传感器网中基于角度的移动目标跟测方法

Mobile target tracking method based on angle in sensor networks

为确定移动目标的位置,采用不同位置的多个无线传感器对目标所在方位角进行测定。通过映射建立与区域编号之间的联系,快速确定目标所在区域。运用基于角度的测量方法获取目标的水平位移增量和竖直位移增量,合成目标的位移,掌握目标不同时段的详细变化情况。对目标的移动趋势进行预测,根据趋势动态更新所围监测区域,对目标的移动进行有效监测。仿真结果表明,算法提高了能量的利用率,延长了网络的生存期,验证了算法的正确性。

To determine the position of the mobile target,multiple wireless sensors in different locations were used to measure the target azimuth.Through the mapping relationship between azimuth and area number,the target area was quickly determined.The horizontal displacement increment and vertical displacement increment of the target were obtained based on the angle measurement method,which were synthesized.The detailed changes of target in different periods were mastered.The movement trend of the target was predicted.The surrounding monitoring area was dynamically updated to monitor the target effectively.Simulation results show that the energy utilization is improved and the lifetime of the network is extended using the proposed algorithm.The correctness of the algorithm is verified.