Application of Drill Resistance and Computed Tomography for Detecting Annual Rings

XU Qian; ZHOU Yu; ZHOU Haibin

doi:10.12326/j.2096-9694.2025080

KEY SCIENTIFIC RESEARCH BASE OF HISTORICAL BUILDING WOOD | Views : 0 下载量: CSCD: 0 CNKI被引量: 0 Crossref: 0 Wos: 0 Scopus: 0 更多指标

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Application of Drill Resistance and Computed Tomography for Detecting Annual Rings
1.Research Institute of Wood Industry，Chinese Academy of Forestry，Beijing 100091，China
2.Key Scientific Research Base of Traditional Building Wood，State Administration of Cultural Heritage，Beijing 102308，China
Vol. 39, Issue 5, Pages: 10-19(2025)
DOI： 10.12326/j.2096-9694.2025080
稿件说明：

移动端阅览

许倩,周宇,周海宾.阻抗法与计算机断层扫描法在木材年轮检测中的应用研究[J].木材科学与技术,2025,39(05):10-19. DOI： 10.12326/j.2096-9694.2025080.

XU Qian,ZHOU Yu,ZHOU Haibin.Application of Drill Resistance and Computed Tomography for Detecting Annual Rings[J].Chinese Journal of Wood Science and Technology,2025,39(05):10-19. DOI： 10.12326/j.2096-9694.2025080.

摘要

木构件年轮宽度和数量是古建筑断代的重要参考依据，其测量方法需平衡文物保护需求和结果准确性。依据我国北方古建筑木构件常见用材特点，选择采自华北落叶松（

Larix gmelinii

var.

principis-rupprechtii

）和黑防3号杨（

Populus deltoides

Populus cathayana

）的不同部位（树高1 200~1 400 mm和2 400~2 600 mm）的木材样品为研究对象，分别利用微损的阻抗法（drill resistance，DR）和无损的计算机断层扫描法（computed tomography，CT），并以传统断面拍照法为参照，分析比较DR和CT在年轮宽度检测和年轮数量检测的准确性和适用性。研究结果表明，CT在年轮宽度检测和年轮数量检测方面均优于DR，DR年轮宽度检测精度与CT相差在3%之内，DR较高的年轮数量检测错误率主要是其检测路径难以准确经过髓心而导致。采用CT和DR进行年轮检测时，应优先选取生长稳定、年轮特征清晰的树种作为检测对象，在树干无明显缺陷的区域实施检测，同时，检测高度的确定应充分考虑木材的生长特性，以确保检测结果的科学性与可靠性。

Abstract

The width and number of annual rings are a good reference for dating the timber components in ancient architecture

which is needed to balance the requirements of cultural relics and measurement accuracy. Larch (

Larix gmelinii

var.

principis-rupprechtii

) and poplar (

Populus deltoides

Populus cathayana

) were commonly used for constructing buildings in ancient China. The wood samples were obtained at heights of 1 200~1 400 mm and 2 400~2 600 mm from these trees. The drill resistance (DR) and computed tomography (CT) methods were used and compared with the traditional photography method applied on transverse surface of wood. The results showed that CT was superior to DR in detection of both annual

ring width and number. The accuracy of DR in tree-ring width detection differed from that of CT by less than 3%. The large error appeared in detection of annual ring number using DR

which was mainly due to the difficulty of its detection path accurately passing through the pith. When CT and DR were employed to measure annual rings

tree species with stable growth and clear annual rings should be prioritized

and the measurements should be carried out at the trunk without obvious defects. The detection height should be determined based on the growth characteristics of the wood.

关键词

Keywords

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