IC卡电表应用研究及设计.doc

IC卡电表的研究与设计 摘 要 随着我国市场经济的发展和金融现代化，现金和各种证件逐渐被各种卡片所取代。IC卡技术是以计算机、通信技术等现代化科学技术为基础发展起来的一项新技术。IC卡是近几年才出现的新型卡片，它保存的信息可靠、安全，可以高达几万次的读写。本文以IC卡预付费电表为例对IC卡在电表中的应用进行了深入的研究。 本文在对传统电表分析的基础上，设计了IC卡电表预付费的控制系统，该系统采用硬件和软件相结合的方法。硬件包括采样电路，存储电路，显示电路，IC卡接口电路和报警电路。并通过汇编语言编程实现IC卡在电表终端预付费、电能计量、数字显示和报警等功能。软件设计是基于硬件设计基础上的程序设计过程，具体包括：主程序，插卡中断子程序，脉冲中断子程序和显示子程序等。 本文所涉及的主要内容有：IC卡基础知识的概述、控制系统硬件的选择、设计及功能分析；软件设计部分主要给出了基本程序流程图和部分具体功能实现的程序以及简要的说明。 关键词 IC卡电表单片机SLE4442 Abstract Along with the development of market economy in our country and finance modernization, cash and many certificates are replaced gradually by some cards. The technology about the IC card is a recently rising technology which based on the computer and communication. The IC card is a new card which appears in recent years that preserves the information is reliable and safe and reach as high as read-write several ten thousand times. This paper takes the prepaid meter as an example to the card of IC in the application thorough study. The article has analysed the traditional meter and designed the pre-payment control system of the IC card meter which combines hardware and software knowledge. Hardware including sampling electric circuit, storage circuit, display circuit, IC card connection electric circuit and alarm circuit. Through the assembly language programming , the article realizes the meter terminal pre-payment, the meter energy measurement, the digital display and the function of alarm. The software design is a process of procedure design that based on the foundation of hardware design, includes: the main procedure, inserts the card interrupt procedure, the pulse interrupt procedure and the display procedure and so on. The main content of this system involves: the basic knowledge of the IC card, the hardware choice of the design control system, system of the hardware primarily to analyze with the function; The software design part has mainly given the procedure basic flow chart and the part concrete function realization procedu