Exoskeleton ankle robot
First Claim
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1. An exoskeleton ankle robotic device comprising:
- a leg brace;
a foot piece pivotally coupling to said leg brace at or proximal to an ankle position;
an actuator coupling to said leg brace and said foot piece through an articulated joint, said actuator receiving power from a power source and generating a torque to drive said articulated joint to produce relative rotatory movement between said leg brace and said foot piece;
a gear transmission system coupling to said actuator and said articulated joint to transmit rotation axis of the actuator;
at least one force sensor for measuring force applied to the foot piece;
motion sensors comprising an accelerometer for measuring linear acceleration along a shank of a user and a gyroscope for measuring angular velocity of the shank of the user; and
a controller configured to;
receive the force applied to the foot piece for determining a gait phase of the user;
receive the linear acceleration and the angular velocity, both of which are measured at the gait phase;
wherein the gait phase is either a swing phase or a pre-swing phase;
compare the linear acceleration and the angular velocity with a set of predetermined thresholds to classify a walking condition of the user using a control algorithm, the set of predetermined thresholds being determined under different walking conditions; and
send a command to control said actuator for actively assisting a gait of the user under the walking condition.
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Abstract
A portable electrical motor-driven exoskeleton ankle joint robot with gear transmission and control system which is intended to provide walking assistance in different speed and walking conditions to persons with disability in walking or muscle weakness or joint problem.
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Citations
16 Claims
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1. An exoskeleton ankle robotic device comprising:
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a leg brace; a foot piece pivotally coupling to said leg brace at or proximal to an ankle position; an actuator coupling to said leg brace and said foot piece through an articulated joint, said actuator receiving power from a power source and generating a torque to drive said articulated joint to produce relative rotatory movement between said leg brace and said foot piece; a gear transmission system coupling to said actuator and said articulated joint to transmit rotation axis of the actuator; at least one force sensor for measuring force applied to the foot piece; motion sensors comprising an accelerometer for measuring linear acceleration along a shank of a user and a gyroscope for measuring angular velocity of the shank of the user; and a controller configured to; receive the force applied to the foot piece for determining a gait phase of the user; receive the linear acceleration and the angular velocity, both of which are measured at the gait phase;
wherein the gait phase is either a swing phase or a pre-swing phase;compare the linear acceleration and the angular velocity with a set of predetermined thresholds to classify a walking condition of the user using a control algorithm, the set of predetermined thresholds being determined under different walking conditions; and send a command to control said actuator for actively assisting a gait of the user under the walking condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification