Scientia Silvae Sinicae ›› 2021, Vol. 57 ›› Issue (9): 181-192.doi: 10.11707/j.1001-7488.20210918
• Scientific notes • Previous Articles
Tao Liu,Guanghui Li*
Received:
2020-05-06
Online:
2021-09-25
Published:
2021-11-29
Contact:
Guanghui Li
CLC Number:
Tao Liu,Guanghui Li. Stress Wave Tomography Imaging Algorithm Based on Ray Segmentation for Nondestructive Testing of Wood[J]. Scientia Silvae Sinicae, 2021, 57(9): 181-192.
Table 1
General information of log sample"
样本 Sample | 样本高度 Sample height/cm | 直径 Diameter/cm | 含水率 Moisture content(%) | 测量高度 Measuring height/cm | 缺陷尺寸 Decay size/cm | 传感器数量 Number of sensors |
雪松1 Cedrus deodara 1 | 30 | 27.6 | 12.5 | 25 | 健康Heath | 10 |
雪松2 Cedrus deodara 2 | 45 | 30.0 | 12.0 | 35 | 16 | 12 |
乌桕Sapium sebiferum | 25 | 30.0 | 13.1 | 20 | 9 | 12 |
红松Pinus koraiensis | 40 | 30.0 | 24.3 | 30 | 10 | 12 |
Table 2
General information of live trees"
样本 Sample | 周长 Circumference/cm | 测量高度 Measuring height/cm | 含水率 Moisture content(%) | 基本信息 General information |
圆柏1 Sabina chinensis 1 | 138 | 100 | 13.3 | 树木表面存在一些凸起不平处,部分树皮已经枯死 There are some bumps on the surface of the tree, and part of the bark has died |
圆柏2 Sabina chinensis 2 | 157 | 150 | 16.5 | 树木表面存在一条较大的裂缝 There is a large crack on the surface of the tree |
香樟 Cinnamomum camphora | 150 | 150 | 15.7 | 树木外观较为健康,仅有一条较小的裂缝 The appearance of the tree is relatively healthy, with only a small crack |
柳树 Salix spp. | 120 | 50 | 18.9 | 树干周围有真菌引起的异常 An abnormality caused by a fungus around the trunk |
Table 4
The Δl comparison results of HWPM and RSIA"
树种 Tree species | 路径 Path | l0/cm | HWPM | RSIA | |||
l1/cm | Δl(%) | l2/cm | Δl(%) | ||||
圆柏1 Sabina chinensis 1 | 1-7 | 35 | 38 | 8.6 | 33 | 5.7 | |
4-10 | 26 | 22 | 15.3 | 23 | 11.5 | ||
圆柏2 Sabina chinensis 2 | 6-12 | 4 | 0 | 100.0 | 0 | 100.0 | |
7-12 | 14 | 9 | 35.7 | 11 | 21.4 | ||
10-5 | 14 | 16 | 14.3 | 12 | 14.3 | ||
香樟 Cinnamomum camphora | 1-7 | 2 | 2 | 0 | 1 | 50 | |
3-10 | 0 | 2 | — | 0 | 0 | ||
6-2 | 3 | 5 | 66.7 | 1 | 66.7 | ||
柳树 Salix spp. | 3-7 | 1 | 1 | 0 | 1 | 0 | |
5-9 | 1 | 0 | 100.0 | 0 | 100.0 |
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