【正文】 tree will be the market leading products. This design use the singlechip microputer AT89C51 as automatic clothes hanger detection and control core .using resistance strain gauge realize overweight detection, through manual buttons to control clothes hanger up or down. through the leds to display the clothes hanger working the same time,it has the overweight soundlight alarm circuit. this system also increased dc motor of the overcurrent protection part adopts modular design thought, piled the flowchart of each module. realized to dc motor positive amp。本設計 具有靈活方便、適用范圍廣的特點，基本能夠滿足實踐需求。 本設計采用單片機 AT89C51 作為自動晾衣架的檢測及控制核心，采用電阻應變片實現(xiàn)超重檢測， 通過手動按鍵控制晾衣架的升降，通過發(fā)光二極管顯示晾衣架的工作狀態(tài)，同時具有超重聲光報警作用，該系統(tǒng)還增加了直流電機的的過流保護功能以及電氣隔離功能。自動晾衣架控制系統(tǒng)設計 I 基于 51 單片機 自動晾衣架控制系統(tǒng)設計 摘 要 智能自動晾衣架能夠實現(xiàn)晾衣架的自動升降，衣服超重的自動檢測及系統(tǒng)故障保護等功能。與傳統(tǒng)的手動晾衣架相比，自動晾衣架具有 升降更省力 ， 升降速度更快 等優(yōu)勢，隨著技術的日臻完善，自動晾衣架將成為市場的主導產(chǎn)品。 軟件部分采用模塊化設 計思想，編制了各個模塊的流程圖，實現(xiàn)了對晾衣架升降控制，狀態(tài)顯示等功能。 自動晾衣架控制系統(tǒng)設計 II AUTOMATIC CLOTHES HANGER CONTROL SYSTEM DESIGN ABSTRACT Intelligent automatic clothes hanger which is able to realize automatic lift the clothes hanger, automatic detection clothes are overweight or not, system39。 reverse control and state display design is agile and convenient, widely use .Basicly can satisfy the practice 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 ............................................................................................................................. II 1 緒論 ................................................................................................................................1 自動晾衣架介紹 ..............................................................................................1 晾衣架的歷史及現(xiàn)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(xiàn) ........................................................................... 36 超重檢測部分 ................................................................................................. 36