基于at89c51單片機(jī)倒車(chē)防撞警報(bào)系統(tǒng)設(shè)計(jì)畢業(yè)論文(已修改)
2025-07-04 22:46 本頁(yè)面
【正文】 畢業(yè)設(shè)計(jì)說(shuō)明書(shū)（論文）中文摘要基于單片機(jī)倒車(chē)防撞雷達(dá)的設(shè)計(jì)研究摘要隨著我國(guó)經(jīng)濟(jì)飛速發(fā)展，越來(lái)越多的人擁有了自己的汽車(chē)，同時(shí)由泊車(chē)和倒車(chē)所引發(fā)的事故也越來(lái)越多。這些事故常常給駕駛員帶來(lái)許多麻煩，因此，有助于駕駛員泊車(chē)和倒車(chē)的倒車(chē)?yán)走_(dá)應(yīng)運(yùn)而生。倒車(chē)?yán)走_(dá)，是汽車(chē)泊車(chē)安全輔助裝置，能以聲音或者更為直觀的顯示告知駕駛員周?chē)系K物的情況。本文介紹了一種利用超聲波測(cè)距原理研究的高性價(jià)比倒車(chē)?yán)走_(dá)，它可以提醒駕駛員進(jìn)入警戒區(qū)域，同時(shí)進(jìn)行三級(jí)聲光報(bào)警。無(wú)須占用司機(jī)的視覺(jué)資源，使司機(jī)可以把全部注意力用于觀察車(chē)前及車(chē)旁的路況。超聲發(fā)射部分由89C51單片機(jī)產(chǎn)生40kHz的信號(hào)，通過(guò)CD4069驅(qū)動(dòng)發(fā)射探頭；系統(tǒng)接收部分由接收探頭拾取反射回來(lái)的微弱信號(hào)，當(dāng)接收電路接收到反射信號(hào)就中斷89C51計(jì)數(shù)器停止計(jì)數(shù)，從而得到超聲波從發(fā)射到接收信號(hào)的時(shí)間差。關(guān)鍵詞：倒車(chē)?yán)走_(dá)、超聲波、單片機(jī)Based on monolithic integrated circuit backdraft anticollision radar design research修改對(duì)應(yīng)的英文文摘AbstractAlong with our country economy rapid development, more and more many people had own automobile, simultaneously by parks the accident which initiates with the backdraft more and more to be also many. These accidents frequently bring many troubles to the pilot, therefore, is helpful in the pilot parks with the backdraft backdraft radar arises at the historic moment.The backdraft radar, is the automobile parks the safe auxiliary unit, can or a more directviewing demonstration informs around the pilot by the sound the obstacle situation, the puzzle which relieved the pilot to have parked with start vehicles when all around visits causes, and helped the pilot to clean the field of vision dead angle and the line of sight fuzzy flaw. This article introduced one kind of use ultrasonic ranging principle research the high performancetoprice ratio backdraft radar, it may remind the pilot to enter the zone of security, simultaneously carries on three levels of acousto畢業(yè)設(shè)計(jì)說(shuō)明書(shū)(論文)外文摘要optics to report to the police. Does not need to take driver39。s visual resources, enables the driver to be possible to use in the plete attention observing in front of nearby the vehicle and the vehicle state of roads. The supersonic launch part produces the 40kHz signal by the 89C51 monolithic integrated circuit, Through CD4069 actuation launch probe head。 The system receive part the weak signal which reflects by the receive probe head collection, When the accepting circuit receives the reflection signal to interrupt the 89C51 counter stop counting, thus obtains the ultrasonic wave from to launch to the receive signal time difference.Keywords :Reversing radar, Ultrasonic, SCM目錄1 引言.....................................................................1 倒車(chē)?yán)走_(dá)研究的背景及意義 ........................................................................................................1 國(guó)內(nèi)外倒車(chē)?yán)走_(dá)的發(fā)展現(xiàn)狀 ...........................................2 雷達(dá)的發(fā)展 .........................................................22 超聲波倒車(chē)?yán)走_(dá)的工作原理 ................................................3 超聲波 .............................................................3 超聲波發(fā)生器 .......................................................4 超聲波測(cè)距原理 .....................................................4 超聲波測(cè)距誤差分析 .................................................6 溫度誤差 .......................................................6 時(shí)間誤差 .......................................................62．5 影響超聲波探測(cè)的因素 ..............................................7 如何提醒車(chē)主 .......................................................93 系統(tǒng)設(shè)計(jì) ................................................................9 倒車(chē)?yán)走_(dá)的工作原理圖 ................................................9 系統(tǒng)硬件電路原理圖 .................................................114 系統(tǒng)硬件電路介紹 .......................................................11 AT89C51 單片機(jī) ......................................................11 電源部分 ...........................................................14 放大電路 ...........................................................17 音頻解碼電路分析 ...................................................18 LM567 芯片介紹 ..................................................19 譯碼電路工作原理分析 ...........................................20 LM567 在使用要注意以下幾個(gè)方面 ..................................21 聲光報(bào)警電路 .......................................................215 系統(tǒng)軟件設(shè)計(jì) ...........................................................22 計(jì)算超聲波傳播時(shí)間 ..................................................22 超聲波發(fā)生子程序 ....................................................23 超聲波接收中斷程序 ......................
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