Hier finden Sie eine aktuelle Übersicht über offene Themen zu Bachelor- und Masterarbeiten. Die Themen sind nachfolgend angeführt.
Bei Interesse setzen Sie sich bitte mit Herrn Prof. Marco Da Silva oder dem jeweiligen Themenverantwortlichen in Verbindung.
Distributed Acoustic Sensing (DAS) based on optical fibers has become popular due to its non-invasive nature and high spatial resolution. Its application to bubble column reactors, a key piece of equipment in the process industry, opens up new approaches to monitoring these complex systems. Currently, pressure and temperature are commonly measured in such large scale plants, limiting the possibility of modern energy saving process control. We aim to investigate the use of DAS in such chemical reactors, which will open up new and improved ways of monitoring chemical processes.
Contact: Yannik Schick M.Sc.
Currently there is a trend to apply tomography to investigate flow in pipes, where fast processes may occur (e.g. multiphase flow, chemical reactions in vessels). Flow rate measurement of multiphase mixtures is very challenging. Tomographic sensor data can be explored for this task.
Therefore at our institute the following points provide the possible scope of a Bachelor-/ Master Thesis.
Contact: Univ.-Prof. Dr. Marco Da Silva
A multi-electrode conductance sensor (MECS) was developed to validate a computational fluid dynamics (CFD) simulation of gas-liquid flows in pipes. The MECS measures changes in conductivity in the vicinity of its electrodes and thus deduces the presence of air bubbles. In order to be able to draw conclusions about the speed of the air bubbles, the sensor is to be extended by a further measurement level.
Contact: Univ.-Prof. Dr. Marco Da Silva
Colloidal systems are commonly found in the chemical industry and consist of a continuous high volume phase (usually a liquid) and a dispersed phase (such as droplets, gas bubbles, or suspended solids). For a detailed characterization of such systems, the combination of dielectric
and optical spectroscopy seems to be sought. However, as a new technology, such combined measurement systems require the design, development and testing of dedicated sensors and measurement circuits. The depth and scope of the work will be tailored as a BSc or MSc thesis.
Contact: Univ.-Prof. Dr. Marco Da Silva
Imperceptible sensors are one of the key areas of research for wearable sensors in textiles or soft robots. In recent years, a number of highly conformable and compliant sensors have been
introduced. However, many of them optimize for sensitivity without addressing the other essential dimensions of sensor quality: specificity and stability. In particular, stability in dynamic
scenarios is often neglected and consequently some piezoresistive phenomena in polymeric materials are not fully understood. Spatially resolved techniques such as electrical impedance
tomography or matrix-based sensors are promising avenues for improvement.
Contact: Dr.-Ing. Johannes Mersch
Conductive elastomers, which are based on carbon particles as fillers are an emerging field of research. Possible applications range from soft robots and artificial muscles to electrodes for electromyography. But especially the stability in dynamic scenarios is often neglected and consequently some piezoresistive phenomena in polymeric materials are not fully understood. Models that incorporate both the electrical connection and disconnection mechanisms between particles in the conductive network as well as the visco-elastic properties of the elastomer can drastically improve our understanding of dynamic piezoresistive phenomena.
Contact: Dr.-Ing. Johannes Mersch
Johannes Kepler Universität Linz
Altenberger Straße 69
4040 Linz, Österreich
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