智能防盗系统设计

青岛理工大学毕业设计I摘要本文设计的家庭智能化中的防盗报警系统。智能化防盗报警系统集防盗功能于一体，可全天候自动检测盗警，当确定警情时自动通过电话报警。传感器采用热释电红外传感器，对盗情进行检测，当有人闯入时，微波探测器检测到盗情，然后向单片机发出中断申请，单片机控制电话拨号电路，模拟摘机，向相关部门发出语音求救信号。本系统以单片机89C51为核心，配以各种功能模块，来满足人们日常生活中的安全需求，本系统采用了热释电红外传感器，它的制作简单、成本低，安装比较方便，而且防盗性能比较稳定，抗干扰力强、灵敏度高，这种防盗器安装隐蔽，不易被发觉。同时它的信号经过单片机系统处理后方便和PC机通信，便于多用户统一管理。本设计包括硬件和软件设计两个部分。硬件部分包括红外探测电路、LED控制电路、声光报警电路及单片机控制电路等。自动检测功能由红外探测电路实现，当有盗贼穿过此装置时，红外传感器立即将检测到的信号经过信号处理后传送给主机电路，由主机来判断信号并驱动电路报警。报警功能由扬声器、蜂鸣器等发声装置实现，同时通过RS-485通信报警给小区警卫。本设计通过红外传感器探测人体红外线信号，从而达到报警的功能，满足了人们日常生活对防盗报警功能的需要。关键词：家庭智能防盗报警系统；自动报警；热释电红外传感器；单片机青岛理工大学毕业设计IIABSTRACTThispaperintroducestheburglaralarmsystem.Intelligentanti-theftalarmsystemsetanti-theftfunctioninone,canautomaticallydetectthetheftofthealarmclock,whendeterminingthealarmautomaticallybytelephonealarm.Sensorusingthermalpyroelectricinfraredsensor,thethiefconditionweredetected,whensomeonebrokeinandmicrowavedetectortopiratesofthesituation,thensenttotheinterruptionSCMapplications,MCUcontroltelephonedialingcircuit,analogoffhook,automaticallydial110andplayprerecordedgoodrecordings.Thissystemusing89C51single-chipmicrocomputerasthecorewithwithvariousfunctionmodulestomeetthesecurityneedsofpeopleindailylife,thesystemusesthepyroelectricinfraredsensor,themanufactureissimple,lowcost,installationismoreconvenient,andtheanti-theftperformanceisrelativelystable,stronganti-interferenceability,highsensitivity,theanti-theftdeviceconcealedinstallation,noteasytobefound.Atthesametimeitssignalthroughthesingle-chipmicrocomputersystemtofacilitatetheprocessingandPCcommunication,tofacilitatetheunifiedmanagementofmultiuser.Thisdesignincludestwopartsofhardwareandsoftwaredesign.Thehardwarepartincludesinfrareddetectioncircuit,LEDcontrolcircuit,soundlightalarmcircuitandsinglechipmicrocomputercontrolcircuit.Theautomaticdetectionfunctionisrealizedbytheinfrareddetectioncircuit,whenathiefpassesthroughthedevice,theinfraredsensorcanimmediatelydetectthesignalpassingthroughthesignal.Andsenttothehostcircuitbythehosttodeterminethesignaldrivingcircuitandalarm.Alarmfunctionbythespeaker,buzzerandothersounddevices,andthroughtheRS-485communicationalarmtothedistrictsecurity.Thisdesignthroughtheinfraredsensortodetecttheinfraredsignalofhumanbody,soastoachievethealarmfunction,tomeettheneedsofpeople'sdailylifeforanti-theftalarmfunction.KEYWORDS:smarthomeburglaralarmsystem;automaticalarm;pyroelectric青岛理工大学毕业设计IIIinfraredsensor;singlechipmicrocomputer青岛理工大学毕业设计IV目录摘要.......................................................................................................................IABSTRACT................................................................................................................II第一章绪论........................................................................................................11.1设计的背景及目的................................................................................11.2设计任务与要求....................................................................................1第二章基本元件介绍..........................................................................................32.1热释电红外传感器简单介绍................................................................32.1.2PIR的原理特性.........................................................................32.2AT89C51单片机简单概述......................................................................42.2.1AT89C51单片机的结构...............................................................42.2.2AT89C51管脚说明.......................................................................5第三章系统方案设计..........................................................................................93.1设计方案的比较及确定.........................................................................93.2人体检测模块设计.................................................................................9人体检测模块要求系统具有对人体检测与声光报警功能。实现这一功能首先要求系统能够进行人体检测，判断房间里有没有人。............................93.3热释电红外传感器控制电路芯片选择...............................................10第四章硬件设计................................................................................................124.1系统的总体方案设计结构及其特点和功能.......................................12图4.1系统总体组成框图............................................................................124.2单片机最小系统...................................................................................124.3低频带通放大电路...............................................................................134.4电压比较整形电路...............................................................................154.4.1双限电压比较器的工作原理....................................................154.5声音报警电路.......................................................................................164.6灯光警示电路.......................................................................................17青岛理工大学毕业设计V4.7状态显示电路.......................................................................................174.8供电电源电路.......................................................................................18第五章系统软件设计....................................................................