汽车防盗报警器的设计

摘要

本文介绍了本次毕业设计的课题汽车防盗报警器的设计。整个系统的功能是通过检测来实现汽车防盗，当没有振动时，保持预警状态，有振动时就报警。

本系统主要包括三个部分的电路：振动检测电路、单片机控制电路、报警电路。振动检测电路的主要功能是：检测汽车是否有振动，当没有振动时，输出保持低电平，当有振动时，检测电路产生数字脉冲信号，送到单片机控制电路。单片机控制电路是整个系统的核心部分，它接收检测电路传来的信号，并通过程序来加以处理和控制报警电路，当它接收到的是低电平时，就保持报警电路关闭状态，当它一旦接收到脉冲信号时就开启报警电路。报警电路主要实现声音和光两种报警。

本文首先说明了本次设计所能够采用的方案，接着介绍了芯片的功能及其它器件的特性，例如，AT89S52、振动传感器等。然后描述了该系统的组成及其结构。接下来分析了各个电路及整个系统的工作原理及具体工作过程。最后阐述了调试方法以及电路的改进方案，以确保整个系统更加有效地工作和很好地完成本次设计。

关键词：振动检测电路单片机控制电路报警电路振动传感器

Abstract

This paper presents my task of the graduation design in detail,which is a automotiveburglar alarm. The main function of the whole system is that it pretend the automative fromstealing throught the vibration testing.When there is no vibration it keeps the early warningstats.When there is vibration it give an alarm.

The whole system consists of three part of electrical circuit:the vibration test electricalcircuit, the control electrical circuit of the microcomputer and the the alarm electricalcircuit .The main function of the vibration test electrical circuit is that test whether there isvibration or not.When there is no vibration it output lower level.When there is vibration itoutput a digital pulse signal and send it to the control electrical circuit of the microcomputer.The control electrical circuit of the microcomputer is the core of the whole system.It take overthe signal sending from the vibration test electrical circuit and then deal it with theprogramme and control the alarm electrical circuit.When the signal it take over is the lowerlevel it keeps the alarm electrical circuit off.When the signal is the digital pulse one it turn thealarm electrical circuit on.The alarm electrical circuit consists of the voice alarm electricalcircuit and the light one.

First the thesis explain the project I can take,then it introduce the function of the chip and theother parts of apparatus.For example AT89S52 and the vibration sensor.After that it describethe structure of the system and then it analyse the basic principle of every electrical circuitand the whole one.At last it expound the way of testing and the modified project in order toensure that the whole system works effective and I can finish this design successfully.

KEY WORDS:the vibration test electrical circuit the control electrical circuit of themicrocomputer the alarm electrical circuit the vibration sensor

目录

第一章绪言 (1)

第二章任务设计 (2)

第三章AT89S52单片机 (3)

第四章全向振动传感器 (12)

第五章电路原理及设计过程 (15)

第一节检测电路 (15)

第二节单片机控制电路 (16)

第三节报警电路 (17)

第六章系统调试 (20)

第一节硬件调试 (20)

第二节软件调试 (20)

结束语 (22)

辞 (23)

参考文献 (24)