A new approach to accurate measurement of uniaxial joint angles based on a combination of accelerometers and gyroscopes.

Details

Serval ID
serval:BIB_732EA5241368
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
A new approach to accurate measurement of uniaxial joint angles based on a combination of accelerometers and gyroscopes.
Journal
IEEE transactions on bio-medical engineering
Author(s)
Dejnabadi H., Jolles B.M., Aminian K.
ISSN
0018-9294
Publication state
Published
Issued date
2005
Peer-reviewed
Oui
Volume
52
Number
8
Pages
1478-84
Language
english
Notes
Publication types: Clinical Trial ; Journal Article ; Research Support, Non-U.S. Gov't - Publication Status: ppublish
Abstract
A new method of measuring joint angle using a combination of accelerometers and gyroscopes is presented. The method proposes a minimal sensor configuration with one sensor module mounted on each segment. The model is based on estimating the acceleration of the joint center of rotation by placing a pair of virtual sensors on the adjacent segments at the center of rotation. In the proposed technique, joint angles are found without the need for integration, so absolute angles can be obtained which are free from any source of drift. The model considers anatomical aspects and is personalized for each subject prior to each measurement. The method was validated by measuring knee flexion-extension angles of eight subjects, walking at three different speeds, and comparing the results with a reference motion measurement system. The results are very close to those of the reference system presenting very small errors (rms = 1.3, mean = 0.2, SD = 1.1 deg) and excellent correlation coefficients (0.997). The algorithm is able to provide joint angles in real-time, and ready for use in gait analysis. Technically, the system is portable, easily mountable, and can be used for long term monitoring without hindrance to natural activities.
Keywords
Acceleration, Adult, Aged, Computer Simulation, Diagnosis, Computer-Assisted, Female, Humans, Knee Joint, Male, Middle Aged, Models, Biological, Movement, Range of Motion, Articular, Reproducibility of Results, Sensitivity and Specificity, Transducers
Pubmed
Web of science
Create date
28/01/2008 12:19
Last modification date
20/08/2019 14:31
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