毕业设计论文 基于单片机的电子密码锁设计 毕业设计_精品.doc

毕业设计论文 基于单片机的电子密码锁设计 毕业设计 基于单片机的电子密码锁设计 摘 要 在日常的生活和工作中 住宅与部门的安全防范单位的文件档案财务报表以及一些个人资料的保存多以加锁的办法来解决若使用传统的机械式钥匙开锁人们常需携带多把钥匙 使用极不方便 且钥匙丢失后安全性即大打折扣在安全技术防范领域具有防盗报警功能的电子密码锁逐渐代替了传统的机械式密码锁电子密码锁具有安全性高成本低功耗低易操作等优点 本文从经济实用的角度出发采用美国Atmel公司的单片机AT89S51作为主控芯片与数据存储器单元结合外围的矩阵键盘输入LCD液晶显示报警开锁等用C语言编写的主控芯片控制程序与EEPROM AT24C02读写程序相结合并用Keil软件进行编译设计了一款可以多次更改密码具有报警功能的电子密码控制系统 这种密码锁的电路设计具有防试探按键输入智能控制上锁开锁报警修改密码等多种功能密码长度可变保密性强灵活性高应用日益广泛 关键词 密码锁 单片机 报警 LCD显示 Design of Electric Password Lock Based on MCU ABSTRACT In the daily life and the work the way to the houses and departments safe guard units document file the financial reporting as well as some individual material preservation almost need many locks If we use tradition mechanical key to open the people often must carry many keys but it is not extremely convenient If the key lost the security will decline greatly In the safety work guard domain the lock with security warning function electronic combination have replaced the traditional mechanical combination lock gradually the electronic combination lock have the highly security the lowly cost the lowly power wastage easy to operate and so on merits This article is based on the economical and practical point of view uses the United States Atmel Corporation AT89S51 microcontroller as a master chip and the data memory unit it combines with the external matrix keyboard input LCD digital display alarm unlock and so on circuits dominates by the C programming language chip EEPROM of the control procedures and carries on the translation with Keil software the password can be changed many times the electronic the password control also has the alarming function This password lock circuit design has anti-test button input intelligent control lock unlock alarm and change the password multiple functions Password length can be changed great security and high flexible than others it is widely used Key Words Password lock MCU Alarm LCD Display 目 录 摘要 第一章 绪论 11电子密码