一种新型大量程裂缝光纤传感器  

A novel cracking sensing fiber sensor with wide range

作　　者：包腾飞[1,2] 赵津磊[1,2] 阎培林 张万祝 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,南京210098 [2]河海大学水利水电学院,南京210098 [3]中国水电顾问集团北京勘测设计研究院有限公司,北京100024

出　　处：《中国科学：技术科学》2015年第9期984-990,共7页Scientia Sinica(Technologica)

基　　金：国家自然科学基金(批准号:51379068;51139001);江苏省杰出青年科学基金(批准号:BK20140039);高等学校博士学科点专项科研基金(批准号:20120094110005)资助项目

摘　　要：裂缝一直以来是判断混凝土结构健康程度的重要标志,然而对于一些混凝土结构一定开度的裂缝对结构本身安全情况影响不大,但当裂缝继续开展到一定的程度时就要采取必要的措施进行维护.本文基于光纤宏弯曲损耗理论提出了一种大量程裂缝传感器,并介绍了裂缝感知原理,然后通过有机玻璃板模拟裂缝开展,验证了此传感器的可行性.最后,通过将此传感器埋入混凝土梁,对此传感器的实际应用能力进行了进一步的验证.实验表明,该传感器可对混凝土结构上大裂缝的开展情况进行持续性的监测.The health of concrete structures is usually reflected by cracking. For some structures, small cracks may have little influence on the safety of the structures.But maintenance measures have to be taken if the cracks continue to develop. A sensing fiber sensor with wide range was developed in this paper based on the theory of macro bending loss of fiber. The sensing concept was introduced and the feasibility of this sensor was studied by a cracking simulator. Finally, the sensor was embedded in a concrete beam and the actual application ability of it was studied. The experimental results showed that the sensor has a real-time monitoring capability in cracks monitoring.

关 键 词：光纤 传感器 裂缝监测 混凝土结构 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]