毕业设计论文—基于单片机的家庭防盗报警系统设计分析

基于单片机的家庭防盗报警系统设计

摘要

防盗报警系统的设计是为满足现代住宅防盗的需要所设计的家庭式电子防盗系统。

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和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

The Design of Family Anti-theft

Alarm Systems Based on SCM

Abstract

exosipThe design of anti-theft alarm system is for the family of electronic security systems designed to meet the needs of modern residential burglar.

Anti-theft alarm system uses 伞齿轮传动the combination sensor which consists of Pyroelectric infrared sensor and Vibration transducer for displacement,the fixing of this alarm is covert, after has been processed by SCM, the signal of alarm communicates with PC, which半轴螺栓 is convenient for uniform management. Anti-theft alarm design includes hardware part and software part.The hardware part of the design includes detection circuit receiving the signal, the LED control circuit to control light-emitting and driving the implementation of the implementation of the alarm circuit to 新型大棚骨架alarm.The software part of the design includes programs like interrupt,timing to achieve the role of acousto-optic alar

m,etc.押花材料The functions of the design is simple and pratical.When people go out,we can set the alarm system in the conditon of protection ,the detector begins to work. 循环冷却水处理Pyroelectric infrared sensor will detect the action when people break in ,and the infrared probe setted in the observing point will convert the infrared radiation and the displacement of the vibration from the human body into the electrical signal.The signal is sent to the threshold switch through amplifier circuit and comparison circuit,then open the threshold valves and send out the TTL level,then send it to the AT89C51 SCM via the latch,and make the performing alarm circuit sounding via the processing oprations of the SCM .

KEYWORDS SCM;infrared sensor;signal receiving;alarm circuit

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