Estimating Ground Inclination Using Strain Sensors with Fourier Series Representation
An embedded measurement system for foot orthosis during gait is proposed. Strain gauge sensors were mounted on a foot orthosis to give information about strain in the sagittal plane. The ankle angle of the orthosis was fixed and strain characteristics were therefore changed when walking on slopes. W...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2010-01-01
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| Series: | Journal of Robotics |
| Online Access: | http://dx.doi.org/10.1155/2010/465618 |
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| Summary: | An embedded measurement system for foot orthosis
during gait is proposed. Strain gauge sensors were mounted on
a foot orthosis to give information about strain in the sagittal
plane. The ankle angle of the orthosis was fixed and strain
characteristics were therefore changed when walking on slopes.
With a Fourier series representation of the strain during a gait
cycle, ground angle at different walking speeds and inclinations
could be estimated with similar accuracy as previous studies
using kinematically based estimators. Furthermore, if the angle
of the mechanical foot ankle was changed, the sensing technique
still could estimate ground angle without need for recalibration
as opposed to kinematical sensors. This indicates that embedded
strain sensors can be used for online control of future orthoses
with inclination adaptation. Also, there would be no need to
recalibrate the sensing system when changing shoes with different
heel heights. |
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| ISSN: | 1687-9600 1687-9619 |