THz-imaging: a new method for density mapping of wood
THz-imaging: a new method for density mapping of wood
复制标题
太赫兹成像：木材密度测绘的新方法
DOI：
10.1007/bf00702799
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发表时间：
1998
影响因子：
3.4
通讯作者：
J. Fromm
中科院分区：
文献类型：
--
作者：
Martin Koch;S. Hunsche;P. Schuacher;M. C. Nuss;Jochen Feldmann;J. Fromm
摘要本文提出了一种基于远红外光谱的快速、非侵入式木材密度测绘新技术。研究了 1.7 毫米厚的山毛榉在 0.1 至 2.5 THz 范围内的传输情况。在这个光谱范围内，我们发现木材相当透明，但密度不均匀性和结构细节（例如年轮）在透射剖面中变得可见。测得的吸收率与通过重力体积法独立获得的木材密度密切相关。因此，最终可以将太赫兹图像转换为二维密度图。
SummaryThis paper presents a new technique for fast and non-intrusive density mapping of wood based on far-infrared spectroscopy. The transmission of a piece of beech 1.7 mm thick is investigated between 0.1 and 2.5 THz. In this spectral range we find wood to be fairly transparent, but density inhomogeneities and structural details such as annual rings become visible in the transmission profile. The measured absorption correlates well with the wood density independently obtained by the gravitometric-volumetric method. Thus it finally becomes possible to transform the THz images into 2-dimensional density maps.