【正文】 畢業(yè)設(shè)計(jì) I 摘 要 紅外遙控技術(shù)大大提高了勞動(dòng)生產(chǎn)率、降低了成本、減輕了工人勞動(dòng)強(qiáng)度、改善勞動(dòng)條件。而微機(jī)技術(shù)出現(xiàn)，使現(xiàn)代科學(xué)得到了質(zhì)的飛躍，給現(xiàn)代工業(yè)測控領(lǐng)域帶來了一次新的革命。 紅外遙控系統(tǒng)是通過紅外線的精準(zhǔn)定位控制模式來控制被控對象，整個(gè)控制系統(tǒng)主要集合了數(shù)字電路以及模擬電路。硬件電路則包括了紅外發(fā)射電路以及紅外接受電路兩部分。發(fā)射電路主要將紅外信號通過鍵盤輸入、編碼調(diào)制以及紅外發(fā)生器等一系列硬件電路傳輸給接受電路，而接收電路則解調(diào)、解碼等電路來識別所接受的紅外信號。 電風(fēng)扇作為一種老牌的電器，具有價(jià)格 便宜、擺放方便、體積輕巧等特點(diǎn)，占有大部分的市場份額，市場的需求促使了電風(fēng)扇的發(fā)展，精準(zhǔn)的遙控開關(guān)設(shè)計(jì)能夠提高電風(fēng)扇的工作性能，提高舒適性、穩(wěn)定性。 本設(shè)計(jì)以 AT89C51 單片機(jī)作為核心，綜合了單片機(jī)中斷系統(tǒng)、定時(shí)器、計(jì)數(shù)器等功能，結(jié)合紅外光的優(yōu)點(diǎn)設(shè)計(jì)出了一款電風(fēng)扇遙控裝置。 針對不同功能的遙控操作實(shí)現(xiàn)途徑，紅外遙控發(fā)射器通過識別不同的紅外光線頻率來區(qū)別不同功能的操作。紅外 遙控接收器 則經(jīng)過識別紅外線頻率、查表識別具體要操作要求，完成對被控對象的實(shí)時(shí)控制。 關(guān)鍵詞： 紅外遙控 ； 電風(fēng)扇 ； 數(shù)字電路；模擬電路； AT89C51 畢業(yè)設(shè)計(jì) II Abstract Infrared remote control technology greatly improves labor productivity , reduce costs , reduce labor intensity and improve working conditions . The emergence of puter technology , so that modern science has been a qualitative leap to the modern field of industrial measurement and control has brought a new revolution. Infrared remote control is an infrared remote control system to control the use of the controlled object system, the entire system consists of digital and analog circuits posed of two parts . Emitting portion includes a keyboard matrix , coded modulation , LED infrared transmitter 。 receiving portion prises an infrared light emitting LED , demodulation, decoding circuit . As a veteran of electrical fans with cheap, convenient place , lightweight characteristics, occupy most of the market share, market demand led to the development of electric fans , precise remote control switch designed to enhance the fan work performance, improved fort and stability. The design AT89C51 microcontroller as the core , bines the advantages of microcontroller interrupt system , timers, counters and other features, bined with infrared light designed an electric fan remote control device. For remote operation type , the remote transmitter via the transmission frequency of the infrared light to distinguish between the different control operations . Identification of the remote receiver via infrared light receiving frequency control operation is judged to plete the infrared remote control transmitter and receiver process. Key words: Infrared remote control。 fans。 digital circuits。 analog circuits。 AT89C51 畢業(yè)設(shè)計(jì) 目 錄 摘 要 ............................................................................................................................................ I Abstract ..........................................................................................................................................II 第 1 章 緒 論 ............................................................................................................................. 1 家電遙控技術(shù)的研究背景 ............................................................................................. 1 遙控技術(shù)國內(nèi)外研究現(xiàn)狀及發(fā)展趨勢 ......................................................................... 1 紅外通信技術(shù)概述 ......................................................................................................... 3 本文研究的具體內(nèi)容 ..................................................................................................... 3 第 2 章 工作原理及總體設(shè)計(jì) ..................................................................................................... 5 紅外遙控發(fā)射部分 ......................................................................................................... 6 紅外信號接收部分 ......................................................................................................... 6 紅外編碼 ......................................................................................................................... 7 紅外編碼標(biāo)準(zhǔn)設(shè)計(jì) ............................................................................................... 7 二進(jìn)制信號的調(diào)制 ............................................................................................... 8 二進(jìn)制信號的解調(diào) ............................................................................................... 8 二進(jìn)制信號的解碼 ............................................................................................... 9 第 3 章 硬件設(shè)計(jì) ......................................................................................................................... 10 時(shí)鐘電路 ....................................................................................................................... 10 復(fù)位電路 ....................................................................................................................... 10 按鍵及其接口電路 ....................................................................................................... 11 紅外遙控原理及其設(shè)計(jì) ............................................................................................... 12 紅外發(fā)射電路 ............................................................................................................... 13 紅外遙控接收電路 ....................................................................................................... 13 紅外信號接收電路 ............................................................................................. 14 控制部分電路 ..................................................................................................... 14 電源電路 ....................................................................................................................... 16 第 4 章 軟件設(shè)計(jì) ......................................................................................................................... 17 模塊化程序簡介 ......................................................