Wearable biopotential measurement using the TI ADS1198 analog front-end and textile electrodes : signal conditioning and signal quality assessment

The development of mobile systems for monitoring bioelectric signals outside a hospital environment involves many challenges that do not arise when it is in a controlled environment, like a hospital. The dimensions of these systems are an important factor to consider in order to facilitate their use without interfering with the daily activities of individuals. The purpose of this work is the implementation of a single-supply battery-powered, low power ECG/EMG signal monitoring system based on the ADS1198 Analog Front-End from Texas Instruments. The system was designed to acquire ECG signals from three electrodes using the integrated Right-Leg-Drive (RLD) circuit from the ADS1198. The developed analog front-end was connected for testing purposes through the SPI interface to a NI-USB 8451 board and signals were acquired using LabVIEW. The circuit was tested in several situations and proved to provide high quality signals using textile integrated electrodes and conventional disposable gel electrodes.FEDER- “Programa Operacional Factores de Competitividade – COMPETE”, FCT - Fundação para a Ciência e a Tecnologia, projects PEst-C/CTM/UI0264/2011 and PTDC/EEA-ELC/70803/2006, and Instituto de Telecomunicaçõe

Smart shirt with embedded vital sign and moisture sensing

This paper presents the development of a smart shirt with embedded electrodes in two-lead configuration for heart rate measurement and a knitted moisture sensor for sweat detection. Signal conditioning for heart rate measurement is based on the Analog Devices AD8232 heart rate monitor front-end. The shirt is part of a fireman interactive Personal Protective Equipment (PPE), which monitors information on heart rate and sweat detection, among other variables. Sweat detection is used to avoid skin burns that may occur due to the combination of excessive moisture and heat. Tests have demonstrated that the measurement of heart rate using the shirt is as efficient as conventional solutions, such as heart-rate monitoring straps. Sweat detection through textile moisture sensors has also shown to be effective.FCT - Fundação para a Ciência e a Tecnologia, in the framework of project UID/CTM/00264/2013 and project PROTACTICAL - Co-Promoção Nº Projecto: 23267, sponsored by ADI

Health monitoring using textile sensors and electrodes: an overview and integration of technologies

Publicado em "MeMeA 2014 International Symposium on Medical Measurements and Applications : proceedings", ISBN 978-1-4799-2920-7This paper gives an overview of technologies and results of integration and test of textile integrated sensors and electrodes for monitoring of biosignals (electrocardiographic - ECG and electromyographic - EMG), breathing and moisture. Using a seamless jacquard knitting machine, it is possible to integrate these sensors and electrodes directly into the fabrics, which can then be used in clothing for monitoring of elderly people, in sports or in hazardous occupations. The total integration of the sensing elements and connections into the garment presents great advantages in physical as well as psychological comfort of the user. It has been shown that the measurements are of adequate quality for most of the applications. In some cases, as is the case of ECG and EMG, signals acquired are similar to those obtained using conventional electrodes.The authors wish to thank funding by FCT -Fundação para a Ciência e a Tecnologia, projects PEst-C/CTM/UI0264/2011, PTDC/DTP-DES/1661/2012 and project PROTACTICAL - Co-Promoção Nº Projecto: 23267, sponsored by AD