NDLI: Human gait monitoring using body-worn inertial sensors and kinematic modelling

Content Provider	IEEE Xplore Digital Library
Author	Ahmadi, A. Destelle, F. Monaghan, D. Moran, K. O'Connor, N.E. Unzueta, L. Linaza, M.T.
Copyright Year	2015
Description	Author affiliation: Vicomtech-IK4, Donostia, Spain (Unzueta, L.; Linaza, M.T.) \|\| Insight Centre for Data Analytics, Dublin City Univ., Dublin, Ireland (Ahmadi, A.; Destelle, F.; Monaghan, D.; Moran, K.; O'Connor, N.E.)
Abstract	In this paper, we present a low-cost computationally efficient method to accurately assess Gait by monitoring the 3D trajectory of the lower limb (i.e. 3 segments - foot, tibia and thigh, and 2 joints - ankle and knee). Our method utilises a network of miniaturized wireless inertial sensors, coupled with a suite of sophisticated real-time analysis algorithms and can operate in any unconstrained environment. Firstly, we adopt a modified computationally-efficient, highly accurate and realtime gradient descent algorithm to obtain the 3D orientation of each of the 3 segments. Secondly, by utilising the foot sensor, we successfully detect the stance phase of the human gait cycle, which allows us to obtain drift-free velocity and the 3D position of the foot during functional phases of a gait cycle (i.e. heel strike to heel strike). Thirdly, by setting the foot segment as the root node we calculate the 3D orientation and position of the other 2 segments as well as the ankle and knee joints. Finally, we employ a customised kinematic model adjustment technique to ensure that the motion is coherent with human biomechanical behaviour of the leg. Our method is low-cost, is robust to measurement drift and can accurately monitor human gait outside the lab in any unconstrained environment.
Sponsorship	IEEE
Starting Page	1
Ending Page	4
File Size	1747878
Page Count	4
File Format	PDF
e-ISBN	9781479982035
DOI	10.1109/ICSENS.2015.7370310
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-11-01
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sensors Foot Three-dimensional displays Thigh Knee Hip Kinematics
Content Type	Text
Resource Type	Article

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