一种拓扑约束的RFID三维定位方法  

Topological constraints based 3D localization method of RFID tags

作　　者：黄双欢[1] 程良伦[1] 

机构地区：[1]广东工业大学自动化学院,广州510006

出　　处：《计算机应用研究》2012年第1期52-56,共5页Application Research of Computers

基　　金：国家基金广东省联合基金重点资助项目(U0935002);广东省重大科技专项(2009A080207008);广东省科技计划资助项目(2009B010800010)

摘　　要：针对现有RFID三维定位算法在运算时间复杂度问题上,收集的信息量较大、对定位的效率影响比较大,满足不了较高的RFID实时定位系统要求,提出了一种拓扑约束的RFID三维定位算法,使用虚拟地标与拓扑约束相结合对标签进行定位。通过引入一种松约束减少读写错误的影响,同时增加定位的精度。仿真结果表明,算法在不增加移动读写器时,定位精度为间隔的20%左右;在增加移动式读写器情况下,静态读写器间隔6m时,其瞬时定位精度为读写器间隔的12%,最终的迭代运算收敛后可获得0.4 m内的定位精度,为读写器间隔的6%。与传统LANDMARC系统定位精度为读写器间隔的50%左右相比,算法精度可以提高六倍以上。The existing three-dimensional localization method for RFID took a large operation time complexity and collected amount of information.It impacted the efficeiency of location greatly and could not meet the requirements of RFID real-time location system.To solute this problem,this paper proposed a topological constraints based 3D localization method of RFID tags.Combined virtual landmarks with defined topological constraints to localize tags.Applied arelaxation parameter to reduce the impact of reading and writing errors,and increasing the positioning accuracy at the same time.Simulation results show that when the interval of static reader has being set 6 m with additional mobile readers,the positioning accuracy is within 0.4 m,about 12% of the interval for readers,while positioning accuracy of the system in traditional LANDMARC is about 50%,that means the algorithm accuracy has been improved more than 6 times.

关 键 词：射频识别 三维 定位方法 拓扑约束 标签 

分 类 号：TP312[自动化与计算机技术—计算机软件与理论]