基于电阻层析成像的古树病变无损检测方法研究  

Research on Non-Destructive Testing Method for Ancient Tree Lesions Based on Electrical Resistance Tomography Imaging

作　　者：党红云 许景辉[2] 刘敏 DANG Hong-yun;XU Jing-hui;LIU Min(Shaanxi Energy Institute,Xianyang 712000,Shaanxi,P.R.China;Northwest A&F University,Yangling 712100,Shaanxi,P.R.China)

机构地区：[1]陕西能源职业技术学院,陕西咸阳712000 [2]西北农林科技大学,陕西杨凌712100

出　　处：《林产工业》2024年第8期26-31,38,共7页China Forest Products Industry

基　　金：国家自然科学基金(52279046;U2243235);陕西能源职业技术学院科研课题(2021KYP08);陕西能源职业技术学院低碳清洁能源与智能制造科研创新团队(2021KYTD06)。

摘　　要：古树因病变、气候等原因会造成树干空洞、脱水、腐蚀,加速树木衰老,甚至提前死亡。为实现古树病害检测,本研究建立了一种快速、准确的古树健康无损检测方法。选取7种不同病变的树木,将8颗探针固定在古树树干,结合电阻层析成像技术,分析树木的电流场,通过ERT逆问题重构古树内部图像。经实际验证,该方法能够准确完成榉木16%~43%含水率的检测,准确识别直径为14 cm泡桐树干中1.2~2.5 cm的空洞和腐烂位置及数量。结果表明,应用电阻层析成像技术能够对古树空洞、脱水等病变进行有效检测。研究结果可为古树可视化无损检测提供新方法,对于古树保护、延长古树生命具有重要意义。Due to pathological changes,climate and other reasons,ancient trees can cause hollow trunks,dehydration,corrosion,accelerate tree aging,and even premature death.To achieve the detection of ancient tree diseases,a fast and accurate non-destructive testing method for the health of ancient trees has been established in this study.Seven different types of trees with different lesions were selected,and eight probes were fixed on the trunk of ancient trees.Combined with electrical resistance tomography technology,the current field of the trees was analyzed,and the internal image of the ancient trees was reconstructed using the ERT inverse problem.Through practical experiments,this method was able to accurately detect the moisture content of 16%~43%of beech wood,and accurately identify the positions and quantities of voids and decay in the trunk of paulownia trees with a diameter of 14 cm,ranging from 1.2~2.5 cm.The results indicated that the application of electrical resistance tomography technology can effectively detect lesions such as cavities and dehydration in ancient trees.The research results could provide a new method for visual non-destructive testing of ancient trees,which was of great significance for the protection and extension of ancient tree life.

关 键 词：古树保护 病变检测 电阻层析成像 图像重建 无损检测 

分 类 号：TS6[轻工技术与工程] TS396