Capacitive Ecg Measurement By Conductive Fabric Tape (original) (raw)
Related papers
Sensors
The use of wearable sensors for health monitoring is rapidly growing. Over the past decade, wearable technology has gained much attention from the tech industry for commercial reasons and the interest of researchers and clinicians for reasons related to its potential benefit on patients’ health. Wearable devices use advanced and specialized sensors able to monitor not only activity parameters, such as heart rate or step count, but also physiological parameters, such as heart electrical activity or blood pressure. Electrocardiogram (ECG) monitoring is becoming one of the most attractive health-related features of modern smartwatches, and, because cardiovascular disease (CVD) is one of the leading causes of death globally, the use of a smartwatch to monitor patients could greatly impact the disease outcomes on health care systems. Commercial wearable devices are able to record just single-lead ECG using a couple of metallic contact dry electrodes. This kind of measurement can be used ...
Heart Monitor Using Flexible Capacitive ECG Electrodes
IEEE Transactions on Instrumentation and Measurement, 2019
Non-invasive sensors capable of measuring weak bio-potential signals such as ECG and EEG and communicating results wirelessly to a host computer are developing rapidly. Some of them utilize capacitively-coupled electrodes in an attempt to place the sensor at a distance from the skin. This study demonstrated the fabrication and development of a capacitivelycoupled ECG electrode prototype using custom high specific capacitance electrodes and custom high performance electronics. Two ultra-thin capacitive electrodes were fabricated on a flexible polyimide substrate (2 by 2 inches) protected by a guard ring to reduce noise. The detection and amplification circuitry consisted of op-amps that filtered and conditioned the ECG signal. Rpeaks in the ECG were readily detected and quantified using both simulated signals from ECG databases and real signals from human subjects. Heart rates and heart rate variability calculated from our monitor measurements were comparable with commercial rigid wearable sensors, including a smartwatch and an ECG monitor that uses standard clinical ionic electrodes. The prototype monitor was tested on human subjects during rest and moderate exercise and showed appropriate responses. The challenge of high-gain low-noise amplification was met by the development of highly thinned operational amplifiers whose operation was shown to be equivalent to commercially available rigidly packaged operational amplifiers, demonstrating that high performance Si-electronics can be used to produce high-fidelity signals from weak biopotentials.
ScienceDirect Measurement of capacitive coupled ECG from the car seat
The topic of the article is the design and construction of the device for measurement of ECG in the car. This device is divided into two parts: sensing part and processing part. These parts are described in detail in separated sections. The sensing part of the device was incorporated into the driver's seat. The ECG signal is measured through capacitive coupled electrodes installed in the seat that includes high-input impedance amplifier and sensing electrode surface. This sensing part of the device is capable of recording electrocardiogram data through clothing. Part of the hardware responsible for processing of the recorded signal was placed out of the seat and it is connected through shielded cable with sensing electrodes in order to reduce noise. The main part of the hardware dealing with signal digitalization and filtration utilizes analog front-end ADS1191 by Texas Instrument. It is possible to set up sampling frequency, gain of channel and configuration of RLD circuit during data acquisition. The experimental measurement and ability of the device to measure capacitive coupled ECG while driving are presented at the end of the article.
Development of Novel Non-Contact Electrodes for Mobile Electrocardiogram Monitoring System
IEEE Journal of Translational Engineering in Health and Medicine, 2013
Real-time monitoring of cardiac health is helpful for patients with cardiovascular disease. Many telemedicine systems based on ubiquitous computing and communication techniques have been proposed for monitoring the user's electrocardiogram (ECG) anywhere and anytime. Usually, wet electrodes are used in these telemedicine systems. However, wet electrodes require conduction gels and skin preparation that can be inconvenient and uncomfortable for users. In order to overcome this issue, a new non-contact electrode circuit was proposed and applied in developing a mobile electrocardiogram monitoring system. The proposed non-contact electrode can measure bio-potentials across thin clothing, allowing it to be embedded in a user's normal clothing to monitor ECG in daily life. We attempted to simplify the design of these non-contact electrodes to reduce power consumption while continuing to provide good signal quality. The electrical specifications and the performance of monitoring arrhythmia in clinical settings were also validated to investigate the reliability of the proposed design. Experimental results show that the proposed non-contact electrode provides good signal quality for measuring ECG across thin clothes. INDEX TERMS Arrhythmia, electrocardiogram (ECG), mobile electrocardiogram monitoring system, noncontact electrode, telemedicine.
Unobtrusive ECG monitoring in the NICU using a capacitive sensing array
Physiological Measurement, 2014
The thin skin of preterm babies is easily damaged by adhesive electrodes, tapes, chest drains and needle-marks. The scars caused could be disfiguring or disabling to 10% of preterm newborns. Capacitive sensors present an attractive option for pervasively monitoring neonatal ECG, and can be embedded in a support system or even a garment worn by the neonate. This could improve comfort and reduce pain aiding better recovery as well as avoiding the scars caused by adhesive electrodes.
Reusable Electrical Activity of the Heart Monitoring Patch for Mobile/Ubiquitous Healthcare
Journal of Medical Systems, 2009
In order to monitor electrical activity of the heart during daily life, we present an electrode of a medical instrument system which is able to measure the body surface potential difference by minimizing the electrode distance. The designed electrode is composed of concentric circles. It was made from the basis of the Laplacian equation, and implemented on PCB coated with gold. So that it does not cause the uncomfortable feeling of contact and possible skin troubles which are typical shortcoming of the conventional ECG measurement. The suggested method utilized three concentric circles on FR-4 substrate, so new amplifier design regarding measuring of small biological signal, is considered which has the characteristics of asymmetric input impedance since the area of concentric circular ring electrodes is not identical. Thereby, electrical activity of the heart was obtained successfully. However, its signal quality is a little bit degraded and the motion artifact still remains as a major problem as is in conventional electrocardiography measurement. Certainly stable measurement setup was needed to reduce the motion artifact originated from variation in static electricity between skin and electrode interfaces.
Wearable ECG Monitoring System Using Conductive Fabrics and Active Electrodes
Human-Computer Interaction. Ambient, Ubiquitous and Intelligent Interaction, 2009
The aim of this paper is to develop nonintrusive type ECG monitoring system based on active electrode with conductive fabric. Our developed electrode can measure ECG signal without the electrolyte gel or the adhesives causing skin trouble. For the stable measurement of ECG signal, the buffer amplifier with high input impedance and the noise bypassing shield with conductive fabric were developed. This system involves real-time ECG signal monitoring, and wireless communication using the Zigbee protocol. We show experimental results for developing wearable ECG monitoring system and demonstrate how it can be applied to the design of nonintrusive electrode with conductive fabric.
Wireless Capacitive-Based ECG Sensing for Feature Extraction and Mobile Health Monitoring
IEEE Sensors Journal, 2018
In this research the concept of a wireless wearable device capable of measuring ECG and respiration rate through the use of non-contact capacitive based electrodes was designed and implemented. Both ECG and respiration rate (RR) were measured using only the active electrodes and an analog conditioning circuit. The device utilises BLE for low powered wireless communication to the remote server. The measured data is used to calculate HRV, RR and extract ECG related features. It was found that the use of non-contact active chest electrodes are a viable approach for measurement. The system focuses on user comfort and the minimisation the ratio of the number of wearable sensors to sensed physiological parameters.