射频识别动态定位方法

摘要

A novel proximity method-RFID dynamic positioning method was presented, using a moving radio frequency identification (RFID) reader to accurately position the target based on reference tag arrays. The major advantage of the method was that through reading tags without any measurement data, e.g., the time of arrival (TOA) or the received sig-nal strength indication (RSSI), it improved the accuracy of positioning target based on reference tags and a moving reader. The algorithm was simple but useful. Based on the performance of the prototype system, it demonstrated that the pro-posed system could accurately position in one of the smallest reference tag cell (within dozens of centimeters) and could be deployed easily with low cost, thus has potential application in RFID warehouse management.%　　提出一种新型的通过参考标签和移动 RFID 射频读写器进行定位的方法。该定位方法的主要优点是不需要记录任何测量信息如 TOA、RSSI 等，而是通过移动读写器，不断对目标标签和参考标签进行读取，经椭圆还原算法对读区域进行还原，最终以交集计算实现定位。该方法思路简单，但实现了较高精度的 RFID 室内定位。实验结果表明，该定位方法的精度可在最小的参考标签单元格内(可到达数十厘米级)，同时建立的原型定位系统具有成本低、易于部署等特点，存在应用于大规模 RFID 仓储定位管理的可行性。