基于单片机的红外线遥控电子密码锁的设计.docVIP

题 目： 基于单片机的红外线遥控电子密码锁的设计 系 别： 信息工程系 专 业： 应用电子技术 学生姓名： 指导教师： 年 月 日 摘 要 本文介绍了一种基于单片机的红外线遥控电子密码锁的设计方案。红外线遥控电子密码锁是通过密码的输入来控制电路或是芯片工作，从而控制电磁锁的闭合，完成开锁、闭锁任务。它是以单片机为核心，通过编程来实现的。 本设计由硬件部分和软件部分组成。硬件部分包括本机开锁电路和红外线遥控开锁电路。本机开锁电路是由键盘、显示器、报警器组成，当没有接收到遥控信号时，由键盘输入密码 Abstract In this paper, there is a SCM based on the infrared remote control E-coded lock design. Infrared remote control E- coded lock is through the password to enter the control circuit or chips work, thus controlling the electromagnetic lock closure, completing the task of unlocking and locking. It is at the core SCM, achieved through programming. The design includes the hardware and software components. Hardware includes local unlock circuit and infrared remote control unlock circuit. Local unlock circuit is composed of the keyboard, monitor, alarm components. When the E- coded lock does not receive signals, it enters a password through the keyboard. Remotely unlock circuit of long-distance control is designed to use SCM’s serial launch, accepted function and the principle of infra-red remote control. The software is used for the preparation of the assembly language in Fu-environment. Password lock has strong confidentiality, high flexibility and a wide scope in this design to meet the security requirements. It can change password timely in the case of leak accident, particularly suitable for families, hotels, private garage, and other places, also able to adapt to the environment of the use of other special needs. Key words: Infrared ray; SCM; Password lock 目 录 引 言 1 1 基本原理介绍 2 1.1 红外线遥控基本原理 2 1.2 采用单片机串行通信原理 3 1.2.1 串行通信基础 3 1.2.2 串行通信中串行I/O和数据的实现 4 1.2.3 串行口的选择 6 2 系统方案选择与设计 7 2.1 单片机型号的选择 7 2.1.1 8031、8051、8751的比较 7 2.1.2 AT89C51、AT89S51的比较 7 2.2 键盘的选择 8 2.2.1 独立式键盘 8 2.2.2 矩阵式键盘 9 2.3 显示方式的选择 10 2.4 采用AT89C51实现红外线遥控方案的分析 11 2.5 总体方案的确定 12 2.5.1 系统构成框图 12 2.5.2 基本功能设计 12 3 硬件电路的设计 14 3.1 本机开锁电路设计 14 3.1.1 本机开锁电路