The Transactions of the Korean Institute of Electrical Engineers D (대한전기학회논문지:시스템및제어부문D)

The Korean Institute of Electrical Engineers (대한전기학회)
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Design of a Portable Activity Monitoring System

휴대용 활동 상태 모니터링 시스템의 설계

  • 이승형 (연세대 보건과학대학 의공학과) ;
  • 박호동 (연세대 보건과학대학 의공학과) ;
  • 윤형로 (연세대 보건과학대학 의공학과) ;
  • 이경중 (연세대 보건과학대학 의공학과)
  • Published : 2002.01.01
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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

References

  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. 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
  3. 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 https://doi.org/10.1016/S0747-5632(99)00037-0
  4. 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 https://doi.org/10.1109/IEMBS.1997.754476
  5. 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 https://doi.org/10.1109/10.554760
  6. 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 https://doi.org/10.1007/BF02513304
  7. 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 https://doi.org/10.1080/003655000750060940
  8. 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 https://doi.org/10.1109/MMB.2000.893847
  9. 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 https://doi.org/10.1109/10.133202
  10. 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
  11. 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 https://doi.org/10.1016/S0022-3999(00)00197-5