[1]封丹,张厚江*,关炜盼. 面向质量评价的杨树苗木超声波检测方法研究[J].西北林学院学报,2017,32(2):260-264.[doi:10.3969/j.issn.1001-7461.2017.02.45]
 FENG Dan,ZHANG Hou-jiang*,GUAN Wei-pan. Ultrasonic Detecting Method for Evaluating the Quality of Poplar Seedlings[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2017,32(2):260-264.[doi:10.3969/j.issn.1001-7461.2017.02.45]
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 面向质量评价的杨树苗木超声波检测方法研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第32卷
期数:
2017年第2期
页码:
260-264
栏目:
出版日期:
2017-03-31

文章信息/Info

Title:
 Ultrasonic Detecting Method for Evaluating the Quality of Poplar Seedlings
文章编号:
1001-7461(2017)02-0260-05
作者:
 封丹张厚江*关炜盼
 (北京林业大学 工学院,北京 100083)
Author(s):
 FENG DanZHANG Hou-jiang*GUAN Wei-pan
 (School of Technology,Beijing Forestry University,Beijing 100083,China)
关键词:
 超声波杨树苗木质量波速检测
Keywords:
 ultrasonic wave poplar seedling quality wave velocity detecting
分类号:
S781.1
DOI:
10.3969/j.issn.1001-7461.2017.02.45
文献标志码:
A
摘要:
 一直以来,苗木质量的评价通常是根据苗木地径、苗高、根系等外观指标进行的,基本没有考虑到苗木内部材质状况。而苗木材质好坏会直接影响成材树的木材质量,因此从材质角度对苗木进行无损检测和质量评价是非常有意义的。超声波波速是反映木材材质的重要参数。以我国常见人工林树种杨树苗木为对象,利用超声波微秒计对200棵样苗在其生长第1年内进行了4次超声波传播速度测量,并在测量完波速以后随机砍伐其中的61棵苗木进行敲击回声试验,进行波速对比分析。试验发现,每次测量得到的200棵苗木波速呈近似正态分布;超声波波速与苗木生长天数之间存在很强的相关性,平均波速与生长天数之间的决定系数达到0.991;波速与苗木地径之间无明显相关性;超声波波速与敲击回声法测得的波速相关性显著,决定系数达0.805 4。研究结果表明,超声波法测得的波速可以作为反映被测苗木材质状况的指标之一。
Abstract:
 All along,the evaluation of seedling quality is usually based on the indices of external appearances,such as the diameter,height,and root,while the internal situation is not taken into account.Because seedling quality directly affects the wood quality of the timber trees,it is meaningful to do the nondestructive test and quality evaluation on the seedlings from the perspective of internal material.Ultrasonic velocity is an important parameter to reflect the wood material.This paper took the poplar seedlings as the objects of study which are commonly used in the artificial forest,the ultrasonic velocity of 200 samples were measured 4 times by the ultrasonic microsecond device in the first growth year.After measuring the wave velocity,the knocking echo test was carried out and the comparative analysis of wave velocity with 61 seedlings which were randomly cut down among the samples was conducted.It was found that the velocity of the 200 seedlings obtained from each measurement was approximately in normal distribution.There was a very strong correlation between the ultrasonic velocity and the growth days of the seedlings,the coefficient of determination between the average velocity and the growth day reached 0.991; there was nearly no significant correlation between the velocity and the seedling diameter; the correlation between the velocity with the two methods was significant,the coefficient of determination reached 0.805 4.The results indicated that the wave velocity measured by ultrasonic detecting method could be one of the indicators to reflect the wood quality of the seedlings.

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备注/Memo

备注/Memo:
 收稿日期:2016-08-01修回日期:2016-11-07
基金项目:国家自然科学基金项目“应力波在人工林活立木中的传播机理及波速转换模型的研究”(31328005)。
作者简介:封丹,女,在读硕士,研究方向:木材无损检测技术。E-mail:853078861@qq.com
*通信作者:张厚江,男,博士,教授,研究方向:木材无损检测技术。E-mail :hjzhang6@bjfu.edu.cn
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