传感器网络时间差双曲线目标定位方法  

A Method of Hyperbola Object Localization Based on Time Difference in Sensor Networks

作　　者：程远国[1] 陈云[1] 杨津骁[1] 

机构地区：[1]海军工程大学电子工程学院,武汉430033

出　　处：《武汉理工大学学报（交通科学与工程版）》2013年第1期131-134,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：国家863计划项目资助(批准号:2007AA01Z309)

摘　　要：针对基于声传感器的传感器网络目标定位问题,提出了一种基于时间差的声源双曲线目标定位方法.该方法根据声信号到达不同传感器时所形成的一组时差,经过解算确定目标位置.为简化计算,选取了位于相对坐标系坐标轴上的3个特殊的传感器节点来生成各自的声源双曲线,计算目标在相对坐标系中的位置,再通过坐标转换,得到目标的绝对坐标系位置,从而实现目标定位.数值仿真表明所提方法具有较好的定位精度.Aiming at the issue of object localization in sensor networks based on acoustic sensors,a method of hyperbola localization based on time difference of arrival is proposed.This method computes the location of an object by employing a group of time differences which are formed by the acoustic signals arriving at various sensors.Three particular sensors are employed to build the relative coordinates and create their respective hyperbolas of acoustic source;the locations of an object can be computed by these hyperbolas,which are expressed as the relative coordinates.These relative locations are transformed to be the absolute locations by coordinates transforming.Some simple simulations show this method has favorable localization accuracy.

关 键 词：传感器网络 目标定位 时间差 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]