人体通信中发送端接触阻抗的实验研究  

Experimental Study on Contact Impedance of Intra-body Communication Transmitter

作　　者：陈艺东[1] 曹玉婷[1] 高跃明[1] 潘少恒[1,2] 麦炳源[1,2] 韦孟宇[1,2] 李玉榕[1] 杜民[1] 

机构地区：[1]福建省医疗器械和医药技术重点实验室,福州350002 [2]澳门大学科技学院电机及电子工程系生物医学工程实验室,澳门999078

出　　处：《生物医学工程研究》2010年第1期13-17,共5页Journal Of Biomedical Engineering Research

基　　金：澳门科技发展基金项目(014/2007/A1);福建省科技厅重点项目(2007Y0024;2008J1005);澳门大学科研基金项目(RG051/05-06S/VMI/FST;RG061/06-07S/VMI/FST;RG075/07-08S/VMI/FST)

摘　　要：本研究着眼于电流耦合型人体通信方式,抽象并简化人体前臂的发送端等效电路模型。通过施加交变方波电流激励,测量使用不同尺寸电极时的模型参数,并比较不同频率下接收端的信号衰减率。结果表明人体前臂的信号衰减率随接触阻抗的增大而增大。在小腿处的测量也得到类似的结果。所以,在人体通信过程中应尽可能减小发送端"电极-皮肤"的接触阻抗,可提高通信质量。Focusing on the method of galvanic coupling, an equivalent circuit model of human forearm at the transmitter was simplified and developed. In order to clarify the effects of the electrode- skin impedance during intra- body communication（IBC）, an alternating square- wave current was adopted to measure the parameters of the model in different sizes of electrode arrangements. Furthermore, the signal attenuations at different frequencies at 10 vohmteers＇ forearm were compared. The results showed that theattenuations were increasing along with the electrode- skin contact impedance. Similar results also appeared in the measurements of the calf. Therefore, the minimizing electrode - skin contact impedance is supposed to improve the quality of Intra- Body Communication.

关 键 词：人体通信 电流耦合 接触阻抗 衰减率 交变电流 

分 类 号：R318.6[医药卫生—生物医学工程] R319[医药卫生—基础医学]