Basic Investigation on Perspiration Assessment Using Capacitively Coupled Electrodes

Abstract

During over-night measurements using capacitively coupled electrodes, the amplitudes of the observed signals were often influenced by perspiration. This study aims to employ the phenomenon as a method for assessing perspiration. As a preliminary stage, this study investigated a quantitative relationship between the amplitude of the signal and the quantity of the saline, which was used instead of sweat to increase reproducibility. For the same purpose, an ECG simulator was used. Several types of clothes, such as 100% cotton, were used as insulator. The results for different clothes showed similar piecewise-linear relationships, suggesting that this method could be the basic principle of perspiration assessment using capacitively coupled electrodes.