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Possibilities to Enhance Tomography Imaging of Concrete Structures by the Full Waveform Inversion
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lahmer, T. Schickert, Martin Reichert, Ina |
| Copyright Year | 2019 |
| Abstract | It is a state of the art to test concrete specimen with ultrasonic-based methods. However, due to the density and the required high resolution, the testing is done with highfrequency waves which cannot penetrate the structure in depth. Adopting techniques used, e.g., in geotechnical applications, a model-based inversion using higher wavelengths is proposed, which is the full waveform inversion. This approach is however non-linear, time-consuming and highly ill-posed. Thus, further developments are necessary to make the technique applicable to structures like dams, dikes or similar. Among these developments are further accelerations of the so-called forward codes by a more efficient implementation of the wave equation. To handle with the ill-posedness, regularization techniques need to be applied and tested in order to reduce the risk of incorporating too many and misleading artifacts in the resulting images. This, e.g., can be done by the consideration of a priori knowledge of the material properties inside a structure which could be taken from already well-established inspection methods. Some first results, mainly based on synthetic data, will be presented to show the capabilities of the model-based approach. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.ndt.net/article/smar2019/papers/Tu.3.D.4.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
