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NDE of Decayed Wood with Ultrasonic CT

机译：用超声波CT NDE腐烂的木材

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Recently, a new ultrasonic CT system has been developed as the NDE method suitable for wood, In this system, several characteristics related to the ultrasound traveling in the woods such as the anisotropy of woods, existence of immature woods and ultrasound diffraction in the woods are considered during image composition process. In this study, we inspected the system that had been newly developed for the decayed wood specimen. We performed the ultrasound measurements to reconstruct the CT image. And then, we verified the distributions of each characteristic in the section by measuring the moisture content, specific gravity and compressive strength after cutting the measured specimen by small specimen again. The acquired results are compared with the CT image acquired in the same section. As a result, it is determined that it is possible to detect the locations and sizes of decayed parts in the wood by using the developed ultrasound CT system. In particular, the results show that the initial decays that the weight loss rate is less than 10% and the strength loss rate is less than 30% are also detectable.
机译：最近，新的超声波CT系统被开发为适用于木材的NDE方法，在该系统中，与在树林之类的外翻中行驶的超声波有关的几个特性，在树林中存在不成熟的树木和超声衍射。在图像组成过程中考虑。在这项研究中，我们检查了为腐烂的木质标本新开发的系统。我们执行了超声测量以重建CT图像。然后，通过再次通过小样品切割测量的样品，通过测量水分含量，比重和抗压强度，验证了该节中每个特征的分布。将获得的结果与在同一部分中获取的CT图像进行比较。结果，确定可以通过使用开发的超声CT系统检测木材中的衰减部件的位置和大小。特别地，结果表明，还检测到重量损失率小于10％，强度损耗率小于30％的初始衰减。

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