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1、.基于单片机门禁系统的设计学号:B11040926姓名:宁志杰日期:2014.12.31..基于单片机的门禁系统的设计摘要门禁系统采用89C52单片机作为控制核心,外围加蜂鸣器控制电路、开门指示灯电路、电控锁控制电路以及LCD液晶显示电路等。门禁系统主要由CPU、工作指示电路、振荡电路、蜂鸣器电路、门控锁电路、矩阵键盘、读卡模块、显示模块等组成。该门禁系统采用射频卡完成刷卡进门,按刷卡出门等功能。其工作原理为:当刷卡时,蜂鸣器响一下,如卡权限获得允许,显示模块显示卡号,同时继电器动作将门锁打开,指示灯点亮,延时一段时间后继电器再次动作将门锁锁闭,指示灯熄灭。当按下出门按
2、钮时,继电器动作将门锁打开,指示灯点亮,延时一段时间后继电器再次动作将门锁锁闭,指示灯熄灭。当输入初始密码时,若输入正确,继电器动作将门锁打开,指示灯点亮,延时一段时间后继电器再次动作将门锁锁闭。此外,程序中还增加了射频卡权限判断的功能,当遇到合法卡时显示卡号,门锁打开,延时10s自动关闭,当遇到非法卡时不显示卡号门锁不开。本系统设计简单、性能优良,具有一定的实用性。关键词:门禁,射频卡,电控锁,液晶显示,单片机控制..AccessControlSystemDesignABSTRACTEntranceguardsystemuses89C52singlechipmicro
3、computerascontrolcoreandperipheryaddabuzzercontrolcircuit,openthedoorindicatorlightcircuit,controlcircuitandcontrollockLCDdisplaycircuit,etc.EntranceguardsystemmainlybytheCPUandresetcircuit,thepowerindicativecircuit,workinstructionscircuit,oscillatingcircuit,abuzzercircuit,doorcontrolcir
4、cuit,gooutandlockbuttonreadingcardmodule,displaymodule.Theentranceguardsystemusesrfcardcompletechargetakethedoor,accordingtocredittogoout,andotherfunctions.Itsworkingprincipleis:whencredit,abuzzerrang,suchascardtobeallowedtoaccess,displaymoduledisplaycardnumber,andatthesametimerelayactio
5、nwillopenthedoorlock,indicatorlight,delayafterperiodoftimerelayactionwillagainonlydoorlock,lightsgoout.Whenthepressoutbutton,therelayactionwillopenthedoorlock,indicatorlight,delayafterperiodoftimerelayactionwillagainonlydoorlock,lightsgoout.Whentheinputpassword,ifyouinputthecorrect,relay
6、actionwillopenthedoorlock,indicatorlight,delayafterperiodoftimerelayactionwilllockdoorlockagain.Inaddition,theprogramwillalsoincreasetherfcardauthorityjudgmentfunction,whenfacinglegalcardshowedthecardnumber,dooropen,delay10sautomaticallyshutoff,whenmeetingtheillegalCARDSdon'tshowthecardn
7、umberlocksdon'topen.Thesystemissimpleindesign,goodperformance,andhaspracticalvalue!KEYWORDS:AccessControl, RadioFrequency Card,ElectronicallyControlledLock, LCD,MCU..目 录基于单片机的门禁系统的设计I前言1第1章概述21.1系统方案的比较21.1.1选题论证21.1.2方案选择21.1.3CPU的选择31.1.4射频卡的选择41.1.5液晶显示的选择4第2章硬件电路的设计52