电子密码锁 课程设计说明书

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课程设计(论文)说明书

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院（系）：信息与通信学院

专业：电子信息工程

学生姓名：

学号：

指导教师：

职称：

2011 年12 月6 日

摘要

在我们的日常生活中，门锁扮演着一个重要的角色。无论是在住宅还是办公室中，门锁保卫着我们的人身和相关隐私的安全。随着社会的发展，人们对锁的要求也越来越高，除了安全性之外，更要求钥匙的便携性和使用方便。传统的机械锁却有着明显的缺点，门锁易遭专业工具破坏，钥匙易丢失和被复制等等。在这样的背景下，电子密码锁应运而生，弥补了机械锁的缺陷，也满足了人们的高要求。

对于电子密码锁，其具有安全性高、成本低、功耗低、易操作等优点，带防盗报警的电子密码锁更是有逐渐取代机械防盗锁的趋势。基于以上思路，并从经济实用的角度出发，本设计使用AT89C51实现一基于单片机的电子密码锁的设计，结合外围的键盘输入、LCD显示、报警、开锁、GSM模块等。其具有以下功能特点：具有友好的显示界面，可以提供丰富的提示信息；具有时间显示功能，掉电后密码不丢失的特性；在输错3次密码的情况下，会锁定键盘和发出声音报警，还可以扩展GSM短信报警功能，通知远程用户；具备密码找回功能，当用户忘记自己所设定的密码时，可以根据密码锁所发过来的短信信息，将其输入进密码锁中，若经过确认是正确答案，便可设定新密码和问题的答案。

关键词：单片机；液晶显示；键盘；电子密码锁；GSM

Abstract

In our daily life,the door lock playing an important role to protect us.Whaterever in

residential or office,the door lock defends our security and related personal privacy.With the development of the society, people has higher requirement for the lock.In addition to the security, people require the keys have portability and the convenience of use.The traditional mechanical lock has obvious disadvantages, door lock is easy damaged by professional tools, and the key is easily lose and copied, and so on.In this background, electronic lock came into being,It makes up the defects of the mechanical lock, also meet the high demands of the people.

For electronic coded lock, it has the advantages of high safety, low cost, low power consumption, easy operation, etc.The electronic lock with anti-theft alarm but also has a tendency to gradually replace the mechanical anti-theft lock.Based on the above ideas, and from the perspective of economic and practical,This design uses AT89C51 implement a microcontroller-based design of electronic locks.It combined with the external keyboard, LCD display, alarm, unlock and GSM circuit modules.Its function has the following characteristics:It has friendly display interface and can provide rich prompt message.It has the function of display the current time,and wouldn’t lost the stored information when power is off.In case of inputting the wrong password 3 times, it would lock the keyboard and sound the alarm.It also can extend the GSM SMS alarm function, and inform the remote user.On the other hand,the design has password recover function.When the user forgot the password,he can according the SMS which send by the electronic lock,and input the information into the electronic lock.If the information is correct after the confirmation,you can set a new password or the new answer to the question.

Key words：Single Chip Microcomputer；LCD Display；Keyboard；Elcetronic Coded Lock；GSM

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