基于声表面波技术的室内定位系统  

Indoor Positioning System Based on Surface Acoustic Wave Technology

作　　者：赵文玉 陈智军[1] 郭佳佳 代重阳 徐海林[2] 贾浩 ZHAO Wenyu;CHEN Zhijun;GUO Jiajia;DAI Chongyang;XU Hailin;JIA Hao(College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;CETC Deqing Huaying Electronics Co., Deqing 313200, China)

机构地区：[1]南京航空航天大学自动化学院,江苏南京211106 [2]中电科技德清华莹电子有限公司,浙江德清313200

出　　处：《测试技术学报》2020年第5期407-412,共6页Journal of Test and Measurement Technology

基　　金：国家自然科学基金资助项目(51475240);南京航空航天大学研究生创新基地(实验室)开放基金资助项目(kfjj20180301)。

摘　　要：针对现有采用接收信号强度RSSI原理的室内定位系统存在的问题,鉴于声表面波技术的无源、受多径效应影响小等优势,搭建了由声表面波定位标签和阅读器构成的室内定位系统.阅读器分时读取3个阅读器天线接收到的定位标签回波信号,与常规的室内定位硬件系统采用3个信号接收机相比,大幅度降低了成本.标定了系统的信号强度与距离之间的关系,采用基于RSSI原理的三边定位算法测试了系统的定位性能,其有效定位范围为1.6 m×1.6 m,定位精度为13 cm.To improve the indoor positioning system based on the principle of received signal strength indication(RSSI),utilizing the passive nature and the small influence of multipath effect of surface acoustic wave technology,this paper built the indoor positioning system composed of surface acoustic wave positioning tags and a reader.The reader obtains the positioning tag echo signals received by three reader antennas in a time-division manner,such operation greatly reduced the cost compared with the conventional indoor positioning hardware system using three signal receivers.The relationship between the signal strength and the distance was calibrated.The positioning performance of the system was tested by the trilateral positioning algorithm based on the RSSI principle.The results show that the effective positioning range is 1.6 m×1.6 m,and the positioning accuracy is 13 cm.

关 键 词：室内定位 声表面波定位标签 三边定位 阅读器 天线 

分 类 号：TB921[一般工业技术—计量学] TN65[机械工程—测试计量技术及仪器]