지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
A threshold-based fall recognition algorithm using a tri-axial accelerometer and a bi-axial gyroscope mounted on the skin above the upper sternum was proposed to recognize fall-like activities of daily living (ADL) events. The output signals from the tri-axial accel-erometer and bi-axial gyroscope were obtained during eight falls and eleven ADL action sequences. The thresholds of signal vectormagnitude (SVM_Acc), angular velocity (ωres), and angular variation (θres) were calculated using MATLAB. When the measured valuesof SVM_Acc, ωres, and θres were compared to the threshold values (TH1, TH2, and TH3), fall-like ADL events could be distinguished from a fall. When SVM_Acc was larger than 2.5 g (TH1), ωres was larger than 1.75 rad/s (TH2), and θres was larger than 0.385 rad (TH3), eight falls and eleven ADL action sequences were recognized as falls. When at least one of these three conditions was not satisfied,the action sequences were recognized as ADL. Fall-like ADL events such as jogging and jumping up (or down) have posed a problemin distinguishing ADL events from an actual fall. When the measured values of SVM_Acc, ωres, and θres were applied to the sequentialprocessing algorithm proposed in this study, the sensitivity was determined to be 100% for the eight fall action sequences and the spec- ificity was determined to be 100% for the eleven ADL action sequences.
목차
등록된 정보가 없습니다.
참고문헌 (19)
참고문헌 신청
A. K. Bourke / 2007 / Evaluation of threshold-based tri-axial accelerometer fall detection algorithm / Gait & Posture 26 (2) : 194 ~ 199
A. K. Bourke / 2008 / A threshold-based falldetection algorithm using a bi-axial gyroscope sensor / Med. Eng. Phys 30 (1) : 84 ~ 90
B. Najafi / 2002 / Measurement of stand-sit and sit-stand transitions using a miniature gyroscope and its application in fall risk evaluation in the elderly / IEEE Trans. Bio
B. Najafi / 2003 / Ambulatory system for human motion analysis using a kinematic sensor : monitoring of daily physical activity in the elderly / IEEE Trans. Biomed. Eng 50 (
C. Rougier / 2011 / Robust video surveillance for fall detection based on human shape deformation / IEEE Transactions on Circuits and Systems for Video Technology 21 (5) : 61
A. K. Bourke / 2008 / A threshold-based falldetection algorithm using a bi-axial gyroscope sensor / Med. Eng. Phys 30 (1) : 84 ~ 90
B. Najafi / 2002 / Measurement of stand-sit and sit-stand transitions using a miniature gyroscope and its application in fall risk evaluation in the elderly / IEEE Trans. Bio
B. Najafi / 2003 / Ambulatory system for human motion analysis using a kinematic sensor : monitoring of daily physical activity in the elderly / IEEE Trans. Biomed. Eng 50 (
C. Rougier / 2011 / Robust video surveillance for fall detection based on human shape deformation / IEEE Transactions on Circuits and Systems for Video Technology 21 (5) : 61
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