Identification and optimization of key process parameters in noncontact laser scanning for reverse engineering

This Extended Technical Note shows that the final accuracy level of reverse engineered surfaces depends on scanning distance and scanning angle of the laser beam, hence it also depends on the morphology of the scanned objects. On scanning strongly curved objects, such as the ones with free form surf...

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Veröffentlicht in:Computer aided design 2010-08, Vol.42 (8), p.744-748
Hauptverfasser: Korosec, Marjan, Duhovnik, Joze, Vukasinovic, Nikola
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creator Korosec, Marjan
Duhovnik, Joze
Vukasinovic, Nikola
description This Extended Technical Note shows that the final accuracy level of reverse engineered surfaces depends on scanning distance and scanning angle of the laser beam, hence it also depends on the morphology of the scanned objects. On scanning strongly curved objects, such as the ones with free form surfaces, the distance and impact angle of the laser beam are changing continuously during the scanning process. On the basis of these, two critical parameters are specified for the design model, which make it possible to predict these two factors in advance, depending on the morphology of the scanned object. First, a mathematical–statistical design model of the scanning process is generated, which relies on ANOVA (analysis of variance) and DOE (design of experiments). In the next step, a fitness function is optimized by the genetic algorithm (GA) program. This optimization improves the accuracy of the final scanned surfaces, in terms of the minimum standard deviation values of reverse engineered 3D surface model. The proposed approach was confirmed in a case study, which is presented at the end of this Technical Note.
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subjects Accuracy
Analysis of variance
ANOVA
Design engineering
Design model
Genetic algorithm
Genetic algorithms
Laser beams
Laser scanner
Mathematical models
Morphology
Reverse engineering
Scanning
Standard deviation
title Identification and optimization of key process parameters in noncontact laser scanning for reverse engineering
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