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Design of a Portable Activity Monitoring System  

Lee, Seung-Hyung (연세대 보건과학대학 의공학과)
Park, Ho-Dong (연세대 보건과학대학 의공학과)
Yoon, Hyung-Ro (연세대 보건과학대학 의공학과)
Lee, Kyung-Joung (연세대 보건과학대학 의공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers D / v.51, no.1, 2002 , pp. 32-38 More about this Journal
Abstract
This paper describes a development of a portable physical activity monitoring system using two accelerometers to quantify physical activity. The system hardware consists of two piezoresistive accelerometers, amplifiers with gain of 30, lowpass filters with cut-off frequency of 15Hz, offset control circuits, one-chip microcontroller and flash memory card. In order to evaluate the performance of the system we acquired 3 channel data at 32 sample/sec from body-fixed accelerometers in chest and right upper leg. And then the acquired data were processed by MatLab on personal computer. We tried to distinguish not only fundamental actions which are steady-state activities such as standing, sitting, and lying but also dynamic activities with walking, up a stairway, down a stairway, and running. Five subjects participated the evaluation process which compare the video data with the measured data. As a result, the activity classification rate of 90.6% on average was obtained. Overall results showed that the steady-state activities could be classified from the low component of 3-axis acceleration signal and dynamic activities could be distinguished from frequency analysis using wavelet transform and FFT. Finally, we could find that this system can be applied to acquire and analyze the static and dynamic physical activity data.
Keywords
Activiy monitoring system; Physica activity; Accelerometer; Wavelet transform;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Henry J. Montoye, Han C. G. Kemper, Wim H. M. Saris, Richard A. Washburn, 'Measuring physical activity and energy expenditure', Human Kinetics, pp.72-96, 1996
2 K. Aminian, Ph. Robert, E. E. Buchser, B. Rutschmann, D. Hayoz, M. Depairon, 'Physical activity monitoring based on accelerometry: validation and comparison with video observation', Medical & Biological Engineering & Computing, Vol.37, pp.304-308, 1999   DOI
3 Sieberen P. van der Werf, Judith B. Prins, Jan H. M. M. Vercoulen, Jos W. M. von der Meer, Gijs Bleijenberg, 'Identifying. physical activity patterns in chronic fatigue syndrome using actigraphic assessment', Journal of Psychosomatic Research, Vol.49, pp.373- 379, 2000   DOI   ScienceOn
4 Kim L. Coleman, Douglas G. Smith, David A. Boone, Aaron W. Joseph, Michael A. del Aguila, . 'Step activity monitor: long-term, continuous recording of ambulatory function', Journal of Rehabilitation Research and, Development, Vol.36, NO.1, 1999
5 F. Foerster, M. Smeja, J. Fahrenberg, 'Detection of posture and motion by accelerometry: a validation study in ambulatory monitoring', Computers in Human Behavior, Vol.15, pp.571-583, 1999   DOI   ScienceOn
6 H. G. van Steenis, J. H. M. Tulen, 'The effects of physical activitys on cardivascular variability in ambulatory situations', Proceedings-19th International Conference-IEEE/EMBS, pp.105-108, 1997   DOI
7 Gerwin A. L. Meijer, Klaas R. Westerterp, Francois M. H. Verhoeven, Hans B. M. Koper, 'Methods to assess physical activity with special reference to motion sensors and accelerometers', IEEE Transactions on Biomedical Engineering, Vol.38, pp.221-229, 1991   DOI   ScienceOn
8 Carlijn V.C. Bouten, Karel T. M. Koekkoek, Maarten Verduin, Rens Kodde, Jan D. Janssen, 'A triaxial accelerometer and portable data processing unit for the assessment of daily physical activity', IEEE Transactions on Biomedical Engineering, Vol.44, pp.136-147, 1997   DOI   ScienceOn
9 Hendrika J. G. van dem Berg-Emons, Johammes B. J. Bussmann, Aggie H. M. M. Balk, Henk J. Stam, 'Validity of ambulatory accelerometry to quantify physical activity in heart failure', Scand J Rehab Med, Vol.32, pp.187-192, 2000   DOI
10 B. Najafi, K. Aminian, F. Loew, Y. Blanc, 'An ambulatory system. for physical activity monitoring in elderly', IEEE-EMBS Special Topic Conference on Microtechnologies in Medicine & Biology, pp.562-566, 2000   DOI
11 T. Tamura, .T. Fujimoto, H. Sakaki, Y. Higashi, T. Yoshida, T. Togawa, 'A silid-state ambulatory physical activity monitor and its application to measuring daily activity of the elderly', Jornal of Medical Engineering & Technology, Vol.21, pp.96-105, 1997   ScienceOn