基于单片机的电子密码锁的设计毕业论文.doc

毕业论文（设计）题 目： 系部名称： 专业班级： 学生姓名： 学 号： 指导教师： 教师职称： 20年0月摘 要 随着科技的发展,安全已成为人们关注的焦点之一,于是各种安全产品相继问世(如指纹防盗!红外防盗!GPS等)虽然这类产品安全性高,但因其生产成本高,携带安装使用不方便,在一定程度上限制了这类产品的普及和推广 本文介绍的是一种基于单片机智能锁的硬件和软件设计及实现方法这种电路设计具有按键有效提示,输入错误提示,控制开锁电平,控制报警电路,修改密码等多种功能可在意外泄密的情况下随时修改密码4位数密码共一万组不重复组合,必威体育官网网址性强,灵活性高,特别适用于家庭，办公室，学生宿舍及宾馆等公开场所。 本文采用以89c51为核心的主控芯片外接AT24C01掉电存储单元来完成控制功能，设计主要分为硬件和软件两部分，由矩阵键盘，显示电路，报警电路，单片机复位及晶振电路等构成外围硬件电路，软件部分则由控制程序来完成。通过软硬件结合来实现设计功能。 本文通过单片机及外围芯片完成密码锁的上锁及开锁功能，采用的设计思想是由键盘输入的设置密码被存储在固定单元内，然后通过单片机对键盘进行扫描以确认密码是否正确，若密码正确则发出开锁信号，在此用二极管说明开锁信号，若密码不对则发出警报，这样设计的目的极大的提高了产品的安全性。 关键字：89c51，AT24C01掉电存储，矩阵键盘，显示电路，报警电路等。 The design of electronic locks based on microcontroller Abstract With the development of technology, security has become the focus of attention, so a variety of security products have come out (such as fingerprint security! infrared alarm! GPS, etc.) Although these products are safe, but because of its high production costs, Installation is not convenient to carry, to a certain extent, limited the popularity of such products and to promote This paper describes a microcontroller-based intelligent lock hardware and software design and implementation method, this circuit has a key and effective prompt, enter the error Suggest that the control lock level, control and alarm circuits, change passwords, and other functions can be compromised in the case of an accident at any time change your password4-digit password totaling group does not repeat the combination of confidentiality, and high flexibility, in particular, For home, office, student hostels and hotels and other public places In this paper, the core of the main chip 89c51, AT24C01 external storage unit to complete the power-down control, hardware and software design can be divided into two parts, the matrix keyboard, display circuit, alarm circuit, microcontroller reset, and constitute the external crystal circuit Hardware, software part by the control program to