The
main operation for this Knee Joint Therapy (KJT) device is basically on ability
to move knee joint in forward and reverse direction. This means the motion of
knee can flex during the treatment by determine specific angle for knee flexion
or based on range of motion.
The KJT device is powered by AC or DC power supply
whether it is operated in plugged in or battery mode. Also, power supply is
needed to supply the voltage and current to microcontroller and DC motor to
operate in the KJT device. These DC motor needed driving circuit in order to
function because the microcontroller cannot control the DC motor directly due
to low current output from microcontroller.
Draft of block diagram of whole device
Possible components that are related with Knee Joint Therapy Device:
1. Microcontroller: ATmega328/Arduino UNO = Receive input, processing and control the output
2. Push button or switches = Interface between user and the device
3. Adjustable Power Supply = Supply electrical current to all electronics system
4. H-Bridge circuit = Control the directional of DC motor rotation clockwise @ anti-clockwise
5. DC Motor = Electrodynamic drive for moving the mechanical structure
6. Potentiometer = Work as sensor that give feedback to the microcontroller on flexion angle
7. Mechanical Structure:
1) Bearing = to bear load between 2 moving parts with minimum amount of friction
2) Linear actuator = convert rotary motion into linear motion
3) Coupling = connect 2 shaft together, transmit power from driving shaft to driven shaft
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