Abstract
Textile electrodes are an alternative to conventional silver-chloride electrodes in wearable systems. Their easy integration in garments and comfort provided to the user make them an interesting development of textile engineering. The potential of such electrodes to allow more unobtrusive data collection in health and sports context may enable the development of biosensing garments to be used in biomechanics. However, proper validation of the recorded signals is paramount, and few studies have yet presented consistent methodologies for textile-based electromyographic recordings. This study presents the validation of the electrical and morphological properties of electromyographic signals recorded with textile electrode, in comparison to conventional silver-chloride electrodes. Results indicate that both sets of electrodes have identical signal-to-noise ratios, but with distinct impedance frequency responses. Electromyographic envelope morphologies are also identical, although textile electrodes usually have lower amplitudes.
Highlights
The use of wearable solutions is a popular solution to perform human physiological and movement measurements (TAJ-ELDIN et al, 2018), allowing unobtrusive data collection.This is valuable in biomechanics, where movement should not be impaired by the measuring equipment
chloride electrode (CE) reduces its amplitude to 13.6 kΩ after showing a sharper transition at 100 Hz
The evaluation performed by the Signal to Noise Ratio (SNR) calculation of both signals revealed smaller average differences, when compared with the results obtained by authors like Chan and Lemaire (2010), and Laferriere, Lemaire and Chan (2011), that compared non-conventional electrodes with CE for EMG applications
Summary
The use of wearable solutions is a popular solution to perform human physiological and movement measurements (TAJ-ELDIN et al, 2018), allowing unobtrusive data collection. This is valuable in biomechanics, where movement should not be impaired by the measuring equipment. Silver-chloride electrodes are the most frequently used type of electrodes to perform this measurements, allowing the recording of good quality signals (XU; ZHANG; TAO, 2008). Some disadvantages such as skin irritation because of the fixation adhesives (CATRYSSE et al, 2004), the limited shelf-life, the dehydration over time (GRUETZMANN; HANSEN; MÜLLER, 2007; MAROZAS et al, 2011) and the heterogeneity of coupling silver-chloride electrodes with textile garments, led researchers to start looking for alternatives to record biopotentials
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