两种不同膜片的光纤光栅压力传感器的研究  

Study on fiber Bragg grating pressure sensors on two different diaphragms

作　　者：郭明金[1] 姜德生[1] 袁宏才[1] 干维国[1] 

机构地区：[1]武汉理工大学光纤传感技术研究中心,武汉430070

出　　处：《激光技术》2005年第6期611-614,共4页Laser Technology

基　　金：国家自然科学基金资助项目(50179029)

摘　　要：理论分析了光纤布喇格光栅的压力传感特性,并将光纤布喇格光栅分别纵向粘贴在不同型号的膜片上进行压力实验。实验结果表明,FBC20WB2型膜片的光纤布喇格光栅压力灵敏系数比ZXYC01型设计膜片大得多,其值分别为376pm/MPa和45pm/MPa左右,其测量精度分别为1%(fu ll scale)和0.5%(fu ll scale)。同时发现两种膜片中光纤布喇格光栅的中心波长与压力变化有着良好的线性关系和很高的相关系数,且迟滞现象较小,它们的相关系数均在0.9998以上。说明不同的膜片对压力灵敏系数有较大的影响。The pressure sensitive characteristic of fiber Bragg gratings is analyzed, the pressure experiments are carried out on different diaphragms. The experimental results indicate that the pressure sensitivity coefficient of fiber Bragg gratings in the FBC20WB2 type diaphragm is much bigger than that in the ZXYC01 type diaphragm. The values are about 376pm/MPa and 45pm/MPa,with measurement precision of 1% （full scale） and 0.5% （full scale） respectively. At the same time there is a very good hnearity and repetition between the center wavelength of fiber Bragg grating and pressure change in two diaphragms, and there is scarcely hysteresis effect, their pertinence coefficient is more than 0. 9998. The study indicates that the different diaphragm has a great impact on the pressure sensitivity coefficient.

关 键 词：光纤布喇格光栅 压力传感器 膜片 压力灵敏度系数 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]