Desenvolvimento de uma plataforma para aquisição de sinal elétrico muscular com o uso da técnica de eletromiografia de superfície

Abstract

This study proposes the development of a platform to acquire the muscular electrical signal from the shoulder region, which has a significant impact on self-care and social interaction. Professional activities that require effort from the upper limbs can develop Work-Related Musculoskeletal Disorders (WMSDs), and this condition can negatively affect the ability to perform tasks and participate in social activities. Surface Electromyography (sEMG) is used to non-invasively capture the muscle electrical signal during the execution of movements. In the field of occupational health, the technique is used to assess muscle performance and identify areas of overload and fatigue. To this end, the study was based on the literature on surface electromyography and analog circuits for acquiring the myoelectric signal, using the work of Basmajian (1985), Chedid, Deutsch and Vieira (2015) and Merletti and Cerone (2020), among other authors. It was decided to experimentally develop an analog circuit with a 4th order active filter and an external 16-bit A/D converter, in order to guarantee quality in muscle electrical signal acquisition, consistent with the intended purpose. The development methodology and the signal acquisition were based on the SENIAM protocol, which was adapted for this work. The electrical signal was acquired on site at a metal-mechanics company in the Serra Gaucha region, in the stamping sector. As a result, it can be considered that the signal acquisition was carried out and that the data collected, properly digitized and stored, serves as input for analysis by the company's occupational safety engineering professionals, so that, based on the characterization of muscle fatigue, the company can revise its production procedures and avoid the development of WMSDs. [resumo fornecido pelo autor]