Model Based Filtering Of Interfering Signals In Ultrasonic Time Delay Estimations
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Model-based Filtering of Interfering Signals in Ultrasonic Time Delay Estimations
Author: Bächle, Matthias
language: en
Publisher: KIT Scientific Publishing
Release Date: 2023-01-09
This work presents model-based algorithmic approaches for interference-invariant time delay estimation, which are specifically suited for the estimation of small time delay differences with a necessary resolution well below the sampling time. Therefore, the methods can be applied particularly well for transit-time ultrasonic flow measurements, since the problem of interfering signals is especially prominent in this application.
Light Field Imaging for Deflectometry
Author: Uhlig, David
language: en
Publisher: KIT Scientific Publishing
Release Date: 2023-07-14
Optical measurement methods are becoming increasingly important for high-precision production of components and quality assurance. The increasing demand can be met by modern imaging systems with advanced optics, such as light field cameras. This work explores their use in the deflectometric measurement of specular surfaces. It presents improvements in phase unwrapping and calibration techniques, enabling high surface reconstruction accuracies using only a single monocular light field camera.
Machine Learning for Camera-Based Monitoring of Laser Welding Processes
Author: Hartung, Julia
language: en
Publisher: KIT Scientific Publishing
Release Date: 2024-03-08
The increasing use of automated laser welding processes causes high demands on process monitoring. This work demonstrates methods that use a camera mounted on the focussing optics to perform pre-, in-, and post-process monitoring of welding processes. The implementation uses machine learning methods. All algorithms consider the integration into industrial processes. These challenges include a small database, limited industrial manufacturing inference hardware, and user acceptance.