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1、电子门禁系统的设计摘要随着高科技的蓬勃发展,智能化管理已经走进了人们的社会生活。电子门禁系统作为一项先进的高科技防范和管理手段,已广泛应用于科研、工业、博物馆、酒店、商场、医疗监护、银行、监狱等行业。特别是由于其本身具有的隐蔽性、及时性,使得在许多领域的应用越来越广泛。所以,设计稳定性高、保密性强和易于扩展的较通用型门禁考勤系统具有重要的实际意义。在整个系统的设计过程中,作者首先参考了国内外同类产品的设计方法,然后结合实际,给出了设计方案,采用具有丰富多片内外设的LPC2368ARM为微控制器,选用ZLG5
2、22S/LT读卡模块为读卡器(使用Mifare卡),外加小晶格OCM12864-9液晶显示器显示日期时间和刷卡信息,并采用HUIGANG继电器作为门锁开关,同时有门状态指示灯。系统通过RS-485总线与上位机进行通信。该系统具有按用户与时间权限刷卡开门和记录功能、添加用户功能、设置时间权限和考勤时间段,还有同上位机时间同步和手动校对时间的功能,并能将记录信息通过SD卡导出。该电子门禁系统具有实际应用中的单门门禁考勤系统的主要功能,并具有稳定性、可靠性,保密性强和人机界面友好的优点。关键词:ARM微控制器,读
3、卡模块,RS-485,LCD,SD卡ITHEDESIGNOFELECTRONICACCESSCONTROLSYSTEMSABSTRACTWiththeboomingofhightechnology,intelligentmanagementhasenteredpeople'ssociallife.Electronicaccesscontrolsystems,asanadvancedhigh-techmeanswhichusedforpreventionandmanagement,hasbeenwidelyu
4、sedinscientificresearch,industry,museums,hotels,shoppingmalls,medicalcare,banks,prisons,etc.Especiallyforitscharactersofconcealmentandtimeliness,thedomainofitsapplicationshasbecomingmoreandmorewidely.Therefore,herehasimportantpracticalsignificancetodesignh
5、ighstability,highconfidentialityandstrongexpansionofmoreuniversalaccesstimeandattendancesystems.Throughoutthesystem’sdesignprocess,Iatfirstconsultdomesticandinternationalsimilarproducts’designmethods,then,connectedwithreality,bringforwardthedesignmethods,a
6、doptLPC2368ARMwhichhasrich-chipperipheralsasmicrocontrollers,ZLG522S/LTcardreader(usingMifarecard),withasmalllatticeOCM12864-9liquidcrystaldisplayfortheshowingofthetimeanduserinformation,usingHUIGANGasrelayswitchlocks,atthesametimesupplywithstatusindicator
7、s.ByusingRS-485bus,theSystemcommunicatewiththePC.Thesystemcouldindentifycard,thenopenthedoorandrecordfuctionsaccordingtothetimeanduser’sinformation,alsocanadduserfeatures,settimelimitsofauthorityandattendancetime,andsyncIIwiththePCtimeandtimechecksmanually
8、functions,andwillderivedtherecordinformationthroughtheSDcardfunction.Theelectronicaccesscontrolsystemshasthemainfunctionsofpracticalapplicationsintheone-dooraccesscontrolsystem,alsowithstabilityandreliable,st