This paper deals with the electrical investigation of various sand mixtures used in foundries for mold and core production. It is possible to classify various molding sand mixtures reproducibly on the basis of their electrical characteristics. This knowledge can now be used to develop measurement systems for processes in the foundry industry and thus increase product quality. In addition, resources can be conserved, and functioning closed-loop systems can be integrated into foundry processes.

The analysis of constructional steel structures (such as car shells for rail vehicles) in terms of (i) dimensional checking according to DIN 25043-2:2012 and (ii) completeness checking represents a challenge. The use of 3D scanners is combined with using an adapted algorithm; the respective 3D model as the target state is superimposed with difference images. These difference images show possible dimensional deviations as well as possible missing parts or, at the least, suspect points.

We present a digital holographic sensor system that is capable of measuring the complete topography of machined components with sub-micrometer precision directly inside a tooling machine. This contribution includes detailed information about the architecture of the wireless interferometric sensor HoloPort. Experimental results on milled parts show the performance of the system and illustrate possible inline applications as well as future perspectives for the sensor.

This research work suggests a method for thermal effects' compensation during the linear measurements of objects without actual temperature measurements. Due to certain simplifications, the method is not as accurate as conventional ones (when temperature of the objects and the environment should be measured), but provides much more accuracy than linear measurements without temperature measurements normally do, though maintaining the same pace.

The degree of cross-linking and curing is an important value concerning the quality of cross-linked polyethylene (PE-X) and the functionality of adhesives and resin-based components. During this work the possibility of using single-sided NMR for the determination of this value in a non-destructive and much faster way than with the time-consuming standard laboratory measurements was shown. In addition, the usability of the measurement method for process quality control was investigated.