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1、洛阳理工学院毕业设计(论文)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,
2、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45洛阳理工学院毕业设计(论文)AccessControlSystemDesignABSTRACTEntranceguardsystemuses89C52singlechipmicrocomputerascontrolcoreandperipherya
3、ddabuzzercontrolcircuit,openthedoorindicatorlightcircuit,controlcircuitandcontrollockLCDdisplaycircuit,etc.EntranceguardsystemmainlybytheCPUandresetcircuit,thepowerindicativecircuit,workinstructionscircuit,oscillatingcircuit,abuzzercircuit,doorcontrolcircuit,gooutandlockbuttonreadingcardmodule,d
4、isplaymodule.Theentranceguardsystemusesrfcardcompletechargetakethedoor,accordingtocredittogoout,andotherfunctions.Itsworkingprincipleis:whencredit,abuzzerrang,suchascardtobeallowedtoaccess,displaymoduledisplaycardnumber,andatthesametimerelayactionwillopenthedoorlock,indicatorlight,delayafterperi
5、odoftimerelayactionwillagainonlydoorlock,lightsgoout.Whenthepressoutbutton,therelayactionwillopenthedoorlock,indicatorlight,delayafterperiodoftimerelayactionwillagainonlydoorlock,lightsgoout.Whentheinputpassword,ifyouinputthecorrect,relayactionwillopenthedoorlock,indicatorlight,delayafterperiodo
6、ftimerelayactionwilllockdoorlockagain.Inaddition,theprogramwillalsoincreasetherfcardauthorityjudgmentfunction,whenfacinglegalcardshowedthecardnumber,dooropen,delay10sautomaticallyshutoff,whenmeetingtheillegalCARDSdon'tshowthecardnumberlocksdon'topen.Thesystemissimpleindesign,goodperformance,andh
7、aspracticalvalue!KEYWORDS:AccessControl, RadioFrequency Card,ElectronicallyControlledLock, LCD,MCU45洛阳理工学院毕业设计(论文)毕业设计(论文)原创性声明和使用授权说明原创性声明本人郑重承诺:所呈交的毕业设计(论文),是我个人在指导教师的指导下进行的研究工作及取得的成果。尽我所知,除文中特别加以标注和致谢的地方外,不包含其他人或组织已经发表或公布