Performance Evaluation of the Proper Pressing Method and Materials with Regard to EMG Textile Electrodes
Vol. 59, No. 5, pp. 248-256,
Oct. 2022
10.12772/TSE.2022.59.248
PDF
Abstract
After COVID-19, there is a growing demand for bio-signal wearable devices in
everyday life owing to an increasing interest in health and fitness. Studies on wearable surface
electromyography (sEMG) electrodes are being conducted because sEMG can measure
muscle activity signals without incurring pain and bleeding. EMG electrodes are made
of gel (i.e., Ag/AgCl); however, they are not suitable for long-term use in everyday life owing
to their strong adhesive force and adverse impact on the skin. Accordingly, dry textile electrodes
are required, along with electrode materials and compression methods suitable for
obtaining EMG signals. Therefore, this study evaluated the performance of the EMG electrode
compression method and appropriate textile electrode materials. Conductive textile
electrodes were made of silver fabric, silver coating fabric, carbon fabric, and CNT-Dipping
neoprene, and an EMG sensor was positioned at the biceps according to the SENIAM to
obtain signals and raw data for each material and compression method. Silver fabric exhibited
a significant muscle active/release signal data difference and low dispersion and
demonstrated a high signal-to-noise ratio (SNR), which confirms that it is the most appropriate
electrode material for conducting measurements. Therefore, while comparing the
SNR of the silver fabric electrode and general wet electrodes in the band type, it exhibited
similar performance and indicated that the wet electrode can be replaced with a textile dry
electrode (band silver fabric electrode: 16.14±1.50; wet electrode: 17.77±1.00).
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