类GPS超声定位系统中观测数据的几何约束处理方法  

Geometric Constraint Processing Method of Observation Data in Quasi-GPS Ultrasonic Location System

作　　者：程晓畅[1] 苏绍景[1] 王跃科[1] 

机构地区：[1]国防科技大学机电工程与自动化学院仪器系,湖南长沙410073

出　　处：《计算机测量与控制》2007年第12期1766-1768,共3页Computer Measurement &Control

摘　　要：介绍了类GPS超声定位系统及其工作原理,如果超声传感器受到外界环境振动冲击或者外界干扰声源的影响,那么通过距离估计算法得到的定位物体与定位基站的观测伪距就可能出现野值,针对上述问题,以距离几何学中的Blumenthal嵌入定理为基础,建立了一种以两个和三个基站进行定位时的观测数据几何约束处理方法;理论分析与仿真结果表明,通过该方法可以剔除掉观测数据中的野值,从而为定位物体的位置估计提供更加有效的观测数据。Firstly, Quasi-GPS ultrasonic location system and its work principle are introduced. The erroneous distance estimation val- ue by distance estimation algorithm between location object and location base- stations will be exist if the ultrasonic transducers are influenced by outside noise. In allusion to the above question, an effective observation data processing method called geometric constraint is presented by means of Blumenthal embedding theorem of distance geometry when using two or three base-stations for location. It is verified by theory and simulation that we can eliminate the wild observation data by the above method and therefore provide more valid observation data for locating object＇s position estimation.

关 键 词：类GPS 超声定位 Blumenthal嵌入定理 几何约束处理 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]