A10.3 Model-based Optimization for Acoustic Characterization of Thin Hidden Layers
- SMSI 2021
2021-05-03 - 2021-05-06
- SMSI 2021 - Measurement Science
- A10 Inverse Problems in Measurements (Special Session)
- S. Wöckel, H. Arndt - ifak - Institut für Automation und Kommunikation e.V., Magdeburg (Germany)
- 241 - 242
This contribution discusses a model-based optimization method to identify hidden layers and estimate selected material properties gathered from acoustic data. The procedure is exemplified by non-contact air-coupled ultrasound inspections. The method implies a model fitting of the sound propagation in the multi layered media and a derivation of media properties with a genetic algorithm. The modelling and the estimation technique are evaluated with measurement and simulation data of ideal stacked solid and fluid layers, which are “thin” (< 1…10 mm) in relation to the acoustic wavelength (> 5 mm).