摘要:
The invention relates to a method for controlling an orthopedic joint device (1) of a lower extremity comprising an upper part (2) and a lower part (3) mounted in articulated fashion thereon, with a conversion device (5) being arranged between said upper and lower parts, via which conversion device (5), during pivoting of the upper part (2) relative to the lower part (3), mechanical work from the relative movement is converted and is stored in at least one energy store (54) and supplied back to the joint device (1) with a time offset in order to assist the relative movement, wherein the stored energy is converted back and the supply of mechanical work takes place in a controlled manner during the assistance of the relative movement.
摘要:
There are provided an artificial joint device (2) that can realize an artificial limb enabling twisting motion without a drive source, and when with the drive source, reduce the size and costs of the device, and a parallel linkage that can realize the device. The linkage connects a foot portion (3) and a mounting plate (4a) spaced from each other. A fixed link (11) has one end fixed to the plate (4a), and the other end connected to the foot portion (3) via a ball joint (12), making the angle of the fixed link (11) relative to the foot portion changeable in any direction. Expansible links (13) extend between the foot portion (3) and the plate (4a) in an expansible/contractible manner and each have opposite ends connected to the plate and the foot portion via respective upper and lower ball joints (14a,14b), making respective angles thereof relative to the foot portion and the plate changeable in any direction.
摘要:
A prosthetic joint including a hydraulic system, comprising: at least one chamber; at least one accumulator configured to store hydraulic fluid at a high pressure; at least one reservoir configured to store hydraulic fluid at a low pressure; one or more fluid flow paths connecting the chamber to the accumulator and the reservoir, flow controllers in the fluid flow paths, and fluid distributed throughout the hydraulic system; a load-determining sensor; a displacement-determining sensor; and a microprocessor configured to actuate one or more flow controllers based upon a load determining sensor input, a displacement-determining sensor input, a product of the load-determining sensor input and the displacement-determining sensor input, any time derivative thereof, or any combination thereof, wherein one or more flow controllers are configured to control displacing fluid from the chamber to the accumulator during periods of a threshold negative work, and one or more flow controllers are configured to control displacing fluid from the accumulator to the chamber to perform positive work.
摘要:
A damping control method for lower-limb prosthesis, which includes the following steps: Isolate the driving motor of the main transmission structure from the driving voltage; The motor is driven to rotate by the force that results from the locomotion of human's CoM (Center of Mass), and generates alternating induced voltage, when the motor behaves as a generator; Connect the output terminals of the motor with a full-bridge rectification circuit that is made of Schottky diodes to transform the alternating induced voltage to direct-current voltage; Connect the output terminals of the rectification circuit with a controlled switch such as transistors or MOSFETs to form a closed circuit, which will generate induced current from the induced voltage; Control the on-off ratio of the switch with the Pulse-Width-Modulation (PWM) signal to generate controllable motor current, which will result in controllable braking torque under the magnet field of the motor. This invention can be widely applied to prosthesis control.
摘要:
A human exoskeleton includes a battery. The human exoskeleton also includes an electric motor electrically coupled to the battery and powered by the battery to actuate at least one component of the human exoskeleton in an activated state of the electric motor, the electric motor back-driven during a non-activated state of the electric motor to regenerate power in the battery.
摘要:
A power generating leg, configurable to be coupled to a person's lower limb, comprising a thigh link, a shank link, a knee mechanism, a torque generator, and a power unit The knee mechanism is connected to said thigh link and said shank link, and allows movements of said thigh link and said shank link relative to each other The torque generator is configured to generate torque between said shank link and said thigh link The power unit is coupled to said torque generator, and configured to cause said torque generator to generate torque In a power regeneration mode, said power unit causes said torque generator to generate a torque that opposes the angular velocity of said thigh link and said shank link and said power unit converts a portion of the power associated with the product of said torque into electrical power to be stored in a storage device.
摘要:
Methods and apparatus are disclosed for harvesting energy from motion of one or more joints. Energy harvesters comprise: an energy converter for converting mechanical energy into corresponding electrical energy; one or more sensors for sensing one or more corresponding characteristics associated with motion of the one or more joints; and a controller connected to receive the one or more sensed characteristics and configured to assess, based at least in part on the one or more sensed characteristics, whether motion of the one or more joints is associated with mutualistic conditions or non-mutualistic conditions. If conditions are determined to be mutualistic, energy harvesting is engaged. If conditions are determined to be non-mutualistic, energy harvesting is disengaged.
摘要:
There are provided an artificial joint device (2) that can realize an artificial limb enabling twisting motion without a drive source, and when with the drive source, reduce the size and costs of the device, and a parallel linkage that can realize the device. The linkage connects a foot portion (3) and a mounting plate (4a) spaced from each other. A fixed link (11) has one end fixed to the plate (4a), and the other end connected to the foot portion (3) via a ball joint (12), making the angle of the fixed link (11) relative to the foot portion changeable in any direction. Expansible links (13) extend between the foot portion (3) and the plate (4a) in an expansible/contractible manner and each have opposite ends connected to the plate and the foot portion via respective upper and lower ball joints (14a,14b), making respective angles thereof relative to the foot portion and the plate changeable in any direction.