In this paper we describe the design and evaluation of a passive lower limb assistive exoskeleton based on omnidirectional rehabilitation vehicle. According to the leg dynamics during assisted walking, we optimize the design parameters to make the lower limb obtain the most positive energy. We employ MACCEPA (mechanically adjustable compliance and controllable equilibrium position actuator) in design which generates the constant torque in knee joint. Experiments were performed on injured people and their results verify the system effect in reducing physical power.

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Background: Current neuroscience has identified rehabilitation approaches with the potential to stimulate adaptive changes in the brains of persons with hemiparesis. These approaches include, intensive task-oriented training, bimanual activities and balancing proximal and distal upper extremity interventions to reduce competition between these segments for neural territory. Methods: This paper describes the design and feasibility testing of a robotic/virtual environment system designed to train the hand and arm of persons with hemiparesis. The system employs a simulated piano that presents visual, auditory and tactile feedback comparable to an actual piano. Arm tracking allows patients to train both the arm and hand as a coordinated unit, emphasizing the integration of both transport and manipulation phases. The piano trainer includes songs and scales that can be performed with one or both hands. Adaptable haptic assistance is available for more involved subjects. An algorithm adjusts task difficulty in proportion to subject performance. A proof of concept study was performed on four subjects with upper extremity hemiparesis secondary to chronic stroke to establish: a) the safety and feasibility of this system and b) the concurrent validity of robotically measured kinematic and performance measures to behavioral measures of upper extremity function. Results: None of the subjects experienced adverse events or responses during or after training. As a group, the subjects improved in both performance time and key press accuracy. Three of the four subjects demonstrated improvements in fractionation, the ability to move each finger individually. Two subjects improved their aggregate time on the Jebsen Test of Hand Function and three of the four subjects improved in Wolf Motor Function Test aggre-gate time. Conclusion: The system designed in this paper has proven to be safe and feasible for the training of hand function for persons with hemiparesis. It features a flexible design that allows for the use and further study of adjustments in point of view, bilateral and unimanual treatment modes, adaptive training algorithms and haptically rendered collisions in the context of reha-bilitation of the hemiparetic hand.

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Действия, совершаемые компьютерными хулиганами и мошенниками с информационно-вычислительными системами, приносят немало вреда, по большей части, финансово-материального плана. Однако по мере усложнения технологий и все более глубокого проникновения их не только в нашу персональную жизнь, но и собственное тело ученые проявляют и большее беспокойство.

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(EN)Load measuring sections (50, 52) are provided with reaction sensors (50a, 50b, 52a, 52b) for measuring the loads at two positions, i.e. the tiptoes and the heels, on the sole side of the right and left feet of a person (12) wearing the device. The reaction sensor (50a) detects the reaction to a load on the front side of the right foot (right tiptoe), and the reaction sensor (50b) detects the reaction to a load on the rear side of the right foot (right heel). The reaction sensor (52a) detects the reaction to a load on the front side of the left foot (left tiptoe), and the reaction sensor (52b) detects the reaction to a load on the rear side of the left foot (left heel). Each reaction sensor (50a, 50b, 52a, 52b) is arranged to detect, based on the variation in capacitance, the loads acting on the right and left feet by the walking motion of the person (12) wearing the device, and can detect the variation in load incident to movement of weight and whether or not the foot of the person (12) wearing the device contacts the ground surface.
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Категория: Патенты | 1 Комментарий »

Парализованные пациенты с нетерпением ждут массовой системы управления предметами силой мысли. Учёные и инженеры вроде уже не раз и не два показывали такие опытные установки в действии. Вот только с их серийностью, не говоря уже о массовости, – проблема. Три новые технологии, появившиеся недавно, должны существенно продвинуть работы на данном фронте.

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