Research On Energy Replenishment Method Based On Magnetic Coupling Resonant Charging Technology In WRSN

The energy replenishment problem is an important research topic in Wireless Rechargeable Sensor Networks(WRSN).This paper is based on the magnetic coupling resonant charging technology.Based on the magnetic coupling resonant charging technology,this paper proposes two feasible and effective solutions for energy replenishment of WRSNs from both single-to-multiple and multi-hop perspectives,and the main research contents are as follows.First,with the help of magnetically coupled resonant charging technology,a single charging device can realize energy replenishment of multiple sensor nodes simultaneously,thus improving the network charging efficiency and reducing the charging cost.Existing single-to-multiple charging schemes tend to ignore the energy distribution of magnetically coupled resonant charging technology,and the impact of mutual inductance on energy transfer efficiency generated by physical factors such as height,angle and distance between the transmitting and receiving coils,and multiple receiving coils is not considered for the docking position(i.e.,stationing point)of the mobile charger.In this paper,we mainly consider the mutual inductance generated by distance,and propose an online energy replenishment strategy(OMRN),which is based on the mutual inductance model and the siting problem of the center of gravity method on the continuous plane,to find the optimal stationing point of the mobile charger based on the distance between coils,so that the energy reception of multiple nodes can be balanced,thus reducing the total charging time and maximizing the charging efficiency.Second,the energy can be transmitted through resonant repeaters to achieve multihop transmission,so that the charging distance can be extended.In this paper,we propose to configure resonant repeaters on the actuators,and since the actuators are movable and controllable,the actuators can be moved to suitable relay positions,and the energy is forwarded to multiple sensor nodes within the charging coverage area through the actuators,which enables multiple nodes to charge at the same time and reduces the charging time,and after the network topology changes,the base station will revert to the least number of relay positions based on the set of band weights to cover the problem,The set of relay locations with the least number of weights and weights.Simulation experiments show that the method proposed in this paper can significantly reduce charging cost and charging delay,reduce node failure rate,and thus extend the network survival time.