電機的結構 ........................................................................................8 直流電機的基本工作原理 ........................................................................8 直 流電機的額定值 .................................................................................. 10 單片機原理 ...................................................................................................... 11 單片機原理概述 ...................................................................................... 11 單片機的應用系統(tǒng) .................................................................................. 11 AT89C51 簡介 ........................................................................................... 13 自動晾衣架控制系統(tǒng)設計 其它主要器件介紹 ........................................................................................ 17 NE555 介紹 ............................................................................................... 17 集成運放 LM358 介紹 .............................................................................. 19 繼電器的介紹 .......................................................................................... 20 光耦介紹 .................................................................................................. 22 串行下載口介紹 ...................................................................................... 23 各部分電路設計 ............................................................................................ 25 電源電路 .................................................................................................. 25 時鐘電路 .................................................................................................. 27 復位電路 .................................................................................................. 28 按鍵電路 .................................................................................................. 29 超重檢測電路 .......................................................................................... 29 狀態(tài)指示電路 .......................................................................................... 30 聲光報警電路 .......................................................................................... 31 過流保護電路 .......................................................................................... 32 控制電機正反轉電路 .............................................................................. 33 串口電路 ................................................................................................ 34 4 系統(tǒng)的軟件各部分設計與實現 ........................................................................... 36 超重檢測部分 ................................................................................................. 36 上升部分 .................................................... 36 下降部分 .......................................................................................................... 37 過流中斷部分 ................................................................................................. 38 5 設計總結 ..................................................................................................................... 39 致 謝 ................................................................................................................................ 40 參考文獻 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