An Analysis on the Effect of the Shape Features of the Textile Electrode on the Non-contact Type of Sensing of Cardiac Activity Based on the Magnetic-induced Conductivity Priciple

Gi, Sun Ok; Lee, Young Jae; Koo, Hye Ran; Khang, Seon Ah; Park, Hee Jung; Kim, Dae Young; Lee, Jeong‐Whan

doi:10.5370/kiee.2013.62.6.803

Cited by 8 publications

(6 citation statements)

References 5 publications

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“…고감도 인체 센싱의 직물전극 모듈을 제작하기 위한 본 연구 의 선행 연구로서, 텍스타일 센싱에 중요한 요인이 되는 도전성 섬유를 일반사와 합연하여 사가공한 도전사를 직조구조(woven structure)로 직물화(fabrication)하여 환경연동형 생체신호 감지 기능의 IT 기반 직물전극을 제작함으로써 스마트 의류 통합화를 모색하였다 [6]. 또한 금속성 도전 섬유소재를 적용한 직물전극은 자계 유도성 기반의 비접촉식 심장활동 센싱에서도 신호 획득이 가능하다는 결과도 도출하였다 [7]. …”

Section: 서 론 최근 It기술과 도전(導電) 섬유의 전도성(傳導性)을 융합 구현 한 텍스타일 직물전극을 적용함으로써 unclassified

A Design of Infant's Body Temperature Sensing System Based on Embroidery Textile Conductive Wire

Song¹,

Lee²,

Lee³

2016

The Transactions of The Korean Institute of Electrical Engineer

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-In this study, the embroidery textile conductive wire of conductive yarn was designed into the wearable integrated clothing for sensing the infant's body temperature. To develop a high quality of the stable fiber-based textile conductive wire, firstly the five types of conductive yarns were twisted or covering polyester yarns and the coated conductive fiber with silver(Ag) or iron(Fe). As a result of comparative conductivity in conductive yarns of yarn processing, the 250 denier of conductive yarns with 0.74Ω/1~5cm were proposed and used for the integrated embroidery textile conductive wire for sensing. During experiments using the proposed embroidery textile conductive wire, measured resistance of thermistor according to the body temperature was correctly delivered to amplifier module, and showed feasible reliability of temperature sensing. As a wearable application, conductive yarns which takes forms of embroidery textile conductive wire would seems to be reliable as a conductive wire and could be replaced by the conductive metal wires.

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Section: 서 론 최근 It기술과 도전(導電) 섬유의 전도성(傳導性)을 융합 구현 한 텍스타일 직물전극을 적용함으로써 unclassified

A Design of Infant's Body Temperature Sensing System Based on Embroidery Textile Conductive Wire

Song¹,

Lee²,

Lee³

2016

The Transactions of The Korean Institute of Electrical Engineer

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“…These can measure cardiac activity only in a state where certain parts of the body and the electrodes are completely compressed and in contact [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15], which makes it difficult to acquire unconstrained and unconscious biosignals. To overcome this problem, some studies have been conducted on cardiac activity measurements using the noncontact capacitive method and magnetic-field-induction conductivity [16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Wearable Fabric Loop Sensor Based on Magnetic-Field-Induced Conductivity for Simultaneous Detection of Cardiac Activity and Respiration Signals

Cho

Yang

Lee

et al. 2022

Sensors

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In this study, a noncontact fabric loop sensor based on magnetic-field-induced conductivity, which can simultaneously detect cardiac activity and respiration signals, was developed and the effects of the sensor’s shape and measurement position on the sensing performance were analyzed. Fifteen male subjects in their twenties wore sleeveless shirts equipped with various types of fabric loop sensors (spiky, extrusion, and spiral), and the cardiac activity and respiratory signals were measured twice at positions P2, P4, and P6. The measurements were verified by comparing them against the reference electrocardiogram (ECG) and respiratory signals measured using BIOPAC® (MP150, ECG100B, RSP100C). The waveforms of the raw signal measured by the fabric loop sensor were filtered with a bandpass filter (1–20 Hz) and qualitatively compared with the ECG signal obtained from the Ag/AgCI electrode. Notwithstanding a slight difference in performance, the three fabric sensors could simultaneously detect cardiac activity and respiration signals at all measurement positions. In addition, it was verified through statistical analysis that the highest-quality signal was obtained at the measurement position of P4 or P6 using the spiral loop sensor.

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“…In this approach, a conductive fiber was also embroidered between the textile electrode and the system and used as an electrical wire. In addition, there is a method for measuring the user's ECG in a noncontact manner by attaching a capacitive ECG electrode to the outside of clothing [19]. As described, the clothing-type ECG systems do not need a sensor attachment to the body but are simply integrated with the clothing to be worn in the same manner, thus improving user convenience.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of a Waistband-Type Wireless Wearable Electrocardiogram Monitoring System Based on a Textile Electrode: Development and Usability Study

Gwon

Cho²,

Shin

2021

JMIR Mhealth Uhealth

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Background Electrocardiogram (ECG) monitoring in daily life is essential for effective management of cardiovascular disease, a leading cause of death. Wearable ECG measurement systems in the form of clothing have been proposed to replace Holter monitors used for clinical ECG monitoring; however, they have limitations in daily use because they compress the upper body and, in doing so, cause discomfort during wear. Objective The purpose of this study was to develop a wireless wearable ECG monitoring system that includes a textile ECG electrode that can be applied to the lining of pants and can be used in the same way that existing lower clothing is worn, without compression to the upper body. Methods A textile electrode with stretchable characteristics was fabricated by knitting a conductive yarn together with polyester-polyurethane fiber, which was then coated with silver compound; an ECG electrode was developed by placing it on an elastic band in a modified limb lead configuration. In addition, a system with analog-to-digital conversion, wireless communication, and a smartphone app was developed, allowing users to be able to check and store their own ECGs in real time. A signal processing algorithm was also developed to remove noise from the obtained signal and to calculate the heart rate. To evaluate the ECG and heart rate measurement performance of the developed module, a comparative evaluation with a commercial device was performed. ECGs were measured for 5 minutes each in standing, sitting, and lying positions; the mean absolute percentage errors of heart rates measured with both systems were then compared. Results The system was developed in the form of a belt buckle with a size of 53 × 45 × 12 mm (width × height × depth) and a weight of 23 g. In a qualitative evaluation, it was confirmed that the P-QRS-T waveform was clearly observed in ECGs obtained with the wearable system. From the results of the heart rate estimation, the developed system could track changes in heart rate as calculated by a commercial ECG measuring device; in addition, the mean absolute percentage errors of heart rates were 1.80%, 2.84%, and 2.48% in the standing, sitting, and lying positions, respectively. Conclusions The developed system was able to effectively measure ECG and calculate heart rate simply through being worn as existing clothing without upper body pressure. It is anticipated that general usability can be secured through further evaluation under more diverse conditions.

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An Analysis on the Effect of the Shape Features of the Textile Electrode on the Non-contact Type of Sensing of Cardiac Activity Based on the Magnetic-induced Conductivity Priciple

Cited by 8 publications

References 5 publications

A Design of Infant's Body Temperature Sensing System Based on Embroidery Textile Conductive Wire

A Design of Infant's Body Temperature Sensing System Based on Embroidery Textile Conductive Wire

Wearable Fabric Loop Sensor Based on Magnetic-Field-Induced Conductivity for Simultaneous Detection of Cardiac Activity and Respiration Signals

Feasibility of a Waistband-Type Wireless Wearable Electrocardiogram Monitoring System Based on a Textile Electrode: Development and Usability Study

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