Erzeugung und Verwendung von Anwendungswissen in der industriellen Computertomographie

The subject of this thesis is industrial X-ray computed tomography (CT). On the one hand, CT is characterized by flexible applicability. On the other hand, this flexibility leads to operating a device has so far been reserved for experts. The method developed in this thesis aims to systematically generate application knowledge and make it available to non-experts.
Problematic in the systematic generation and subsequent use of application knowledge is the number of potential factors that influence a CT measurement and hence need to be examined. In addition to the operation of the device, the workpieces under investigation also need to be considered. As a consequence, designing experiments is challenging because a compromise between meaningfulness and practical feasibility has to be determined.
In the literature, this problem is only indirectly addressed. That is, several user support approaches have been developed in the past based on experimental designs. However, these approaches only focus on partial aspects of the overall process for generating and subsequently using application knowledge, thus limiting their scope.
This thesis develops a method to align the systematic generation of application knowledge with its subsequent use in a user support system. ... mehrThe resulting user support system covers influencing factors critical to the operation of a CT device while remaining practically feasible.
When implementing the method, the CT device settings and the workpiece design are combined in a suitable experimental design. The choice of CT device settings is aligned with the limits of the CT device’s measurement range. The workpieces are scalable and lead to pronounced image artifacts. They therefore produce information-rich measurements. The application knowledge generated through the experimental design is used in an expert system based on case-based reasoning. The quality of this expert system is successfully validated by an exemplary implementation of the method.
Applying the method for the generation and use of application knowledge allows CT users to systematically acquire expert knowledge and subsequently to optimally operate a CT device.