Kontaktování textilních elektrod pro potřeby měření EKG

Abstract

In recent years, there has been a rapid development of conductive textiles and there are efforts to use these textiles in many industries. One of the issues addressed is the creation of conductive contact between the textile sensor and the conductor. This thesis therefore provides a basic introduction to the use of conductive textiles for electrodes in electrocardiography and in particular reviews methods for contacting textile electrodes. It includes a search of articles related to different contacting methods in this field. In the experimental part, six types of textile electrodes have been designed and constructed using different contacting methods - namely bonding (two different adhesives), sewing (two different conductive yarns), soldering and crimping with a button. The electrodes were then tested on a set of 15 volunteers. ECG signals were simultaneously recorded for each subject using textile and reference Ag/AgCl electrodes. Three evaluation parameters were used for evaluation: correlation, mean square error (MSE) and structural similarity index (SSIM). The results showed that most methods achieved comparable values with the reference electrodes. The best results in terms of SSIM were achieved by the crimp-jet method, while the low-cost conductive adhesive bonding method showed the best average values of correlation and MSE. The choice of the appropriate contacting method depends mainly on the specific application.