分立式超高频RFID读写器设计

发布时间：2018-01-22 15:26

本文关键词： 射频识别 UHF RFID 读写器分立元件 FPG　出处：《郑州大学》2014年硕士论文　论文类型：学位论文

【摘要】：射频识别技术是近年兴起的采用非接触方式通信的，通过天线耦合信号的一种自动识别技术。该技术利用射频信号的空间耦合特性，并通过所传递的信息达到识别目的，从而实现无接触信息传递。从基本原理来说，在低频段，射频识别技术是基于变压器耦合模型的（初级与次级之间的能量传递及信号传递），在高频段，射频识别技术是基于雷达探测目标的空间耦合模型（雷达发射电磁波信号，碰到目标后携带目标信息返回雷达接收机）。 UHF频段RFID系统识别距离远、读写速度快、卡片成本低、标签尺寸小等很多优点，适合未来停车场管理、物资物流、供应链领域的应用，从而可以为未来实现"物联网"工程提供了一种可能的方式。因此，UHF超高频RFID系统的发展成为当今RFID系统发展的一个重点。本文所设计的分立式高频UHF读写器，是基于EPC Gen2和ISO18000-6C协议标准实现。读写器通过发送射频能量，同时对回波进行检测，实现对非接触标签的读写操作。其中，，由无线标签返回给读写器的信息发送方式采用FM0编解码的通信格式实现。超高频RFID识别技术是一个蓬勃发展的，一个新的技术应用，它不仅借助于微波技术和电磁学理论，还包含通信原理知识以及半导体集成电路技术，是一个综合多学科的技术。因此，对UHF RFID技术的认识和应用研究具有深远的理论意义。目前在我国，UHF射频识别技术还正在发展阶段，尤其是在UHF频段的读写器技术上，我们国家还没有形成真正的核心技术。但是，无源RFID技术在未来物联网技术中的地位可能非常重要，可是，我们的研究水平与国外的水平差距很大。在仔细研究UHF超高频射频识别技术的基本原理、相关标准，发展历程、发展现状的基础上，本文做了以下工作： 1．介绍了UHF射频识别技术的相关知识； 2．描述了项目的开发流程，完成UHF RFID读写器系统方案； 3．详细介绍了分立UHF无源RFID读写器的组成； 4．完成了相关读写器的原理图设计以及PCB设计； 5.描述了读写器的软件架构和工作原理。
[Abstract]:Radio frequency identification (RFID) technology is a kind of automatic identification technology which uses non-contact communication and coupled signals by antenna in recent years. This technology utilizes the spatial coupling characteristics of radio frequency signals. And through the transmission of information to achieve the purpose of identification, so as to achieve contactless information transmission. From the basic principle, in the low frequency band. Radio Frequency Identification (RFID) technology is based on transformer coupling models (primary and secondary energy transfer and signal transfer) at high frequencies. Radio frequency identification (RFID) technology is based on the spatial coupling model of radar detection target (radar transmits electromagnetic wave signal and carries the target information back to the radar receiver after coming into contact with the target. UHF band RFID system has many advantages, such as long recognition distance, fast reading and writing speed, low card cost, small label size and so on. It is suitable for the future application of parking lot management, material logistics and supply chain. Therefore, the development of UHF UHF UHF RFID system has become an important point in the development of RFID system. The discrete high frequency UHF reader designed in this paper is based on the standard of EPC Gen2 and ISO18000-6C protocol. The reader transmits RF energy. At the same time, the echo is detected to read and write the non-contact tag, in which the information sent back by the wireless tag to the reader is implemented in the FM0 codec communication format. UHF RFID recognition technology is a booming, a new technology application, not only with the help of microwave technology and electromagnetics theory, but also includes the knowledge of communication principle and semiconductor integrated circuit technology. Therefore, the understanding and application of UHF RFID technology has profound theoretical significance. At present in our country UHF RFID technology is still in the development stage, especially in the UHF band reader technology, our country has not formed a real core technology. Passive RFID technology may play an important role in the future Internet of things technology, but our research level is far from that of foreign countries. On the basis of studying the basic principle, related standards, development course and current situation of UHF UHF RFID technology, this paper has done the following work: 1. The related knowledge of UHF RFID technology is introduced. 2. The development process of the project is described, and the system scheme of UHF RFID reader is completed. 3. The composition of discrete UHF passive RFID reader is introduced in detail. 4. The schematic design and PCB design of the related reader are completed. 5. The software architecture and working principle of the reader are described.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP391.44

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