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helmet-based physiological signal monitoring system

Cited 32 time in Web of Science Cited 47 time in Scopus
Authors
Kim, Youn Sung; Baek, Hyun Jae; Kim, Jung Soo; Lee, Haet Bit; Choi, Jong Min; Park, Kwang Suk
Issue Date
2008-11-12
Publisher
Springer Verlag
Citation
European Journal of Applied Physiology 105(3):365-372
Keywords
helmetdry electrodesECGEOGEEGalpha wavedrowsiness
Description
This paper describes helmet-based wearable biosignal monitoring system that can measure ECG, EOG, EEG alpha wave and shows its application for detection of drowsiness.
authors' final draft
Abstract
A helmet-based system that was able to monitor the drowsiness of a soldier was developed. The helmet system monitored the electrocardiogram, electrooculogram and electroencephalogram (alpha waves) without constraints. Six dry electrodes were mounted at five locations on the helmet: both temporal sides, forehead region and upper and lower jaw strips. The electrodes were connected to an amplifier that transferred signals to a laptop computer via Bluetooth wireless communication. The system was validated by comparing the signal quality with conventional recording methods. Data were acquired from three healthy male volunteers for 12 min twice a day whilst they were sitting in a chair wearing the sensor-installed helmet. Experimental results showed that physiological signals for the helmet user were measured with acceptable quality without any intrusions on physical activities. The helmet system discriminated between the alert and drowsiness states by detecting blinking and heart rate variability (HRV) parameters extracted from ECG. Blinking duration and eye reopening time were increased during the sleepiness state compared to the alert state. Also, positive peak values of the sleepiness state were much higher, and the negative peaks were much lower than that of the alert state. The LF/HF ratio also decreased during drowsiness. This study shows the feasibility for using this helmet system: the subjects’ health status and mental states could be monitored without constraints whilst they were working.
ISSN
1439-6319
1439-6327
Language
English
URI
http://hdl.handle.net/10371/1962
DOI
https://doi.org/10.1007/s00421-008-0912-6
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College of Engineering/Engineering Practice School (공과대학/대학원)Program in Bioengineering (협동과정-바이오엔지니어링전공)Journal Papers (저널논문_협동과정-바이오엔지니어링전공)
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