毕业设计（论文） 题 目 基于单片机 家庭防盗报警系统 设计 姓 名 学 号 专业班级 指导老师 分 院 完成日期 目 录1 绪论................................................................................................1 1.1 进展概况和设计背景............................................................11.2 本设计概述........................................................................2 2 总体设计方案........................................................... ................3 2.1 方案选择论证....................................................... .............3 2.2 主控芯片单片机选择....................................... .............3 2.2.1 STC89C52 关键性能.................................................42.2.2 STC89C52 引脚结构.................................................52.3 传感器选择..........................................................................6 2.3.1 传感器红外辐射和红外探测原理结构................72.3.2 红外测温原理....................................................................7 2.3.3 热释红外传感器结构.................................................8 2.3.4 菲涅尔透镜..................................................................102.4 热释电红外传感器控制电路芯片选择..........................11 3 系统硬件设计.......................................................................….133.1 低频带通放大电路..............................................................133.2 电压比较整形电路..............................................................143.2.1 双限电压比较器工作原理.......................................143.3 报警电路..............................................................................153.4 灯光警示电路......................................................................163.5 状态显示电路......................................................................173.6 供电电源电路......................................................................173.7 单片机最小系统......
