The Structural Design And Properties Study Of Magnetic Resonance Coupling Underwater Wireless Power Transmission

With the application of Autonomous Underwater Vehicles(AUV)and underwater wireless sensor networks are becoming more and more complex.The energy supply of AUV,the energy supply and data transmission of sensors have been receiving much attention.At present,the water docking station usually supplies energy to the AUV in a one-to-one manner,which indirectly affects the task progress and efficiency of the AUV.At the same time,the traditional method of using metal cables to power sensors and return data has been unable to meet actual needs.The magnetically coupled resonant wireless energy transmission technology and near field communication technology both use magnetic field coupling to exchange energy between transmitting and receiving structures.Therefore,combining the two technologies has become an alternative solution for energy and information transmission.Based on the equivalent circuit and near-field electromagnetic field theory,this thesis studies wireless energy transmission technology and near-field communication technology,and provides a good solution to the existing problems.Aiming at the problem of energy supply and data return of sensors in complex underwater environments,this thesis proposes two types of underwater wireless energy and information synchronous transmission structure solutions.In the solution,the AUV is used as the power supply end and data receiving end,and the sensor is used as the power reception end and data transmission end.In order to reduce the influence of the coil angle deflection on the transmission process.Two sets of coils whose spatial positions are orthogonal to each other are used for energy and information transmission,respectively.A three-dimensional transmission structure is proposed.In order to reduce the influence of the coil offset on the transmission process.The relationship between the horizontal spacing between the coils and the system performance is studied.An array-type transmission structure is proposed and an application model is given.Both structures can achieve synchronization and independence of energy and information transmission processes,which provides a solution for sensor power supply and data return.Aiming at the current energy supply problem between the water facing station and the AUV.In order to achieve the docking station to provide efficient and continuous energy supply for multiple AUVs.Based on the near-field distribution of the electromagnetic field,this thesis proposes a new cubic transmitting coil structure.By analyzing the magnetic field distribution under different structural parameters,the coil structure was evaluated.The system transmissioncharacteristics of the coil structure were studied.A simulation model of multiple receiver coils is simulated.The simulation results show that the structure proposed in this thesis has the ability to efficiently charge multiple AUVs simultaneously.