【作者】 张黎；

【导师】 张国平；

【作者基本信息】 华中师范大学 ， 电路与系统， 2012， 硕士

【摘要】 随着射频技术的发展,射频识别(RFID)系统以其可靠性高、存储量大、环境适应性强、识别速度快等突出优势逐步取代传统的识别系统,成为当今门禁系统应用中的主流。近年来,高校扩招、人员混杂、教室资源紧缺。为了便于人员的管理和教室资源的合理分配,急需一套高效的多功能教室门禁系统。本文主要针对这套教室门禁系统的读写器(下位机)和PC机(上位机)界面进行了设计。首先根据功能需求分析对读写器进行了软硬件总体设计及模块划分,读写器硬件部分采用51单片机增强系列的STC11F32XE作为主控芯片,射频模块采用性价比较高的MFRC522芯片。软件程序部分重点针对读写器与射频卡的底层通信进行了设计,并以函数形式将这些与卡片的交互操作进行封装,便于用户直接调用或二次开发。接着再依次对读写器主控及电源模块、射频收发模块、串口通信模块、按键及液晶显示模块、继电器及蜂鸣器模块等几大模块分别进行详细设计,其中包括芯片选型、电路设计、程序设计等方面。并依据实际制板过程中出现的一些问题,讨论了一些制板布线的注意事项。最后是PC机界面的设计与实现。在建立人员信息数据库之后,通过VB6.0集成开发环境完成界面的设计,并采用串口通信的方式与读写器进行数据交换,便于教师和管理人员对学生信息进行查询、修改等操作。该系统设计开发的完成,为教室资源的有效管理提供了便捷,并为校园一卡通的实现奠定了基础。更多还原

【Abstract】 With the rapid development of radio frequency technology, the radio frequency identification (RFID) system with its high reliability, large storage, environment adaptable and fast recognition gradually replace traditional identification systems, to be the mainstream in applications of entrance guard system. We need a set of effective multi-functiong classroom entrance guard system urgently because of the university population increased, personnel hybrid and the shortage of classroom resource in recent years. Use this system can provide convenience for personnel management and allocate classroom reasonably.The article mainly aims at the design for the entrance guard system of the classroom and on the overall design of the hardware and software about the RFID reader at first. It uses STC11F32XE of the51CPU series as main control chip and the ratio of high MFRC522chip as the main chip of radio frequency module. Software part focuses on the realization of the bottom of the RFID communication driver, and based on this, encapsulate the operation of the card into functions which can be transferred by the customers conveniently. Next, specify the modules of the master control, RF read/write, power, serial port, key, liquid crystal display, relay and buzzer in turn. Because there have been some problems in the board making process, so add some description on the attention of board making and wire arrangement. In the end of the article is the PC interface design and implementation. The interface design on PC completed through VB6.0. The data exchanged between PC and RFID reader by serial interface communication. The design of interface is convenient for teachers and staff members to inquire students’ information. The achievment of the system design and development provides convenient for classroom resource management, and lays the foundation for the realization of campus card.更多还原