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• W1964422552 abstract "An approach using virtual-sensor difference and physical-sensor difference based algorithm to visually confirm lower limb posture was proposed and a wearable sensor system was developed. To explicate the lower limb posture, flexion/extension (FE) and abduction/adduction (AA) hip joint angles and FE knee joint angles were estimated for orientations of the lower limb segments, and the knee and ankle joint trajectories were obtained with the segment orientation and length for positions of the lower limb joints. In the wearable sensor system, an accelerometer on the hip joint and two MAG3s (inertial sensor module) on the thigh were in a group to measure the data for the thigh orientation and knee joint position using the double-sensor difference based algorithm, and two MAG3s on the thigh and shank near the knee joint were in a group to measure the data for the shank orientation and ankle joint position using the virtual-sensor based algorithm. Compared with the camera motion capture system, the correlation coefficients in three trials were above 0.89 for the hip FE, higher than 0.9 for the hip AA and better than 0.88 for the knee FE.. There was no integration of angular acceleration or angular velocity for the joint rotations and positions in this method. The developed wearable sensor system was available to visually and quantitatively confirm the complete lower limb posture with fewer sensors and high degree of accuracy. And it can also be used in other conditions, such as estimating posture of mechanical arm or upper limb." @default.
• W1964422552 created "2016-06-24" @default.
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• W1964422552 date "2010-06-01" @default.
• W1964422552 modified "2023-09-26" @default.
• W1964422552 title "Visual estimation of lower limb motion using physical and virtual sensors" @default.
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• W1964422552 doi "https://doi.org/10.1109/icinfa.2010.5512355" @default.
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