摘要
介绍一种具有声定位功能的无线传感器网络节点,可以实时测量目标节点的方位和距离。对目标方位的估计基于四元十字阵列的时延估计法,对目标距离的估计采用TDOA机理的测距原理。实验测试表明,整个系统在空闲状态下的电流不大于20μA,在15 m的范围内,距离误差小于3%,方位角误差则随着采样率或阵元间距的增大而减小。
A wireless sensor network node with acoustic self-localization technology is introduced. The node can obtain the real-time orientation and distance information of the object node. Cross array time-delay estimation method is adopted to measure the orientation and TDOA mechanism is used to measure the distance. Test shows the system power supply in idle state is less than 20 μA, distance error is less than 3%, and angle error decreases with the sampling rate or array range increasing in the 15 m range.
出处
《计算机工程》
CAS
CSCD
北大核心
2008年第23期107-109,共3页
Computer Engineering
