@article{36800, abstract = {{Abstract. The miniaturisation of components leads to new demands on measurement systems. One of these is the resolution. As a volumetric analysis method and method of non-destructive testing, industrial X-ray computed tomography (XCT) has the ability to measure geometrical features and their corresponding dimensions without destroying them and can therefore be used for quality assurance. However, the concept of resolution is not trivial for XCT and has not yet been finally clarified. In particular, the interface structural resolution, the detectability of two surfaces facing each other after surface segmentation, faces a lack of a test specimen, a corresponding measurand and a reliable method. Simulation-based XCT investigations of a method to determine this type of resolution are presented in this article using the geometry of a test specimen that contains several radially arranged holes of the same size. The borehole diameters correspond to the distance between the holes to investigate the resolvability of surfaces and interfaces. The evaluation is based on mean and extreme values of grey value profiles between the individual boreholes of the reconstructed volume. It is shown that the geometrical detectability of the test specimen surface and interface can be extended by a reasonable choice of the threshold value for surface segmentation within a defined interval. With regard to the resolving capability, a distinction is made between assured detectability and possible detectability, as well as the threshold value used when using the ISO50 threshold for surface segmentation and measurement chain completion. }}, author = {{Busch, Matthias and Hausotte, Tino}}, issn = {{2194-878X}}, journal = {{Journal of Sensors and Sensor Systems}}, keywords = {{Electrical and Electronic Engineering, Instrumentation}}, number = {{1}}, pages = {{1--8}}, publisher = {{Copernicus GmbH}}, title = {{{Simulation-based investigation of the metrological interface structural resolution capability of X-ray computed tomography scanners}}}, doi = {{10.5194/jsss-12-1-2023}}, volume = {{12}}, year = {{2023}}, } @article{6555, author = {{Claes, Leander and Meyer, Thorsten and Bause, Fabian and Rautenberg, Jens and Henning, Bernd}}, issn = {{2194-878X}}, journal = {{Journal of Sensors and Sensor Systems}}, number = {{1}}, pages = {{187--196}}, title = {{{Determination of the material properties of polymers using laser-generated broadband ultrasound}}}, doi = {{10.5194/jsss-5-187-2016}}, volume = {{5}}, year = {{2016}}, } @article{13895, author = {{Kulshreshtha, Kshitij and Jurgelucks, Benjamin and Bause, Fabian and Rautenberg, Jens and Unverzagt, Carsten}}, issn = {{2194-878X}}, journal = {{Journal of Sensors and Sensor Systems}}, pages = {{217--227}}, title = {{{Increasing the sensitivity of electrical impedance to piezoelectric material parameters with non-uniform electrical excitation.}}}, volume = {{4}}, year = {{2015}}, } @article{13883, abstract = {{<p><strong>Abstract.</strong> In this paper, a new acoustic sensor principle for coating detection within liquid-filled tubes and containers based on mode conversion of leaky Lamb waves is introduced. Leaky Lamb waves are excited and detected by single-phase transducers, which are attached on the outer side of a tube or container. By transmission time and amplitude measurements, coating formation within the liquid-filled tube and container is detected non-invasively. This new sensor principle is subdivided into the separate considerations of Lamb wave excitation, mode conversion and inverse mode conversion. The Lamb wave excitation by a single-phase transducer is visualized by scanning laser Doppler vibrometer imaging. The mode conversion process of leaky Lamb waves is measured by membrane hydrophone measurements and Schlieren visualization; afterwards, the measured emission angles are compared with the theoretical one. The inverse mode conversion process of pressure waves back to leaky Lamb waves is visualized by Schlieren images. By merging the results of Lamb wave excitation, mode conversion and inverse mode conversion, the new sensor concept is explained. Theoretical considerations and measurement results of adhesive tape coating inside a liquid-filled plastic tube and a liquid-filled stainless steel container verify the new acoustic sensor principle. Finally the measuring sensitivity and the technical realization are discussed.</p>}}, author = {{Schmitt, M. and Schmidt, K. and Olfert, S. and Rautenberg, J. and Lindner, G. and Henning, Bernd and Reindl, L. M.}}, issn = {{2194-878X}}, journal = {{Journal of Sensors and Sensor Systems}}, pages = {{73--84}}, title = {{{Detection of coatings within liquid-filled tubes and containers by mode conversion of leaky Lamb waves}}}, doi = {{10.5194/jsss-2-73-2013}}, year = {{2013}}, }