Material influence in coordinate measurement using X-ray CT |
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| Affiliation: | 1. Engineering Measurement Division, National Physical Laboratory, Hampton Road, Teddington TW11 0LW, Middlesex, United Kingdom;2. Department of Mechanical Engineering, KU Leuven, Celestijnenlaan 300—Box 2420, 3001 Leuven, Belgium;3. Department of Management and Engineering, Università degli Studi di Padova, Stradella San Nicola 3, 36100 Vicenza, Italy;1. Mechanical Engineering Department, KU Leuven, 3000, Leuven, Belgium;2. Engineering Measurement Division, National Physical Laboratory, TW11 0LW, Teddington, UK;3. Department of Management and Engineering, University of Padova, 36100, Vicenza, Italy;1. Fraunhofer Application Center for Computed Tomography in Metrology (CTMT), Edlmairstr. 9, 94469 Deggendorf, Germany;2. Department of Mechanical Engineering and Mechatronics, Deggendorf Institute of Technology (DIT), Edlmairstr. 6+8, 94469 Deggendorf, Germany;1. Georgia Institute of Technology, Atlanta, GA, 30318, USA |
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| Abstract: | The X-ray computed tomography system (XCT) as a coordinate measuring system has been increasingly introduced into the manufacturing industry because of its capability of measuring internal features. However, the metrological performance evaluation method for XCT has not yet been standardized. One of the biggest reasons of this is the difficulty in evaluating the material influence. The previous research by the authors revealed that the material influence significantly affects the form of the object to be measured. ISO/TC 213/WG 10, which covers the ISO standards of coordinate measuring machines, proposes the introduction of an additional object, called an “obstructive body,” by which the material influence is enhanced. This study presents the experimental results and a software simulation, in which the material influence is produced in a specific area and not on the entire surface of the test object. Additionally, requirements for the obstructive body in the industrial standardization of performance evaluation methods for XCT are proposed. |
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| Keywords: | X-ray computed tomography Dimensional measurement Standardization |
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