应变片和轴向生长应变仪法测试树木轴向表面生长应变

作     者：刘晓丽 姜笑梅 殷亚方 Liu Xiaoli;Jiang Xiaomei;Yin Yafang

作者机构：中国林业科学研究院木材工业研究所北京100091 

出 版 物：《林业科学》 (Scientia Silvae Sinicae)

年 卷 期：2005年第41卷第2期

页      面：210-214页

核心收录：

学科分类：0907[农学-林学] 08[工学] 0829[工学-林业工程] 09[农学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程] 

基　　金：国际热带木材组织ITTO项目 (PD 69 0 1) 国家自然科学基金项目 ( 3 0 3 0 0 2 70 )资助 

主　　题：生长应变 应变仪 应变片 轴向 表面 树木 测试 

摘      要：In this paper, CIRAD-Foret method and strain gauge method were used to measure the longitudinal surface growth strains released from fallen woods. Comparison was also done between two methods for measurements at the same point (sawing grooves inside the position pins)and at two points. Results showed that the values obtained from the CIRAD-Foret method were bigger than those from strain gauge method. The former was 1.3 times as high as the latter for the measurement at two points, and it was 2.0 times as high as the latter for the measurement at the same point. There was no distinct difference in the longitudinal surface growth strains from strain gauge method with measuring way at the same point and two points. However, the differences were obvious for the strains from CIRAD-Foret method with two measuring ways. They indicated that there was little effect on the values from strain gauge method with measuring way at the same point or at two points, and that the measuring way would influence measured result when CIRAD-Foret method was applied. In general, in comparison with CIRAD-Foret method, strain gauge method was more stable.