A study on evaluation strategies in dimensional X-ray computed tomography by estimation of measurement uncertainties
Computed tomography has entered the industrial world in 1980’s as a technique for non-destructive testing and has nowadays become a revolutionary tool for dimensional metrology, suitable for actual/nominal comparison and verification of geometrical and dimensional toler...
Main Authors: | , , , |
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Format: | Article |
Language: | English |
Published: |
EDP Sciences
2012-01-01
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Series: | International Journal of Metrology and Quality Engineering |
Subjects: | |
Online Access: | https://www.metrology-journal.org/articles/ijmqe/pdf/2012/02/ijmqe120011.pdf |
Summary: | Computed tomography has entered the industrial world in 1980’s as a technique for
non-destructive testing and has nowadays become a revolutionary tool for dimensional
metrology, suitable for actual/nominal comparison and verification of geometrical and
dimensional tolerances. This paper evaluates measurement results using different measuring
strategies applied in different inspection software packages for volume and surface data
analysis. The strategy influence is determined by calculating the measurement uncertainty.
This investigation includes measurements of two industrial items, an aluminium pipe
connector and a plastic toggle, a hearing aid component. These are measured using a
commercial CT scanner. Traceability is transferred using tactile and optical coordinate
measuring machines, which are used to produce reference measurements. Results show that
measurements of diameter for both parts resulted in smaller systematic errors compared to
distance and height measurements. It was found that uncertainties of all measurands
evaluated on surface data were generally greater compared to measurements performed on
volume data. |
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ISSN: | 2107-6839 2107-6847 |