Abstract:
In the course of time, a spinal cord injury has a significant impact on life. If complications are
not effectively managed, they could lead to things like work related to nervous system malfunctions,
hypotension and abnormalities in muscle mass etc. At present, there is a treatment method for
increasing muscle and bone mass or treatment by rehabilitation according to the principles of
rehabilitation medicine which takes a long time and has a high cost Because it requires specific
techniques and advanced expertise in the treatment. Another method of treatment that has positive
results for patients is to maintain the condition of the denervated muscle through functional
electrical stimulation, which is A form of electrical stimulation that is widely used in the medical
industry physical therapy and rehabilitation both clinical and research For this reason, this
engineering project focuses on developing an experimental board for commanding parameters in
functional electrical stimulation for specific stimulation and rehabilitation of patients to achieve
function in the Denervated Muscle which consists of generating 3 types of waveforms which are
Square wave, Triangle wave and Sine wave, as well as adjustable frequency and duty cycle, with
long service life. It can be used up to 5 hours 55 minutes when powered by a Power Unit and can
adjust the voltage up to 100 volts from the high voltage booster circuit. The discrepancy while
adjusting the voltage was 0.9245 percent and the Root Mean Squared Error was 0.999 percent. The
human skin equivalent circuit showed a maximum current output of 123.96 mA, a ทาonophasic pulse
test when applied at a voltage of 5 volts to 100 volts and a command wave with biphasic pulse
when supplying voltage from 15 volts to 90 volts by measuring peak to peak voltage. It was found
that the average percentage error was about 3.127% and 3.951% respectively.
