NDLI: Ambulatory measurement of ground reaction forces

Content Provider	IEEE Xplore Digital Library
Author	Veltink, P.H. Liedtke, C. Droog, E. van der Kooij, H.
Copyright Year	2001
Abstract	The measurement of ground reaction forces is important in the biomechanical analysis of gait and other motor activities. Many applications require full ambulatory measurement of these forces, but this is not supported by current measurement systems. We propose the use of two six-degrees-of-freedom force and moment sensors under each shoe, which enables the ambulatory measurement of ground reaction forces and centers of pressure (CoP). The feasibility of this method is illustrated by experimental results in a healthy subject, using a force plate as a reference. The ground reaction forces and CoP recordings show good correspondence when they are evaluated for forces above 40 N and when it is simply assumed that the sensors are flat on the ground when they are loaded. The root mean square (rms) difference of the magnitude of the ground reaction force over 12 gait trials was 15/spl plusmn/2 N, corresponding to 1.9/spl plusmn/0.3% of the maximum ground reaction force magnitude. The rms difference of the horizontal component of the ground reaction force was 3/spl plusmn/2 N, corresponding to 0.4/spl plusmn/0.2% of the maximum ground reaction force magnitude and to 2/spl plusmn/1% of the maximum of the horizontal component of the ground reaction force. The rms distance between both CoP recordings is 2.9/spl plusmn/0.4 mm, corresponding to 1.1/spl plusmn/0.2% of the length of the shoe, when the trajectories are optimally aligned.
Sponsorship	IEEE Engineering in Medicine and Biology Society
Page Count	5
File Size	566404
Starting Page	423
Ending Page	427
File Format	PDF
ISSN	15344320
Volume Number	13
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Force measurement Biomedical measurements Force sensors Laboratories Current measurement Footwear Legged locomotion Biosensors Pressure measurement Root mean square sensing Biomechanics center of pressure (CoP) ground reaction force instrumentation legged locomotion
Content Type	Text
Resource Type	Article
Subject	Neuroscience Rehabilitation Internal Medicine Biomedical Engineering Computer Science Applications

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