Reverse engineering of planar parts using machine vision

Huang, Chien-Nan; Motavalli, Saeid

doi:10.1016/0360-8352(94)90070-1

Cited by 13 publications

(8 citation statements)

References 6 publications

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“…7 the results. Perfect images with sharp edges could give an accuracy of not less than 99.85 per cent of the original dimensions, as mentioned in the DMVision software [11].…”

Section: Discussionmentioning

confidence: 99%

“…Computer vision has been recently used in many applications in the ®eld of production engineering. These applications include sheet metal cutting [8], lace cutting [9], feature recognition [10], reverse engineering [11], surface texture [12], dimensional measurements [13±15], defect analysis [16], tool wear assessment [17] and classi®cation of machined features [18].…”

Section: Introductionmentioning

confidence: 99%

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An application of computer vision for programming computer numerical control machines

Eladawi

Gadelmawla

Elewa

et al. 2003

Proceedings of the Institution of Mechanical Engineers, Part B:

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Generation of the part programs, or tool paths, for products to be manufactured by computer numerical control (CNC) machines is very important. Many methods have been used to produce part programs, ranging from manual calculations to computer aided design/ manufacturing (CAD/CAM) systems. This work introduces a new technique for generating the part programs of existing products using the latest technology of computer vision. The proposed vision system is applicable for two-dimensional vertical milling CNC machines and is calibrated to produce both metric and imperial dimensions. Two steps are used to generate the part program. In the first step, the vision system is used to capture an image for the product to be manufactured. In the second step, the image is processed and analysed by software specially written for this purpose. The software CNCVision is fully written (in lab) using Microsoft Visual C++ 6.0. It is ready to run on any Windows environment. The CNCVision software processes the captured images and applies computer vision techniques to extract the product dimensions, then generates a suitable part program. All required information for the part program is calculated automatically, such as G-codes, X and Y coordinates of start-points and end-points, radii of arcs and circles and direction of arcs (clockwise or counterclockwise). The generated part program can be displayed on screen, saved to a file or sent to MS Word or MS Excel. In addition, the engineering drawing of the product can be displayed on screen or sent to AutoCAD as a drawing file.

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“…7 the results. Perfect images with sharp edges could give an accuracy of not less than 99.85 per cent of the original dimensions, as mentioned in the DMVision software [11].…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An application of computer vision for programming computer numerical control machines

Eladawi

Gadelmawla

Elewa

et al. 2003

Proceedings of the Institution of Mechanical Engineers, Part B:

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show abstract

“…Estos métodos usan cámaras de vídeo, escáners láser, el método Moire o la combinación de éstos; varían dependiendo del uso que dan a la luz o sonido, tipo y patrón de la luz empleada, y posición y número de instrumentos de capta ción. Las aplicaciones notificadas de estos métodos de ingeniería inversa han aumentado en años recientes (Evans, 1991;Hosni et al, 1993;Motavalli y Bidanda, 1994;Milroy et al, 1996;Huang y Motavalli, 1994;Sobh y Owen, 1995). Las respectivas tecnologías se encuen tran aún en investigación pero los resultados obtenidos hasta ahora son bastante prometedores.…”

Section: Sistemas De Ingeniería Inversa Que Emplean Tecno Logía Sin Cunclassified

“…A partir de la información extraída de un producto, es posible generar la trayectoria de herramientas en control numé rico. Esta puede ser usada en producción (Kim y Ko, 1994;Sobh y Owen, 1995;Huang y Motavalli, 1994) para definir moldes o dados (Hosni y Ferreira, 1994) o para producir modelos mediante técnicas de manufactura rápida (Aranson, 1996;Lin y Chen, 1997).…”

Section: Introductionunclassified

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1999

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En tiempos recientes, la ingeniería inversa se ha convertido en un tema relevante para industriales y académicos. Unos ven en ella sistemas compuestos por equipos y software útiles para reproducir compo nentes, mientras otros plantean grandes retos para desarrollar teorías de modelado y tecnologías para captura e interpretación de información. Aquí se presentan diversas interpretaciones de la ingeniería inversa, se hace un resumen sobre las principales líneas de investigación y se abordan las metodologías más avanzadas que se exploran actualmente. Con base en la información presentada, los autores expresan su opinión respecto al futuro de la investigación y aplicaciones de la ingeniería inversa.

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“…Documentación de diseños. Productos diseñados por medio de sistemas CAD son frecuentemente modificados durante la etapa de producción para ajustar detalles o hacer mejoras; así, el modelo CAD debe ser actualizado para que corresponda al resultado final (Puntambekar et al, 1994;Huang y Motavalli, 1994;.…”

Section: Introductionunclassified