毕业论文（设计）基于AT89C51的防盗报警系统的设计说明书.docVIP

2014届本科生毕业论文 分类号:TP277 题 目： 基于AT89C51的防盗报警系统的设计 作 者 姓 名： 学 号： 学 院： 专 业： 指导教师姓名： 指导教师职称： 2014年5月13日 摘 要 防盗报警系统采用了由热释电红外传感器和振动位移传感器构成的复合式传感器，这种防盗器安装隐蔽，同时它的信号经过单片机系统处理后方便与PC机通信，便于多用户统一管理。防盗报警系统设计包括硬件和软件设计两个部分。硬件部分设计主要包括检测电路接收信号，LED控制电路控制发光及驱动执行报警电路执行报警等。软件部分设计主要包括中断、定时等程序设计来实现声光报警的作用。此设计实现的功能简单而实用。当人员外出时，可把报警系统设置在外出布防状态，探测器工作起来。当有人闯入时，传感器将探测到动作，设置在监测点上的探头将人体辐射的红外光谱和振动的位移变换成电信号。此信号经放大电路、比较电路送至门限开关，打开门限阀门送出TTL电平，然后经锁存器送至AT89C51单片机，又经单片机处理运算后驱动执行报警电路使警号发声。 关键词：单片机； 红外传感器； 信号接收； 报警电路 Abstract Anti-theft alarm system adopted by the pyroelectric infrared sensor and vibration displacement sensor is composed of compound sensor, the alarm installed concealment, while its signal after dealing with the single chip microcomputer system convenient communication with a PC, facilitate unified management among multiple users.Burglar alarm system design including hardware and software design of two parts. Hardware design mainly includes the received signal detection circuit; LED control circuit control shine and drive perform alarm circuit alarm, etc. Software part design mainly includes the interrupt, timing, such as program design to achieve the effect of sound and light alarm. This design to realize the function of simple and practical.When people go out can set the alarm system in the protection state, detector work. When someone broke into, sensors will detect movement, set on the monitoring of the probe will human radiation of infrared spectra and vibration displacement into electrical signals. The signal amplifying circuit, compare circuit, to the threshold switch, open the threshold valves out TTL level, and then by the latch to AT89C51, and after microcontroller processing operation drive execution alarm circuit warning voice.Key words: single chip microcomputer; Infrared sensor; R