基于超宽带技术的无线定位系统设计  

Wireless Location System Design Based on the UWB Technique

作　　者：陈雷 CHEN Lei(Zhuhai Unitech Power Technology Co.,Ltd.,Zhuhai 519000,China)

机构地区：[1]珠海优特电力科技股份有限公司,广东珠海519000

出　　处：《计算机测量与控制》2022年第12期189-194,202,共7页Computer Measurement &Control

摘　　要：随着基于位置信息的服务越发受到重视,无线定位技术也得到了快速的发展;其中,超宽带技术具有测量精度高、功耗低的特点,越来越被广泛地应用于无线定位系统中;但是,由于无线信号的传播容易受到环境干扰,导致在复杂环境下,定位精度急剧下降,制约了这种定位技术的应用与推广;针对超宽带无线定位系统中的这个问题,提出了一种基于残留误差的聚类算法,将原始定位数据进行重组后进行计算,并过滤掉误差过大的结果,再利用误差值进行计算结果的聚类处理,进而得到最终的定位结果;使用该算法的超宽带无线定位系统已经通过了工程验收(定位频率2 Hz,残留误差门限值1.5 m,置信距离差值门限0.5 m,迭代上限10000次),实际测试的结果表明该算法有效提升了定位精度,满足了工程需要,为无线定位技术的推广提供了重要的技术保障。With an increasing attention to the location-based service,wireless locating technique has developed rapidly.Ultra-Wide Band(UWB)locating technique has the characteristics of high measurement accuracy and low power consumption,which is more and more widely used in wireless locating systems.However,the propagation of wireless signals is easily disturbed by electromagnetic environment,leading to the severe decline in locating accuracy in complex situations,which restricts the application and promotion of this technique.To solve the problem of the UWB locating system,an optimised cluster algorithm is proposed with the aid of residual errors.Raw data is firstly reassigned into groups,and each group of data is used to obtain the coordinates as well as the residual error.After filtering those with exceeded residual errors,the remaining coordinates are processed by the clustering algorithm with the residual errors,and then the final locating result is obtained.The wireless locating system with the introduced algorithm is approved by several engineering projects(2 Hz of locating frequency,1.5 m of residual error threshold,0.5 m of confidence distance error threshold,10000 times of iteration upper limit).Practical results show that the algorithm effectively improves the locating precision and meets the engineering demands,which provides the technical support for promoting the wireless locating technique.

关 键 词：超宽带技术 无线定位系统 残留误差 聚类算法 定位精度 

分 类 号：TN92[电子电信—通信与信息系统]