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정전 용량성 결합 전극을 이용한 웨어러블 심전도 측정 시스템 설계에 관한 연구
이재호(Jae-Ho Lee),이영재(Young-Jae Lee),이강휘(Kang-Hwi Lee),강승진(Seng-Jin Kang),김경남(Kyeung-Nam Kim),박희정(Hee-Jung Park),이정환(Jeong-Whan Lee) 대한전기학회 2014 전기학회논문지 Vol.63 No.10
In this study, a new type of electrode device is implemented to measure the capacitance energy and interpret it as the ECG (Electrocardiogram) data. The main idea of this new electrode system is to estimate the capacitance on the skin by assembling a capacitive-coupled circuits and translate into the ECG signal. To measure the coupling energy and estimate the aquired data in terms of heart activity, the capacitive-coupled electrode is garmented with fabrics in the form of a chest band or a vest jacket. To compare the ECG data from the capacitive-coupled electrode with the conventional electrode(Ag-AgCl) system, the corelation coefficient between two signals is computed as 0.9517. Thus, we can conclude the fact that capacitive-coupled electrode system can measure a person"s heart activity without any contact to his or her skin and can the interpreted as the ECG data
수정된 바이폴라 전극을 갖는 착용형 심장활동 모니터링 시스템 구현 및 임상 심전도와의 상관관계 분석
李康輝(Kang-Hwi Lee),李定桓(Jeong-Whan Lee),李映在(Young-Jae Lee),金敬燮(Kyeong-Seop Kim),梁熙卿(Heui-Koung Yang),申建洙(Kun-Su Shin),李明鎬(Myoung-Ho Lee) 대한전기학회 2008 전기학회논문지 Vol.57 No.6
Wearable physiological signal monitoring systems are regarded as an important sensing unit platforms in ubiquitous/mobile healthcare application. In this paper, we suggested the modified bipolar electrodes implemented on the portable heart activity monitoring system, which minimized the distance of electrodes formed on a attachable pad. The proposed electrode configuration is useful in mobile measurement environments, but has a disadvantage of reduced amplitude of the heart action potential. In order to overcome the shortcoming of the suggested electrode configuration, we implemented the amplifying circuit to increase the signal-gain and decrease the artifacts. For evaluations, we analyzed the specificity of measured cardiography using the proposed electrodes through the comparing of heart activity monitoring system with standard clinical ECG(lead2) by pearson correlation coefficients. The result showed that the average correlation coefficient is 0.903±0.036, 0.873±0.072 at V3, V4 chest lead position, respectively. Thus, the modified bipolar electrode is quite suitable to monitor the electrical activity of the heart in the situation of the mobile environment, and could be considered having high similarity with standard clinical ECG.