一种基于高频RFID的室内定位方法的设计与实现  

Design and Implementation of an Indoor Location Method Based on UHF-RFID

作　　者：齐立磊[1] 梁智学[1] 冯高峰[2] 

机构地区：[1]南阳理工学院软件学院,南阳473004 [2]济源职业技术学院信息工程系,济源454650

出　　处：《计算机与数字工程》2013年第4期673-675,共3页Computer & Digital Engineering

摘　　要：根据定向阅读器波瓣图的特征,使用步进电机以恒定的角速度驱动UHF-RFID阅读器进行旋转。阅读器扫描覆盖区域内所有的标签,通过计算每个标签的发现时间和失去标签的到达时间差,计算出标签和阅读器之间的到达角数据,推算出标签以阅读器为中心的直线方程;同时结合阅读器旋转的弧度推算出标签所在圆方程轨迹,估算出阅读器的位置坐标。定位系统中只使用两个定向阅读器和若干标签,降低了定位系统的成本和系统的复杂度,提高了定位的精度和效率。An UHF-RFID directional reader is drived by a step motor to whirl with a constant angular, which depends on the lobe pattern for it＇s directional characteristic. And all tags in the area covered by the reader are scanned to obtaining the TDOA between found-time and loss-time, thus, AOA can be eaculated to make the linear formulation between the tags and reader in axis. The coordiante of every tag can be estimated by using the trajectory of every tag in accordance with it＇s circle formulation and the radian that the reader has been whirled. which reduces the complexity and enhances it＇s accuration and efficiency.

关 键 词：波瓣 RFID 到达角度 到达时间差 室内定位 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]