基于指纹的射频识别标签定位实验平台设计与实现  

Development of Experimental Platform for RFID Tag Localization Based on Fingerprinting

作　　者：陈鸿龙[1] 林凯[1] 闫娜[1] 刘宝[1] CHEN Honglong;LIN Kai;YAN Na;LIU Bao(College of Control Science and Engineering,China University of Petroleum(East China),Qingdao 266580,Shandong,China)

机构地区：[1]中国石油大学(华东)控制科学与工程学院,山东青岛266580

出　　处：《实验室研究与探索》2023年第11期50-53,共4页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(61772551);中国学位与研究生教育研究项目(2020MSA48);山东省本科教学改革面上项目(M2020205);山东省研究生教学改革项目(SDYJG19028);中国石油大学(华东)校级教改项目(SJ-202029)。

摘　　要：为帮助学生深入学习和理解基于指纹的射频识别(RFID)标签定位方法原理和应用,设计了一套基于指纹的射频识别标签定位实验平台。该实验平台由一台英频杰R420阅读器、一个后端服务器、多个RFID天线、一个无源标签组成。阅读器通过外置天线发送射频信号给标签,标签将收到的信号反向散射回天线,然后阅读器测得接收信号强度指示(RSSI)值,后端服务器根据接收信号强度指示值估算标签的位置坐标。该实验平台的定位过程分为离线与在线两个阶段。在离线阶段,后端服务器记录标签位于已知位置时阅读器接收到的信号强度指示值,并建立指纹库;在在线阶段,根据指纹库,采用K近邻算法和加权K近邻算法计算位置未知的标签坐标。In order to help the students learn and understand the principles and applications of the fingerprintingbased RFID tag localization,an experimental platform for tag localization of radio frequency identification(RFID)based on fingerprinting is designed.The designed experimental platform consists of an Impinj R420 reader,a backend server,multiple RFID antennas,and a passive RFID tag.RF signal is transmitted by the antenna and returned to the antenna after backscattering when it reaches the tag,the reader can measure the received signal strength indicator(RSSI)of the signal,and the backend server estimates the location coordinates of the tag based on the RSSI.The localization process of this experimental platform is divided into two phases:offline phase and online phase.In the offline phase,the RSSI is recorded when the tag is located at a known location to build a fingerprint database.In the online phase,the Knearest neighbor algorithm and the weighted Knearest neighbor algorithm are used to calculate the coordinates of the location unknown tag based on the fingerprinting database.

关 键 词：射频识别 指纹 K近邻 无源标签定位 

分 类 号：TP302.1[自动化与计算机技术—计算机系统结构]