Study of the Properties of Plessey's Electrocardiographic Capacitive Electrodes for Portable Systems

Uvarov, Alexander; Lezhnina, Inna A.; Overchuk, K V; Starchak, A.; Akhmedov, Sh. D.; Larioshina, I A

doi:10.1088/1742-6596/671/1/012032

Cited by 8 publications

(4 citation statements)

References 8 publications

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“…The equivalent circuit of the capacitive−coupled electrode is generally represented by the parallel connection of a capacitor and a resistor [ 32 ]. However, it was confirmed that the silicon dioxide used in this study has a very large resistance (>10 16 Ω/cm) and the surface resistance of the fabricated electrodes is measured with a very large value (>2 × 10 8 Ω/cm 2 ) [ 33 ].…”

Section: Ecg Measurement System and Measurementmentioning

confidence: 99%

Development and Optimization of Silicon−Dioxide−Coated Capacitive Electrode for Ambulatory ECG Measurement System

Kang¹,

Choi²,

Koo³

et al. 2022

Sensors

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This paper presents a silicon−dioxide−coated capacitive electrode system for an ambulatory electrocardiogram (ECG). The electrode was coated with a nano−leveled (287 nm) silicon dioxide layer which has a very high resistance of over 200 MΩ. Due to this high resistance, the electrode can be defined as only a capacitor without a resistive characteristic. This distinct capacitive characteristic of the electrode brings a simplified circuit analysis to achieve the development of a high−quality ambulatory ECG system. The 240 um thickness electrode was composed of a stainless−steel sheet layer for sensing, a polyimide electrical insulation layer, and a copper sheet connected with the ground to block any electrical noises generated from the back side of the structure. Six different diameter electrodes were prepared to optimize ECG signals in ambulatory environment, such as the amplitude of the QRS complex, amplitude of electromagnetic interference (EMI), and baseline wandering of the ECG signals. By combining the experimental results, optimal ambulatory ECG signals were obtained with electrodes that have a diameter from 1 to 3 cm. Moreover, we achieved high−quality ECG signals in a sweating simulation environment with 2 cm electrodes.

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Section: Ecg Measurement System and Measurementmentioning

confidence: 99%

Development and Optimization of Silicon−Dioxide−Coated Capacitive Electrode for Ambulatory ECG Measurement System

Kang¹,

Choi²,

Koo³

et al. 2022

Sensors

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show abstract

“…The conventional electrodes are classified into three types: wet, dry, and capacitive (or insulating) electrodes [3,4]. The standard wet electrode-the silver/silver chloride (Ag/AgCl) electrode is commonly used due to its obvious advantages of good signal stability and low cost.…”

Section: Introductionmentioning

confidence: 99%

PU nanoweb-based textile electrode treated with single-walled carbon nanotube/silver nanowire and its application to ECG monitoring

Lee

Cho²

2019

Smart Mater. Struct.

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This paper is a research on textile electrodes fabricated by applying single-walled carbon nanotube (SWCNT) and silver nanowire (AgNW) to polyurethane (PU) nanoweb for monitoring electrocardiography (ECG) signals. In order to impart electrical conductivity, PU nanoweb was treated with SWCNT and AgNW. The PU nanoweb was dipped into 15 g of SWCNT dispersion mixed with 5 g of AgNW dispersion, and it was also treated with heat post-treatment and ethanol pre-treatment for enhanced conductivity. The electrical properties were evaluated by electrical linear resistance and impedance. The tensile properties were measured by Instron. By using the treated specimens, the wearable textile sensors were fabricated and verified to properly act as ECG electrodes via wear-trials compared to the conventional ECG electrode. To compare the ECG signals between Ag/AgCl electrode and textile electrodes, morphology of waveforms was compared and statistical analysis was also conducted. The results of the electrical properties showed that specimens SA1-H, SA1-E, and SA1-HE was much lower than SA1, and especially, SA1-H showed the lowest resistance. It corresponded to the results of impedance that specimen SA1 had the highest and specimen SA1-H had the lowest value. The results of the tensile properties showed that specimen SA1-H had higher tensile strength and elongation at break than the untreated. And, the results of the wear-trials showed that specimen SA1-H had the performance for ECG signals monitoring regardless of rest/stress-states, age, sex, and BMI index of the participants. Thus, it confirmed that the wearable textile sensors fabricated by using the SWCNT/AgNW treated PU nanoweb was suitable for ECG monitoring. Based on the results, it should have approximately 10 Ω cm −1 when applied as the ECG electrode for longterm bio-monitoring smart clothing.

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“…In the publications presented by the authors earlier [1], they published the results of performance tests for the capacitive electrocardiographic electrodes from "Plessey Semiconductors" as applied to portable systems. The study showed that the capacitive electrodes are appropriate for use in those areas where the need for speed and convenience of measurement prevail over the requirements to the signal / noise ratio (SNR) and measurement stability and requires repeated application.…”

Section: Introductionmentioning

confidence: 99%

Anti-Jamming Algorithm for Detection of QRS and ST Segments on Electrocardiogram

2016

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Abstract. As it was earlier described, capacitive electrodes could be widely used in electrocardiography, especially, in the state-of-the-art personal devices as they employ major advantages of these sensors. But such a way of electrocardiogram measurement usually generates quite noisy and unstable signals, which respectively must be processed with some anti-jamming algorithm. At the same time algorithm developers must take into account low computing power of portable personal devices, so designed methods must be "light" and "fast". Such an algorithm is developed by authors and is further described in this paper.

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Study of the Properties of Plessey's Electrocardiographic Capacitive Electrodes for Portable Systems

Cited by 8 publications

References 8 publications

Development and Optimization of Silicon−Dioxide−Coated Capacitive Electrode for Ambulatory ECG Measurement System

Development and Optimization of Silicon−Dioxide−Coated Capacitive Electrode for Ambulatory ECG Measurement System

PU nanoweb-based textile electrode treated with single-walled carbon nanotube/silver nanowire and its application to ECG monitoring

Anti-Jamming Algorithm for Detection of QRS and ST Segments on Electrocardiogram

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