一种事件驱动型无线传感器网络目标追踪算法的研究

A Target Tracing Algorithm Based on Event-Driven WSN

无线传感器网络节点无论在军用还是民用领域都非常适合进行活动目标的追踪任务。基于现有的常用定位算法的分析与研究,针对所提出方法在实际应用中存在如何提高定位精度与减少网络计算开销的难题,提出一种基于最小二乘二步优化目标定位算法;采用分段低阶曲线拟合法计算目标轨迹并预测目标路径,一种路径模型选择机制保障低阶曲线轨迹的拟合精度并降低计算开销,以及目标意外丢失后的恢复策略。仿真结果表明,改进后的目标跟踪算法改善了目标定位和目标位置预测效果,获得跟踪精度较高、网络计算开销较低的效果。

Wireless sensor network（WSN）nodes are very suitable for moving target tracking tasks both in military and civilian areas.The paper studied the target tracking mechanisms based on existing research by using two-step optimum strategy that a target localization algorithm is ameliorated,and a path model selection mechanism to solve the ineffective curve-fitting problem resulted from low order curve function in position predict application.In this paper,a recover strategy after target lost is proposed.Emulation results indicated that the ameliorated target tracking algorithm had improved the effects of target localization and prediction,attained high tracing accuracy and low energy consumption results.