一组波峰波谷实现光纤环镜传感器在线测量  

On-line measurement of a fiber loop mirror sensor using a set of adjacent wave-valley and wave-peak wavelengths

作　　者：江莺[1] 段峥 张晓丽[2] 胡兴柳 JIANG Ying;DUAN Zheng;ZHANG Xiaoli;HU Xingliu(College of Mechanical and Electronic Engineering,Nanjing Forestry University,Nanjing 210037,China;College of Physics and Electronic Engineering,Xinyang Normal University,Xinyang 464000,China;College of Intelligent Science and Control Engineering, Jinling Institute of Technology, Nanjing 211169,China)

机构地区：[1]南京林业大学机械电子工程学院,南京210037 [2]信阳师范学院物理电子工程学院,信阳464000 [3]金陵科技学院智能科学与控制工程学院,南京211169

出　　处：《激光技术》2020年第5期587-591,共5页Laser Technology

基　　金：国家自然科学基金资助项目(51505231,61603324);江苏省自然科学基金面上资助项目(BK20171114)。

摘　　要：为了实现传感光纤长度较短的双折射光纤环镜(Bi-FLM)传感器的在线测量,提出通过一组相邻的波峰波谷波长实现Bi-FLM应变传感器在线测量的方法。采用典型通讯波长1550nm附近的波峰波长、波谷波长及其双折射光纤初始条件,计算了应变大小。结果表明,该方法计算应变均与给定应变基本吻合,3组不同的组合方式计算的应变与给定应变的最大误差为0.0296%,最小误差为-0.0003%;该方法无需人为判断,有助于实现计算机在线测量;与监测点无关,无需校准;只需0.5个周期的干涉波形,需要的信息量少。这一结果对实现传感光纤长度较短的Bi-FLM传感器在线测量是有帮助的。In order to realize the on-line measurement of a birefringence fiber(BF)loop mirror(Bi-FLM)strain sensor with a short BF,the theoretical on-line measurements expression of a Bi-FLM strain sensor using a set of adjacent wave-valley and wave-peak wavelengths was deduced.The adjacent wave-valley and wave-peak wavelengths were near 1550nm and the BF initial conditions were used to calculate strain.The maximum error and minimum error of strain calculated by three different wavelengths combination were 0.0296%and-0.0003%,respectively.The result shows that the calculated strains are basically consistent with the given strains.The method doesn’t need human judgment.So it is helpful to realize on-line measurement by computer.The method is unrelated to the monitoring point.So the Bi-FLM sensor isn’t calibrated.In addition,the method requires less information and only needs 0.5 period of interference waveform.So it is helpful to realize the on-line measurement of a Bi-FLM sensor with a short BF.

关 键 词：传感器技术 在线测量 理论推导 双折射光纤环镜 应变传感器 波峰波长 波谷波长 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]