利用自由空间技术进行马来西亚木材分类的微波无损检测

H. Al-Mattarneh, Deepak K. Ghodgaonkar, W. Majid
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引用次数: 13

摘要

微波无损检测方法是一种快速、无接触、准确和连续的技术,用于评估木材的含水率、颗粒坡度、结密度和比重。木材的介电性能是由这些因素决定的。我们描述了如何通过使用自由空间测量系统在8-12.5 GHz频率范围内测量马来西亚木材样品的反射和透射系数来推断介电特性。通过电场与晶粒方向之间的不同角度,对其介电性能进行了评价。建立了马来西亚木材的密度、弹性模量、强度、颗粒角(颗粒方向与电场方向的夹角)与介电性能之间的关系。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Microwave nondestructive testing for classification of Malaysian timber using free-space techniques
Microwave nondestructive testing methods are fast, contactless, accurate and continuous techniques for the evaluation of moisture content, slope-of-grain, density of knots and specific gravity of timber. Dielectric properties of timber are determined by these factors. We describe how the dielectric properties were deduced from reflection and transmission coefficient measurements of Malaysian timber specimens using a free-space measurement system in the frequency range 8-12.5 GHz. Dielectric properties were evaluated over different angles between the electric field and the direction of grain. Relationships between density, modulus of elasticity, strength, grain angle (angle between the direction of grain and electric field) and dielectric properties of Malaysian timber were established.
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