| Zugriffsnummer | 33967 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Analysis of combined probing measurement error and length measurement error test for acceptance testing in dimensional computed tomography |
| Autor(in); Institution |
Borges de Oliveira, Fabrício; 5.3, Koordinatenmesstechnik, PTB-Braunschweig
Bartscher, Markus; 5.3, Koordinatenmesstechnik, PTB-Braunschweig
Neuschaefer-Rube, Ulrich; 5.3, Koordinatenmesstechnik, PTB-Braunschweig
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| Quelle/Jahr | Digital Industrial Radiology and Computed Tomography (DIR 2015): proceedings. Journal of Nondestructive Testing and Ultrasonics:(2015), Aug., 12 S. |
| Availability | [online only] |
| ISSN | 1435-4934 |
| URL | |
| Verlag | Bad Breisig: NDT.net |
| Konferenzangaben | International Symposium on Digital Industrial Radiology and Computed Tomography (DIR 2015), Ghent, 22-25, June, 2015, Belgium |
| Freie Schlagworte | CT ; CMS ; ISO 10360 ; dimensional CT ; P/E test |
| Zusammenfassung | In the last decade, industrial X-ray Computed Tomography (CT) has evolved as an alternative for classical (i.e., tactile and optical) coordinate measurement systems (CMSs). Consequently, to further increase the trust in CT measurements, both manufacturer and user of industrial CT are highly interested in standardization. Acceptance testing is part of the scope in the well-established international ISO 10360 series of standards, up to now focused on classical CMSs. A common method to assess locally and globally CMS errors is probing measurement error (P) and length measurement error (E) testing, respectively. This paper explores in an experimental approach advantages and disadvantages of performing combined, i.e. simultaneous, P and E tests in the field of dimensional CT. Two important benefits of combined P/E testing is the potential reduction of time and costs. However, the combined P/E test is a completely new concept in the field of dimensional metrology and needs to be analyzed for its metrological characteristics. Thus, the paper discusses this new approach and creates input for the international standardization of dimensional CT. Both experimental CT scans and CT simulations for combined P/E are performed. The hole plate standard has shown to be an useful tool to evaluate E, due to its high number of possible features and different radiation absorption length. Moreover, the hole plate is in accordance with ISO 10360 concepts. Thus, in the experimental CT scans, a calibrated hole plate and a calibrated sphere (i.e., classical CMS tactile probe) were used as reference standards for studying the combined P/E test; a length and probing measurement- based analysis were carried out. Additionally, simulations of CT scans using the BAM software ARTist are performed where the simulation parameters are comparable to performed CT scans (e.g. material composition, shape, dimensions and setup parameters). The simulated measurements were carried out for different distances hole plate to sphere; length and probing measurement- based analysis were performed as well. CT scans and simulations include the case of independent P and E tests, too. At the end of the paper the authors summarize the experimental results for the combined P/E testing approach and try to give a personal rating of the applicability of the new concept to coordinate metrology for the case of CT. |
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