Abstract
The use of non-metallic pipes and composite components that are low-cost, durable, light-weight, and resilient to corrosion is growing rapidly in various industrial sectors such as oil and gas industries in the form of non-metallic composite pipes. While these components are still prone to damages, traditional non-destructive testing (NDT) techniques such as eddy current technique and magnetic flux leakage technique cannot be utilized for inspection of these components. Microwave imaging can fill this gap as a favorable technique to perform inspection of non-metallic pipes. Holographic microwave imaging techniques are fast and robust and have been successfully employed in applications such as airport security screening and underground imaging. Here, we extend the use of holographic microwave imaging to inspection of multiple concentric pipes. To increase the speed of data acquisition, we utilize antenna arrays along the azimuthal direction in a cylindrical setup. A parametric study and demonstration of the performance of the proposed imaging system will be provided.
Highlights
Multiple Non-Metallic Pipes.Currently, non-metallic pipes and composite components such as fiber-reinforced plastic (FRP), glass-reinforced epoxy resin (GRE), high-density polyethylene (HDPE), reinforced rubber expansion joints (REJs), carbon fiber-reinforced plastic (CFRP), and polyvinyl chloride (PVC) are taking over metallic pipes and components due to advantages such as durability, low cost, light weight, resistance to corrosion, etc
We validate the performance of the proposed imaging technique via FEKO simulations for inspection of double concentric pipes
We present the study of the effect of important parameters on the proposed imaging technique
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations These SAR-based techniques use far-field assumptions, which impose imaging errors for NDT of the pipes. We propose the use of holographic imaging technique with arrays of antennas for inspection of multiple non-metallic pipes. The data acquisition is significantly expedited for longitudinally long structures such as pipelines, which, in turn, leads to faster inspection of such structures For this purpose, we first study the effect of important parameters such as defect size, number of frequencies, standoff distance of the antennas, and property of the fluids carried by the pipes. We demonstrate the performance of the proposed system through experimental results
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