Creating a multi-material length measurement error test for the acceptance testing of dimensional computed tomography systems – F. B. Oliveira et al.

X Ray CT/5

Abstract

Non-destructive testing (e.g. defect detection, material characterization), reverse engineering, fibre orientation, and more
recently coordinate metrology represent the broad range of today`s applications of industrial X-ray computed tomography
(CT). However, the use of CT as a coordinate measurement system opens up new challenges to technology. This is especially
true of dimensional inspections of multi-material assemblies which are characterized as promising, but very demanding
applications of CT. The reliability of multi-material CT measurements is still an open issue due to the complexity of multimaterial
measurements and also because it is not covered in the current guidelines and standard drafts. Thus, this paper
presents – as part of a multi-material acceptance test and to create trust in multi-material CT measurement – a new design and
concept for multi-material length measurement error testing. It also discusses the test design and procedure based on the first
experimental results. The paper attempts to perform a critical analysis of the new reference standard design – a multi-material
hole cube – and tries to verify the concept in several steps.