[1]王玉婷,徐华东*,王立海,等.环境温度对活立木横截面电阻值的影响[J].南京林业大学学报(自然科学版),2016,40(04):143-148.[doi:10.3969/j.issn.1000-2006.2016.04.023]
 WANG Yuting,XU Huadong*,WANG Lihai,et al.Effects of environmental temperature on the electrical resistanceon the cross section in standing tree[J].Journal of Nanjing Forestry University(Natural Science Edition),2016,40(04):143-148.[doi:10.3969/j.issn.1000-2006.2016.04.023]
点击复制

环境温度对活立木横截面电阻值的影响
分享到:

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

卷:
40
期数:
2016年04期
页码:
143-148
栏目:
研究论文
出版日期:
2016-08-30

文章信息/Info

Title:
Effects of environmental temperature on the electrical resistance on the cross section in standing tree
文章编号:
1000-2006(2016)04-0143-06
作者:
王玉婷徐华东*王立海刘泽旭王兴龙孙雨婷
东北林业大学工程技术学院,黑龙江 哈尔滨 150040
Author(s):
WANG Yuting XU Huadong* WANG Lihai LIU Zexu WANG Xinglong SUN Yuting
College of Engineering and Technology, Northeast Forestry University, Harbin 150040, China
关键词:
活立木 环境温度 电阻断层成像 横截面
Keywords:
standing trees environmental temperature electrical resistance tomography cross section
分类号:
S781.2
DOI:
10.3969/j.issn.1000-2006.2016.04.023
文献标志码:
A
摘要:
为研究环境温度对活立木内电阻值的影响,采用树木电阻断层成像仪在不同温度下对落叶松和小叶杨两种活立木进行检测,获取截面二维电阻图像并分析其变化,量化横截面内各点电阻值及其与温度之间的关系。结果表明:①落叶松横截面心材电阻值较低,边材较高。随温度降低,边材红色区域(高电阻区)面积减少,心材蓝色区域(低电阻区)面积增大; 而小叶杨电阻图像呈现完全相反的规律。但随温度降低,两树种整体平均电阻值均增大。②样本立木电阻值与环境温度之间存在极显著的指数函数关系(P<0.01),模型相关系数R≥0.822,小叶杨甚至高于0.926,因此认为模型有很好的拟合优度。 ③在落叶松样本立木中,当温度大于0 ℃时,横截面内沿径向分布的各点电阻值之间变化不明显,最大差值为1 236 Ω(3.0 ℃时); 而温度小于0 ℃时波动很大,最大差值达到3 299 Ω(-5.0 ℃时),曲线存在较为明显的两个波谷和中间一个波峰。④在小叶杨样本立木中,随环境温度降低,横截面内沿径向分布的各点电阻值都呈增大趋势; 从边缘到髓心再到另一侧边缘,沿径向分布的电阻值呈由低向高逐渐增大、到最大值后再逐渐降低的趋势。
Abstract:
In order to investigate the effect of environmental temperature on the internal electrical resistance value of standing trees, two standing tree(Larix gmelinii and Populus simonii)specimens were selected and tested using the electrical impedance tomography instrument at different environmental temperatures. Some two-dimensional electrical impedance images of cross section of specimens were then obtained and comparatively analyzed. The electrical resistance value of each point on the cross section was quantitatively examined and the relationship between these values and temperature were discussed. Research results showed that: ① For L. gmelinii, the electrical resistance value of heartwood was lower than that of the sapwood. As temperature decreased, the red area(high resistance region)at sapwood reduced and the blue area(low resistance region)at heartwood increased. For P. simonii, the result was completely opposite. However, the average electrical resistance values for overall cross section increased as temperature decreased. ② There were highly significant exponential regression models between the sample electrical resistance values and temperature(P<0.01)with the correlation coefficients of ≥0.822(L. gmelinii)and ≥0.926(P. simonii). ③ For L. gmelinii, when temperatures were above 0 ℃, the fluctuation of radial resistance value was not obvious, and the maximum difference was 1 236 Ω(at 3.0 ℃). When temperatures were below 0 ℃, it fluctuated greatly, and the maximum difference was 3 299 Ω(-5.0 ℃). There are two troughs and one peak in the middle of the trend line. ④ For P. simonii, the resistance value of each point in the radial direction showed a trend of increase with the decrease of temperature. The resistance value increased initially and then decreased from one edge to the other in the radial direction.

参考文献/References:

[1] Skutt H R, Shigo A L, Lessard R A. Detection of discolored and decayed wood in living trees using a pulsed electric current[J]. Canadian Journal of Forest Research, 1972, 2(1): 54-56. Doi:10.1139/x72-010.
[2] Tattar T A, Shigo A L, Chase T. Relationship between the degree of resistance to a pulsed electric current and wood in progressive stages of discoloration and decay in living trees[J]. Canadian Journal of Forest Research, 1972, 2(3): 236-243. Doi:10.1139/x72-039.
[3] Shigo A L, Shigo A. Detection of discoloration and decay in living trees and utility poles[R]. USDA Forest Service Research Paper NE-294, 1974.
[4] Bengtsson B. Anordning och användning vid detektering av rötaangreppi biologiskt material, företrädesvis träd. Swedish Patent: 9703540-6[P]. 1997-06-08.
[5] Just A, Jacbbs F. Elektrische widerstandstomographie zur untersuchung des gesundheitszustandes von bäumen VII[C]//Seminar Hochauflösende Geoelektrik. Universität Leipzig, Institut für Geophysik und Geologie, 1998.
[6] Bieker D, Rust S. Electric resistivity tomography shows radial variation of electrolytes in Quercus robur[J].Canadian Journal of Forest Research, 2010, 40(6): 1189-1193.
[7] Lin C J, Chung C H, Yang T H, et al. Detection of electric resistivity tomography and evaluation of the sapwood-hearwood demarcation in three Asia Gymnosperm species[J]. Silva Fennica, 2012, 46(3): 415-424.
[8] Brazee N J, Marra R E, Göke L, et al. Non-destructive assessment of internal decay in three hardwood species of northeastern North America using sonic and electrical impedance tomography[J]. Forestry, 2011, 84(1): 33-39. Doi:10.1093/forestry/cpq040.
[9] 刁秀明, 孙品. 木材电学性质与电测含水率计的使用[J]. 木材加工机械, 1993, 18(3):18-20. Doi:10.13594/j.cnki.mcjgjx.1993.03.008. Diao X M, Sun P. Electrical properties of wood and the use of electric moisture meter[J]. Wood Processing Machinery, 1993, 18(3):18-20.
[10] 杜洪双, 李荣, 修洪波, 等. 柞木干燥中电阻率与温度和含水率的关系[J]. 北华大学学报(自然科学版), 2002, 3(4):349-351. Doi:10.3969/j.issn.1009-4822.2002.04.029. Du H S, Li R, Xiu H B,et al. The relationship between resistivity and temperature and moisture content in dry oak[J]. Journal of Beihua University(Natural Science), 2002, 3(4):349-351.
[11] 徐速, 周启友, 刘汉乐. ERT法在树干水分运移监测中的运用[J]. 桂林工学院学报, 2006, 26(3):347-352. Doi:10.3969/j.issn.1674-9057.2006.03.007. Xu S, Zhou Q Y, Liu H L. The application of ERT method in the monitoring of trunk water movement[J]. Journal of Guilin University of Technology, 2006, 26(3):347-352.
[12] 吴华桥, 周启友, 刘汉乐. 树干水分分布及运移的高密度电阻率成像法时空监测[J]. 地球物理学进展, 2008, 23(4):1310-1316. Wu H Q, Zhou Q Y, Liu H L. Temporal and spatial monitoring of water distribution and migration in a tree trunk using electrical resistivity tomography[J]. Progress in Geophysics, 2008, 23(4):1310-1316.
[13] 吴华桥, 周启友, 刘汉乐, 等. 电阻率成像法在树干水分吸收过程研究中的应用[J]. 生态学杂志, 2009, 28(2):350-356. Wu H Q, Zhou Q Y, Liu H L,et al. Application of electrical resistivity tomography in studying water uptake process in tree trunk[J]. Chinese Journal of Ecology, 2009, 28(2):350-356.
[14] 王立海, 王洋, 高珊, 等. 冻结状态下应力波在长白落叶松立木中传播速度的研究[J]. 北京林业大学学报, 2009, 31(3):96-99. Doi:10.3321/j.issn:1000-1522.2009.03.017. Wang L H, Wang Y, Gao S,et al. Stress wave propagating velocity in Larix olgensis standing trees under a freezing condition[J]. Journal of Beijing Forestry University, 2009, 31(3):96-99.
[15] 鲍震宇, 王立海. 电阻测试法在立木腐朽检测中的应用研究进展[J]. 森林工程, 2013, 29(6):47-51. Doi:10.3969/j.issn.1001-005X.2013.06.012. Bao Z Y, Wang L H. Application of electrical resistance testing method in detection of decay in standing trees[J]. Forest Engineering, 2013, 29(6):47-51.

相似文献/References:

[1]王玉婷,徐华东,周涵婷,等.环境温度对活立木内部含水率变化的影响[J].南京林业大学学报(自然科学版),2017,41(05):107.[doi:10.3969/j.issn.1000-2006.201606096]
 WANG Yuting,XU Huadong*,ZHOU Hanting,et al.Effects of environmental temperatures on internal moisture content of standing trees[J].Journal of Nanjing Forestry University(Natural Science Edition),2017,41(04):107.[doi:10.3969/j.issn.1000-2006.201606096]

备注/Memo

备注/Memo:
收稿日期:2015-07-16 修回日期:2015-10-20
基金项目:国家自然科学基金项目(31300474); 黑龙江省自然科学基金面上项目(C201410); 中央高校基本科研业务费专项资金项目(2572015CB03); 国家林业局“948”项目(2014-4-78)
第一作者:王玉婷(2856881758@qq.com)。*通信作者:徐华东(huadongxu@yahoo.com),副教授。
引文格式:王玉婷,徐华东,王立海,等. 环境温度对活立木横截面电阻值的影响[J]. 南京林业大学学报(自然科学版),2016,40(4):143-148.
更新日期/Last Update: 2016-08-30