文献类型：期刊文献

中文题名：采用X射线扫描法测量木材含水率的初步研究

英文题名：Studies on measurement of moisture content by X-ray scanning method

作者：余乐[1] 吕建雄[1,2,3] 李贤军[1] 徐金梅[2] 郝晓峰[2] 蒋佳荔[2]

第一作者：余乐

机构：[1]中南林业科技大学材料科学与工程学院,湖南长沙410004;[2]中国林业科学研究院木材工业研究所,北京100091;[3]中国林业科学研究院国家林业局木材科学与技术重点实验室,北京100091

年份：2012

卷号：32

期号：1

起止页码：43-47

中文期刊名：中南林业科技大学学报

外文期刊名：Journal of Central South University of Forestry & Technology

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD_E2011_2012】；

基金：国家杰出青年科学基金(30825034);中南林业科技大学木材科学与技术国家重点学科资助项目

语种：中文

中文关键词：X射线扫描;含水率;木材;纹理方向

外文关键词：X-ray scanning; moisture content; wood drying; grain direction

分类号：S781.3

摘要：以杉木Cunninghamia lanceolata为研究对象,采用X射线扫描和称重法测量了恒温恒湿干燥过程中杉木平均含水率的变化规律,探讨了采用X射线法动态检测干燥过程中木材平均含水率的可行性,并进一步研究了纹理方向对X射线扫描法测量木材含水率精度的影响规律。结果表明:采用X射线扫描法测量干燥过程中木材平均含水率是切实可行的,其测量值与用称重法得到的含水率测量值十分接近,两者之间相关的决定系数在0.99以上,绝对偏差在2%以内;沿着木材径向和纵向扫描时,平均含水率的测量精度略高于沿着弦向扫描时的含水率测量精度,但其偏差不大,在实际测量中可以忽略不计;在实际生产中,采用X射线扫描法测量木材内的含水率分布时,可以不考虑纹理方向对测量精度的影响。
In order to explore the feasibility of using X-ray to measure moisture content m the drying process and have a mrther study on the effect of precision of moisture content when scanning through different grain directions, X-ray scanning method and weighting method were used to measure average moisture content of Cunninghamia lanceolata during hot air drying. The results show that the moisture content values of two methods were very close to one another, the determination coefficients of both were highly correlated with a valueover 0.99, and the absolute deviation was below 2%; when scanning along radial direction and longitudinal direction, the precisions of average moisture content were higher than that of the tangential direction, but the deviation can be negligible in the actual measurement; in the practical application, the effect of grain direction on precision of moisture content measurement could not be taken into account whenusing X-ray to measure the moisture distribution of wood.