FFT-Estimation of Fiber Orientation on Wood Fiberboard.
FFT-Estimation of Fiber Orientation on Wood Fiberboard.
复制标题
木纤维板上纤维取向的 FFT 估计。
DOI：
10.2472/jsms.48.77
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
M. Fujita
中科院分区：
文献类型：
--
作者：
K. Murata;M. Fujita
许多工程木材的性能取决于其元素的形状和方向。本文介绍了一种估算绝缘纤维板（IB）中纤维三维取向的方法。用滑动切片机在平行于板平面的每50ƒÊm处切下IB的连续切片。切片前，将标本包埋在环氧树脂中固化。然后，在水中煮几个小时，使树脂适度软化。利用二维傅里叶变换对图像进行分析，计算出图像的取向值。分析值表明，两表面附近的纤维朝向机床方向，而内平面上的纤维朝向减小。截面厚度对取向值有影响。在太细的截面上，由于纤维碎片化，该值被低估了。另一方面，过于厚实的切片上纤维重叠的模糊图像也低估了价值。提出了寻找合适厚度的一些思路。
The property of many engineering woods depends on the shape and orientation of their elements. This paper describes an attempt to estimate the 3-dimensional fiber orientation in insulation fiberboard (IB). Serial sections of IB were sliced off at every 50ƒÊm parallel to the board plane by a sliding microtome. Before sectioning, the specimen was embedded in epoxy resin and cured. Then, it was boiled in water for several hours to make the resin moderately soften. The orientation values were calculated on 2-dimensional Fourier transform image analysis. Analytical value indicates that fibers near the both surfaces orient to machine direction and the orientations decrease on inner plane. Section thickness was shown to affect the orientation values. The value was underestimated on a too thin section, because fibers are fragmented. On the other hand, obscure image of overlapping fibers on a too thick section gave also underestimated value. Some ideas are proposed to search for appropriate thickness.