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Measurement uncertainty evaluation in dimensional X-ray computed tomography using the bootstrap method

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Abstract

Industrial applications of computed tomography (CT) for dimensional metrology on various components are fast increasing, owing to a number of favorable properties such as capability of non-destructive internal measurements. Uncertainty evaluation is however more complex than in conventional measurement processes, e.g., with tactile systems, also due to factors related to systematic errors, mainly caused by specific CT image characteristics. In this paper we propose a simulation-based framework for measurement uncertainty evaluation in dimensional CT using the bootstrap method. In a case study the problem concerning measurement uncertainties was addressed with bootstrap and successfully applied to ball-bar CT measurements. Results obtained enabled extension to more complex shapes such as actual industrial components as we show by tests on a hollow cylinder workpiece.

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Authors and Affiliations

  1. Fraunhofer Application Center for Computed Tomography in Metrology (CTMT), Edlmairstr. 6+8, 94469, Deggendorf, Germany

    Jochen Hiller

  2. Department of Mechanical Engineering and Mechatronics, Deggendorf Institute of Technology, Edlmairstr. 6+8, 94469, Deggendorf, Germany

    Jochen Hiller

  3. Department of Mechanical Engineering, Technical University of Denmark (DTU), Produktionstorvet, Bygning 425, 2800, Kgs. Lyngby, Denmark

    Jochen Hiller & Leonardo De Chiffre

  4. Department of Management and Production Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy

    Gianfranco Genta, Giulio Barbato & Raffaello Levi

Authors
  1. Jochen Hiller
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  2. Gianfranco Genta
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  3. Giulio Barbato
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  4. Leonardo De Chiffre
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  5. Raffaello Levi
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Corresponding author

Correspondence to Gianfranco Genta.

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Hiller, J., Genta, G., Barbato, G. et al. Measurement uncertainty evaluation in dimensional X-ray computed tomography using the bootstrap method. Int. J. Precis. Eng. Manuf. 15, 617–622 (2014). https://doi.org/10.1007/s12541-014-0379-9

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  • DOI: https://doi.org/10.1007/s12541-014-0379-9

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