Sensor validation for wearable monitoring system in ambulatory monitoring: Application to textile electrodes

This paper discusses the reliability of textile sensors in wearable monitoring application. A methodology for the validation of new textile electrodes for monitoring subjects in daily activities is proposed. The protocol is divided in 2 phases: a laboratory set of tests to verify the "absolute" reliability of the electrodes; a second set of trials is carried out with subject performing activities of daily living while monitored through wearable systems. A two-lead portable electrocardiograph was used during the experimental protocol. ECG Signals and derived parameters were analyzed to assess signal quality and its processing possibility with respect to standard silver-silver chloride electrodes as reference. The method was applied to a case study to demonstrate applicability and results with silver based textile electrodes.