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In this article we describe the design and construction of a wearable sEMG signal acquisition system for long term monitoring using dry electrodes based on conductive fabrics. It is necessary to have a system capable of conforming to the shape of the forearm in order to acquire more reliable signals during long time sensing. Therefore, we develop a miniaturized sEMG acquisition system that can be...
Surface EMG signals have many important characteristics that could be useful to anticipate user's movements for orthotic and prosthetic devices. New methods for signal processing have appeared, but not all of them apply to non-linear and non-stationary processes such like myolectric signals. To perform a real-time analysis over these signals is important to simplify the processing and reduce time...
The aim of this article is to design a miniaturized sEMG signal acquisition system with integrated dry electrodes in order to reduce the induce noise due to the cables. The miniaturization of the system allows to reduce the electronic noise produce by the components and to reduce the acquisition area in a more punctually way. The use of dry electrodes allows us to make long term acquisition so that...
An improving to control a hand prosthesis prototype is presented on this paper, it is a feedback system to measure and limit currents for five actuators. Three different actuators were used: servomotor, stepper motors & gear motors. The hand performs two different movements: flexo-extension & abduction-adduction; is controlled via embedded systems using Arduino® platform, each finger has a...
The state of the art and already on market electromechanical prosthesis are mostly implemented by using the sequential movement of actuators, which give extra load to each other during movement. As a solution to this problem, some of the newest prosthesis (mostly in development) use simultaneous movement of actuators instead, which increase their overall load capacity and their DOF. However, backbones...
This article describes a patient training evolution to achieve myoelectric control in the remnant limb. The methodology is divided in two main stages: (i) the training procedure, where the patient is submitted to a protocol for educating the muscles of the remnant limb, and (ii) myoelectric signal acquisition and analysis, in order to measure the patient evolution to reach different contraction levels...
In this article, it will be described the state of the art of upper limb prosthesis and several types of them. The prosthesis evolution had allowed people who lost an extremity to win back their normal life and live it with fewer limitations. Designing a myoelectric prosthetic arm that interacts with the amputee requires the integration of countless disciplines. Traditional commercial prosthesis has...
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