Research on Ultrasonic Wireless Power Transmission Technology of Suspension Gap Sensor

The ultrasonic wireless power transmission (referred to as USWPT) technology is proposed to supply power for the suspension gap sensor, which maintains the structural integrity and sealing of the sensor metal shell, and solves the problems of high protection requirements, frequent maintenance and poor electromagnetic shielding effect caused by cable holes. In this paper, the complex working environment of maglev suspension gap sensor is analyzed, and the feasibility of USWPT technology for wireless power supply of sensor is explored. The validity of the equivalent circuit and impedance matching circuit of the ultrasonic transducer and the load characteristics of the overall system are analyzed by MATLAB simulation. In the end, the experimental platform of USWPT is designed and built to realize the low-power wireless power supply of the metal-isolated electrical equipment.