Wüst M, Nierla M, Rupitsch S (2015)
Publication Language: English
Publication Type: Conference contribution, Conference Contribution
Publication year: 2015
Pages Range: 89-93
Conference Proceedings Title: 5th Scientific Symposium Proceedings
Event location: Dresden
ISBN: 978-3-00-050383-2
This paper is concerned with a technique to measure the geometric dimensions of flaws in a multi-layered structure by using an ultrasonic system for non-destructive testing (NDT). In order to achieve appropriate spatial resolution, an acoustic microscope working with a synthetic aperture focusing technique (SAFT) has to be established. However, standard SAFT algorithms are not matched with the individual geometry of the solid specimen perfectly. Therefore, a custom spatial filter kernel needs to be generated instead. For this purpose, we apply a semi-numerical approach, the so-called SIRFEM. Thereby, sound propagation in fluid coupling media is modeled by using the spatial impulse response (SIR). Against that mechanical waves within the solid specimen are simulated by a higher-order finite element method (FEM). We utilize SAFT with the custom spatial filter kernel to investigate a homogeneous sample containing a flaw as well as to a multi-layered one. An estimation of the obtained spatial resolution will be given and the imaging results will be compared with those of the standard B-mode.
APA:
Wüst, M., Nierla, M., & Rupitsch, S. (2015). Towards a model-based high-resolution ultrasonic measurement system for non-destructive testing. In DFG SFB/TR39 (Eds.), 5th Scientific Symposium Proceedings (pp. 89-93). Dresden.
MLA:
Wüst, Michael, Michael Nierla, and Stefan Rupitsch. "Towards a model-based high-resolution ultrasonic measurement system for non-destructive testing." Proceedings of the 5th Scientific Symposium, Dresden Ed. DFG SFB/TR39, 2015. 89-93.
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