Research On Laser - Coupled Resonant Wireless Energy And Signal Synchronous Transmission Technology

In recent years, magnetically-coupled resonant wireless power transmission has become a hotspot with its superior transmission characteristics among domestic and abroad research teams. However, in many special transmission environments, not only energy for wireless transmission is required, a signal transfer for feedback and controlling the transmission system is also needed.The design of transmission systems in this paper is based on magnetically coupled resonance wireless power transmission. And two wireless energy and signal transmission modes based on the same channel are proposed, which are adjustable amplitude and high frequency injection whose transmission’s feasibility is verified later. First of all, the principle of how resonant energy transfer system works is analyzed and transmission system theoretical analysis and parameter calculation are conducted by transferring coupling model theory and circuit analysis. The principle of synchronous transport signal of adjustable amplitude and high frequency injection are introduced which are two ways to transmit the signal by controlling the amplitude of transmission power and adding a new high-frequency signal carrier respectively. Circuit simulation software is used to verify the feasibility of the transmission. Transmission system overall hardware circuit is designed by combining theoretical model analysis, energy transmitting circuit, coupling coil, energy receiving circuit, signal modulation and signal demodulation circuit. Hardware circuit experimental test platform is constructed to do research and trials mainly for the transmission distance, frequency, load resistance and the resonant frequency those important variables on the transmission characteristics; experiment of magnetic shielding optimization is also done. Finally, two ways of signals synchronous transmission are experimented to analyze the rate and transmission factors of signal transmission.The final transmission system has a maximum output power of up to 10W when DC input voltage is 12V within the transmission distance of 5cm; overall hardware system transmission efficiency can reach 60%. Signal transmission function based on the same channel is implemented successfully and matches the anticipated experimental results.