Article, 2014

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

International Journal of Precision Engineering and Manufacturing, ISSN 2005-4602, 2234-7593, Volume 15, 4, Pages 617-622, 10.1007/s12541-014-0379-9

Contributors

Hiller, Jochen [1] [2] [3] Genta, Gianfranco 0000-0002-2983-1196 (Corresponding author) [4] Barbato, Giulio [4] De Chiffre, Leonardo 0000-0002-6141-9580 [3] Levi, Raffaello [4]

Affiliations

  1. [1] Deggendorf Institute of Technology
    2. [NORA names: Germany; Europe, EU; OECD];
  2. [2] Fraunhofer Application Center for Computed Tomography in Metrology (CTMT), Edlmairstr. 6+8, 94469, Deggendorf, Germany
    3. [NORA names: Germany; Europe, EU; OECD];
  3. [3] Technical University of Denmark
    4. [NORA names: DTU Technical University of Denmark; University; Denmark; Europe, EU; Nordic; OECD];
  4. [4] Polytechnic University of Turin
    5. [NORA names: Italy; Europe, EU; OECD]

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.

Keywords

CT imaging characteristics, CT measurements, X-ray, X-ray computed tomography, applications, bootstrap, bootstrap method, capability, cases, characteristics, complex shapes, components, computed tomography, cylinder workpiece, dimensional CT, dimensional metrology, error, evaluation, extension, factors, favorable properties, framework, imaging characteristics, industrial applications, industrial components, internal measures, measurement process, measurement uncertainty, measurement uncertainty evaluation, measurements, method, metrology, problem, process, properties, results, shape, simulation-based framework, system, systematic errors, tactile, tactile system, test, tomography, uncertainty, uncertainty evaluation, workpiece

Data Provider: Digital Science

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