Propagation Velocity Model and Two-dimensional Defect Imaging of Stress Wave in Larch (Larix gmelinii) Wood

文献类型： 外文期刊

第一作者： Wei, Xiwen

作者： Wei, Xiwen;Xu, Shuzheng;Sun, Liping;Wei, Xiwen;Tian, Cong;Du, Chunxiao

作者机构：

关键词： Stress wave; Orthogonal experiment method; Temperature; Twelve-directional stack imaging; Defect imaging

期刊名称：BIORESOURCES （ 影响因子：1.747； 五年影响因子：2.005 ）

ISSN： 1930-2126

年卷期： 2021 年 16 卷 4 期

页码：

收录情况： SCI

摘要： The propagation law of stress wave in larch (Larix gmelinii) wood was studied in this work. External factors affecting the propagation velocity of stress wave in wood cross-section were studied using the orthogonal experiment method. The most influential factors were shown by the experimental results, and the parameters of the propagation velocity model of stress wave in larch wood were optimized. Based on the optimized propagation velocity model, combined with the traditional defect determination method, a twelve-directional stack imaging (TDSI) steps system was developed for larch wood internal defect detection. The analysis results showed that of the three external factors of temperature, moisture content, and illumination duration, temperature had the greatest influence on the propagation velocity model of stress wave in larch wood cross-section. Using TDSI to image the defective larch wood not only can locate the defective area, but also it can achieve a high imaging precision of 95.52%, and the imaging precision is unrelated to the location of the defect, which has a good quantitative defect detection effect.

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