基于光纤弯曲损耗的混凝土裂缝位移传感器设计  

Design of concrete crack displacement sensor based on optical fiber bending loss

作　　者：王洋[1] 高瑞 刘炜[1] WANG Yang;GAO Rui;LIU Wei(Department of Information Management,Northwest A&F University,Yangling 712100,China;College of Information Engineering,Northwest A&F University,Yangling 712100,China)

机构地区：[1]西北农林科技大学信息化管理处,陕西杨凌712100 [2]西北农林科技大学信息工程学院,陕西杨凌712100

出　　处：《传感器与微系统》2023年第3期87-90,共4页Transducer and Microsystem Technologies

基　　金：赛尔网络下一代互联网技术创新项目(NGII20190624)。

摘　　要：裂缝降低混凝土结构的安全性和稳定性,初始裂缝肉眼不易发觉,若不及时采取修复措施,裂缝会越发严重,影响结构安全以及人身安全。针对混凝土结构微裂缝,应用光纤弯曲损耗原理研究了光纤缠绕半径对光纤传输的影响,建立了光纤损耗与裂缝宽度的数值模型。研究结果表明:光纤缠绕半径为5~10 mm时,光纤灵敏度高、变化明显。裂缝位移传感器测量范围为0.1~2 mm,可用于混凝土结构微小裂缝的监测。Cracks reduce the safety and stability of concrete structures, and the initial cracks are not easy to detect by naked eyes.If repair measures are not taken in time, the cracks will become more and more serious, affecting structural safety and personal safety.Aiming at the micro cracks in concrete structure, the influence of fiber winding radius on fiber transmission is studied by using the principle of fiber bending loss, and the numerical model of fiber loss and crack width is established.Research results show that when the winding radius of optical fiber is 5~10 mm, the sensitivity of optical fiber is high and the change is obvious.The measuring range of crack displacement sensor is 0.1~2 mm, which can be used to monitor micro cracks in concrete structures.

关 键 词：光纤损耗 弯曲长度 混凝土结构 位移传感器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TN929.1[自动化与计算机技术—控制科学与工程]