光纤传感器应用于木质文物霉菌检测的研究  

Research on Application of Fiber Optic Sensor in Detection of Molds in Wooden Cultural Relics

作　　者：郭萌萌 陈焜 石胜辉[1] 覃丹 谭博文 罗彬彬[1] 蒋上海 赵明富[1] 唐欢[2] Guo Mengmeng;Chen Kun;Shi Shenghui;Qin Dan;Tan Bowen;Luo Binbin;Jiang Shanghai;Zhao Mingfu;Tang Huan(Chongqing Key Laboratory of Optic Fiber Sensor and Photoelectric Detection,Chongqing University of Technology,Chongqing 400054,China;Key Scientific Research Base of Pest and Mold Control of Heritage Collection State Administration of Cultural Heritage(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：《激光与光电子学进展》2024年第23期159-168,共10页Laser & Optoelectronics Progress

基　　金：重庆英才青年拔尖人才计划(cstc2021ycjh-bgzxm0128);重庆市教委科学技术研究重点项目(KJZD-K202201106);重庆市自然科学基金创新与发展联合基金(CSTB2023NSCQ-LZX0008);重庆理工大学科研创新团队培育计划(2023TDZ002);重庆理工大学研究生创新计划(gzlcx20233079);重庆中国三峡博物馆科研项目(3GM2022-KTZ07)。

摘　　要：为了实现木质文物表面霉菌生长过程的无损检测,提出了一种由1根发送光纤和6根倾斜面接收光纤构成的反射式光纤传感器。建立了光纤传感器检测理论模型,并对传感器结构参数对其灵敏度的影响进行了数值仿真,利用传感器对松木样品表面霉菌(桔青霉、长梗木霉)的生长过程进行了在线检测。研究结果表明,传感器能够准确获得松木表面培养的桔青霉和长梗木霉的识别特征峰,所在波长分别为261 nm和272 nm,霉菌生长高度与其吸光度具有良好的线性关系,对应的检测灵敏度分别是6.49×10^(-4)AU/μm和6.85×10^(-4)AU/μm(AU为吸光度单位)。此外,采用相对质量分数为8%的氯化钠溶液处理木质文物后,可以抑制其表面霉菌的生长。所提出传感器能够对木质样品表面生长的霉菌进行准确识别,在木质文物霉菌防治领域有一定的应用前景。A reflective fiber optic sensor that consists of one transmitting optical fiber and six receiving optical fibers with an inclined surface is developed to realize the online,nondestructive monitoring of the growth processes of molds on the surfaces of wooden cultural relics.A theoretical model of this sensor detection measurement is established,and the influences of the sensor structural parameters on its sensitivity are numerically simulated.The growth processes of Penicillium citrinum and Trichoderma longibrachiatum on the surfaces of wooden cultural relics are monitored online by the sensor.Results indicate that the sensor can accurately obtain the characteristic absorption peaks of Penicillium citrinum and Trichoderma longibrachiatum,which are 261 nm and 272 nm,respectively.The corresponding detection sensitivities are 6.49×10^(−4)AU/μm and 6.85×10^(−4)AU/μm(AU is a unit of absorbance),respectively.A good linear relationship is found between the sensor’s output signal and the mold height.In addition,the growth of molds on the surfaces of wooden cultural relics can be inhibited via treatment by a sodium chloride solution with an 8%relative mass fraction.The proposed sensor can accurately identify the mold growing on the surfaces of wooden samples,and it has application prospect in the field of mold control for wooden cultural relics.

关 键 词：反射式光纤传感器 木质文物 光纤光谱 霉菌 灵敏度 

分 类 号：O436[机械工程—光学工程]