Sistema de apoio na inspeção radiográfica computadorizada de juntas soldadas de tubulações de petróleo

• Ano de defesa: 2012
• Autor(a) principal: Kroetz, Marcel Giovani
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Tecnológica Federal do Paraná; Curitiba; Programa de Pós-Graduação em Engenharia Elétrica e Informática Industrial
• Palavras-chave em Português: Processamento de imagens - Técnicas digitais; Juntas (Engenharia); Sistemas de reconhecimento de padrões; Algorítmos genéticos; Otimização matemática; Inteligência coletiva; Testes não-destrutivos; Métodos de simulação; Image processing - Digital techniques; Joints (Engineering); Pattern recognition systems; Genetic algorithms; Mathematical optimization; Swarm intelligence; Non-destructive testing; Simulation methods
• Link de acesso: http://repositorio.utfpr.edu.br/jspui/handle/1/509

The weld bead radiographic inspection is the activity of meticulously observe a radiographic image looking for small defects and discontinuities in the welded joints that can compromise the mechanical resistance of that joints. As any other activity than requires constant attention, the weld bead inspection is error prone due to visual fatigue, repetition and others distractions inherent to these activity. In this work, two new methodologies for help in the inspection activities are presented: the automatic detection of the weld bead and the highlighting of the weld bead discontinuities. Those that, among others functionalities, are included in a complete software solution for help in the weld bead inspection. Including the feature of macro programing for automation of the most common image processing routines and further processing bath of images in an automatic way. The results from the automatic weld bead detection is beyond the satisfactory, detecting weld bead from all the usual radiographic techniques. About the results of the highlight of the discontinuities, although that are not suited for a complete non supervised weld bead inspection, their correlation among intensity and the probability of the presence of a discontinuity is very well suited for discontinuities highlighting, a helpful tool in weld bead inspection. In conclusion, the proposed methodologies. combined with a fully featured interactive software solution, a lot contribute for the weld bead inspection activity, a decreased error rate due to visual fatigue and a better overall performance due to the automation of the most common procedures involved in this activity.