Åpne denne publikasjonen i ny fane eller vindu >>2018 (engelsk)Inngår i: Precision engineering, ISSN 0141-6359, E-ISSN 1873-2372, Vol. 54, s. 420-426Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]
X-ray computed tomography is a highly versatile investigation method with applications in a wide range ofareas. One of the areas where the technique has seen an increased usage, and an increased interest from industry,is in dimensional metrology. X-ray computed tomography enables the measurement of features and dimensionsthat are difficult to inspect using other methods. However, there are issues with the method when it comes tomeasurements of objects that consist of several materials. In particular, it is difficult to obtain accurate computedtomography results for all materials when the attenuation of materials differs significantly. The aim of this workwas to measure small air gaps between different materials using dual-energy X-ray computed tomography. Thedual-energy method employed in this work uses two energy spectra and fuses the data in the projections spaceusing non-linear fusion. The results from this study show that the dual-energy method used in this work was ableto capture more measurements than regular absorption computed tomography in the case of specimens withhighly different attenuation, enabling, in particular, the measurement of smaller gaps. The contrast-to-noise ratiowas also increased significantly with the use of dual-energy.
sted, utgiver, år, opplag, sider
Elsevier, 2018
Emneord
Metrology, Computed tomography, Dual-energy, Multi-material measurements
HSV kategori
Forskningsprogram
Maskinteknik
Identifikatorer
urn:nbn:se:oru:diva-68991 (URN)10.1016/j.precisioneng.2018.07.012 (DOI)000452579900046 ()2-s2.0-85051065309 (Scopus ID)
Forskningsfinansiär
EU, FP7, Seventh Framework Programme, 607817
2018-09-212018-09-212020-01-31bibliografisk kontrollert