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

Low-Power Wearable ECG Monitoring System for Multiple-Patient Remote Monitoring

Many devices and solutions for remote electrocardiogram (ECG) monitoring have been proposed in the literature. These solutions typically have a large marginal cost per added sensor and are not seamlessly integrated with other smart home solutions. Here, we propose an ECG remote monitoring system that is dedicated to non-technical users in need of long-term health monitoring in residential environments and is integrated in a broader Internet-of-Things (IoT) infrastructure. Our prototype consists of a complete vertical solution with a series of advantages with respect to the state of the art, considering both the prototypes with integrated front end and prototypes realized with off-the-shelf components: 1) ECG prototype sensors with record-low energy per effective number of quantized levels; 2) an architecture providing low marginal cost per added sensor/user; and 3) the possibility of seamless integration with other smart home systems through a single IoT infrastructure

A Design and Implementation of an Ambulatory Electrocardiogram (ECG) Acquisition Circuit for Emergency Application

© 2018 IEEE. This paper presents the design and development of an ECG data acquisition circuit for emergency applications. The ECG signal extraction method and the design of the analogue front-end circuit are discussed. This design has been implemented in a printed circuit board (PCB), with comparable size to a 50 cent Australian coin. By applying the testing approach with this prototype, the output ECG trace quality is overall satisfactory with a clear display of QRS complex and certain robustness to motion artifacts

Southwest Research Institute assistance to NASA in biomedical areas of the technology utilization program

The activities are reported of the NASA Biomedical Applications Team at Southwest Research Institute between 25 August, 1972 and 15 November, 1973. The program background and methodology are discussed along with the technology applications, and biomedical community impacts

PCG and ECG Portable Acquisition System

Heart disease is the leading cause of death in the world, victimizing human beings in all age groups and from different geographic areas. Through the evolution of auscultation technology, the identification and analysis of heartbeats make it possible to prevent and treat heart pathologies with greater success. In this project, a portable, low-power system was developed that allows the acquisition of heart sound signals simultaneously in four different auscultation zones, as well as the acquisition of an electrical signal, subsequently conditioning and processing the different signals. The system also allows the transmission of signals in real-time via Bluetooth Low Energy to a mobile device where they can be recorded for future analysis. The portable system records four phonocardiographs located at four auscultation areas, namely the aortic valve, the mitral valve, the pulmonary valve and the tricuspid valve. These sound signals are converted to analog electrical signals that will be amplified, filtered and converted into digital signals. There is also a two-electrode electrocardiograph in this system, which is also amplified and filtered before being converted to a digital signal and transmitted via wireless communication. The entire system is powered by a battery with a charge voltage of 4.2 V, which allows it to be charged through the USB interface.As doenças cardíacas são a principal causa de morte no mundo, vitimizando seres humanos em todas as faixas etárias e de diferentes àreas geográficas. Através da evolução da tecnologia na auscultação, a identificação e análise dos batimentos cardíacos permitem prevenir e tratar patologias do coração com maior sucesso. Neste projeto foi desenvolvido um sistema portátil de baixa potência que permite a aquisição dos sinais sonoros do coração simultaneamente em quatro diferentes zonas de auscultação, assim como a aquisição de um sinal elétrico, fazendo posteriormente o condicionamento e processamento dos diferentes sinais. O sistema permite ainda a transmissão em tempo-real dos sinais via Bluetooth Low Energy para um dispositivo móvel onde podem gravados para futura análise. O sistema portátil regista quatro fonocardiogramas localizados em quatro áreas de auscultação, nomeadamente na válvula aórtica, na válvula mitral, na válvula pulmónica e na válvula tricúspida. Estes sinais sonoros são convertidos para sinais elétricos analógicos que serão amplificados, filtrados e convertidos de novo para sinais digitais. O sistema regista também o electrocardiograma através de dois elétrodos, que é também amplificado e filtrado antes de ser convertido em sinal digital e transmitido via comunicação sem fios. Todo o sistema é alimentado por uma bateria com tensão de carga 4.2 V, que permite ser carregada através de interface USB

Body sensor network for in-home personal healthcare

A body sensor network solution for personal healthcare under an indoor environment is developed. The system is capable of logging the physiological signals of human beings, tracking the orientations of human body, and monitoring the environmental attributes, which covers all necessary information for the personal healthcare in an indoor environment. The major three chapters of this dissertation contain three subsystems in this work, each corresponding to one subsystem: BioLogger, PAMS and CosNet. Each chapter covers the background and motivation of the subsystem, the related theory, the hardware/software design, and the evaluation of the prototype’s performance