纸质文物表面木霉的反射式光纤光谱法无损检测  

Nondestructive Detection of Trichoderma on Surface of Paper Cultural Relics by Reflective Fiber Optic Spectroscopy

作　　者：陈焜 郭萌萌 石胜辉[1] 覃丹 罗彬彬[1] 蒋上海 赵明富[1] 唐欢[2] 谭博文 宋涛[1] 钟年丙[1] Chen Kun;Guo Mengmeng;Shi Shenghui;Qin Dan;Luo Binbin;Jiang Shanghai;Zhao Mingfu;Tang Huan;Tan Bowen;Song Tao;Zhong Nianbing(Chongqing Key Laboratory of Optical Fiber Sensor and Photoelectric Detection,Chongqing University of Technology,Chongqing 400054,China;Key Scientific Research Base of State Administration of Cultural Heritage for Pest,Control of Cultural Relics(Chongqing China Three Gorges Museum),Chongqing 400060,China)

机构地区：[1]重庆理工大学光纤传感与光电检测重庆市重点实验室,重庆400054 [2]馆藏文物有害生物控制研究国家文物局重点科研基地(重庆中国三峡博物馆),重庆400060

出　　处：《光学学报》2024年第20期53-64,共12页Acta Optica Sinica

基　　金：重庆市教育委员会科学技术研究项目(KJZD-K202201106);重庆市自然科学基金创新发展联合基金(CSTB2023NSCQLZX0008);重庆英才青年拔尖人才计划(CSTC2021YCJH-BGZXM0128);重庆理工大学科研创新团队(2023TDZ002);重庆中国三峡博物馆自立科研项目(3GM2022-KTZ07)。

摘　　要：为实现对纸质文物表面木霉生长过程的在线无损检测,设计了一种反射式内凹阶梯形斜面透镜光纤传感器。该传感器由中心1根入射光纤和内外层分别为6和12根接收光纤组成。建立了光纤传感器的检测原理,探究了传感器结构参数(入射光纤半径、接收光纤半径、光纤轴间距、光纤错位量和接收光纤倾斜角等)对传感器的检测灵敏度的影响,并进行了数值仿真。根据仿真结果制作最优性能的光纤传感器,并利用传感器对纸质文物样品表面的长梗木霉生长过程进行了在线检测。实验结果表明,该传感器对棉纸和毛边纸表面长梗木霉的特征吸收峰均为270 nm,吸收峰对应的吸光度与霉菌生长高度呈线性关系,对应的检测灵敏度分别为9.3×10^(-4)AU/μm和10.4×10^(-4)AU/μm。所设计的光纤传感器能对染墨前后棉纸和毛边纸表面的长梗木霉生长情况进行在线检测和准确识别,在纸质文物的霉菌防治领域具有良好的应用前景。Objective Cultural relics serve as tangible remnants of human activities and invaluable cultural heritage passed down from ancient to modern societies.They encapsulate diverse aspects of human life and culture,encompassing social systems,economic activities,technological advancements,and ideological frameworks.Among these relics,paper artifacts stand out as crucial carriers of ancient art,culture,and historical narratives,representing irreplaceable cultural reservoirs.Under suitable environmental conditions such as optimal temperature and humidity,fungi secrete enzymes to hydrolyze these nutrients,facilitating their growth and reproduction.Notably,Trichoderma longibrachiatum,a species within the genus Trichoderma,can thrive,posing a significant threat to paperbased cultural relics.Current methods for detecting mold on paper cultural relics predominantly employ offline and online detection techniques.However,these detection methods often necessitate the use of large analytical instruments,which can potentially damage the artifacts and are timeintensive.Additionally,some methods require direct contact with the artifacts,posing further risks of harm.In this study,we propose the development of a reflective concave stepped inclined lens fiber optic sensor designed specifically for detecting mold growth on the surface of paper cultural relics.This sensor aims to effectively identify and monitor the presence and proliferation of Trichoderma longibrachiatum on paper artifacts,offering promising applications in mold control for paperbased cultural heritage preservation.Methods The reflective concave stepped inclined lens fiber optic sensor design features a central incident fiber and an arrangement of 6 and 12 receiving fibers in the inner and outer layers,respectively.The end faces of these receiving fibers adopt both flat and inclined plane structures.Firstly,the detection principle of fiber optic sensors is established,and the influence of sensor structural parameters(such as incident fiber radius,receiving fiber radiu

关 键 词：光纤传感器 纸质文物 长梗木霉 无损检测 

分 类 号：O436[机械工程—光学工程]