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연구논문 : 비접촉식 심장활동 모니터링 기능 의복형 웨어러블 시스템의 모듈 효과 탐색
구혜란 ( Hye Ran Koo ),이영재 ( Young Jae Lee ),지선옥 ( Sunok Gi ),이승표 ( Seung Pyo Lee ),김경남 ( Kyeng Nam Kim ),강승진 ( Seung Jin Kang ),이정환 ( Jeong Whan Lee ),이주현 ( Joo Hyeon Lee ) 한국의류학회 2015 한국의류학회지 Vol.39 No.3
Various forms of wearable bio-signal monitoring systems have been developed recently. Acquisition of stable bio-signal data for health care purposes needs to be unconscious and continuous without hindrance to the users`` daily activities. The garment type is a suitable form of a wearable bio-signal monitoring system; however, motion artifacts caused by body movement degrade the signal quality during the measurement of bio-signals. It is crucial to stabilize the electrode position to reduce motion artifacts generated when in motion. The problems with motion artifacts remain unresolved despite their significant effect on bio-signal monitoring. This research creates a foundation for the design of garment-type wearable systems for everyday use by finding a method to reduce motion artifacts through modular design. Two distinct garment-type wearable systems (tee-shirt with a motion artifact-reducing module (MARM) and tee-shirt without a MARM) were designed to compare the effects of modular design on the measurement of heart activity in terms of electrode position displacement, signal quality index value, and morphological quality. The tee-shirt with MARM showed superior properties and yielded higher quality signals than the tee-shirt without MARM. In addition, the tee-shirt with MARM showed a better repeatability of the heart activity signals. Therefore, a garment design with MARM is an efficient way to acquire stable bio-signals while in motion.