基于双光纤光栅的流速传感器设计  

Design of flow-velocity sensor based on double fiber Bragg gratings

作　　者：马龙 张发祥 刘小会 王英英 王昌 李惠 MA Long;ZHANG Fa-xiang;LIU Xiao-hui;WANG Ying-ying;WANG Chang;LI Hui(Shandong FYBSENSE Photoelectric Technology Co.,Ltd,Jinan 250098,China;Laser Institute,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China)

机构地区：[1]山东飞博赛斯光电科技有限公司,山东济南250098 [2]齐鲁工业大学(山东省科学院)山东省科学院激光研究所,山东济南250014

出　　处：《山东科学》2022年第6期109-115,共7页Shandong Science

基　　金：齐鲁工业大学科教产融合创新工程国际合作项目(2020KJC-GH16);齐鲁工业大学科教产融合试点工程培新项目(2022PX050)。

摘　　要：针对智慧海洋领域对海洋流速监测的要求,基于双光纤光栅能消除温度对流速的交叉灵敏度特性及悬臂梁的杠杆放大结构,设计了一种用于测量流体流速的双光纤光栅流速传感器。该传感器主要由外壳、光纤光栅测试组件及固定件组成,采用无胶化密封封装,进行了灵敏度及动态范围的测试,此外还分析了不同温度和压力对传感器性能的影响。通过高精度解调仪解调,设计的光纤流速传感器的灵敏度为76 mm/s,流速测量范围为0~1.2 m/s,且该流速传感器对温度和外界压力都不敏感,能够实现对流速单一参量的监测,可以满足油气田开采、油气输送管道、海洋河流等环境下流体测试的需求。A double fiber Bragg grating(FBG) flow-velocity sensor is designed for measuring the flow velocity. The sensor mainly comprises shell, FBG measuring module, and fixture. The sensitivity and dynamic range are tested, and the influence of different temperature and pressure on the performance of the sensor is analyzed. The sensitivity of the fiber-optic flow sensor is 76 mm/s, and the flow velocity is measured in the range of 0 to 1.2 m/s. The sensor is insensitive to temperature and ambient pressure and can meet the needs of flow-velocity measurement in the fields of the exploitation and transportation of oil and gas as well as the oceans and rivers.

关 键 词：流速 光纤流速传感器 双光纤光栅 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]