cuidados ao se extrair dimensões de fotografia/filmagem em soldagem issues before performing measurements from pictures/films in welding
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ID: 177705
2009
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Abstract
As técnicas de fotografia e filmagem abriram caminhos para estudos em todas as áreas da soldagem e têm sido extensivamente utilizadas para se avaliar características tais como microconstituintes, fases, estruturas, transferência metálica, escoamento de gases, macrografias, deformações e medições geométricas de peças. Embora haja este uso fundamental na soldagem, tem-se notado constantes erros na utilização das técnicas de fotografia e filmagem, como erros de posicionamento, calibração, escolha do sensor, tipo e compactação de imagem. Objetiva-se assim trazer à discussão os critérios e cuidadosos necessários durante medições realizadas a partir de fotografias/filmagens em soldagem. São abordados ao longo do texto os principais detalhes relacionados ao tema de forma prática para que o usuário possa aproveitar todo o potencial de sua fotografia/filmagem. Espera-se a discussão aqui apresentada contribua para o melhor aproveitamento e correto uso das imagens/filmes obtidos em processos de soldagem. Espera-se também que haja comentários sobre o texto no sentido de melhorar e trazer à tona esta importante discussão no âmbito da Revista Soldagem & Inspeção.
Photographic and filming techniques have opened different study fields in all welding area and have been extensively employed to assess characteristics such as micro-constituents, phases, structures, metal transfer, gas flow, macro-etches, distortion and geometric measurements in workpieces. Despite this fundamental use in welding, constant mistakes and misuses of these techniques have been noticed, as positioning error, calibration, sensor selection, and type of image. Therefore, it is aimed here to address criteria required during measurements from pictures/films in welding. The main details are discussed in a practical form, so the user can benefit from the full potential of the technique. It is expected that the presented discussion contributes to the better and correct use of pictures/films from different welding processes. The authors also expect comments and suggestions to improve and bring this fundamental and important issue to the spotlight of the Revista Soldagem & Inspeção.
Photographic and filming techniques have opened different study fields in all welding area and have been extensively employed to assess characteristics such as micro-constituents, phases, structures, metal transfer, gas flow, macro-etches, distortion and geometric measurements in workpieces. Despite this fundamental use in welding, constant mistakes and misuses of these techniques have been noticed, as positioning error, calibration, sensor selection, and type of image. Therefore, it is aimed here to address criteria required during measurements from pictures/films in welding. The main details are discussed in a practical form, so the user can benefit from the full potential of the technique. It is expected that the presented discussion contributes to the better and correct use of pictures/films from different welding processes. The authors also expect comments and suggestions to improve and bring this fundamental and important issue to the spotlight of the Revista Soldagem & Inspeção.
| Reference Key |
vilarinho2009soldagemcuidados
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|---|---|
| Authors | ;Louriel O. Vilarinho;Bill Lucas;Sayee Raghunathan |
| Journal | Journal of applied microbiology |
| Year | 2009 |
| DOI |
10.1590/S0104-92242009000400011
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