Precision Analysis of Optical 3D Digitisation of Shaped Elements

Abstract:

This paper presents results of a carried out research in the field of scanning precision of contactless optical 3D scanners. Results stated in this paper bring great benefits to practice, since it demonstrates the quality and limits of measuring by means of contactless optical systems in real conditions and therefore its possible use in the field of inspecting the dimensional and shape precision of industrial products.A measurement etalon of various shapes and sizes was designed and manufactured for the purpose of this analysis. The nominal dimensions of the etalon were set by measuring of the coordinate measuring machine and these real values were compared to the model obtained by optical digitisation of Atos II and RevScan. Based on the evaluation of results, scanner measurement precision diagrams were drawn according to the studied aspects, e.g. dependence on the shape of the measured element and its nominal size. Another essential part of the research was determining the ability of 3D scanners to capture detailed parts of the model and assessing the scanning limits for each of the optical systems.

• Periodical: Applied Mechanics and Materials (Volume 693)
• Pages: 177-182
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.693.177
• Online since: December 2014
• Authors: Radomír Mendřický
• Keywords: 3D Digitization, 3D Optical Scanner, Accuracy, Laser Scanner, Optical Measurement

References

[1] Dokoupil, F. Stanovení odchylek meření 3D optického skeneru. Brno, 2013. Thesis. Brno university of technology. Faculty of mechanical engineering.

[2] Barbero, B., R., Ureta E., S. Comparative study of different digitization techniques and their accuracy. Computer-Aided Design [online]. 2011, roč. 43, č. 2, s. 188-206 [cit. 2014-05-30]. ISSN 00104485. Information on: http: /linkinghub. elsevier. com/retrieve/pii/S0010448510002150.

DOI: 10.1016/j.cad.2010.11.005

[3] GOM MBH. ATOS V7 - Hardware: User manual. Braunschweig, Germany, (2010).

[4] 3D Skenery. SolidVision [online]. [cit. 2014-05-30]. Information on http: /www. solidvision. cz/download/pdf/handyscan. pdf.

[5] Hofman, M. Analýza přesnosti 3D digitalizace s využitím optických skenerů. Liberec, 2013. Thesis. Technical University of Liberec. Department of Mechanical Engineering.