Form measurements in an industrial CT scanner investigated using a polymer step gauge

J. Angel, Alessandro Stolfi, Leonardo De Chiffre

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Computed Tomography (CT) is a promising technology for both geometrical measurements and form measurements. However, a number of influence factors such as magnification, threshold determination strategies, and position of feature in the CT volume, have effect on the CT measurement performance. The present investigation concerns the measurement of flatness at different positions in the CT measurement volume using a milled miniature step gauge. The artifact is a 42 mm long step gauge with 11 grooves at 2 mm steps, made of polyphenylene sulphide PPS (? = 1.650 g/cm<sup>3</sup>), with limited form error and good surface finish. A total of 132 flatness measurements were performed on the left step gauge grooves. The linear distribution of the grooves pointed out a non-uniform CT performance over the step gauge length with max deviation up to 25 μm. However, an appropriate choice of parameters yielded a reduction of the max deviation along the step gauge length by approximately 13 μm.
Original languageEnglish
Title of host publicationProceedings of the 15th International Conference of the European Society for Precision Engineering and Nanotechnology
PublisherThe European Society for Precision Engineering and Nanotechnology
Publication date2015
Pages203-204
ISBN (Print)9780956679079
Publication statusPublished - 2015
Event15th euspen International Conference & Exhibition (2015) - Leuven, Belgium
Duration: 1 Jun 20155 Jun 2015
Conference number: 15
http://www.euspen.eu/OurEvents/Leuven2015.aspx

Conference

Conference15th euspen International Conference & Exhibition (2015)
Number15
CountryBelgium
CityLeuven
Period01/06/201505/06/2015
Internet address

Cite this

Angel, J., Stolfi, A., & De Chiffre, L. (2015). Form measurements in an industrial CT scanner investigated using a polymer step gauge. In Proceedings of the 15th International Conference of the European Society for Precision Engineering and Nanotechnology (pp. 203-204). The European Society for Precision Engineering and Nanotechnology.