A computer-controlled system for measuring an impedance locus of palmar skin.
A computer-controlled system for measuring an impedance locus of palmar skin.
复制标题
一种用于测量手掌皮肤阻抗轨迹的计算机控制系统。
DOI：
10.1163/156855701750383204
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
Y. Yamamoto
中科院分区：
文献类型：
--
作者：
H. Isshiki;Y. Yamamoto
与直流电（DC）方法相比，交流电（AC）方法很少用于皮肤电研究领域。然而，AC方法具有能够分析皮肤电活动（包括电容特性）的优点。为了建立一个简单的交流方法，本研究开发了一个计算机控制的测量系统。该系统可以在相位检测的基础上自动测量三个不同频率下的阻抗，并确定阻抗轨迹。利用RC并联电路的性能测试表明，该系统具有足够的精度。手掌皮肤阻抗也进行了测量和圆弧法参数的时间变化进行了研究。结果表明，该系统可以获得阻抗数据的数据采集时间小于0.2秒，可以很容易地确定阻抗轨迹。预计新系统，由于其高水平的准确性和易于操作，将被用作测量皮肤电活动的AC方法。
Compared to direct current (DC) methods, alternating current (AC) methods have rarely been used in the field of electrodermal research. AC methods, however, have the advantage of enabling analysis of electrodermal activity, including capacitive properties. To establish an easy AC method, a computer-controlled measurement system was developed in this study. The system can automatically measure impedances at three different frequencies on the basis of phase detection and determine an impedance locus. Performance tests using RC parallel circuits showed that the system has sufficient accuracy. Palmar skin impedance was also measured and temporal changes in parameters of the circular arc law were investigated. It was demonstrated that the system can obtain impedance data with a data acquisition time of less than 0.2 s and can easily determine an impedance locus. It is expected that the new system, due to its high level of accuracy and ease of operation, will be used as an AC method of measuring electrodermal activity.