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Suppression of Artifacts in Biomeasurement System by Pneumatic Filtering

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2 Author(s)
Kurihara, Y. ; Dept. of Comput. & Inf. Sci., Seikei Univ., Tokyo, Japan ; Watanabe, K.

The pneumatic biomeasurement system is a noninvasive, constraint-free method for monitoring the heartbeat, respiration and other vital signs of a person in bed. Body microvibrations transmitted through the bed cushion act on the air in a thin air mattress under the cushion. Changes in air pressure synchronized with the microvibrations are detected by a pressure sensor. However, the high sensitivity of the sensor results in output saturated with body motion artifacts. This paper describes a novel method for pneumatic filtering of these artifacts. A theoretical model was developed as the basis for designing a pneumatic filter to reduce body motion artifacts. The validity of the proposed high-pass filtering method was examined through experiments.

Published in:

Sensors Journal, IEEE  (Volume:12 ,  Issue: 3 )