基于单片机的数字密码锁.doc

电子与信息工程学院 本 科 毕 业 论 文 论文题目 基于单片机的数字密码锁控制设计 学生姓名 李 飞 学 号 083522037 专 业 电气工程及其自动化 班 级 083521 指导教师 黄 烜 2012年5月 摘 要 随着我们生活水平的提高，电子数字密码锁慢慢取代了普通的机械锁，普通的机械锁在安全系数上没有电子密码锁好，普通的机械锁其机构非常的简单，从而使安全性能得不到保障，而电子密码锁使我们对安全防盗更有信心了，并且电子密码锁还有不用钥匙、无锁孔、无机械传动、不易损坏、不磨损等优点，很多用户出门都想简单出门，电子密码锁能满足他们的需求。本次设计的系统由单片机系统、矩阵键盘、显示电路和报警提示系统组成，系统能完成开锁、密码保护、密码正确与否的提示。单片机是采用的美国Atmel公司的单片机AT89C52；矩阵键盘采用4×4矩阵键盘；显示电路主要是采用液晶显示，具有设计简单、工作电压低、响应速度快、价格低廉等特点；报警系统采用的是LED指示灯。 此次设计采用C语言作为主片控制程序，经证实此次设计方法合理、简单易行、成本低、安全实用等特点。 关 键 词：单片机；电子密码锁；矩阵键盘 ABSTRACT With the improvement of our living standards, the electronic digital lock slowly replaces the ordinary mechanical lock, the electronic password lock is better than the ordinary mechanical lock on the safety factor, the institution of ordinary mechanical lock is very simple, so that it can not guarantee the safety, and electronic lock makes us more confidence on safety, and the electronic lock has an advantage that without a key, keyhole, mechanical transmission, which is difficult to damage, wearing, and can not easily be deciphered, Many users want to go out simple, the electronic lock can meet their needs. The system consists of MCU system, matrix keyboard, the showing of circuit and alarm system components. System can unlock the lock, password-protected and the showing of password whether it is correct or not. The MCU adopts the United States Atmels MCU AT89C52; keyboard adopts 4 × 4 matrix keyboard; the showing of circuit is the LCD, which is a simple design, has the characteristics of low operating voltage, fast response, low cost; the alarm system uses a LED indicator. The design uses the C language as the main chips control procedures, which is proved that the design of rational design method is simple, of low cost, safe and practical. KEY WORDS: MCU; Electronic lock; Matrix keyboard 目 录 1 绪论 1 1.1 电子密码锁简介 1 1.2 电子密码锁功能要求 1 2 总体