智能门禁系统的设计摘要智能门禁是近年来随着电子产业的发展，尤其是射频卡应用的技术走向成熟而渐渐兴起的。随后，通过密码和射频卡作为许可凭证的门禁进入人们的眼帘，被慢慢熟悉和应用。IC卡内部包含着一个唯一的标签（ID），对它进行授权处理之后便可成为一个特殊的密钥，通过验证之后能够进行相关控制操作，是门禁系统中不可缺少的一个重要组成部分。本设计首先对射频识别（RFID）技术的概念及工作过程、原理进行介绍，随后对设计过程中使用的单片机控制器STC89C52、射频芯片阅读器MFRC522以及液晶显示屏LCD12864进行了叙述。本文从硬件和软件设计两方面进行阐述。通过主控模块搭建电路控制实现MFRC522射频卡读取以及液晶显示是硬件设计的核心；软件部分主要是通过C语言编程来完成相应控制以及各个模块之间的数据通信。关键词：射频识别智能门禁MFRC522STC89C52DesignofintelligentaccesscontrolsystemAbstractWiththedevelopmentoftheelectronicsindustry,particularlyradiocardapplicationstechnology,intelligentaccessgraduallyriseinrecentyears.Subsequently,passwordandIDcardasproofoflicenseaccessintopeople'seyes,isunderstoodandappliedslowlyandfamiliar.ICcardcontainsauniquetag(ID),toauthorizeitafterprocessingcanbecomeaspecialkey,ICcardisanimportantpartinaccesscontrolsystem.Firstly，Thedesignintroducesthetheconceptandtheworkingprocessofradiofrequencyidentification(RFID)technology.Then,weintroducecontrollerSTC89C52andICcardreaderMFRC522andscreenLCD12864.Thisdesignelaboratedfrombothhardwareandsoftware.BuildingcontrolcircuittoreadICcard，displayinginLCDisthecorewithinhardwaredesign;softwarepartmainlythroughtheClanguagetocompleteoperationanddatacommunicationbetweeneverymodules.Keywords:radiofrequencyidentification,Intelligentaccesscontrol,MFRC522,STC89C52目录1绪论...............................................................................................................................................11.1课题研究的背景及意义...................................................................................................11.2课题研究现状...................................................................................................................11.2.1国内研究现状........................................................................................................11.2.2国外研究现状........................................................................................................21.3门禁系统发展趋势...........................................................................................................21.4课题设计任务...................................................................................................................31.5论文结构...........................................................................................................................32射频识别技术的理论知识...........................................................................................................42.1射频识别技术概述...........................................................................................................42.1.1射频识别技术原理................................................................................................42.1.2射频识别系统的基本结构....................................................................................52.2非接触式读卡芯片MFRC522.........................................................................................62.3本章小结...................................................................
