木材干燥应力是干燥过程中产生干燥缺陷的主要因素。文章根据数字散斑相关方法(DSCM)检测应力的原理设计出了一种非接触式无损检测木材干燥过程中应力的方法,用木材干燥表面测点位移的变化速率即应变速率来表示木材干燥过程中的应力状态,初步提出了建立木材干燥应力评价体系的设想。研究结果表明:木材表面测点位移变化量与时间存在着对数关系,与含水率变化量则呈线性关系。 Wood drying stress is the main factor in the drying process to produce dry defects. Based on the principle of digital speckle correlation method (DSCM) to detect stress, a nondestructive method for non-destructive testing of wood during drying process was designed. The rate of change of displacement at measuring point of wood drying surface, ie, strain rate, In the stress state, initially proposed the establishment of timber drying stress evaluation system. The results show that there is a logarithmic relationship between the displacement of measuring points on the surface of wood and the time, and a linear relationship with the variation of moisture content.