基于非本征Fabry-Perot腔光纤液位传感器研究  

Study on the Optical Fiber Liquid-Level Sensor Based on Extrinsic Fabry-Perot Cavity

作　　者：吕涛[1] 刘德森[2] 刘志麟 何开华[1] 程永进[1] 

机构地区：[1]中国地质大学数理学院,武汉430074 [2]西南大学光电技术研究所,重庆400715 [3]广州敏通光电科技有限公司,广州510150

出　　处：《光子学报》2007年第4期690-693,共4页Acta Photonica Sinica

基　　金：中国地质大学(武汉)优秀青年教师计划(CUGQNL0614)资助

摘　　要：介绍了适用于液位测量的强度型非本征法布里-珀罗(F-P)腔光纤液位传感器的结构设计及其性能.实验观察到F-P腔具有良好的多周期输出特性和局部的线性特性,选用局部的1/4周期输出线性段作为线性工作区间可对液位进行高准确度、连续性测量.恰当选择敏感组件的尺寸可设计不同量程的传感器.实验结果表明,传感器测量3.5 m水位时,精确度为±2mm,最小分辨率为1mm.The structure and performance of the intensity-based optical fiber liquid-level sensor employing extrinsic Fabry-Perot cavity was introduced. The outputs of the Fabry-Perot cavity are characteristic of good several periods and local linearity. Quarter period output curve can be selected as linear region to measure liquid-levels accurately and continuously. The dimension of the sensitive modular was properly selected to design sensors with different ranges. The experimental results imply that accuracy of ± 2 mm and minimal resolving power of 1 mm are obtained when 3.5 m water-level is measured.

关 键 词：光纤传感器 法布里-珀罗腔 液位 弹性硅片 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]