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摘要摘要射频识别（RFID）技术是近几年随着无线电技术和大规模集成电路的普及应用而出现的一项先进的自动识别和数据采集技术。它的最大优势就是非接触性。可以无需人工干预完成识别工作。本文研究了电感耦合RFID系统工作原理，讨论了射频识别系统的组成及各个部分包括天线、阅读器和电子标签的作用。设计了射频识别系统的总体方案和各个部分的硬件电路。进行了射频识别系统的电路调试，进行了系统识别距离的测量和系统识别正确率的测量。结果表明，本文设计的基于电感耦合的RFID系统可以正确工作。该论文对今后进行射频识别系统开发的工作有一定的参考意义。关键词：自动识别射频识别电子标签阅读器摘要ABSTRACTRadioFrequencyIdentification(RFID)technologyisanadvancedautomaticidentificationanddatacollectiontechnology,appearedwiththeradiotechnologyandthepopularizationofthelargescaleintegratedcircuitinrecentyears.Thebiggestadvantageofthistechnologyisthatthepropertyofnon-contact.Theidentificationworkcanbedonewithouthumanintervention.TheprincipleoftheinductivelycoupledRFIDsystemswerestudiedinthisarticle,andtherolesofthecomponentsoftheRFIDsystems,includingtheantennas,readersandelectronictagswerediscussed.TheoverallprogramoftheRFIDsystemandthevariouspartsofthehardwareweredesigned.ThecircuitoftheRFidentificationsystemwasdebugged,thedistanceandaccuracyoftheidentificationsystemweremeasured.TheresultsshowthatthedesignofinductivecouplinginRFID-basedsystemcanworkproperly.Thisstudyhassomereferencevalueonthedevelopmentworkoftheradiofrequencyidentificationsystemsinthefuture.Keywords:automaticidentificationRFIDelectronictagreaderunit目录i目录第一章绪论.....................................................................................................................11.1常见的自动识别技术........................................................................................11.2射频识别技术的概述........................................................................................31.3研究内容............................................................................................................5第二章射频识别技术工作原理..................................................................................72.1电感耦合RFID系统工作原理.........................................................................72.2射频识别系统的组成........................................................................................92.2.1天线.......................................................................................................102.2.2阅读器...................................................................................................102.2.3电子标签...............................................................................................12第三章射频识别系统总体设计..................................................................................153.1总体方案选择..................................................................................................153.2调制方案选择..................................................................................................163.3系统工作频率...................................................................................................163.4天线选择..........................................................................................................173.5系统的整体结构..............................................................................................17第四章系统实现...........................................................................................................194.1主要芯片介绍..................................................................................................194.2耦合线圈谐振计算..........................................................................................214.3电子标签设计..................................................................................................224.3.1电源模块...............................................................................................224.3.2编码电路...............................................................................................244.3.3调制电路...............................................................................................254.4阅读器的设计..................................................................................................264.4.1发射模块的设计...................................................................................264.4.2解调电路...............................................................................................294.4.3解码电路的设计...................................................................................31第五章射频识别系统的调试和测试..........................................................................355.1线圈耦合调试..................................................................................................355.2系统识别距离的测量......................................................................................35ii目录5.3系统识别正确率的测量..................................................................................35第六章总结...................................................................................................................37致谢.................................................................................................................................39参考文献.........................................................................................................................41第一章绪论1第一章绪论本章首先对一些常见的自动识别技术做简单的介绍，然后详细介绍射频识别技术。1.1常见的自动识别技术自动识别技术是将数据自动采集和识读，并且自动输入计算机的重要方法和手段。近二三十年来，自动识别技术在全球范围内得到了迅猛的发展。自动识别技术