Fast, Robust, and Low-Cost Microwave Imaging of Multiple Non-Metallic Pipes

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.

Interconnect for Dense Electronically Scanned Antenna Array Using High-Speed Vertical Connector

“…Over the past decade, the development of electronically scanned antenna arrays (ESAAs) has been the focus of intense research since they outperform mechanically scanned systems with exceptional speed, compactness, lightweight, and immunity to positioning errors. These advantages make the ESAAs the preferred choice in applications such as wireless communications [1][2][3][4], radar systems [5,6], nondestructive testing [7,8], and microwave imaging [9][10][11][12], among others. In communications, these arrays enable dynamic beamforming, where the antenna pattern is shaped to maximize the signal power toward the desired receiver(s) and/or to minimize interference from other directions.…”

Simplistic, Efficient, and Low-Cost Crack Detection of Dielectric Materials Based on Millimeter-Wave Interference

“…crack detection including coaxial probes, open-ended waveguides, and time-reversal techniques. Extensive published works have focused on crack detection, crack sizing, and crack imaging [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Although these technologies are easy to implement, they all require accurate measuring of signal properties including frequency, amplitude, and phase.…”