【正文】 度之間時打開風扇弱風檔，當溫度升高超過所設(shè)定的溫度時自動切換到大風檔，當溫度小于所設(shè)定的溫度時自動關(guān)閉風扇，控制狀態(tài)隨外界溫度而定。s fan, now widely used on laptops smart CPU fan, etc. Design based on single chip microputer temperature control fan system, this paper USES the single chip microputer as controller design for a temperature control fan system, have sensitive temperature sensor and display function, system AT89C52 single chip microputer as control platform to control the fan speed. High and low temperature can be set by the user, the measured temperature value between high and low temperature when open the fan weak wind, when the temperature exceeds the set temperature automatically switch to the wind, when the temperature is less than the set temperature automatically shut down the fan, control state varies with temperature. Set high and low temperature values stored in internal temperature 2 sensor DS18B20 E2ROM, still can keep the power lost when the last value, stable performance and control accuracy. Key words: single chip, DS18B20, the temperature control, fan, AT89C52 single chip 目錄 前言 ....................................................................... 3 第一章 溫控電風扇的簡介與基本系統(tǒng) .......................................... 4 .................................................... 4 ................................................ 5 第二章 溫控電風扇的方案論證 ................................................ 6 .................................................... 6 ...................................................... 7 .................................................. 7 ...................................................... 7 3 第三章 溫控電風扇的硬件設(shè)計 ................................................ 8 .................................................... 8 DS18B20 單線數(shù)字溫度傳感器簡介 ................................ 8 AT89C52 單片機簡介 ............................................ 9 八段 LED 數(shù)碼管 .............................................. 11 ..................................................... 11 電源電路 ..................................................... 11 數(shù)碼管顯示電路 ............................................... 12 聲響、溫度采集、溫度設(shè)定以及復(fù)位電路 ......................... 12 溫控自動電路 ................................................. 13 ................................................. 14 第四章 溫控電風扇的軟件設(shè)計 ............................................... 16 ......................................... 16 ......................................... 17 程序設(shè)計原理 ................................................. 17 主要程序 ..................................................... 18 第五章 系統(tǒng)調(diào)試 ........................................................... 19 軟件調(diào)試 .......................................................... 19 按鈕 顯示部分 的調(diào)試 ........................................... 19 DS18B20溫度采集部分調(diào)試 ................................ 16 電動機調(diào)速電路部分調(diào)試 ....................................... 20 硬件調(diào)試 .......................................................... 16 按鈕 顯示部分的調(diào)試 ........................................... 20 傳感器 DS18B20溫度采集部分調(diào)試 ............................... 20 電動機調(diào)速電路部分調(diào)試 ....................................... 21 系統(tǒng) 性能 .......................................................... 21 系統(tǒng)實現(xiàn)的 性能 ............................................... 21 系統(tǒng) 性能 分析 ................................................. 21 結(jié)論 ...................................................................... 18 參考文獻 .................................................................. 19 4 致謝 ...................................................................... 20 附錄 1..................................................................... 21 附錄 2.....................................