Ambulatory measurement of arm orientation


Luinge, H.J. and Veltink, P.H. and Baten, C.T.M. (2007) Ambulatory measurement of arm orientation. Journal of Biomechanics, 40 (1). pp. 78-85. ISSN 0021-9290

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Abstract:In order to evaluate the impact of neuromuscular disorders affecting the upper extremities, the functional use of the arm need to be evaluated during daily activities. A system suitable for measuring arm kinematics should be ambulatory and not interfere with activities of daily living. A measurement system based on miniature accelerometers and gyroscopes is adequate because the sensors are small and do not suffer from line of sight problems. A disadvantage of such sensors is the cumulative drift around the vertical and the problems with aligning the sensor with the segment.

A method that uses constraints in the elbow to measure the orientation of the lower arm with respect to the upper arm is described. This requires a calibration method to determine the exact orientation of each of the sensors with respect to the segment. Some preliminary measurements were analyzed and they indicated a strong reduction in orientation error around the vertical. It seemed that the accuracy of the method is limited by the accuracy of the sensor to segment calibration.
Item Type:Article
Copyright:© 2007 Elsevier Science
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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