PROTÓTIPO DE MOEDOR DE GRÃOS COM SISTEMA DE SEGURANÇA INTEGRADO CONFORME NR 12

Abstract

The present article describes the development of a grain mill prototype with an integrated safety system, designed in compliance with Brazilian Regulatory Standard No. 12 (NR-12), aiming to ensure the operational efficiency and the physical safety of operators. The research intended to develop and analyze an automated, safe and ergonomic equipment. Methodologically, the study was structured in four stages: the design of the mechanic and electric project, the implementation of the automation system, performance test and the evaluation of compliance with safety requirements. Principles of control engineering, ergonomics and interlocking were applied to reduce the risks of accidents and to enhance the operation of the equipment. The results showed that the prototype presented an average response time of 0.25 seconds in the interlocking system, stable operational efficiency and full compliance with NR 12 and the regulatory standards NBR ISO 13849-1:2019 and NBR IEC 60204-1:2016. Furthermore, ergonomic improvements and a significant reduction in mechanical and electrical risks were observed. The study concludes that the project is technically viable and socially relevant, providing an accessible and safe solution for small industries and agricultural enterprises. This work contributes to advancing the application of automation technologies focused on machine safety and the prevention of occupational accidents.