Sistema de eletroestimulação como biofeedback baseado em eletromiografia

Abstract

The present paper is intended for the research and development of a system capable of performing a controlled electrostimulation through a microcontroller with amplitude and frequency based on an electromyographic signal (EMG), with final destination the application in human prostheses with the objective of giving back, or provide, for the first time, sensations about a non-biological limb. Under these conditions, the system was separated into three parts, between them: circuit for collecting electromyographic signals, microcontroller and signal amplifier to perform the electrical stimulation.EMG signals were detected using statistical analysis using the ESP32 microcontroller, and a muscle signal identification system was implemented. For system validation, backtests were used in order to guarantee the veracity and precision of the mathematical model. The modules were developed individually só that they are not interdependent, and can be modular. For the return of sensations, a biofeedback system was developed, using non-intrusive electrostimulation with the aid of surface electrodes. The signal collection system developed during this project proved to be flexible só as not to be limited only to the ability to acquire EMG signals. The microcontroller system was able to process the data collected from the signal collection board, classify muscle contractions and manage the electrostimulation signal based on the input signal.