现代纺织技术2025，Vol.33Issue(4)：113-121,9.DOI:10.19398/j.att.202406001
不同制备工艺对织物电极心电信号质量的影响
Effect of different manufacturing processes on ECG signal quality of textile electrodes
摘要
Abstract
Cardiovascular disease(CVD)is a leading cause to mortality in the population,accounting for more than 47%of deaths and posing a serious threat to people's health.Electrocardiography(ECG),as the primary method for detecting the cardiac electrical activity,plays a pivotal role in the prediction and diagnosis of CVD.Conventional ECG systems use disposable Ag/AgCl gel wet electrodes,and while these electrodes are capable of acquiring better bioelectrical signals,the drying up of the gel and the irritation with the skin during long-term use seriously affects patients'willingness to use them.Fabric dry electrodes,by virtue of excellent conformability and comfort,as well as their good electrical conductivity and mechanical stability,have a wide range of applications in wearable ECG monitoring.According to the different preparation processes,fabric electrodes can be mainly categorized into woven fabric electrodes,knitted fabric electrodes and embroidered electrodes. However,the factors affecting the quality of ECG signals involve not only the preparation process of fabric electrodes,but also the contact impedance between the electrodes and the skin as well as the adaptability under dynamic conditions.To investigate the effects of different preparation processes on the quality of ECG signals from fabric electrodes,we utilized silver/nylon yarn as the primary conductive material and prepared eight different types of fabrics through three distinct processes.These fabrics included three woven fabrics,two knitted fabrics,and three embroidered fabrics.By assessing their surface conductivity,we identified the woven fabric(W3),knitted fabric(K2),and embroidered fabric(E3)types that exhibited the best conductivity.For the woven fabrics,the resistance values increased with the distance between the two test points and were approximately equal when the test points were equidistant.The magnitude of the surface resistance of knitted fabrics was closely related to the coil density.The conductivity of embroidered fabrics was affected by the combination(intersection density)of stitch direction and stitch density,etc.We prepared these three fabrics as cardiofabric electrodes and tested them by electrode-copper-plate low-frequency impedance and electrode-skin contact impedance,and concluded that longer floating-length wires,denser coil structure,higher stitch intersection density,and a larger contact area were important factors for lowering the impedance. After that,we prepared woven,knitted and embroidered fabric electrocardiographic tapes and comprehensively analyzed the factors affecting the quality of dynamic and static electrocardiographic signals,including structural tightness,contact uniformity and dynamic adaptability.The results showed that different preparation processes and fabric structures significantly affected the conductivity of the electrodes and the quality of contact with the skin,which in turn affected the accuracy and stability of the ECG signals.E3 outperformed both W3 and K2 electrodes in terms of structural compactness,contact uniformity,and dynamic adaptability,and was able to acquire the highest quality ECG signals in both dynamic and static states,with the static Pearson correlation coefficient of 0.94 and the dynamic one above 0.91.关键词
织物电极/心电带/皮肤阻抗/心电图/皮尔逊相关系数Key words
fabric electrodes/ECG bands/skin impedance/ECG/Pearson correlation coefficient分类
轻工纺织引用本文复制引用
周金利,郑俊杰,刘思琪,王晨晓,樊蒙召,杨朝然,李云飞..不同制备工艺对织物电极心电信号质量的影响[J].现代纺织技术,2025,33(4):113-121,9.基金项目
中国纺织工业联合会科技指导性项目(2021060) （2021060）
中原工学院学科青年硕导培养计划项目(SD202216) （SD202216）
中原工学院研究生科研创新计划项目(YKY2024ZK02) （YKY2024ZK02）
中原工学院自然科学基金项目(K2025YB017) （K2025YB017）
