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1、边界防范报警器设计摘要本文设计的边界防范报警器是基于DTMF（双音双频信号）传输、作为电话的附属物而设计的家庭远程报警系统。以单片机AT89C5K双音调发生器TCM5087.串行存储器AT24C02及光偶PC817为核心，通过电话线路自动拨号报警的智能电话报警器。单片机在正常情况下处于等待状态，光偶PC817不工作，从而电话处于挂机状态。当探头检测有小偷进入时，产生中断信号给单片机，延时10mS后开始执行中断程序，启动拨号电路，送中断信号给单片机，单片机输出高电平，TCM5087的16脚输出高电平，
2、T2立刻进入导通状态，经T2后再由DO〜D4转变极性后送到电话线两端，PC817的8脚从高电平跳为低电平，T1导通，继电器闭合，则此时程控交换机认为电话处于摘机状态。同时单片机从串行存储器AT24C02屮读出号码自动拨号，也可以切换到声光报警状态。关键词单片机；报警器；电话ThewarnmachineofboundarybeonguaryAbstractTheboundarybeonguardofthistextdesignreporttothepoliceamachineisthefamilylo
3、ngrangeoftheadjunctbutdesignthatdeliverandBeatelephoneaccordingtotheDTMF(doublethesounddual-bandsignal)toreporttothepolicesystem.WiththelistslicethemachineAT89C51,doubletoneoccuiTencemachineTCM5087,stringsavingmachineinlineAT24C02andlightaccidentallyPC
4、S17forcore,passthetelephonecircuitanautostirnumbertoreporttothepoliceoftheintelligencetelephonereporttothepoliceamachine.Thelistslicethemachinebeplacedintowaitforappearanceunderthenormalcircumstance,lightaccidentallyPC817notwork,thusthetelephonebeplace
5、dintohangmachineappearance.Whilestretchingforwardanexaminationtothereisburglartointo,thecreationbreakoffsignaltogivelistslicemachine,10mSwhilepostponeempressthebeginningperformancebreakoffprocedure,thestartstirthenumberelectriccircuit,sendinginterrupti
6、onsignaltogivelistslicemachine,listslicemachineoutputhighelectricityeven,the16feetoftheTCM5087outputhighelectricityeven,theT2entertoleadanappearanceimmediately,afterT2againfromDO〜D4transporttothetelephonelinebothendsaftercommutatetheempressconnectbyavo
7、idingapoleanti-ly,8feetofthePC817fromhighelectricityevenjumpforlowelectricityeven,theT1lead,shuttingtomatchaftertheelectricappliances,thedistancecontrolcommutationmachinetothinkatelephonetobeplacedintotakeoffthemachineappearanceatthistime.Inthemeantime
8、listslicethemachinereadanumberanautostirnumberfromthestringthelinesavinglythemachineAT24C02,Alsocanchanging-overvoiceandlightwarmmodle.KeywordDoubleDTMFwithmanysound;thetelephonereporttothepoliceamachine;thetelephone摘要目第第录31章绪论52章边界防范报警
