Development of capacitively-coupled multi-channel surface EMG interface

本研究的目的是开发一种能利用电容耦合多通道表面肌电信号中的神经肌肉信息，并能在衣服上进行记录的计算机接口。结果表明，在电极板周围设置保护层可以降低信噪比。同时，利用模拟的肌电模型研究了信噪比与肌电传导速度之间的关系。基于仿真的肌电信号模型，阐明了信噪比与峰度之间的关系。结果表明，利用峰度可以方便地测量真实的肌电信号的信噪比，为研制电容耦合多道表面肌电信号的计算机接口提供了有利条件。

The purpose of this study is to develop the computer interface which uses neuromuscular information from capacitively-coupled multi-channel surface EMG signals and then which can record over clothes.In this study, firstly, how shapes of capacitively-coupled electrode effect output signal is examined with the hardware model. The result shows that signal-to-noise ratio can be reduced with guarding around the electrode plates. Also, the relationship between signal-to-noise ratio and muscle conduction velocity is examined with simulated EMG model. Based on the simulated EMG model, he relationship between signal-to-noise ratio and kurtosis is clarified. From the result, we can easily measure signal-to-noise ratio of real EMG signal with kurtosis.This study made advantages for developing the computer interface with capacitively-coupled multi-channel surface EMG signals.