目 录内 容 摘 要.............................................................................................................I第 1 章 选题依据....................................................................................21.1 前言..........................................................................................21.2 防盗报警系统在国内外的发展.....................................................21.3 防盗报警器的发展前景与趋势.....................................................31.4 设计任务与要求.........................................................................3第 2 章 系统方案设计.............................................................................52.1 系统总体设计思路......................................................................52.2 系统方案设计.............................................................................52.3 传感器简介................................................................................62.3.1 热释电红外传感器简介......................................................62.3.2 热释电红外传感器电路图...................................................72.3.3 被动式热释电红外探头的工作原理及特性...........................82.4 MQ2 烟雾传感器简介.................................................................82.5 51 系列单片机的内部组成........................................................122.4.1 STC89C52 单片机的内部组成..........................................132.4.2 STC89C52 单片机引脚及功能..........................................142.6 SIM900A 短信模块简介...........................................................152.6.1 GSM 模块接口设计..........................................................18第 3 章 硬件电路设计...........................................................................203.1 电源电路设计...........................................................................203.2 红外探测信号输入电路................................................................
