Despite sonic and ultrasonic tomography are major NDT techniques, the resolution and the capability of these tests could be substantially improved; this, especially for masonry structures. Moreover, although waves amplitude attenuation is strictly related to the internal features and to the defects, some experimental and theoretical issues obstruct practical applications of amplitude tomography for civil structures. Indeed, almost exclusively travel time tomography is employed. Here, a new approach for ultrasonic amplitude tomography called Standardized Amplitude Tomography (SAT) is proposed. This approach is based on a suitable formulation of the theoretical model to be implemented for the tomographic reconstruction of the internal features of materials and on the employ of a special experimental tool. SAT approach is primarily meant for application to masonry structures, but its principle is applicable to concrete or timber structural elements as well. The effectiveness of SAT is discussed by means of experimental tests on Apulian tuff specimens having known internal defects. The results obtained by the new SAT approach are compared to those obtained by the ordinary amplitude tomography and by the classical travel time tomography.

中文翻译：

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一种新的超声波振幅断层扫描方法，在砌体凝灰岩块上进行验证

尽管声波和超声波断层扫描是主要的 NDT 技术，但这些测试的分辨率和能力可以大大提高；这一点，特别是对于砖石结构。此外，尽管波幅衰减与内部特征和缺陷密切相关，但一些实验和理论问题阻碍了幅层成像在土木结构中的实际应用。实际上，几乎完全采用旅行时间断层扫描。在这里，提出了一种称为标准化振幅断层扫描 (SAT) 的超声振幅断层扫描新方法。该方法基于为材料内部特征的断层扫描重建而实施的理论模型的适当公式化，并基于特殊实验工具的使用。SAT 方法主要适用于砖石结构，但其原理也适用于混凝土或木材结构元素。SAT 的有效性通过对具有已知内部缺陷的阿普利亚凝灰岩样本进行实验测试来讨论。将新 SAT 方法获得的结果与普通振幅断层扫描和经典走时断层扫描获得的结果进行比较。