Nondestructive Testing of Nonmetallic Pipes Using Wideband Microwave Measurements
Nondestructive Testing of Nonmetallic Pipes Using Wideband Microwave Measurements
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DOI：
10.1109/tmtt.2020.2969382
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发表时间：
2020-05-01
影响因子：
4.3
通讯作者：
Sharma, Raveena
中科院分区：
文献类型：
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作者：
Amineh, Reza K.;Ravan, Maryam;Sharma, Raveena
传统的无损检测技术不能有效地检测多根非金属管道中的缺陷。因此，在本文中，我们提出了一种基于近场微波全息成像和光束空间变换相结合的检测方法。这种方法通过测量近场区域的后向散射场来利用微波进行3D成像的能力。在所提出的技术中，我们通过使用光束空间变换来增强近场全息成像的解，该变换允许在求解过程中聚焦在每一根管道上。这提高了重建图像的质量，特别是对于距离测量天线更远的管道。首先，我们通过仿真演示了所提出的成像技术的性能。然后，我们给出了利用宽带微波数据对聚氯乙烯(PVC)同心圆柱管成像的实验结果。
Conventional nondestructive testing techniques do not suffice to efficiently inspect the defects in multiple nonmetallic pipes. Thus, in this article, we propose a novel method for inspection of these components based on near-field microwave holographic imaging augmented with beamspace transformation. This approach harnesses the ability of microwaves for 3-D imaging by measuring the backscattered fields in the near-field region. In the proposed technique, we augment the solution of near-field holographic imaging through the use of beamspace transformation which allows for focusing on each pipe during the solution process. This improves the quality of the reconstructed images, in particular, for the pipes which are further away from the measuring antennas. First, we demonstrate the performance of the proposed imaging technique using simulations. Then, we present the experimental results for imaging of concentric cylindrical polyvinyl chloride (PVC) pipes using wideband microwave data.