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.
Original language | Undefined |
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Pages (from-to) | 78-85 |
Number of pages | 8 |
Journal | Journal of biomechanics |
Volume | 40 |
Issue number | 1/1 |
DOIs | |
Publication status | Published - 2007 |
Keywords
- Upper-extremities
- Kinematics
- Elbow
- EWI-8580
- Gyroscope
- METIS-241956
- IR-61440
- Accelerometer
- Inertial Sensors
- BSS-Biomechatronics and rehabilitation technology