木材、竹材密度的CT技术检测  

Measuring the Density of Wood and Bamboo Using Computed Tomography

作　　者：彭冠云[1] 江泽慧 刘杏娥 余雁 杨淑敏 邓彪[1] 肖体乔[1] 王晓欢[3] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]国际竹藤中心,北京100102 [3]国家林业局北京林业机械研究所,北京100029

出　　处：《光谱学与光谱分析》2012年第7期1935-1938,共4页Spectroscopy and Spectral Analysis

基　　金：国家"十一五"科技支撑计划课题(2008BADA9B03;2006BAD19B01);国家重点基础研究发展计划项目(2010CB834301);国家自然科学基金项目(10805071);国际竹藤中心基本科研业务费(1632010002)资助

摘　　要：CT在木质材料无损检测中应用日趋广泛,其密度检测是这一应用的关键技术之一。本文用CT对木材、竹材气干材密度进行了研究。通过分析气干材密度(0.303～1.061g.cm-3)与相应CT值的相互关系,获得24种木材气干材密度与相应CT值之间的线性模型,以及25种木质材料(24种木材及1种竹材)气干材密度与其CT值的混合数学线性模型,相关系数R均达0.99以上,实现了木质材料密度的高效连续精确无损检测,是木质材料CT技术量化检测的突破,为CT技术更好应用于木竹材科学研究与生产加工提供了技术支持和参考依据。CT is widespread non-destructive detection technique for wood materials, and the density measurement is a key role during this application. In the present report, the use of CT for air-dry density measurement of wood and bamboo is described. The authors found that there were marked linear correlations between air-dry density（0. 303- 1. 061 g · cm^-3 ） of 24 kinds of woods and their respective CT value, as well as 25 kinds of lignin materials （including 24 kinds of woods and 1 kind of bamboo） and the CT value, both with correlation coefficient of 0. 99, which belonged to the CT technological breakthrough for wood quantitative detection. These research results show that CT is an appropriate way to measure density for wood and bamboo, and would provide technical support for CT used in the field of wood science research and wood processing.

关 键 词：木材 竹材 气干密度 计算机断层扫描 无损检测 

分 类 号：O657.3[理学—分析化学]