摘要基于多种通信方式的密码锁系统设计摘要：针对传统机械锁的各种缺点和重要部门安全性的要求，提出一种基于红外遥控的密码锁设计方案，通过此方案设计的密码锁电路可以满足安全性要求，也能适应特殊环境的使用需求。本文介绍的一种由8052编程实现的控制电路，具有按键指示，控制开锁，控制报警，遥控开锁等功能。红外遥控密码锁的应用研究主要应用了红外线编码及解码技术，并通过单片机实现密码的设置、修改及识别功能。设计电路主要有红外线编码电路、红外线解码电路和键盘及显示电路组成。具有保密性强，灵活性高，适用范围广，特别适合家庭，车库，工厂等场所。关键词：红外线，密码锁，AT89C51单片机AbstractAbstractEach kind of shortcoming which and Integral part security request locks inview of the traditional machinery proposed that one kind based on infraredremote control's combination lock design proposal,may satisfy the securerequest through this project design's combination lock electric circuit,canalso adapt the special environment use demand.This article introduced that onekind the control circuit which realizes by the 8052 programming,has the pressedkey to instruct,control unblanking,control warning,functions and so onremote control unblanking,the infrared remote control combination lock'sapplied research has mainly applied the infrared code and the decoding technology,and realizes the password establishment,the revision and the recognitionfunction through the monolithic integrated circuit.The designa circuit mainlyby the infrared encode circuit,the infrared decoding unblanking electriccircuit and the keyboard and demonstration electricity the road is composed.Has secret,the flexibility is high,the applicable scope is broad,especiallyqualify family,garage,places and so on factory.Key word infrared monolithic:combination lock:8052II目录目录1.2选题背景及研究的目的与意义…21.2.2研究的目的与意义…31.3红外遥控密码锁国内外的研究现状及存在问题…341.5红外线的基本知识…1.6密码锁的发展趋势与特点……52方案设计…方案一通过区分控制电压来实现多路控制6方案二通过不同频率来控制各路开关.6方案三由脉冲编码来实现多路控制7图2-3编码控制方框图.72.2方案论证…73红外密码锁的总体设计…93.】系统的整体设计…9图3-1遥控发射结构框图…93.1.3红外发射信号的编码..103.1.4接收信号的解码…3.2密码锁的主要功能…4红外密码锁硬件部分…表4-】P3口的第二功能4.芯片的可擦除性…图4-2单片机AT89S51最小系统原理图.图4-3电源电路…4.1.274LS164芯片.图4-674LS164器件图….84.2红外发射与接收装置…184.2.】发射装置…图4-7红外发射电路.4.2.2接收装置图4-8红外接收图4.3各模块器件功能…204.3.】3X4矩阵键盘204.3.274LS164芯片.4.3.3数码管22表2LED显示器的字段码(7段码)