摘要
针对锯材的节子缺陷,基于空气耦合式超声波的传输系数与待测样本密度之间的关系,探索了空气耦合式超声波的节子缺陷检测新方法,并采用自行研制的空气耦合式超声波检测仪对杉木锯材试样进行检测,结果表明,空气耦合式超声波技术不仅能检测出锯材表面可见的节子缺陷,也可以有效检测不可见的内部节子缺陷。
Based on relationship between transmission coefficient of air-coupled ultrasonic wave and wood density,a new testing method for knot defect detection was developed.Experiments for detecting defects of Chinese fir specimens were conducted using a self-developed air-coupled ultrasonic imaging instrument.Results showed that the new method could be used in detecting not only visible knots on lumber surfaces,but also invisible segment defects inside lumbers.
作者
蒋昊
蔺陆军
郑红平
周德全
方益明
JIANG Hao;LIN Lu-jun;ZHENG Hong-ping;ZHOU De-quan;FANG Yi-ming(Jiyang College,Zhejiang A&F University,Shaoxing 311800,Zhejiang,China;School of Information Engineering,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China;Zhejiang Provincial Key Laboratory of Intelligent Monitoring in Forestry and Information Technology,Hangzhou 311300,Zhejiang,China)
出处
《木材工业》
北大核心
2019年第1期46-49,共4页
China Wood Industry
基金
浙江省基础公益研究计划项目"基于空气耦合式超声波的木材缺陷自动识别及定量检测"(LGG18F010006)
浙江省博士后择优资助项目"基于深度卷积神经网络的木材缺陷检测技术研究"(ZJ20180156)
国家级大学生创新创业训练计划项目"基于空气耦合式超声波木材扫描成像系统设计"(201713283004)
浙江省教育厅一般项目"基于超声信号多特征融合的木材内部缺陷识别方法研究"(Y201840496)
