Millimeter-Wave Tomographic Imaging of Composite Materials
Science for Systems, Band 50
Dominik Meier
Hrsg.: Oliver Ambacher; Fraunhofer IAF, Freiburg
2021, 196 S., num., mostly col. illus. and tab., Softcover
Sprache: Englisch
Freiburg, Univ., Diss., 2021
Fraunhofer Verlag
ISBN 978-3-8396-1737-3

zur Open Access Version

Inhalt
To utilize the full potential of modern composite materials, new and innovative inspection methods are required to detect and classify defects, which are critical to the mechanical properties of the components. Ideally, such methods are non-contact, non-destructive, and can be applied during the manufacturing process, as well as during the complete lifespan of the components. Measurement systems based on millimeter waves meet these requirements, however, so far, such technologies are not used in an industrial environment, despite their potential of increasing the quality and efficiency of composite materials. Based on the propagation properties of millimeter waves, interacting with composite materials, the capabilities of such millimeter-wave-based measurement systems are investigated. Various measurement systems, operating at different frequency ranges within the millimeter wave spectrum, are developed to demonstrate the capabilities of such systems. This includes various signal-processing methods to provide an optimized evaluation of the measured signals, enabling high-resolution, non-destructive, and non-contact tomographic measurements with the presented measurement technology.

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