论文总字数：15820字

摘 要

随着社会不断的发展进步，人们的安全意识也在不断提高，传统的机械锁存在着较大的局限性，比如结构简单、安全保密性能较差等，已经无法适应当前的环境。因此，一种安全有效而又简便的电子密码锁便因运而生。由于现在电子密码锁发展已经初具规模，可选范围较广，所以本设计选取了其中一种电子锁的设计方法。STC89C52单片机、LCD1602显示器、4×4矩阵键盘和报警系统等构成了该系统，它具备更改密码、错误报警、错误锁定等功能，以及操作人性化、低功耗、高保密性等优点，符合住宅与办公室的用锁要求。本设计将采用proteus模拟仿真软件，该软件为我们提供了丰富的元器件，便于我们设计出合适的硬件方案。另外，本系统兼顾节约成本、功能实用、外形美观等方面。

关键词：STC89C52，电子密码锁，矩阵键盘

Abstract：With the continuous development and progress of society, people"s safety awareness is also rising, the traditional mechanical lock structure is simple, poor safety performance, it has been unable to adapt to the current environment. Therefore, a safe, effective, and convenient electronic lock will result into being. Due to the development of electronic locks has now begun to take shape, a wider range of options, so the design selected one of the electronic lock designs.The system consist of STC89C52 SCM, LCD1602 , 4 × 4 matrix keyboard and alarm systems, it has password changing, false alarms, error locking functions, and user-friendly operation, low power consumption, high security, etc, in line with residential and the office with a lock request. This design will use proteus simulation software, which provides us with a wealth of components, for us to design a suitable hardware solution. In addition, taking into account the cost of the system, functional and practical, beautiful appearance and so on.

Key words :STC89C52 ,electronic password lock ,Matrix keyboard

目 录

1 绪论...........................................................4

1.1 课题背景及意义...............................................4

1.2 电子密码锁的发展趋势.........................................4

1.3 系统功能.....................................................5

2 主要元器件介绍.................................................6

2.1 STC89C52RC单片机.............................................6

2.2 LCD1602液晶显示器............................................7

2.3 自锁开关.....................................................8

2.4 上拉电阻.....................................................8

2.5 三极管.......................................................9

2.6 继电器......................................................10

2.7 轻触按键....................................................11

3 硬件设计......................................................11

3.1 设计思想....................................................11

3.2 开锁机构....................................................12

3.3 矩阵键盘设计电路............................................12

3.4 声音提示电路设计............................................13

3.5 AT24C02掉电存储单元的设计..................................13

4 软件设计......................................................14

4.1 PROTEUS介绍.................................................14

4.2 模块介绍................................................... 14

4.3 系统仿真....................................................18

结论............................................................20

参考文献........................................................21

致谢............................................................22

剩余内容已隐藏，请支付后下载全文，论文总字数：15820字