红外抄表系统设计.docVIP

摘 要 本文介绍了利用红外线实现上位单片机和多个单片机间的无线串行通信的新方法，并基于该方法设计实现了新型无线抄表系统，给出了硬件线路图、通信协议和程序流程图及用MCS51汇编语言编写的部分串行通信程序。 本文首先分析了当前红外抄表技术的国内外发展现状，指出了红外抄表的意义和优点，然后进行了系统的总体设计，详细说明了红外抄表系统硬件电路设计，最后介绍了抄表系统的软件实现和程序流程。 红外抄表机的硬件设计是整个抄表系统的关键所在。抄表机由单片机、电源电路、串行通信电路、显示电路、键盘设置电路、存储器、红外发射接收电路等组成。本设计采用了AT89C51芯片作为抄表机的单片机，它是整个抄表机的中央处理单元；显示模块选用了电表专用液晶显示器SM0823；红外发射电路的发射管采用了TK69931；红外接收电路的接收器则采用了德律风根的TFMS5380接收器。 关键词：This paper describes a new method to realize the master slave mode communication through serial ports between master microchip and other microchips by using infrared. Base on the method a new wireless meter reading system was proposed. Circuit, protocol, flow chart and part source codes of MCS51 are also presented for serial communicating. In this paper, the infrared analysis of the current development of meter-reading at home and abroad, pointing out that the significance of the infrared and the advantages of meter reading, and then the system design, detailed description of the infrared meter reading system hardware circuit design, and finally introduced a copy Table system software processes and procedures. Infrared meter machine hardware designing is the key to the meter reading system. Meter-reading machines from single-chip, power supply circuit, the serial communication circuit, display circuit, a keyboard set up circuit, memory, infrared emission and the composition of the receiving circuit. AT89C51 is the meter-reading machine central processing unit,display module selected special LCD meter SM0823, infrared transmitter launch tube uses TK69931, infrared receiver of the receiver circuit uses the telefunken TFMS5380 receiver. Key words: Infrared, Microchip, Meter reading system, Wireless serial communicating 目 录 1 绪论 1 1.1红外抄表发展现状 1 1.2选题的意义 4 1.3红外抄表的优点及使用效果 5 2 红外抄表系统总体设计 7 2.1红外抄表系统工作原理 7 2.2 红外抄表系统设计方案 9 3 红外抄表系统硬件电路设计 11 3.1 手持抄表机电路设计 11 3.2 分时付费率电度表电路设计 23 3.3 红外线发射电路设计 26 3.4 红外线接收电路设计 29 4 红外抄表系统软件设计 32 4.1 串行通信原理 32 4.2手持抄表机软件设计 35 4.3 分时付费率电度表软件设计 40