3、闯,误入如强化访问会产生误报领域。该体系由单片机AT89C51系列,CPU运转输出电平掌管后,使声光报警电路,蜂鸣器和发光二极管,同时声光报警。该系统能够检测的范围内的人的入侵,安全可比较所确定的范围的情况下被应用。采纳这种方法的防盗报警器和检测成本低,成效好设计,具有广阔的墟市前景。关键字:电源电路,AT89C51单片机,红外线发送,红外线接收,报警电路Ore Plant InfraredAnti-theft DetectionAlarmAbstract:Aspeople paymoreattention to theirown property an
5、alarms; infrareddetector iseasilyaffectedbythetemperature, light andotherenvironmentalfactors which producefalsepositives, andhumanfactors arethemain users ofimproperoperation, carefulnotto triggerthe alarm, straying he has visited, fortified zone will generatefalsepositives. Thi
6、ssystemismainlycomposedof singlechipcomputerofAT89C51series, the CPU programruns afterthe acousto-optic controloutput port levelmakesthe buzzer andlight-emittingdiode alarmcircuit and soundlightalarm. Thesystem candetect into arangeofpeople, canbe comparedtodeterminethescopeofthe
7、 applicationinthesecurity situation. The anti-theftalarmsystemdesignedbythismethod has lowcost anddetection effectisgood, havebroadmarketprospects.Keywords:Thepowersupplycircuit,AT89C51singlechipmicrocomputer,Infraredtransmission,Infraredreceiver,Thealarmcircuit第一章绪论1.1 电路设计背景 电子