教学单位 信息工程系学生学号孝感学院信息工程学院本科毕业论文(设计)题 目 基于单片机无线烟雾报警系统设计学生姓名 李 琪专业名称 电子信息科学与技术指导老师 叶建勇老师职称 教 授2008 年 12 月 20 日基于单片机无线烟雾报警系统设计摘要:随着人民大众对因火灾而威胁到自身财产生命安全的日益重视,烟雾报警器运用得越来越广泛,本报警系统采纳无线反馈报警原理,由两大部分组成:第一部分由烟雾检测器(采纳 MQ-2 气敏传感器),单片机(AT89S51),编码器(PT2262)和微型幅度键控(ASK)无线报警发射机组成;第二部分为无线 报 警 接 收 器 , 主 要 有 : 接 收 模 块 , 解 码 器 ( PT2272 ) , 单 片 机(AT89S51),显示模块(液晶 1602)。使用时第一部分安装在储藏室,车库,卧室等;第二部分则安装在小区警务室内。当有烟雾产生时,经过单片机处理和编码后,信号经无线传输由接收模块解调,解码后经过单片机处理,显示模块显示出具体的事发地点发出报警。关键词:单片机;编码器;发射机;接收机;解码器;显示模块;幅度键控The design of Wireless fog alarm system based on MCUAbstract: With the mass of the people pay more attention on fire to threaten the lives and property security, smoke detectors are becoming more and more widespread use, the alarm system using wireless alarm feedback principle on the two major parts: the first part of the smoke detector (MQ-2 using gas sensors), single-chip (AT89S51), encoders (PT2262) and the range of micro-keying (ASK) wireless alarm transmitter components; the second part is the police radio receiver, the main modules are: receiver,decoder (PT2272), single-chip (AT89S51), display module (LCD 1602). The first part is installed in the storage room,garage and bedroom when using, the second part is installed in the interior district police. When the smoke produced , after a single-chip processing and coding, the signal from the wireless receiver module demodulation, decoding then send to single-chip process...