摘要
以红橡和黑胡桃木材为研究对象,采用X射线扫描方法测量常规热风干燥过程中木材厚度方向含水率分布和平均含水率的可行性。结果表明:采用X射线扫描无损检测方法可以实现干燥过程中同一木材试件含水率分布和平均含水率的动态检测;与称重法含水率测量值相比,在8%～68%的较宽含水率范围内,不论是在高含水率阶段还是在低含水率阶段,采用X射线扫描法测量木材含水率时,都具有较高的测量精度,测量值偏差最大不超过3%;在热风干燥过程中,所有试件含水率的称重法测定值与X射线扫描法测定值之间相关系数的平方都在0.97以上;X射线扫描方法具有扫描速度快、设备费用较低、测量精度高的特点,为木材含水率的动态检测提供了一种很好的技术手段。
Nondestructive X-ray scanning method was used to determine moisture content profile and mean moisture content of red oak （Quercus rubra） and walnut （Juglans nigra） samples during hot air drying. The moisture content measured by the nondestructive X-ray scanning method was compared with the corresponding ones measured by the traditional weighting method. It was found that the two methods were highly correlated with the correlation coefficient over 0.97. Within the range of moisture content between 8% and 68%,the maximum difference of measured moisture contents using the two methods was less than 3%. The result showed that the nondestructive X-ray scanning is a good method to continuously monitor moisture content profile and mean moisture content during wood drying,which could improve the drying efficiency and reduce the energy consumption.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2010年第2期122-127,共6页
Scientia Silvae Sinicae
基金
国家自然科学基金(30871983)
教育部重点项目基金(209089)
湖南省优秀青年基金(08B090)
关键词
X射线扫描
含水率
含水率分布
木材干燥
X-ray scanning
moisture content
moisture content profile
wood drying
