一种管廊下UWB TOA二维定位方法及误差分析  

A Two-dimensional Positioning Method and Error Analysis of UWB & TOA Under Pipe Gallery

作　　者：黄波[1] 冯泳 唐素敏 

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《工业控制计算机》2021年第2期17-20,共4页Industrial Control Computer

摘　　要：超宽带UWB定位技术可用于管廊内人和物的高精度定位。考虑的管廊长而狭窄,故常选择将UWB锚点部署在一条直线上。基于近似极大似然估计TOA定位算法,实现管廊内一条线上部署锚点情况下的二维定位,并对定位精度和锚点部署间距、高度之间的关系进行了理论分析和仿真验证。研究发现宽度方向定位误差与最近传感器之间的距离和传感器与标签之间的垂直高度呈正相关,且在两个UWB锚点中间位置会出现最大误差。仿真结果表明,将锚点部署在管廊的一侧,且高于管廊内地面1~2m位置时可获得较好的定位效果,管廊长度方向定位精度可达到cm级,宽度方向误差低于1.5m。Ultra-wideband(UWB) positioning techniques can be used to accurately position in the pipe gallery.Anchor node often deployed in a straight line,considering the reality that the pipe gallery is long and narrow. Based on the approximate maximum likelihood estimation algorithm about TOA positioning,this paper realizes the two-dimensional positioning when the anchor nodes are deployed on a line of the pipe gallery,and theoretically analyzes and simulation verification the relationship between the positioning accuracy and deployment distance and height of the anchor node.The study found that positioning error is about of the width direction,which is positively correlated with the distance between the label and anchor node that is the nearest with it.The largest error occurs in the middle of the two UWB anchor nodes.The simulation results show that the anchor node is deployed in A better positioning effect can be obtained when one side with against the pipe gallery is 1~2 meters above the ground in the pipe gallery.the positioning accuracy can reach cm level in the length direction of the pipe gallery,and error is less than 1.5 m in the width direction.

关 键 词：管廊 定位 超宽带 到达时间 

分 类 号：TN925[电子电信—通信与信息系统]