【正文】 摘 要 溫控風(fēng)扇在現(xiàn)代社會(huì)中的生產(chǎn)以及人們的日常生活中都有廣泛的應(yīng)用，如工業(yè)生產(chǎn)中大型機(jī)械散熱系統(tǒng)中的風(fēng)扇、現(xiàn)在筆記本電腦上的廣泛應(yīng)用的智能 CPU 風(fēng)扇等。本文設(shè)計(jì)了基于單片機(jī)的溫控風(fēng)扇系統(tǒng)，采用單片機(jī)作為控制器，利用溫度傳感器DS18B20 作為溫度采集元件，并根據(jù)采集到的溫度，通過一個(gè)達(dá)林頓反向驅(qū)動(dòng)器ULN2803 驅(qū)動(dòng)風(fēng)扇電機(jī)。根據(jù)檢測(cè)到的溫度與系統(tǒng)設(shè)定的溫度的比較實(shí)現(xiàn)風(fēng)扇電機(jī)的自動(dòng)啟動(dòng)和停止，并能根溫度的變化自動(dòng)改變風(fēng)扇電機(jī)的轉(zhuǎn)速，同時(shí)用 LED 八段數(shù)碼管顯示檢測(cè)到的溫度與設(shè)定的溫度。 該系統(tǒng)改變了傳統(tǒng)的 手動(dòng)控制電風(fēng)扇的起停，實(shí)現(xiàn)了 溫控電風(fēng)扇全自動(dòng)調(diào)速控制，較好地把智能控制技術(shù)應(yīng)用到了家用電器控制系統(tǒng)中，用人體周圍的環(huán)境溫度對(duì)風(fēng)扇進(jìn)行溫控。 實(shí) 踐證明該調(diào)速器可靠性高、控制準(zhǔn)確、節(jié)能節(jié)電、成本低 ；利用軟件技術(shù)實(shí)現(xiàn)電風(fēng)扇風(fēng)速調(diào)級(jí)和開停機(jī)控制，增強(qiáng)了抗干擾性。該設(shè)計(jì)具有較高的應(yīng)用價(jià)值，適用于依靠電風(fēng)扇散熱來降溫的任一控制系統(tǒng)中。 關(guān)鍵詞 ： 單片機(jī)、 DS18B智能、風(fēng) 扇 ABSTRACT Temperature control fan is widely used in the modern society of production and People39。s Daily life， Such as industrial production machinery cooling system of medium fan、 the intelligence CPU fan is widely used in the Notebook puter etc． This article introduces the design of the temperature control system based on single chip puter fan， Using single chip microputer as the controller， Use temperature sensor DS18B20 as temperature gathering ponents And according to the collected temperature， the fan motor driven by a Darlington Reverse drive ULN2803． According to the temperature detected by the temperature and system settings of the realization of the motor starts and stops， And can automatically change the fan motor speed according to temperature changes At the same time， the Eight period of digital tube LED display of the detected temperature and set temperature， The system has changed the traditional manual control from the fan`s stopped， In which intelligent control technology is applied to home appliances control system． Practice prove that the controlling of this electric fan governor is high reliabilitystabilit，accurate and energysaving， low cost； Kind of software technology is used to achieve transferlevel fan speed controlling and open parking controlling， which enhances the antiinterference． This design has higher value ,could be applied in any control system in which electric fan is used to lower the temperature． Key words ： Singlechip microputer、 DS18B Temperature control、 fan 目 錄 第一章 概述 ........................................................................................................................ 1 選題背景及意義 ........................................................................................................... 1 研究目標(biāo)和內(nèi)容 ........................................................................................................... 1 第二章 方案論證 ................................................................................................................ 2 本設(shè)計(jì)的整體思路 ....................................................................................................... 2 溫度傳感器的選擇 ....................................................................................................... 2 控制核心的選擇 ........................................................................................................... 2 溫度顯示器件的選擇 ................................................................................................... 3 鍵盤電路的選擇 ........................................................................................................... 3 調(diào)速方式的選擇 ........................................................................................................... 4 第三章 主要單元模塊的介紹 ............................................................................................ 5 DS18B20 單線數(shù)字溫度傳感器簡介 ....................................................................... 5 DS18B20 的功能及使用說明 ......................................................................... 5 DS18B20 寄存器的存儲(chǔ)器及格式 ................................................................. 6 DS18B20 使用注意事項(xiàng) ................................................................................. 6 達(dá)林頓反向驅(qū)動(dòng)器 ULN2803 簡介 ............................................................................. 7 LED 數(shù)碼管簡介 ....................................................................................................... 7 單片機(jī)簡介 ................................................................................................................... 8 第四章 總體硬件設(shè)計(jì) ...................................................................................................... 11 系統(tǒng)結(jié)構(gòu)框圖 ............................................................................................................. 11 數(shù)字溫度傳感器模塊設(shè)計(jì) ......................................................................................... 11 鍵盤輸入模塊 ............................................................................................................. 12 溫度顯示與控制模塊 ................................................................................................. 13 風(fēng)扇電機(jī)驅(qū)動(dòng)與調(diào)速電路 ......................................................................................... 14 開關(guān)復(fù)位與晶振電路 ................................................................................................. 15 第五章 軟件設(shè)計(jì) .............................................................................................................. 17 程序設(shè)置 ..................................................................................................................... 17 用 Keil C51 編寫程序 ................................................................................................ 17 第六章 用 Proteus 進(jìn)行仿真 ........................................................................................... 19 Proteus 簡介 ............................................................................................................. 19 本設(shè)計(jì)基于 Proteus 的仿真 ....................................................................................... 19 結(jié) 論 .................................................................................................................................. 24 致 謝 .......................................................................................................