CAJ | 학술논문

木材无损检测技术是高效利用木材的方法之一.该文阐述了应力波法检测木材缺陷的原理,分析了传感器数量对图像的拟合度和误差率两个指标的影响.结果表明,当原木直径在20～40cm范围内时,若需对原木缺陷进行精确测量,要求图像拟合度接近90%和误差率在0.1左右时,至少需12个传感器才能满足要求;当不需要对原木缺陷进行精确测量,只需确定缺陷的大致位置时,宜选用10个传感器进行测量;当仅仅需要判断原木是否存在缺陷时,选用6个传感器就能满足要求.图3表4参8.
목재무손검측기술시고효이용목재적방법지일.해문천술료응력파법검측목재결함적원리,분석료전감기수량대도상적의합도화오차솔량개지표적영향.결과표명,당원목직경재20～40cm범위내시,약수대원목결함진행정학측량,요구도상의합도접근90%화오차솔재0.1좌우시,지소수12개전감기재능만족요구;당불수요대원목결함진행정학측량,지수학정결함적대치위치시,의선용10개전감기진행측량;당부부수요판단원목시부존재결함시,선용6개전감기취능만족요구.도3표4삼8.
Wood nondestructive testing (NDT) is one of the high efficient methods in utilizing wood. This paper explained the principle of log defect testing by using stress wave, and analyzed the effects of sensor quantity on defect testing results by using stress wave in terms of image fitting degree and error rate. The results showed that for logs with diameter ranging from 20 to 40 cm, at least 12 sensors were needed to meet the requirement which ensure a high testing accuracy of roughly 90% of fitness with 0.1 of error rate. And 10 sensors were recommended to judge the possible locations of defects and 6 sensors were sufficient to decide whether there were defects or not.