【正文】 路等，運用 Keil 軟件編程，利用 Proteus 仿真來實現(xiàn)其功能 。 關(guān)鍵詞 ：單片機；智能開關(guān)； DS18B20 基于 AT89C51單片機單片機的智能開關(guān)設(shè)計 II Design of Intelligent Switch Based on the AT89C51 MCU ABSTRACT People can more easily control devices with the occurrence of the emergence of intelligent switches which has brought great convenience to people’s lives. The microcontroller is constantly been used, and it is more extensive, the reason lies in its low power consumption, easy to use, small size, some features. This design aims to do a systematic study of the emergence of intelligent switch which based on the AT89C51 MCU of design theory and method. the AT89C51 MCU play the core role in this design, and bined with peripheral ponents the buzzer, relays, the DS18B20, digital tube, etc. by which design the switch of control of the work and rest time and the airconditioning temperature monitoring and alarm function of the intelligent. the design using Protel software design temperature data acquisition circuit alarm circuit, display circuit, the use of the Keil software programming, Proteus simulation to achieve its function. this design is flexible, simple to modify, and more secure in the process of using energysaving microcontroller to monitor realtime temperature. To a certain extent, not only improve the function of the air conditioner, but also simplified the air conditioning control and operation of the air conditioning . Key words: MCU。 DS18B20 榆林學院本科畢業(yè)設(shè)計 (論文 ) III 目 錄 摘 要 ................................................................................................................................. I ABSTRACT ..................................................................................................................... II 1 緒論 ...............................................................................................................................1 本設(shè)計的意義 ......................................................................................................1 智能開關(guān)的發(fā)展現(xiàn)狀 ..........................................................................................1 本章小結(jié) .............................................................................................................2 2 智能開關(guān)的方案設(shè)計 ...................................................................................................3 本設(shè)計的性能指標 .............................................................................................3 溫度采集方式的選擇 .........................................................................................3 蜂 鳴器的選擇 ......................................................................................................3 繼電器的選擇 ......................................................................................................3 總體結(jié)構(gòu)設(shè)計 ......................................................................................................4 本章小結(jié) .............................................................................................................4 3 硬件電路設(shè)計 ...............................................................................................................4 單片機最小系統(tǒng)設(shè)計 ..........................................................................................5 AT89C51 單片機簡介 ................................................................................5 時鐘電路設(shè)計 ...........................................................................................5 復(fù)位電路設(shè)計 ...........................................................................................6 電源電路設(shè)計 ......................................................................................................7 溫度采集電路設(shè)計 .............................................................................................8 溫度傳感器 DS18B20 簡介 .....................................................................9 溫度采集接口設(shè)計 ................................................................................. 11 報警電路設(shè)計 ................................................................................................... 11 顯示電路設(shè)計 ...................................................................................................12 鍵盤電路設(shè)計 ...................................................................................................13 本章小結(jié) ...........................................................................................................14 4 軟件設(shè)計 .....................................................................................................................15 主程序設(shè)計 ...............................................................................................................15 時間控制程序設(shè)計 ............................................................................................16 溫度報警程序設(shè)計 ...........................................................................................16 四位數(shù)碼管顯示程序設(shè)計 ...............................................................................17 基于 AT89C51單片機單片機的智能開關(guān)設(shè)計 IV 本章小結(jié) ...........................................................................................................18 5 系統(tǒng)仿真 .....................................................................................................................20 proteus 簡介 .......................................................................................................20 keil 軟件介紹 ...................................................................................