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Suche nach „[L.] [Reindl]“ hat 5 Publikationen gefunden
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    DigitalFraunhofer AWZ CTMTMaschinenbau und Mechatronik

    Zeitschriftenartikel

    Jochen Hiller, L. Reindl

    A computer simulation platform for the estimation of measurement uncertainties in dimensional X-ray computed tomography

    Measurement, vol. 45, no. 8, pp. 2166-2182

    2012

    DOI: 10.1016/j.measurement.2012.05.030

    Fraunhofer AWZ CTMTMaschinenbau und Mechatronik

    Zeitschriftenartikel

    Jochen Hiller, M. Maisl, L. Reindl

    Physical characterization and performance evaluation of an x-ray micro-computed tomography system for dimensional metrology applications

    Measurement Science and Technology, vol. 23, no. 8

    2012

    DOI: 10.1088/0957-0233/23/8/085404

    Abstract anzeigen

    This paper presents physical and metrological characterization measurements conducted for an industrial x-ray micro-computed tomography (CT) system. As is well known in CT metrology, many factors, e.g., in the scanning and reconstruction process, the image processing, and the 3D data evaluation, influence the dimensional measurement properties of the system as a whole. Therefore, it is important to know what leads to, and what are the consequences of, e.g., a geometrical misalignment of the scanner system, image unsharpness (blurring), or noise or image artefacts. In our study, the two main components of a CT scanner, i.e. the x-ray tube and the flat-panel detector, are characterized. The contrast and noise transfer property of the scanner is obtained using image-processing methods based on linear systems theory. A long-term temperature measurement in the scanner cabinet has been carried out. The dimensional measurement property has been quantified by using a calibrated ball-bar and uncertainty budgeting. Information about the performance of a CT scanner system in terms of contrast and noise transmission and sources of geometrical errors will help plan CT scans more efficiently. In particular, it will minimize the user's influence by a systematic line of action, taking into account the physical and technical limitations and influences on dimensional measurements.

    Fraunhofer AWZ CTMTMaschinenbau und Mechatronik

    Zeitschriftenartikel

    Jochen Hiller, L. Reindl

    A computer simulation for the estimation of measurement uncertainties in dimensional X-ray computed tomography

    Measurement, pp. 2166-2182

    2012

    Fraunhofer AWZ CTMTMaschinenbau und Mechatronik

    Zeitschriftenartikel

    Jochen Hiller, T. Fuchs, S. Kasperl, L. Reindl

    Einfluss der Bildqualität röntgentomographischer Abbildungen auf Koordinatenmessungen

    Grundlagen, Messungen und Simulationen

    tm - Technisches Messen, no. 7/8, pp. 334-347

    2011

    DOI: 10.1524/teme.2011.0137

    Abstract anzeigen

    Die industrielle Computertomographie (CT) findet in der dimensionellen Messtechnik zunehmend Akzeptanz. Allerdings ist noch wenig über den konkreten Einfluss verschiedener Systemkomponenten, physikalischer Störgrößen oder Bildverarbeitungsschritte auf dimensionelle CT-Messungen bekannt. In diesem Beitrag werden physikalische Bildgütemerkmale zur Beurteilung der Bildqualität in der CT vorgestellt und mittels Computersimulationen der Einfluss der Rekonstruktionsbildgüte auf Koordinatenmessungen untersucht.

    Fraunhofer AWZ CTMTMaschinenbau und Mechatronik

    Beitrag (Sammelband oder Tagungsband)

    Jochen Hiller, S. Kasperl, L. Reindl

    Charakterisierung und Modellierung eines μCT-Systems

    Berichtsband ITG/GMA-Fachtagung Sensoren und Messsysteme (Nürnberg)

    2010