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毕业论文-智能密码门禁系统设计
49页1、青岛理工大学琴岛学院毕业论文(设计)摘 要智能密码门禁系统是21世纪生活中常用到的智能门禁系统之一,常用于小区门、家庭房门、防盗门、密码箱等等。智能密码门禁系统克服了一般的机械式密码锁容易损坏、保护能力差的短处。特别是采用微处理器系统装置的智能密码门禁系统, 除了一般的密码锁功能,还植入人机界面智能管理系统, 这样可以使该系统具有更高的保障性、简易性和可靠性。该设计主要采用使C语言语序编写STC89C52单片机程序,硬件系统由4*4矩阵键盘、单片机最小系统、 LCD显示器和蜂鸣器报警装置组成。该智能密码门禁系统是由本人自定义一个 6 位数的密码, 将门上锁。如果想开锁,必须在按“ 开锁 ”按键后,输入和自己设定的同样的密码时,门锁打开,密码输入错误就会自动报警,若三次密码输入错误,会提示三声。为了确保方便和永久的密码更改,该系统采用的AT24C04芯片以便即使在电源故障环境下其内部的密码数据可以维持而不会丢失的。关键词:智能密码门禁系统,单片机;矩阵键盘;lcd显示器;报警IIAbstractIntelligent password access control system is o
2、ne of 21st century life are commonly used in the intelligent access control system, used for residential doors, home doors, security doors, password boxes, and so on. Intelligent password access control system to overcome a common mechanical lock easy to damage, protect the ability of weaknesses. Especially in a microprocessor system of intelligent password access control system, in addition to the standard password lock function, intelligent management system of embedded man-machine interface,
3、so you can make the system more affordable, simple and reliable. The design mainly uses the c language word order to write STC89C52 program, hardware keyboard, single-chip microcomputer system by 4*4 matrix, LCD display and buzzer alarm device. The intelligent password under my custom access control system is a 6-digit password, locking the door. If you want to unlock, you must put in come button, and enter the same password and set, lock open, automatic password entry errors will alarm, if the
4、password was incorrectly entered three times, the numeric keypad is automatically unlocked cannot be used. In order to ensure easy and permanent password changes, the system uses the AT24C04 chips so that even after a power failure under its internal password data can be retained and will not be lost。Key words: intelligent password access control system, MCU; matrix keyboard LCD monitor alarm 目 录摘 要IAbstractII1 绪论11.1本设计的研究背景与研究目的11.2国内外研究现状22智能密码门禁系统的总体设计方案32.1方案论证32.2方案比较以及可行性53智能密码门禁系统硬件电路的设计
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