Nondestructive Evaluation of Microwave-Penetrable Pipes by Synthetic Aperture Imaging Enhanced by Full-Wave Field Propagation Model
| Autor: | Jaime Laviada, Reza Zoughi, Mohammad Tayeb Ghasr, Baolong Wu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Synthetic aperture radar
Computer science business.industry Matched filter Acoustics 020208 electrical & electronic engineering ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION 02 engineering and technology Dielectric symbols.namesake Fourier transform Microwave imaging Sampling (signal processing) Nondestructive testing 0202 electrical engineering electronic engineering information engineering symbols Electrical and Electronic Engineering business Instrumentation Microwave |
| Zdroj: | Scopus RUO. Repositorio Institucional de la Universidad de Oviedo instname |
| ISSN: | 1557-9662 0018-9456 |
| Popis: | A qualitative approach for microwave imaging multilayered cylindrical structures (e.g., dielectric pipes) is proposed in this paper. This approach relies on a modified circular synthetic aperture imaging technique that exploits closed-form Green’s function to account for the different propagation delays, internal reflections, and refractions. The image can then be computed by employing a matched filter expressed in terms of efficient Fourier Transforms. Consequently, a high-resolution and contactless approach for the inspection of this kind of structures is achieved. Moreover, the computational resources to render the images are negligible. Practical aspects of the technique such as sampling criteria, resolution, and limitations of the technique are discussed. The efficacy of the method is illustrated via several examples including imaging of objects and anomalies inside different types of dielectric pipes. |
| Databáze: | OpenAIRE |
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