摘要
提出一种基于膜片的双光纤Bragg光栅实现温度与压强同时区分测量的光纤光栅传感器.分别将光纤Bragg光栅沿膜片的径向和环向粘贴在膜片上,当温度发生变化或者膜片受到压力作用时,都会引起光纤Bragg光栅峰值波长偏移.由于温度的变化所引起的两栅波长偏移量是相等的,此时两光纤Bragg光栅波长偏移量之差完全取决于膜片所受的压强,据此可以实现温度与压强的同时区分测量.该传感器线性度很好,可以用来同时区分测量温度在40～110℃,压强在0～6MPa环境中的温度和压强,其温度测量误差不大于1℃,压强测量误差不大于0 2MPa.
A novel plate diaphragm based FBG sensor is proposed to measure temperature and pressure simultaneously. Two FBGs are attached radially and circumferentially to a metal diaphragm respectively, and when temperature and pressure change, the peak wavelength of the FBGs will shift. The peak wavelength shifts of the two FBGs induced by temperature are approximately the same when the different pressures are exerted on the sensor. The peak wavelength difference depends only on the exerted pressure. So the simultaneous measurement of the temperature and pressure can be carried out. The linearity of the sensor is good. The measurement ranges of temperature and pressure are 40℃～110℃ and 0～(6MPa), and the temperature and pressure measurement errors are less than 1℃ and (0.2MPa) respectively.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2005年第1期151-155,共5页
Journal of Xidian University
基金
国家"863"计划资助项目(2002AA313150)
国家自然科学基金资助项目(69877025)
国家教育部科技重点项目(02190)
陕西省自然科学基金资助项目(2000C34)
陕西省教育厅科技项目(02JK158)
西安市科技攻关项目(GG200126)
关键词
导波与光纤光学
光纤传感
光纤Bragg光栅传感
传感器灵敏度
guided wave and fiber optics
optical fiber sensing
in-fiber Bragg grating sensing
sensitivity of the sensor
