【正文】 學(xué) 號(hào) 指導(dǎo)教師 二 OO 七 年 六 月 九 日 裝 訂 線 ……………….……. …………. …………. ……… i 目錄 摘要 ..........................................................I Abstract .....................................................II 引言 ..........................................................1 ........................................3 基本設(shè)計(jì)原則 ............................................3 控制系統(tǒng)方案選擇 ........................................3 基于 51 單片機(jī)電冰箱系統(tǒng)的整體布局 .......................4 功能原理分析 ............................................5 ..............................................5 單片機(jī)的選擇 ............................................7 AT89C51 的特點(diǎn) ......................................7 管腳說明 ............................................7 振蕩器特性和時(shí)鐘電路 ...............................10 芯片擦除 ...........................................11 A/D 轉(zhuǎn)換電路 ...........................................11 ADC0809 介紹 .......................................12 ADC0809 與 AT89C51 單片機(jī)接口電路 ...................17 鍵盤電路及顯示電路 .....................................18 功能件及顯示電路 ...................................18 74LS164 介紹 .......................................20 溫度采集電路和除霜電路 .................................21 溫度采集電路 .......................................21 除霜電路 ...........................................22 傳感器的選擇 .......................................22 制冷壓縮機(jī)和除霜電熱絲啟、停控制電路 ...................24 電路圖 .............................................24 工作原理 ...........................................24 74LS273 介紹 .......................................25 ii 電源電壓檢測(cè)電路 .......................................26 報(bào)警電路 ...............................................26 .............................................27 ............................................27 匯編語言格式 .......................................27 匯編語言構(gòu)成 .......................................28 程序主要模塊 ...........................................28 主程序模塊 .........................................28 T0 中斷服務(wù)程序模塊 ................................30 T1 中斷服務(wù)程序模塊 ................................31 4．控制系統(tǒng)總電路 ............................................32 參考文獻(xiàn) .....................................................34 致謝 .........................................................35 附錄 .........................................................36 iii Contents Abstract ....................................................... I Introduction ....................................................1 programme design .........................................3 The option of control system ..................................3 The option of control system ..................................3 The whole layout of 51 Microcontrollers control system of Electric refrigerator ..........................................4 The analysis of function and principle ..........................5 hardware design ......................................5 The option of singlechip microcontrollers ......................7 The property of AT89C51 ................................7 Pin explanation .........................................7 The property of oscillator and Clock circuit..................10 Chip erase ............................................11 The conversion circuit of A/D ................................ 11 The introduction of ADC0809 ............................12 The interface circuit of ADC0809 and AT89C51 ..............17 Keyset circuit and display circuit .............................18 Function keys and display circuit ..........................18 The introduction of 74LS16419 ...........................20 Temperature collection circuit and eliminate hoarfrost circuit .......21 Temperature collection circuit ............................21 Eliminate hoarfrost circuit ...............................22 The option of quick sensor ...............................22 Refrigeration pressor and galvanothermy thread control circuit ..24 The electric picture .....................................24 iv Working principle ......................................24 The introduction of 74LS273 .............................25 The power supply electiric voltage examination electric circuit ......26 Alarm circuit .............................................26 software design .....................................27 Programme design language .................................27 The format of assembly language..........................27 The position of assembly language .....................28 Major program modular ....................................28 Main program modular .................................28 T0 interrupt program modular ............................30 T1 interrurt program modular.............................31 whole electeic picture pf control system ........................32 Reference .....................................................34 Acknoledgement .............................................. 35 Appendix .....................................................36 I 基于 51 單片機(jī)的電冰箱控制系統(tǒng) 作者： XX 指導(dǎo)教師： XX 講師 【 摘要 】 傳統(tǒng)的機(jī)械式直冷式電冰箱的控制原理是根據(jù)蒸發(fā)器的溫度控制制冷壓縮機(jī)的啟、停，使電冰箱內(nèi)的溫度保持在設(shè)定溫度范圍內(nèi)。 本論文介紹了一種用單片機(jī)開發(fā)的智能電冰箱控制系統(tǒng)。論文的內(nèi)容包括實(shí)現(xiàn)控制系統(tǒng)軟硬件的合理設(shè)計(jì)及匹配等設(shè)計(jì)。 and it will stop refrigerating and close the pressor when its temperature is below 10~20℃ . This article introduces an intelligent control system of electric refrigerator. The control system puts AT89C51 as its kernel to control the start and stop of the refrigeration pressor. It solves the insufficient problem of the control system of traditional and makes cont