人体行走电压的时域波形研究

Modeling of human body walking voltage in time-domain

基于测试得到的人体行走电压时域波形,提出了仿真人体行走电压的等效电路模型构建方法,分析了模型参数对人体行走电压时域波形的影响.按照IEC 61340-4-5中规定的人体行走电压的测试方法,测试了不同温湿度、不同鞋、不同地板条件下,人体行走电压的时域波形.通过对大量实测人体行走电压时域波形的分析,提出了人体行走电压的等效RC电路模型,得到人体的带电量满足指数形式的充放电关系,其时间常数τ由等效电路模型的电阻R、电容C参数决定.人体行走中,人的动作引起人体电容的周期性变化,进而导致人体电压呈现周期性变化趋势.通过对比实测数据,模型与实验结果符合较好,人体动作引起的电压周期性变化一致性较好,实验具有很好的可重复性.

Based on the measurement of human body walking voltage,the RCequivalent circuit model for human body voltage charging by walking has been deduced and the model parameters affection on the time domain voltage waveform has also been analyzed.Firstly,human body voltage charging by walking has been measured in different condition of thermal conditions,floor types and shoes types according to standard of IEC 61340-4-5.Secondly,the human body walking voltage waveform has been analyzed,then the human body walking voltage equivalent RCcircuit model was deduced,and exponential function can be obtained to describe the human body walking voltage,the time constantτis determined by the human body resistance Rand capacity Cto the ground.Thirdly,the human body capacity is periodic changing with human body steps,so the human body voltage is also negatively changing with human body capacity.Therefore,the human body walking voltage can be modeled and fit very well with the measurement.