碳涂覆光纤用于分布式裂缝检测的实验研究  

The Distributed Crack Monitoring Using Carbon Coated Optical Fiber

作　　者：张少杰[1] 陈江[2] 闵兴鑫[1] 叶丰[1] 刘浩吾[1] 

机构地区：[1]四川大学水利水电学院,四川成都610065 [2]中国水电顾问集团昆明勘测设计研究院,云南昆明650051

出　　处：《四川大学学报（工程科学版）》2010年第4期230-233,共4页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然基金委;二滩水电开发有限公司"国家自然科学基金雅砻江水电开发联合研究基金"资助项目(50579094)

摘　　要：采用混凝土模型实验研究一种新型光纤—碳涂覆光纤的传感特性,测定了分布式光纤传感用于混凝土结构裂缝监测中的力-光本构关系和性能参数。表明碳涂覆光纤具有高分辨率(0.02mm),动态范围(1～4.5mm)明显优于普通单模光纤,从而弥补普通光纤应用于光纤裂缝传感时的某些缺陷,对在条件恶劣的情况下采用碳涂覆光纤进行工程健康监测提供了依据。A new type of SM carbon coated optical fiber was tested using the concrete models of optical fiber crack sensing to get its mechanic-optic constitutive relation and performance characteristics of concrete structural crack monitoring. The results indicated that the carbon coated optical fiber is able to monitor the development of the crack with high sensitivityof 0. 02 mm and its dynamic range of 1 ～ 4. 5 mm is larger significantly than the common SM optical fiber. Thereby it could offset the disadvantages of common SM optic-fibers for crack monitoring and be used in severe conditions.

关 键 词：分布式光纤裂缝传感监测 碳光纤 光纤传感模型试验 传感灵敏度 动态范围 

分 类 号：TV53[水利工程—水利水电工程]