文档介绍：模拟电子技术课程设计说明书红外线报警器系 、 部: 电信系学生姓名: 陈颖之指导教师: 贾雅琼职称讲师专业: 电气工程及其自动化班级: 1002完成时间: 2012 年 5 月1摘要红外线报警器一般用作防盗报警 , 是一种最常见的报警装置 , 该装置由 直流稳压电源, 红外线发射部分、红外线接收部分、 555 定时器以及蜂鸣器组成 , 可通过发射的红外线被物体阻挡时 ,红外线接受部分无法接收到红外线时产生信号 ,利用 光电开关 特性以及 555 定时器控制蜂鸣器进行报警并控制其报警时长 。关键词 光电开关,直流稳压电源,555 延时芯片ABSTRACTInfrared alarm monly used for anti-theft alarm, is one ofthe mon alarm device, comprising a DC power supply, infraredemission part, infrared receiving portion,555timer and a buzzer, bytransmitting infrared object was blocked, the infrared receivingportion to be receives infrared signal generated by the photoelectricswitch characteristics, as well as 555timer control buzzer alarm andcontrol the alarm timeKey words the photoelectric switch;555timer;buzzer目录21 总体设计方案与要求··································  设计任务的功能要求说明·························  设计课题总体方案介绍及工作原理说明·············42 设计电路及其仿真分析································  设计电路图·····································  设计电路的仿真结果····························· 63 硬件电路各部分电路设计······························  硬件电路图及各模块功能简要介绍·················  PCB 图········································  元器件清单····································· 934 系统的调试及性能分析································  系统的调试·····································  性能分析······································· 105 设计结论及体会······································ 106 参考文献············································ 107 致谢···········································118 附录···········································111 设计课题任务设计一个红外线防盗报警器。要求如果有人进入监视区域,立即报警,报警时长为 30 秒。设计课题总体方案介绍该装置以 直流稳压电源和 555 定时器为核心,采用光电开关作 为发射和接受装置,利用光电开关 的特性和 555 定时器来控制蜂鸣器工作,在光电开关被挡住时输出电平信号来使蜂鸣器报警。系统框图如图  所示。220v 交流电源直流稳压电源光电开关 555  总体方案说明该装置接通电源后, 220V 交流电源经过直流稳压部分的处理之后,变为 5V 左右的报警延时部分的输入电源。当光电开关接通,即没有人经过时,光电开关输出高电平进入 555 延时芯片,555 延时芯片输出低电平到蜂鸣器,蜂鸣器不工作;当光电开关断开,即有人挡住时,光电开关输出低电平进去 555 延时芯片。555 延时芯片输出到蜂鸣器,蜂鸣器延时报警。2 设计电路图设计其原理电路图:图    。5图  :经过变压器