柔性非接触心电阵列电极设计与压力影响分析  

Design of a flexible non-contact ECG array electrodes and effect analysis on pressure

作　　者：吴刚 冯宝亮 刘箴[1] 左国坤[2,3] 施长城 Wu Gang;Feng Baoiang;Liu Zhen;Zuo Guokun;Shi Changcheng(Faculty of Electrical Engineering&Computer Science,Ningbo University,Ningbo 315211,China;Ningbo Institute of Materials Technology&Engineering,Chinese Academy of Sciences,Ningbo 315201,China;Ningbo Cixi Institute of Biomedical Engineering,Ningbo Institute of Materials Technology&Engineering,Chinese Academy of Sciences,Ningbo 315300,China)

机构地区：[1]宁波大学信息科学与工程学院,宁波315211 [2]中国科学院宁波材料技术与工程研究所,宁波315201 [3]宁波慈溪生物医学工程研究所,宁波315300

出　　处：《仪器仪表学报》2023年第12期150-160,共11页Chinese Journal of Scientific Instrument

基　　金：中国科学院宁波材料技术与工程研究所所长基金(2021SZKY0205)项目资助。

摘　　要：非接触式心电传感技术在长期睡眠心电监测领域展现了优异的应用前景,其中阵列式非接触心电传感技术取得了较好的发展,然而,该技术所用电极多为刚性的印制电路板(PCB),舒适性较差。同时,人体压力分布对该技术所获心电信号质量的影响规律尚未可知。针对这些不足,本研究设计了一种基于柔性印刷电路(FPC)的阵列式非接触睡眠心电监测系统。通过系统验证,证明了该系统所获取心电信号一致性较高且平均信噪比>38 dB。随后通过人体试验分析了人体压力对心电信号质量的影响。结果表明,当心电检测输入端所受压力<9 mmHg时,获得低信噪比心电信号的概率P高于54.17%;反之,则P低于5.94%,证明人体压力是影响电容耦合心电信号质量的关键因素之一。The non-contact electrocardiogram(ECG)sensing technology has a promising application in the field of long-term sleeping ECG monitoring.The non-contact ECG sensing technology based on array electrodes has made good progress.However,the current non-contact ECG sensing electrodes based on array electrodes are mostly manufactured by using the hard printed circuit board technology,which has low comfort.Meanwhile,the relationship between the human body pressure distribution and the signal quality of non-contact ECG sensing based on array electrodes is not studied in this aspect based on our best knowledge.To address those issues,this study develops an arrayed non-contact ECG sensing electrode based on flexible printed circuit(FPC).The experimental results show that the ECG signals obtained from the proposed system are high,and the averaged signal-to-noise ratio is larger than 38 dB.Moreover,the effect of pressure distribution of human back on the ECG signal quality is analyzed by conducting the human trials.The results demonstrate that the obtained ECG signal quality is relatively low when the electrode unit with human body pressure is lower than 9 mmHg used as one of the positive or negative ECG signal input units.The probability for obtaining ECG signals with lower quality is higher than 54.17%.When the unit pressure is higher than 9 mmHg,the probability for obtaining ECG signals with lower quality is lower than 5.94%.It proves that the unit pressure is one of the key factors that can affect the quality of capacitive ECG signals.

关 键 词：非接触心电 阵列式电极 人体睡眠压力分布 睡眠心电监测 柔性印刷电路 

分 类 号：TH776[机械工程—仪器科学与技术]