【正文】 is an automatic feedback control system. STC89C52 microcontrollerbased control unit, temperature sensor DS18B20 temperature control system. Main modules: the main control unit module, the temperature detection module 1602 LCD module, the key input module, the buzzer alarm module, temperature control module. Key words: STC89C52 SCM DS18B20 1602 LCD main control unit 南昌工程學(xué)院本科畢業(yè)設(shè)計（論文） III 目錄 摘要 ................................................................................................................................................... I Abstract .............................................................................................................................................II 第一章 總體設(shè)計方案 ........................................................................................................................ 1 智能溫控系統(tǒng)設(shè)計方案論證 ................................................................................................. 1 方案要求 ............................................................................................................................. 1 方案總體設(shè)計框圖 ............................................................................................................... 1 方案選擇 ............................................................................................................................. 3 主控單元的選擇 ........................................................................................................ 3 溫度檢測單元的選擇 ................................................................................................. 3 溫度顯示器件的選擇 ................................................................................................. 5 第二章 各單元模塊的硬件設(shè)計 .......................................................................................................... 6 系統(tǒng)主要器件的介紹 ............................................................................................................ 6 AT89C52單片機(jī)的介紹 .............................................................................................. 6 1602LCD液晶顯示的介紹 ........................................................................................... 9 DS18B20數(shù)字溫度傳感器介紹 .................................................................................. 14 各部分電路設(shè)計 ................................................................................................................. 17 晶振 電路和復(fù)位電路 ............................................................................................... 17 按鍵輸入電路 .......................................................................................................... 18 溫度采集電路 .......................................................................................................... 19 液晶顯示電路 .......................................................................................................... 19 報警電路 ................................................................................................................. 20 溫度控制電路 .......................................................................................................... 21 第三章 軟件部分 ............................................................................................................................. 22 系統(tǒng)主程序流程圖 ............................................................................................................. 22 總結(jié) ................................................................................................................................................ 23 參考文獻(xiàn) ......................................................................................................................................... 24 附錄一：電路原理圖 ........................................................................................................................ 26 附錄二：仿真圖 ..................................................................................................... 錯誤 !未定義書簽。 including hardware circuit and measuring principle 。 關(guān)鍵字： STC89C52單片機(jī) DS18B20 1602液晶 主控單元 南昌工程學(xué)院本科畢業(yè)設(shè)計（論文） II Abstract In a variety of modern industrial production, with the rapid development of electronic technology and microputer microputer measurement and control technology has been rapid development and wide application. Traditional manual monitoring is gradually due to the presence of a lot of the shortings of intelligent electronic monitoring replaced. Designed primarily to do the work of the fo