Digitising systems that integrate mechanical and optical scanning technology offer the potential advantage of shorter data acquisition if compared with other methods such as manual digitisation using CMMs. They have as output a big amount of points even for a moderately complex part. This oversized information could be undesirable during the reconstruction of CAD models as required in reverse engineering. Furthermore, the distribution of digitised points could not meet the local curvature trend of the physical model. In this paper, algorithms that allow the manipulation, filtering and ordering of digitised points using not contact systems are discussed. The methodology is implemented in software and can be applied to objects of different shape and size. It automatically creates interpolating spline curves used in CAD modelling to define the natural boundaries of the component. The implemented procedures are discussed in detail in the paper. Some industrial case studies are then presented to validate the approach and to show the applicability of the proposed algorithms.

Software development for 3D digitizing data in reverse engineering.

BERTI, GUIDO;SAVIO, ENRICO;
1999

Abstract

Digitising systems that integrate mechanical and optical scanning technology offer the potential advantage of shorter data acquisition if compared with other methods such as manual digitisation using CMMs. They have as output a big amount of points even for a moderately complex part. This oversized information could be undesirable during the reconstruction of CAD models as required in reverse engineering. Furthermore, the distribution of digitised points could not meet the local curvature trend of the physical model. In this paper, algorithms that allow the manipulation, filtering and ordering of digitised points using not contact systems are discussed. The methodology is implemented in software and can be applied to objects of different shape and size. It automatically creates interpolating spline curves used in CAD modelling to define the natural boundaries of the component. The implemented procedures are discussed in detail in the paper. Some industrial case studies are then presented to validate the approach and to show the applicability of the proposed algorithms.
1999
IV CONVEGNO AITEM
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/175082
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