摘要随着社会科技和人们的生活水平的提高，如何实现家庭防盗这一问题也变的尤其的突出，传统的机械锁由于其构造的简单，被撬的事件屡见不鲜，电子锁由于其保密性高，使用灵活性好，安全系数高，受到了广大用户的亲呢。红外电子密码锁是一种以高强度密码序列为基础，在单片机上实现的密码开关。它以红外光作为信息媒体，从而实现了遥控，也可以配备一个结构简单的接触式通讯接口，坚固并且防损。该锁具有使用方便、操作简单、价格低廉等特点，给人们的生活带来了极大方便。特别适用于那些正常人体不宜接近的特殊场合，比如高辐射区、高传染区等。本设计以单片机AT89S52作为密码锁监控装置的检测和控制核心，分为主机和从机，实现钥匙信息在主机上的初步认证注册、密码信息的加密、红外传输、钥匙丢失报废等功能。根据51单片机之间的串行通信原理，利用红外来传输，这便于对密码信息的随机加密和保护。而且采用红外遥控相对于机械锁和键盘输入的电子密码锁具有较高的优势。如红外线发射装置采用红外发光二极管，遥控发射器易于小型化且价格低廉；采用数字信号编码和二次调制方式，不仅可以实现多路信息的控制，增加遥控功能，提高信号传输的抗干扰性，减少错误动作，而且功率消耗低；红外线不会向室外泄露，不会产生信号串扰；反应速度快、传输效率高、工作稳定可靠等。所以红外线遥控是目前使用最广泛的一种通信和遥控手段。软件设计采用自上而下的模块化设计思想，以使系统朝着分布式、小型化方向发展，增强系统的可扩展性和运行的稳定性。测试结果表明，本系统各项功能已达到本设计的所有要求。关键词红外线遥控电子密码锁单片机目录1绪论········································································································11.1引言······································································································11.2红外通信基本原理···················································································21.3设计要求································································································31.3.1基本要求······························································································31.3.2说明····································································································32系统设计···································································································32.1通信接口组成及工作原理···········································································42.2红外钥匙（从机）组成及工作原理·······························································42.3红外遥控门锁（主机）组成及工作原理·························································52.2.3红外钥匙（从机）和红外遥控门锁（主机）之间的通讯协议········...
