Embedded Files
Designed a hand orthosis for rehabilitation of paretic hand caused by stroke using SolidWorks. Already 3D printed parts but always printing more with dimension modifications to fit varying hand sizes. Already designed and soldered electrical components and got the electromechanical system to work in unison.
Next step is to complete mechanical design of finger support and include buttons as user input to change the polarity of the motor. Once that is achieved the upcoming challenge will be to replace the buttons with the Myoware EMG sensors to act as the user input.
orthosis.mp4Functionality
Functionality
Uses a 9V battery to power Arduino Nano and a 6V gear motor, Incomplete hand orthosis prototype but general functionality and mechanical design is working and finished. The gear motor will be replaced with a stepper motor or other with a DETENT Torque=0. This characteristic is desired and will be required for a successful project since I do not want the gear to not produce torque when not energized.
emgMotorReversing.mp4EMG sensor
EMG sensor
Proof of Concept: Placed two bipolar electrode pairs on my left and right forearm. These read and send muscle activity signals to the Myoware sensor which is connected to an Arduino Uno to rotate the 12V motor clockwise or counter clockwise.
Programming Logic: Simple threshold value in an if statement that controls the direction and activation of the motor.
OrthosisAnimation.mp4Animation
Animation
Hand animation via Solidworks of the original but outdated hand orthosis design.
OrthosisDrawing.PDFSpecification
Specification
Drawing and Bill of Material of old and outdated Hand Orthosis design via Solidworks
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