Design Of A Two-way Wireless Charging System For Drones

Wireless sensor networks have great application value in Internet of Things,national security,environmental monitoring,industrial production,traffic management and other fields,which have attracted great attention.However,the development of wireless sensor networks has been restricted by power supply problems.Wireless power transfer technology is one of the effective ways to solve the power supply problem.The wireless power supply technology of wireless sensor networks has many problems in transmission distance,coil volume,etc.In this paper,we propose a bidirectional wireless charging system of UAV to solve the above problem.The bidirectional wireless charging system of UAV has been studied by us from the perspective of theoretical analysis,simulation and experimental research:Firstly,to solve the power supply problem of the wireless sensor networks,a method of wireless charging for sensor nodes by UAV is proposed.At the same time,the UAV can get the power through wireless charging at the ground transmitting side by the same coil.On the one hand,the transfer process of the magnetic coupling resonant wireless power transfer technology in the bidirectional charging system has been studied.Combined with the actual situation in the work of the UAV,it is confirmed that the optimal design of the coupling mechanism is the key to realize the wireless transfer of electric energy.On the other hand,through the study of the energy conversion process in the electric energy transfer process,the basic structure of the UAV bidirectional wireless charging system has been confirmed,which provides guidance for the construction of the experimental system.Secondly,on the basis of theoretical analysis,with the help of multiphysics simulation software,the radius of the coupling coil was studied.The influence of the coil radius on the power transfer effect in the wireless power transfer system has been obtained.Combining the design index of miniaturization of the coupling coil for UAV and sensors,the radius of the coupling coil in the bidirectional wireless charging system is designed and optimized.Then according to the design index of lightweight and high-efficiency coupling coil of UAV,the number of turns and turn spacing of all coupling coils in the system are designed and optimized.Finally,the experimental verification is carried out by building an experimental system.And the possible situation in the process of radio power transmission is studied.The experimental results are consistent with the simulation results,indicating that the coil optimization effect is obvious,which is suitable for the UAV bidirectional wireless charging system.Finally,based on the study of the basic structure of the bidirectional wireless charging system,the sensor,UAV transmitting side,UAV receiving side,and ground transmitting side devices were designed,built and experimentally studied respectively.The experimental results show that when the sensor needs to be charged,the UAV can provide power for the sensor;when the UAV needs to be charged,the ground transmitting side can provide power for the UAV.The applicability and practicality of the bidirectional wireless charging system is further proved.