静电放电参数对电极速度的相关性与机理分析  

Correlation investigation of discharge parameters with contact approach speed and its mechanism in human-metal electrostatic discharge

作　　者：阮方鸣[1,2] 高攸纲[1] 石丹[1] 汪柳平[1] 周峰[1] 

机构地区：[1]北京邮电大学环境电磁学研究所,北京100876 [2]贵州师范大学物理与电子科学学院,贵州贵阳550001

出　　处：《电波科学学报》2008年第5期977-981,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金(50237040);贵州省科技基金([2007]2211)

摘　　要：同步测量了带电人体手握金属小棒电极放电电流的参数和电极运动速度。金属小棒电极与靶电极相撞时的速度对放电电流参数(放电电流峰值、放电电流时间变化率的峰值、火花放电的弧长)的影响,用统计软件SPSS进行了考察,获得了在不同人体电压情况下小棒电极运动速度与放电参数的相关系数。结果表明:充电电压为0.3kV时,放电参数与电极运动速度无关。充电电压为0.5kV及其以上电压时,电极运动速度与放电电流峰值、电流最大上升斜率有极强的正相关性;与放电火花弧长有极强的负相关性。电极向靶的快速接近改变放电间隙的空气压强,改变间隙两端的电场强度,从而引起放电参数的显著变化。Characteristics measurement of contact discharge currents through a handheld metal rod are made from charged human-body. Effects of electrode approach contact speeds on discharge current parameters of current peaks, peak current derivatives and spark length are examined through statistics methods. At charge voltage of 0.3kV discharge parameters is independent on approach speed. For charge voltages 0. 5kV and the higher, contact approach speed have strong positive correlation with peak current and peak current derivative; meanwhile has strong negative correlation with spark length. Fast electrode approach to target creates reduction of air pressure and intensifies electric field across the gap, which, in turn, results in prominent effect on discharge parameters.

关 键 词：静电放电 金属小棒 放电电流 碰撞速度 统计相关 

分 类 号：O441.4[理学—电磁学]