摘 要本论文从硬件和软件两方面对系统进行了详细的设计。介绍了核心芯片的选型，外围电路的连接，芯片与芯片之间的连接电路，程序设计方法和相应的软件。系统电源用7805、7809芯片输出5V、9V电压，通过稳压模块给系统供电。整个设计采纳模块化思想，主机采纳 AT89C51实现控制，由热释电传感器和振动位移传感器对住宅的模拟信号（人体发出的红外信号、引起的振动信号等）进行自动监测，当检测到异常情况 ，产生数字信号输入单片机，单片机根据输入信号，输出给蜂鸣器报警，做出反应处理。复位电路采纳低功耗，四引脚的IMP812监控芯片。系统硬件电路简单、安装方便、操作简单，并且具有成本低的优点，可适用于各种类型的住宅和人群。关键词：传感器； 单片机； 报警系统 ABSTRACTThis paper from both hardware and software on the system carried out a detailed design. It introduced the Selection of the core chip, the external circuit connections, chip and the connection between the circuit chip, program design methods and the corresponding software. 7805,7809 chip system power output by 5 V, 9V voltage regulator module to the system through the power supply. The whole design is modular thinking, host AT89C51 used to achieve control, by the pyroelectric sensor and vibration displacement sensors for residential analog signal (the human issued by the infrared signal from the vibration signals, and so on) for automatic monitoring, When detected abnormal circumstances, producing a digital signal input SCM, the MCU according to the input signal and output to the buzzer alarm, to respond to treatment. Reset circuit using low-power, four-pin IMP812 monitoring chip. System hardware circuit simple, easy to install, simple operation, and has the advantage of low cost, applicable to all types of residential and the crowd.Key words: sensor； MCU； alarm system 毕业设计（论文）原创性声明和使用授权说明原创性声明本人郑重承诺：所呈交的毕业设计（论文），是我个人在指导老师...
