Wireless sensor networks are more and more widely used,in order to solve the energy problem of sensor nodes,wireless charging is applied to sensor networks.UAV is used to charge sensor nodes wirelessly,but the battery capacity of UAV is limited,Reasonable path planning can make the UAV obtain the minimum charging cost and the maximum network utility.Taking minimizing the energy consumption of UAV as the optimization objective,the energy consumption of UAV is analyzed,the optimization objective is simplified to minimize the path distance,and the genetic algorithm is used to plan the path of UAV.Aiming at the problem that genetic algorithm is not suitable to solve the problem of many target points,a radius based clustering algorithm is proposed to cluster the nodes,calculate the charging residence point of each cluster and reduce the number of target points.The simulation results show that the charging path obtained by the designed algorithm is shortened by 33.52%,and the energy consumption of UAV is reduced by 35.29%.
Key words
wireless sensor network /
path planning /
clustering /
genetic algorithm
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