Defect reconstruction by non-destructive testing with laser induced ultrasonic detection
This work envisages a detailed study of two-dimensional defect localization and reconstruction, using laser generated ultrasound and its application as a remotely controlled non-destructive testing method. As an alternative to full ultrasonic or full optical approaches, we propose a hybrid configura...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/177672 |
| Acceso en línea: | https://hdl.handle.net/2117/177672 https://dx.doi.org/10.1016/j.ultras.2019.106000 |
| Access Level: | acceso abierto |
| Palabra clave: | Nondestructive testing Laser ultrasonics Defect reconstruction Non-destructive testing Synthetic aperture focusing technique 2D Apodization NDT SAFT B-scan Assaigs no destructius Àrees temàtiques de la UPC::Física |
| Sumario: | This work envisages a detailed study of two-dimensional defect localization and reconstruction, using laser generated ultrasound and its application as a remotely controlled non-destructive testing method. As an alternative to full ultrasonic or full optical approaches, we propose a hybrid configuration where ultrasound is generated by impact of laser pulses, while the detection is done with conventional transducers. We implement this approach for defect reconstruction in metallic elements and show that it combines advantages of both photonic and ultrasonic devices, reducing the drawbacks of both methods. We combine our experimental results with a high-resolution signal processing procedure based on the synthetic aperture focusing technique for the benefit of the final two-dimensional visualization of the defects. |
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