Real time impedance plots with arbitrary frequency components
Real time impedance plots with arbitrary frequency components
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DOI：
10.1088/0967-3334/20/1/008
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发表时间：
1999-02-01
影响因子：
3.2
通讯作者：
Kirkup, L
中科院分区：
文献类型：
--
作者：
Searle, A;Kirkup, L
与皮肤接触的生物电极的阻抗谱的时间变化为不同电极材料和皮肤准备方法之间的比较提供了有用的数据。传统的阻抗测量系统采用扫频法，这会使具有非平稳电特性的样品的阻抗谱失真。本文报道的系统通过施加由许多频率分量组成的数字构造的波形来获得阻抗谱。这允许在多个频率下同时测量阻抗值。提供了样本数据，并与使用类似的方波技术获得的数据进行了比较。
Temporal changes in the impedance spectra of bioelectrodes in contact with skin provide useful data for comparisons between differing electrode materials and skin preparation methods. Traditional impedance measuring systems employ swept frequency methods which will distort results in the impedance spectra of a sample which has nonstationary electrical characteristics. The system reported here obtains impedance spectra by applying a digitally constructed waveform consisting of many frequency components. This allows impedance values to be measured at a number of frequencies simultaneously. Sample data are provided and compared with data obtained using similar square wave techniques.