【正文】 8051 單片機(jī) ： 8051 單片機(jī)最早由 Intel 公司推出，其后，多家公司購(gòu)買了8051 的內(nèi)核，使得以 8051 為內(nèi)核的 MCU 系列單片機(jī)在世界上產(chǎn)量最大，應(yīng)用也最廣泛，有人推測(cè) 8051 可能最終形成事實(shí)上的標(biāo)準(zhǔn) MCU 芯片。 （ 2） Motorola 單片機(jī) ： Motorola 是世界上最大的單片機(jī)廠商。它有寫(xiě)時(shí)間片和讀時(shí)間片兩種。 智能溫控風(fēng)扇的設(shè)計(jì) 9 3 主要原件的介紹 系統(tǒng)主要器件包括 DS18B20 溫度傳感器、 AT89C52 單片機(jī)、四位 LED 共陰數(shù)碼管、風(fēng)扇步進(jìn)電機(jī)。在控制電機(jī)的轉(zhuǎn)速時(shí)，占空比越大，轉(zhuǎn)速就越快，若全為高電平，占空比為 100%時(shí)，轉(zhuǎn)速達(dá)到最大。溫度傳感器采用熱敏電阻或熱電偶等，溫度信號(hào)轉(zhuǎn)為電信號(hào)并放大，由集成運(yùn)放組成的比較電路判決控制風(fēng)扇轉(zhuǎn)速，當(dāng)高于或低于某值時(shí)將風(fēng)扇切換到相應(yīng)檔位。并且使用壽命長(zhǎng)，適用范圍廣，安裝極其容易。智能電風(fēng)扇的設(shè)計(jì) 具有重要的現(xiàn)實(shí)意義。 關(guān)鍵詞 AT89C52/溫度傳感器 /直流電機(jī) /模擬風(fēng)扇 智能溫控風(fēng)扇的設(shè)計(jì) III Esign of intelligent temperature control fan ABSTRACT Based detection and singlechip control technology, the design of a smart temperature control fan speed. Explains smart temperature control fan speed control works, hardware design, software implementation process. System is simple, stable, low cost, has a certain energysaving effect. Controlled by the microcontroller to achieve a fan of our main functions: When you press the key to open the system initialize the default set temperature is 25 degrees, if the outside temperature is above the set temperature for fan operation, if the outside temperature is high below the set temperature in the wind does not turn the page, displaying the outside temperature. You can set the desired temperature, and also shows the set temperature, press the plus or minus key to exit the setting mode. Automatic fan control, so fans of the home appliances bee more intelligent. Unable to overe the ordinary fan speed automatically adjusted according to outside temperature difficult. Smart fan design has important practical significance. KEY WORDS AT89C52, temperature sensor, . electric machine， Simulation of fan. 智能溫控風(fēng)扇的設(shè)計(jì) 目 錄 中文摘要 .......................................................................................................Ⅰ 英文摘要 .......................................................................................................Ⅱ 1 緒論 ......................................................................................................3 引言 ...............................................................................................3 發(fā)展現(xiàn)狀與應(yīng)用領(lǐng)域 ....................................................................3 2 整體方案的設(shè)計(jì) ...................................................................................5 系統(tǒng)整體設(shè)計(jì) ................................................................................5 方案論證 .......................................................................................5 溫度 傳感器的選擇方案 ................................................................5 控制核心的選擇 ............................................................................6 顯示電路的選擇 ............................................................................7 調(diào)速方式的選擇 ............................................................................7 控制執(zhí)行部件的選擇 ....................................................................8 3 主要原件的介紹 ...................................................................................9 溫度傳感器 ....................................................................................9 溫度傳感器的種類和選擇 ........................................................................... 9 DS18B20 的工作原理及其單片機(jī)的接口電路 .......................................... 9 單片機(jī) ......................................................................................... 11 單片機(jī)的種類及選擇 ................................................................................. 11 AT89C52 單片機(jī)簡(jiǎn)介 ............................................................................... 13 AT89C52 的性能特點(diǎn)和芯片引腳圖 .......................................................... 15 直流電機(jī) ..................................................................................... 16 4 硬件設(shè)計(jì) ............................................................................................. 19 開(kāi)關(guān)復(fù)位電路 .............................................................................. 19 數(shù)碼管顯示電路 .......................................................................... 19 溫度采集電路 .............................................................................. 20 風(fēng)扇電機(jī)驅(qū)動(dòng)與調(diào)速電路 .......................................................... 21 5 軟件設(shè)計(jì) ............................................................................................. 23 6 系統(tǒng)調(diào)試 ............................................................................................. 25 系統(tǒng)存在的不足及展望 .............................................................. 25 調(diào)試過(guò)程中遇到的故障及 解決方法 ........................................... 25 結(jié)束語(yǔ) ...................................................................................................... 26 致 謝 ...................................................................................................... 27 智能溫控風(fēng)扇的設(shè)計(jì) 參考文獻(xiàn) .................................................................................................. 28 附 錄 1：電路總圖 ................................................................................ 29 附 錄 2：實(shí)物圖 .................................................................................... 30 附 錄 3：源程序 .................................................................................... 31 附 錄 4：溫控風(fēng)扇清單 ........................................................................ 35 智能溫控風(fēng)扇的設(shè)計(jì) 3 1 緒論 引言 生活中，我們經(jīng)常會(huì)使用一些與溫度有關(guān)的設(shè)備。 智能溫控風(fēng)扇的設(shè)計(jì) 5 2 整體方案的設(shè)計(jì) 系統(tǒng)整體設(shè)計(jì) 本設(shè)計(jì)的整體思路是：利用溫度傳感器 DS18B20 檢測(cè)環(huán)境溫度并直接輸出數(shù)字溫度信號(hào)給單片機(jī) AT89C52 進(jìn)行處理，在 LED 數(shù)碼管上顯示當(dāng)前環(huán)境溫度值以及預(yù)設(shè)溫度