汽车防盗报警器的设计毕业设计.doc

PAGE 19 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 introduces the design of automobile anti-theft alarm system of this graduation design.The function of the system is realized by detecting car alarm,when there is no vibration, keep alert,avibration alarm.This system mainlyincludes circuit of three parts:the vibration detection circuit,single-chip microcomputer control circuit,alarm circuit.The main function of the vibration detection circuit is: testing whether the automobile vibration, when there is novibration, the output remains low, when the vibration detection circuit, digital pulse signal, is sent to the MCU control circuit. MCU control circuit is the corepart of the whole system, it receives the signal detection circuit came, and through the procedures to handle and control alarm circuit, when it receives islow, keep the alarm circuit closed state,when it receives the pulse signal whenopening the alarm circuit. The alarm circuit is mainly to achieve sound and lightalarm two. This paper first explains to the design options, then introduces thecharacteristics, the function of the chip and other devices for example AT89S52 vibration sensor. Then it describes the?composition and structure of the system. Then analyzed the working principle of the circuit and the whole system and the specific work process.Finally,the debugging method and the improved scheme of the circuit, so as to ensure the whole system work more effectively and perform well in the design. KEY WORDS:the vibration test electrical circuit the control