摘要门禁系统是属于智能建筑自动化系统中的一种基于安全的系统，它属于现代化安全管理系统。在现代化发展越来越快的今天，建筑物内的一些大型规划区、人员出入口、贵重物品的库房、设备控制中心、电梯口等重要部门的通道口都需要加强安全保密防护措施，基于以上原因，这使智能门禁的研究成为当今的一个热门的课题。本次设计的控制核心是STC89C52，设计基于单片机的智能门禁系统的研究，本次设计从硬件结构和软件结构两个方面进行设计的。硬件部分包括八个电路模块，分别是电源电路、STM32F103C8T6单片机核心电路、拨动开关选择电路、按键电路、LCD1602液晶显示电路、蜂鸣器报警电路、光敏电阻检测光照强度电路、LED灯电路、红外检测电路。在软件设计中，运用keil编写单片机程序，来完成相应的功能。该系统设计具有结构简单小巧、可读数据直观、功能多样化、设计成本低等优点，拥有非常好的应用前景。关键词：单片机；红外感应；电源电路；液晶电路；智能门禁系统AbstractAccesscontrolsystemisakindofautomationsysteminintelligentbuildingsecuritysystembasedon,itbelongstothemodernsafetymanagementsystem.Withtherapiddevelopmentofmodernizationandtoday,somelargeplanningareawithinthebuilding,staffentrance,valuablesstorage,equipmentcontrolcenter,elevatorandotherimportantsectorsofthechannelmouththeneedtostrengthensecuritysafetyprotectionmeasures,basedontheabovereasons,theresearchofintelligentaccesscontrolhasbecomeahottopicnowadays.ThecontrolcoreofthedesignoftheSTC89C52,researchanddesignofintelligentaccesscontrolsystembasedonMCU,thedesignfromthetwoaspectsofthestructureofhardwareandsoftware.Thehardwarepartincludeseightmodules,namelythepowersupplycircuit,STM32F103C8T6microcontrollercorecircuit,aswitchcircuit,keycircuit,liquidcrystalLCD1602displaycircuit,buzzeralarmcircuit,aphotosensitiveresistancedetectionlightintensitycircuit,LEDlampcircuit,infrareddetectioncircuit.Insoftwaredesign,usingkeilMCUprogramming,tocompletethecorrespondingfunctionsofthesystemdesign.Theutilitymodelhastheadvantagesofsimplestructure,smallsize,readabledata,intuitivefunction,diversifiedfunctions,lowdesigncost,andthelike,andhasaverygoodapplicationprospectKeywords:SCM;infraredinduction;powersupplycircuit;liquidcrystalcircuit;intelligentaccesscontrolsystem目录1绪论................................................41.1课题的提出及意义..................................41.2课题的研究背景和现状..................................41.3研究的内容............................................52.系统方案论证........................................52.1方案设计..............................................52.1.1单片机最小系统介绍...................................................................................52.1.2单片机的方案选择.......................................................................................82.1.3振荡、时钟电路部分介绍.........................................................................92.1.4复位电路部分介绍.....................................................................................102.1.5系统功能.......................................................................................................102.1.6AVR单片机..................................................................................................112.1.7FPGA...............................................122.1.8STM32F103C8T6.........................................................................................122.1.9主控制芯片的确定..........................................................................
