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首页> 外文期刊>Wood Science and Technology >A new method for nondestructive evaluation of solid wood moisture content based on dual-energy X-ray absorptiometry
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A new method for nondestructive evaluation of solid wood moisture content based on dual-energy X-ray absorptiometry

机译：基于双能X射线吸光光度法的实木含水率无损评估新方法

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摘要

This paper presents a new method to determine the moisture content of solid wood based on the principle of dual-energy X-ray absorptiometry. The study investigates the theoretical relationship between X-ray wavelength and mass attenuation coefficients of wood, water, and reference substance. In accordance with this relationship, a theoretically obtained equation is proposed to calculate the moisture content in wood. The proposed equation is compared to experimental results using small blocks of sugi wood, which showed that the change in mass attenuation coefficient of wood with X-ray tube voltage increased with increasing moisture content as expected from the theoretical equation. A regression equation for moisture content estimation was determined based on the experimental results, and the standard error of estimate in the 0-120 ％ dry-basis moisture content range using the regression equation was determined to be 21.9 ％ with the most appropriate pair of tube voltages, 15 and 40 kVp. The accuracy of the method will be improved by reducing the duration of X-ray radiography and by increasing the disparity between paired tube voltages. This method has the potential to determine moisture content of solid wood using X-ray without oven-drying or assuming oven-dry density.
机译：本文提出了一种基于双能X射线吸光光度法测定实木含水率的新方法。该研究调查了X射线波长与木材，水和参考物质的质量衰减系数之间的理论关系。根据该关系，提出了理论上获得的方程式，以计算木材中的水分含量。将所提出的方程与使用小块sugi木材的实验结果进行比较，结果表明，随着理论公式的预期，随着X射线管电压的增加，木材的质量衰减系数随水分含量的增加而增加。根据实验结果确定了含水量估算的回归​​方程，使用最合适的试管对，在0-120％干基含水率范围内的估算标准误差确定为21.9％。电压为15和40 kVp。该方法的准确性将通过减少X射线射线照相的持续时间和增加成对的管电压之间的差异来提高。这种方法有可能使用X射线确定固体木材的水分含量，而无需烘干或假设烘干密度。

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  • 来源
    《Wood Science and Technology》 |2013年第6期|1213-1229|共17页
  • 作者

    Takashi Tanaka; Yasuo Kawai;

  • 作者单位

    Graduate School of Agriculture, Shizuoka University, Ohya 836, Suruga-ku, Shizuoka 422-8529, Japan;

    Institute of Wood Technology, Akita Prefectural University, Kaieizaka 11-1, Noshiro, Akita 016-0876, Japan;

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