纳秒脉冲悬浮电极介质阻挡放电作用下人体阻抗模型及参数确定

Establishing appropriate model of human body impedance and accurately confirming its parameters are the key factors to estimate the safety of plasma source and device contacting human body, which can direct the application of plasma medicine and the development of plasma sources. Consequently, we developed an equivalent electrical model of floating-electrode dielectric barrier discharge(FE-DBD) on the human body to investigate its electrical properties especially the security features on the human body. The parameters of the corresponding model were determined by combining the analysis of experimental discharge characteristics and the simulation results obtained from SIMULINK. The results show that the impedance of human body is purely capacitive before the discharge breakdown occurs, while it presents the resistive-capacitive characteristics that can be equivalent to parallel connection of resistance and capacitance in the case of discharge. When the FE-DBD is connected to an ns pulse power supply, the equivalent resistance of human body is approximately 79 pF; meanwhile, the corresponding resistance is in the range of 0.1~1 MΩ. The results can provide references for human body impedance calculation of low-temperature plasma treatment, electrical parameters estimation across human body and human safety assessment of plasma processing.