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A Design of an Algorithm for Analysis of Activity Using 3-Axis Accelerometer  

이승형 (연세대 의공학과)
임예택 (연세대 의공학)
이경중 (연세대 의공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers D / v.53, no.5, 2004 , pp. 361-367 More about this Journal
Abstract
This paper describes design of an algorithm for analyzing human activity using body-fixed 3-axis accelerometer in the small of the back. In the first step, we distinguish static and dynamic activity period using AC signal analysis. Then five postures were classified by applying the threshold in DC signal corresponding to the static activity period. Also, after comparison of average power and taking negative peak signal in the dynamic activity period, the four dynamic activities were classified by adaptive threshold method. To evaluate the performance of the proposed algorithm, the measured signals obtained from six subjects were applied to the proposed algorithm and the results were compared with the simultaneously measured video data. As a result, the activity classification rate of 95.7％ on average was obtained. Overall results show that the proposed classification algorithm has a possibility to be used to analyze the static and dynamic physical activity.
Keywords
Physical activity; 3-axis accelerometer; adaptive threshold method;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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