Detection and Identification of Living Foreign Object in EV Wireless Charging System Based on Millimeter Wave Radar
Yuhong Mo, Shaonan Chen, Jing Xiao, Xiaorui Wu, Shuai Han · 2024
Wireless power transmission technology is the future development direction of electric vehicle charging. Aiming at the problem that the strong magnetic field between the coils of electric vehicle wireless charging is harmful to living health, this paper studies a detection method of living foreign matter in electric vehicle wireless charging system based on millimeter wave radar. Firstly, the distance and speed information of living foreign matter is measured by frequent-modated continuous wave 2D-FFT signal processing algorithm. Then, the relative motion state between the target and radar is judged by the distance and speed of the target, and a living foreign object recognition technology based on the target motion state is proposed. Finally, the simulation results in MATLAB show that this method can effectively obtain the target motion state, so as to effectively identify living foreign object, in order to timely control the electric vehicle wireless charging system when living foreign object invade.