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  

Determination of Human Body Impedance Model and Parameters Under Floating-electrode Dielectric Barrier Discharge Excited by Nanosecond Pulse Voltage

作　　者：汪立峰 张波 刘峰 方志 WANG Lifeng;ZHANG Bo;LIU Feng;FANG Zhi(College of Electrical Engineering and Control Science,Nanjing Tech University,Nanjing 210009,China)

机构地区：[1]南京工业大学电气工程与控制科学学院

出　　处：《高电压技术》2019年第12期4122-4129,共8页High Voltage Engineering

基　　金：国家自然科学基金(51777091);江苏省研究生科研与实践创新计划(KYCX19_0875)~~

摘　　要：建立合适的人体阻抗模型及准确确定其参数对评估人体接触等离子体源及装置安全性至关重要,可为等离子体生物医学应用和医用等离子体源的开发提供指导。为此针对悬浮电极介质阻挡放电(floating-electrode dielectric barrier discharge,FE-DBD)作用于人体的电学安全问题,建立了FE-DBD作用于人体时的等效电气模型,将试验测得的人体接触时FE-DBD放电特性与SIMULINK仿真计算相结合,逐步求解确定了人体阻抗模型的参数。结果表明,人体在未发生气隙击穿放电时主要呈现容性,而气隙击穿放电时,人体呈现阻容特性,可以等效为电阻与电容的并联。在纳秒脉冲激励的FE-DBD作用下,等效电容约为79 pF,等效电阻在0.1~1 MΩ范围内,结果可为低温等离子体作用于人体的等效阻抗计算、人体电学参量估算和人体安全性评估提供参考。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.

关 键 词：低温等离子体 介质阻挡放电 悬浮电极 人体阻抗模型 参数计算 

分 类 号：G63[文化科学—教育学]