Journal of Information Technology Services (한국IT서비스학회지)

Korea Society of IT Services (한국IT서비스학회)
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Real-time Fall Detection with a Smartphone

스마트폰을 이용한 실시간 낙상 감지

  • 황수영 (전북대학교 헬스케어공학과) ;
  • 유문호 (전북대학교 바이오메디컬공학부) ;
  • 김제남 (전북대학교 헬스케어공학과) ;
  • 양윤석 (전북대학교 바이오메디컬공학부)
  • Received : 2012.09.14
  • Accepted : 2012.11.18
  • Published : 2012.11.30
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Abstract

In this study, a real-time fall detection system based on a smartphone equipped with three-axis accelerometer and magnetometer was proposed and evaluated. The proposed system provides a service that detects falls in real time, triggers alarm sound, and sends emergency SMS(Short Message Service) if the alarm is not deactivated within a predefined time. When both of the acceleration magnitude and angle displacement of the smartphone attached to waist belt are greater than predefined thresholds, it is detected as a fall. The proposed system was evaluated against activities of daily living(walking, jogging, sitting down, standing up, ascending stairs, and descending stairs) and unintended falls induced by a proprietary pneumatic-powered mattress. With the thresholds of acceleration magnitude 1.7g and angle displacement $80^{\circ}$, it showed 96.5% accuracy to detect the falls while all the activities of daily living were not detected as fall.

Keywords

References

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