Design of acoustic-electronic conversion channel of ultrasonic wireless power transmission

Through the theoretical analysis of the acoustic-electrical conversion channel of the ultrasonic wireless power transmission,one-dimensional simulation models were constructed using the electro-acoustic transmission line analogy method.To improve the accuracy and scope of application of the simulation,a finite element simulation model of the acoustic-electrical conversion channel was constructed using the finite element simulation software as well.Comparing the simulation results with the experimental results,the validity of the method was verified,and the influence of the load impedance on the energy transmission efficiency of the system was analyzed to optimize the acoustic-electric conversion channel.Based on this,an ultrasonic wireless energy transmission experiment system was designed.Ultrasound was successfully used to light 20 W bulbs through 8 mm thick copper plates,and the energy transmission efficiency reached 57%,which proved that it is feasible to transport electric energy through a metal wall by acoustic waves.