Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (09): 75-82.doi: 10.13475/j.fzxb.20180804308

• Textile Engineering • Previous Articles     Next Articles

Action mechanism of wearing pressure on electrocardiogram monitoring of woven fabric electrodes

DONG Ke, ZHANG Ling, FAN Jiaxuan, LI Mengjie, MEI Lin, XIAO Xueliang()   

  1. Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
  • Received:2018-08-13 Revised:2019-05-06 Online:2019-09-15 Published:2019-09-23
  • Contact: XIAO Xueliang E-mail:xiao_xueliang@jiangnan.edu.cn

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Abstract:

In order to explore the effect of wear pressure on the quality of electrocardiogram(ECG) signals collected by textile structure ECG electrodes, four conductive fabric electrodes based on plain and satin structure were developed using silver-plated nylon tow and polyester, the performance of the fabric electrode was evaluated from skin-electrode contact resistance, comfort and the relationship between fabric resistance and wear pressure. The ECG signal acquisition performance of four different fabric electrodes under different wearing pressures(2,5,10 kPa) was also tested. The experimental results show that fabric electrodes with different structures are different in ECG signal acquisition capability and comfort under different wearing pressures. As the wear pressure increases, the surface resistance of the conductive fabric first decreases and then stabilizes, and the ECG signal quality is higher. The pure conductive satin structure fabric has better air permeability and moisture permeability, and the comfort ability is better than that of the plain structure fabric. The plain structure electrode shows better ECG signal quality under comfortable wear pressure (2, 5 kPa).

Key words: fabric electrode, electrocardiogram signal, wearable pressure, comfortability

CLC Number: 

  • TS101.2

Fig.1

SEM images of silver-coated nylon filament. (a) Silver-coated nylon tow; (b) Cross seciton of silver-coated nylon filament; (c) Conductive nylon filament with silver-coated layer"

Tab.1

Specifications of conductive woven fabrics"

织物
编号		 组织结构 组成 经向密度/
(根·(10 cm)-1)		 纬向密度
(根·(10 cm)-1)
经纱 纬纱
PCN 平纹 镀银锦纶丝 涤纶 394 315
PCC 平纹 镀银锦纶丝 镀银锦纶丝 394 315
SCN 五枚三飞经面缎纹 镀银锦纶丝 涤纶 394 315
SCC 五枚三飞经面缎纹 镀银锦纶丝 镀银锦纶丝 394 315

Fig.2

Fabric sample"

Fig.3

Principle of skin-electrode impedance measurement"

Fig.4

Test of surface pressure and surface resistance of fabric; (a) Test model diagram;(b) Fabric surface pressure and resistance test"

Fig.5

Wearable ECG acquisition system. (a) Wearable ECG signal monitoring system schematic diagram; (b) Belt wearable ECG collection clothing"

Tab.2

Tested conductive fabric performance"

织物
编号		 透气性/
(mm·
s-1)		 透湿性/
(g·m-2
(24 h)-1)		 织物
方阻/
(Ω·□-1)		 皮肤-电极
界面阻抗/
MΩ
PCN 623.2 660.4 12.810 0.645
PCC 717.7 990.6 0.122 0.225
SCN 1 834.4 566.0 5.010 0.241
SCC 2 285.0 896.2 0.118 0.110

Fig.6

Relationship between pressure and resistance of conductive fabric samples. (a) Semi-conductive fabrics;(b) Pure conductive fabrics"

Fig.7

ECG signals collected by fabric electrodes prepared from conductive fabrics"

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