The multi-sensor Tomolibri® - measuring using computed tomography

Computed tomography is used as a tool for non-destructive testing in the industry as means for quality assurance and development. For some time now, industrial CT systems have been in use for tasks in the field of dimensional measurements. The advantage of this technique is the ability to completely and non-destructively scan and measure the surface of complex parts. Within a joint research project of the Fraunhofer Institutes IPA, IZFP, IOF and IIS under leadership of the Fraunhofer IPA, a so-called "Tomometer" was developed. This device realises the entire process chain in measuring, ranging from data acquisition to metrological processing. The multi-sensor Tomolibri® combines a high resolution CT system with a an optical sensor developed by the Fraunhofer IOF.. This surface scanner is based on fringe projections and provides 3D coordinates of the visible surface with an accuracy of a few micrometers This article depicts the components of this multi-sensor device and, using selected examples, shows the application of the second sensor for refeeding the CT data, for using the synchronous artefact reduction as well as software tools for metrological evaluation.