Nondestructive Evaluation of Microwave-Penetrable Pipes by Synthetic Aperture Imaging Enhanced by Full-Wave Field Propagation Model
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.
J. Laviada et al., "Nondestructive Evaluation of Microwave-Penetrable Pipes by Synthetic Aperture Imaging Enhanced by Full-Wave Field Propagation Model," IEEE Transactions on Instrumentation and Measurement, Institute of Electrical and Electronics Engineers (IEEE), Aug 2018.
The definitive version is available at https://doi.org/10.1109/TIM.2018.2861078
Electrical and Computer Engineering
Keywords and Phrases
Circular Synthetic Aperture Radar (SAR); Deconvolution; Green's Function; Microwave Imaging; Nondestructive Evaluation; Pipe Inspection
International Standard Serial Number (ISSN)
Article - Journal
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