Published in tm - Technisches Messen
Automated vehicles rely on a precise intrinsic and extrinsic calibration of all sensors. An exact calibration leads to accurate localization and object detection results. Especially for sensor data fusion, the transformation between different sensor frames must be well known. Moreover, modular and redundant platforms require a large number of senso...
Published in tm - Technisches Messen
A central issue in Wireless Body Sensor Networks (WBSNs) is the large amount of measurement data for monitoring vital parameters, which need to be continuously measured, immediately processed and timely transmitted. This requires a big storage space and computing effort leading to a high-power consumption. Reducing the amount of transmitted data co...
Published in tm - Technisches Messen
Magnetic Resonance Velocimetry (MRV), an imaging method based on Magnetic Resonance Imaging (MRI), enables the measurement of flow parameters such as the velocity and the Reynolds Stress Tensor (RST) in complex structures without optical or physical access to the flow field. Several previous studies investigated the application of MRV velocity meas...
Published in tm - Technisches Messen
Die minimalinvasive Implantation einer Transkatheter-Aortenklappenprothese (TAVR) hat sich zur Standardtherapie für Patienten mit schwerer Aortenklappenstenose und erhöhtem Operationsrisiko etabliert. Postoperative Komplikationen, wie die subklinische Klappenthrombose, rufen langfristig eine Funktionsstörung der TAVR hervor, die ohne Revisionsthera...
Published in tm - Technisches Messen
Electrical impedance tomography (EIT) is an imaging method for characterizing the inner conductivity distribution of an object based on the measured boundary voltages resulting from the injection of an AC signal, followed by an image reconstruction procedure. An algorithm tries to solve an ill-posed inverse problem making it challenging to reconstr...
Published in tm - Technisches Messen
Artificial neural networks are used in various fields including spectral unmixing, which is used to determine the proportions of substances involved in a mixture, and achieve promising results. This is especially true if there is a non-linear relationship between the spectra of mixtures and the spectra of the substances involved (pure spectra). To ...
Published in tm - Technisches Messen
A method for the combined measurement of velocity and temperature fields in water using magnetic resonance velocimetry (MRV) is presented. MRV can provide accurate volumetric, time-averaged temperature and velocity field data. However, the choice of the flow medium and other materials is limited due to the requirements placed on the magnetic proper...
Published in tm - Technisches Messen
In der vorliegenden Arbeit werden Ergebnisse von Laser-Doppler-Anemometrie (LDA)-Geschwindigkeitsmessungen in einem einseitig mit transversal orientierten Rippen-Rauheiten strukturierten quadratischen Kanal für die Strömung mit einer Reynolds-Zahl von Re H = 5 , 0 · 10 4 {\mathit{Re}_{H}}=5,0\cdot {10^{4}} vorgestellt. Das Rippenabstand-Rippenhöhe-...
Published in tm - Technisches Messen
Published in tm - Technisches Messen
Although relevant in many technical applications, the removal of sessile droplets on surfaces by an (air-) flow is still hard to predict. The flow around the droplet has not been investigated in detail so far but knowledge on the flow structure is essential for the assessment of appropriate drag force correlation. Small droplets (in the range of 5–...
