目錄
摘要 2
1 引言 2
1.1 單片機(jī)技術(shù)應(yīng)用現(xiàn)狀 2
1.2 汽車防盜系統(tǒng)發(fā)展 4
1.3 本設(shè)計(jì)的主要工作 7
2 單片機(jī)汽車防盜系統(tǒng)的方案設(shè)計(jì) 7
2.1 系統(tǒng)總體設(shè)計(jì)方案 7
2.2 控制模塊設(shè)計(jì) 8
3 系統(tǒng)硬件設(shè)計(jì) 9
3.1 主控芯片AT89C2051簡(jiǎn)介 9
3.2 超聲波發(fā)射與接受電路設(shè)計(jì) 11
3.2.1 發(fā)射電路 11
3.2.2 555定時(shí)器簡(jiǎn)介 12
3.2.3 接收電路 14
3.2.4 鎖相環(huán)譯碼器LM567簡(jiǎn)介 15
3.3 振動(dòng)檢測(cè)模塊設(shè)計(jì) 16
3.3.1 振動(dòng)檢測(cè)模塊硬件原理 16
3.3.2 CLA-3全向振動(dòng)傳感器簡(jiǎn)介 17
3.4 報(bào)警模塊設(shè)計(jì) 18
3.4.1 光電耦合器簡(jiǎn)介 18
3.4.2 蜂鳴報(bào)警模塊工作原理 19
3.4.3  EX-1智能撥號(hào)報(bào)警模塊簡(jiǎn)介 20
3.5 切斷點(diǎn)火模塊設(shè)計(jì) 24
4 系統(tǒng)軟件設(shè)計(jì) 27
4.1 系統(tǒng)主程序 27
4.2 延時(shí)子程序 28
4.3 中斷處理子程序 28
4.4 振動(dòng)檢測(cè)子程序 29
結(jié)論 32
致謝 32
參考文獻(xiàn)： 32

 
基于單片機(jī)的汽車防盜系統(tǒng)設(shè)計(jì)

摘要：本文介紹一種由AT89C2051實(shí)時(shí)控制及數(shù)據(jù)處理功能、利用超聲波敏感器件作為發(fā)射與接收裝置并依據(jù)多普勒效應(yīng)、振動(dòng)傳感器和自動(dòng)撥號(hào)的智能芯片EX-1制作的汽車防盜報(bào)警系統(tǒng)。使用時(shí)把此系統(tǒng)安裝在汽車駕駛室內(nèi), 當(dāng)有人非法進(jìn)入車內(nèi)時(shí), 報(bào)警系統(tǒng)立即報(bào)警、切斷汽車點(diǎn)火電路且會(huì)撥打預(yù)先存在智能芯片中的號(hào)碼;或未解除防盜功能時(shí)拖動(dòng)車輛或使車輛升離地面等團(tuán)體性偷車時(shí)，振動(dòng)傳感器檢測(cè)并將獲得的信號(hào)送單片機(jī)處理，若達(dá)到報(bào)警限度就蜂鳴報(bào)警、關(guān)閉捕捉中斷、切斷汽車點(diǎn)火電路和撥打報(bào)警電話。經(jīng)過這樣處理,以往防盜系統(tǒng)經(jīng)常出現(xiàn)的誤報(bào)情況會(huì)大大減少。

關(guān)鍵詞：AT89C2051; 超聲波; 多普勒效應(yīng); 振動(dòng)傳感器; 自動(dòng)撥號(hào)

Design of Auto Guard against Theft Based on Chip Microcomputer

Abstract: This paper presents a real-time control by the AT89C2051 and data processing functions, the use of ultrasound as a launch-sensitive devices and receiving devices in accordance with the Doppler effect, vibration sensors and automatic dial-up of the smart chip produced by EX-1 anti-theft vehicle alarm system. Put this system in the control cabin .when somebody comes in the car illegal, the system alarm and cut off the vehicle ignition circuit and will dial a pre-existing number of smart chip. When the car’s function of guarding against theft was not clear, lifting of the vehicle or dragging the car from the ground up and so on behaviors of Groups of  theft car, the vibration sensor will detect  signal and send to Chip Microcomputer.If the signal reached the limit on the alarm,the system will close interrupted of capture and cut off the vehicle ignition circuit and auto- alarm phone call. After such processing, in the past Phenomenon of Error alarm in anti-theft system will greatly reduce.
Key words: AT89C2051;  Ultrasound;  Doppler effect;  vibration sensor;  Auto-dial