基于单片机的电子密码锁设计_毕业设计论文.doc

本科生毕业论文 基于单片机的电子密码锁设计 摘要：锁，是指加在门、箱子、抽屉等物体上的封缄器，要用专用的钥匙才能打开。自古以来锁都是人们财产安全乃至生命安全的一种重要保障。伴随着人类历史的发展和人们对自身财产安全和人生安全的重视，各种各样的多功能的锁具也相继出现，人们使用的锁具也由传统的机械式锁逐渐发展为安全性能更好，功能更多的电子密码锁。 在现代社会，电子密码锁已是一个被大家所熟识的名词。相信很多人的小区大门上的锁都用的是电子密码锁。本文中将要介绍的电子密码锁是一种通过判断密码输入是否正确来控制电路或是芯片的工作状态，进而控制锁的打开和闭合，从而完成开锁、闭锁任务的电子锁装置。 本设计是基于AT89C51单片机为控制核心的密码锁设计方案。在本次基于单片机的电子密码锁设计中，将采用AT89C51单片机作为控制核心，配合相应的电路和软件程序，实现密码的输入和修改、信息的显示、键盘的锁定、系统报警、开锁和闭锁等功能。在设计中，利用识别密码是否正确来开锁或报警，通过串行存储器AT24C02来实现密码的修改和存储。 本文设计的密码锁具有安全性高、功耗低、操作简单等优点。 关键词:单片机；密码锁；电子锁；矩阵键盘；掉电存储 The Design Of Electronic Code Lock Based On Single Chip Microcomputer Abstract：As sealed device, the lock added to such objects like door, box, drawer etc, can be opened with specified key. Since the ancient time, lock is a kind of security, guaranteeing people’s property safety even life safety. With the development of human history and more attention paid to property safety and life safety, various multi-functional locks can be seen in the world. Traditional mechanical locks people use in life are gradually replaced by electronic combination lock characterized with better safety performance and more functions. In the modern society, electronic combination lock is a noun familiar to everyone. Usually, the door of community is equipped with electronic combination lock. This paper will introduce an electronic combination lock. This lock controls the electric circuits and the performance of chips by identifying password. Thus, the openness and closeness of the lock can be controlled, and the task of electronic lock device can be completed. This design is about combination lock, based on the AT89C51 single-chip microcomputer as the core of controlling goals. This design in which the AT89C51 single-chip microcomputer as the core of the controlling goals cooperated with relevant circuits and software programs can achieve such functions like password input and modification, information display, keyboard locking, warning system, and the openness and closeness of the