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Gait-Event Detection using an Accelerometer for the Paralyzed Patients  

Kong, Se-Jin (건국대 의료생명대 의학공학부)
Kim, Chul-Seung (건국대 의료생명대 의학공학부)
Moon, Ki-Wook (건국대 의료생명대 의학공학부)
Eom, Gwang-Moon (건국대 의료생명대 의학공학부)
Tack, Gye-Rae (건국대 의료생명대 의학공학부)
Kim, Kyeong-Seop (건국대 의료생명대 의학공학부)
Lee, Jeong-Whan (건국대 의료생명대 의학공학부)
Lee, Young-Hee (연세대 원주의과대 재활의학교실)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.56, no.5, 2007 , pp. 990-992 More about this Journal
Abstract
The purpose of this study is to develop a practical gait-event detection system which is necessary for the FES (functional electrical stimulation) control of locomotion in paralyzed patients. The system is comprised of a sensor board and an event recognition algorithm. We focused on the practicality improvement of the system through 1) using accelerometer to get the angle of shank and dispensing with the foot-switches having limitation in indoor or barefoot usage and 2) using a rule-base instead of threshold to determine the heel-off/heel-strike events corresponding the stimulation on/off timing. The sensor signals are transmitted through RF communication and gait-events was detected using the peaks in shank angle. The system could detect two critical gait-events in all five paralyzed patients. The standard deviation of the gait events time from the peaks were smaller when 1.5Hz cutoff frequency was used in the derivation of the shank angle from the acceleration signals.
Keywords
gait-events; FES; rule-base; shank angle; accelerometer;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 0
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