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Radio Frequency Tomography for Nondestructive Testing of Pillars

机译：用于非破坏性测试的射频断层扫描

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摘要

Pillars represent some of the commonest supporting elements of modern and historical buildings. Nondestructive testing methods can be applied to gain information about the status of these structural elements. Among them, ground penetrating radar (GPR) is a popular diagnostic tool for the assessment of concrete structures. Despite several theoretical and experimental studies on concrete structural evaluation by GPR have been reported, little work has been done so far with respect to pillars. Owing to their circular geometry, pillars are complex multiscattering environments, which render the interpretation of the radar images very challenging. This article deals with the application of radio frequency tomography as a nondestructive technique for imaging the inner structure of pillars. The main goal of the study is the assessment of the imaging performance that can be obtained in comparison to conventional GPR exploiting a multimonostatic configuration. Accordingly, potentialities and performance of multimonostatic and multiview/multistatic measurement configurations are herein investigated in the inverse scattering framework. For each measurement configuration, the regularized reconstruction of a point-like target and the spectral content are evaluated. The data inversion is carried out by means of the truncated singular value decomposition scheme. Tomographic reconstructions based on full-wave synthetic data are shown to support the comparative analysis.
机译：支柱代表现代和历史建筑的一些最常见的配套元素。无损检测方法可以应用于获得关于这些结构元素的状态的信息。其中，地面穿透雷达（GPR）是用于评估混凝土结构的流行诊断工具。尽管据报道了关于GPR的具体结构评估的几个理论和实验研究，但到目前为止，距离柱而几乎没有作用。由于它们的圆形几何形状，柱是复杂的多彩色环境，这使得雷达图像的解释非常具有挑战性。本文涉及射频断层扫描的应用作为一种非破坏性技术，用于成像柱的内部结构。该研究的主要目的是评估与常规GPR利用多用户配置的传统GPR可以获得的成像性能。因此，本文在逆散射框架中研究了多语言和多视图/多晶测量配置的潜在和性能。对于每个测量配置，评估点状目标的正则化重建和光谱内容。通过截短的奇异值分解方案来执行数据反转。基于全波合成数据的断层性重建被示出支持对比分析。

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