【摘要】 无锚节点定位算法无需预先部署锚节点,且不受网络部署规模和部署环境的限制,因此正成为无线传感器网络节点自身定位的一个重要研究方向。引入锚节点定位算法中共线度的概念,提出一种基于超声波四元阵测距的无锚节点定位算法,并进行超声波四元阵测距实验。以该测距实验取得的测距误差为依据,在OMNeT++平台下对定位算法进行仿真。仿真结果表明,引入共线度对于提高无锚节点定位算法的定位精度具有明显的效果。更多还原

【Abstract】 Anchor-free node localization algorithms do not require the pre-deployment of anchor node and are not restricted to the network deployment scale and environment; so,the anchor-free node localization algorithms have become an important research direction in wireless sensor network node self-localization algorithms. In this paper,we introduce the concept of degree of collinearity in the anchor node localization algorithms,and propose an anchor-free node localization algorithm based on four-element array for ultrasound ranging. An ultrasound ranging experiment with four-element array was conducted. On the basis of ranging error acquired from the ultrasound ranging experiment with four-element array,we simulated the algorithm on the platform of OMNeT + +. The simulation results show that introducing the degree of collinearity has obvious effect on improving the positioning accuracy of the anchor-free node localization algorithms.更多还原