基于单片机实现的智能门禁控制系统毕业论文.doc

智能门禁系统设计 摘 要 智能门禁系统采用AT89S52 单片机作为控制核心，外围加外部电源电路、读卡模块电路、蜂鸣器控制电路、开门指示灯电路、电控锁控制电路以及8位数码管显示电路等。门禁系统主要组成：由CPU、复位电路、电源指示、工作指示、振荡电路、蜂鸣器电路、门控锁电路、出门按钮、读卡模块、显示模块等组成。采用非接触射频卡IC完成刷卡进门，按钮出门功能。门禁系统的工作原理：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，指示灯熄灭。设计中增加了射频卡权限判断，当遇到合法卡时显示卡号，门锁打开，延时10s自动关闭，非法卡不显示卡号门锁不开。非接触卡门禁管理系统集成计算机、机电一体化和非接触式卡技术于一体，通过卡控制门锁的开启，实现了卡和锁之间的“对话”功能，开启了门禁管理的新概念。分体门禁可以根据客户工程需求，门禁控制器最高可控制128门，给管理者提供了安全、迅捷、自动化的管理模式、给使用者带来了极大的方便。本系统设计简单、性能稳定，具有一定的实用性。 关键词：门禁，单片机，射频卡，权限，继电器 INTELLIGENT ACCESS CONTROL SYSTEM ABSTRACT Access control system with AT89S52 microcontroller as control core, peripheral and buzzer control circuit, door led circuit, electronically controlled locking control circuits, as well as 8-bit digital display circuit. Access control system components: by the CPU, reset circuit, power indicates, work instructions, oscillating circuit, buzzer circuit, door locking circuit, go button, the card module, display module, etc. RF card ID to complete the credit card button go out the door. Access control system works: when you swipe your card, buzzer, such as card access permission, display module displays the card number and relay the door open, light is lit, the delay for a period of time after the relay will lock again to action, led is off. When you press the go button, the relay opens the door, light is lit, the delay for a period of time after the relay will lock again to action, led is off. Design increased RF card right judgment, when it comes to legitimate card display card number, the door opens. Non-contact Carmen guard management system integration computer, Mechatronics and contactless card technology, via the card control locks open for cards and lock the dialogue quot; between features, opened a new door access management concepts. Separate access control according to customer requirements, access controller can control up to 128 door, to the Manager provides secure, fas