Análise do desgaste em amostras de ensaios de lubricidade utilizando processamento de imagens

• Ano de defesa: 2021
• Autor(a) principal: Jácome, Maxwell Cavalcante
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Rio Grande do Norte; Brasil; UFRN; PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA MECÂNICA
• Palavras-chave em Português: Desgaste; Lubricidade; Processamento de imagens; Redes neurais artificiais
• Link de acesso: https://repositorio.ufrn.br/handle/123456789/32368

Tribological tests are developed as a controlled way to evaluate the wear mechanism acting between metallic surfaces, as well as to observe the influence of the type of lubricant used. Lubricity is an important characteristic for the evaluation of lubricating fluids, standardized by standard and measured by the HFRR (High Frequency Reciprocating Rig) test, which is given by the sphere-disc tribological system in lubricated contact, and it produces as a result, images from the wear and the scar diameter is extracted, defining the Wear Scar Diameter - WSD. From a set of samples of different fuels applied as lubricants, images of the worn surfaces were obtained. Thus, it is proposed in this work to explore other characteristics of the images in addition to the WSD, thus allowing a better description of wear and the type of lubricant used. With the images acquired in the lubricity test, image processing techniques were applied using the Matlab software and the OpenCV library to obtain quantitative parameters. From this information, an Artificial Neural Network was able to classify new images according to the type of fuel used in the test with an average accuracy of 75%, demonstrating the use of artificial intelligence to identify and classify wear patterns from the analysis of their images.