文献类型：期刊文献

中文题名：Research on Stress Wave Tomography of Spruce Logs with Artificial Defects under Different Number Sensors

英文题名：Research on Stress Wave Tomography of Spruce Logs with Artificial Defects under Different Number Sensors

作者：Chen Yongping[1] Liu Xiuying[1] Li Hua[1] Han Yang[2] Li Dongqing[2] Zhang Tao[2]

第一作者：陈勇平

机构：[1]Key Laboratory of Wood Science and Technology of State Forestry Administration,Research Institute of Wood Industry,Chinese Academy of Forestry;[2]Beijing Research Institute of Architectural Heritages

年份：2012

卷号：11

期号：3

起止页码：71-72

中文期刊名：Chinese Forestry Science and Technology

外文期刊名：中国林业科技（英文版）

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：北京市古建筑木结构安全状况无损检测技术研究与应用(Z090506016609002)

语种：英文

中文关键词：stress;wave;imaging;technology;precision;relative;error;defect;sensor

外文关键词：stress wave imaging technology precision;relative error;defect;sensor

分类号：S7

摘要：In order to raise the precision of stress wave imaging technology(SWIT),under the conditions of different area and outline of simulated cavity defects in timber discs of spruce,different number of used sensors,the relationship between imaging graph defects and real defects is studied. The result shows:SWIT can display graph of defects,the precision of imaging graph relates to rate of real defect area and area of the tested wood cross section,the number of used sensors and outline shape of the defects.When the rate rises from 1.6% to 25.0%,the relative error of graph defect area and real defect area drops from 22.6%to 9.7%.When the number of used sensors is from 6 to 24,the graph of SWIT can show the existence of real defect. But the number of sensors used influences the precision of SWIT.Outline shape of defects has certain effect on detection of defects.Under the condition of the same defect area,the defects of long and narrow shape are easy to be shown by graph.The relation error of defect area of suborbicular shape is smaller than that of long and narrow shape.
In order to raise the precision of stress wave imaging technology(SWIT),under the conditions of different area and outline of simulated cavity defects in timber discs of spruce,different number of used sensors,the relationship between imaging graph defects and real defects is studied. The result shows:SWIT can display graph of defects,the precision of imaging graph relates to rate of real defect area and area of the tested wood cross section,the number of used sensors and outline shape of the defects.When the rate rises from 1.6% to 25.0%,the relative error of graph defect area and real defect area drops from 22.6%to 9.7%.When the number of used sensors is from 6 to 24,the graph of SWIT can show the existence of real defect. But the number of sensors used influences the precision of SWIT.Outline shape of defects has certain effect on detection of defects.Under the condition of the same defect area,the defects of long and narrow shape are easy to be shown by graph.The relation error of defect area of suborbicular shape is smaller than that of long and narrow shape.