Development of High-Density Surface Electromyography System

U ovom radu obrađene su teme snimanja elektromiografskih signala i problemi koji se pojavljuju prilikom snimanja površinske elektromiografije. Tehnikom snimanja površinske elektromiografije visoke prostorne razlučivosti moguće je riješiti problem ispravnog pozicioniranja elektroda i ponovljivosti mjerenja. Kao rezultat rada implementiran je 16 kanalni sustav. Napravljena je analiza analognih sučelja za mjerenje biopotencijala proizvođača Texas Instruments. Na temelju provedene analize odabrano je analogno sučelje ADS1298. Za implementaciju 16 kanalnog sustava povezana su dva ADS1298 kojima preko SPI protokola upravlja mikrokontroler ESP32. Projektirana je tiskana pločica na kojoj su dva ADS1298 i potrebno sklopovlje, a preko konektora se spaja na tiskanu pločicu s ESP32. Za razvijeni sustav napisana je ispitna programska podrška, tehnička dokumentacija i upute za korištenje. This paper deals with the topics of electromyographic signal recording and problems that appear when recording surface electromyography. With the technique of high density surface electromyography, it is possible to solve the problem of correct electrode positioning and repeatability of measurements. As a result of the work, a 16-channel system was implemented. An analysis of analog front - end ICs from Texas Instruments for measuring the biopotential was made. Based on the performed analysis, the analog front - end ADS1298 was selected. For the implementation of the 16-channel system, two ADS1298s are connected, which are controlled by the ESP32 microcontroller via the SPI protocol. A PCB with two ADS1298 and the additional hardware is designed, and it is connected to the PCB with ESP32 via a connectors. Test software, technical documentation and instructions for use have been written for the developed system.