基于双光纤光栅温度压力同时区分测量的研究  

Study on simultaneous discriminating measurement of temperature and pressure based on dual FBG

作　　者：乔学光[1,2] 陈懿[1] 贾振安[1] 

机构地区：[1]西安石油大学光电油气测井与检测教育部重点实验室,陕西西安710065 [2]西北大学,陕西西安710069

出　　处：《光电子．激光》2010年第1期12-14,共3页Journal of Optoelectronics·Laser

基　　金：国家"863"计划资助项目(2007AA06Z210;2007AA3Z413);国家自然科学基金资助项目(60654001;60727004);教育部科技创新工程重大资助项目(Z08119);中石油创新基金资助项目(2008D-5006-03-08)

摘　　要：提出了一种基于薄壁圆柱壳体的压力温度同时区分测量的光纤Bragg光栅(FBG)传感器结构。将双FBG沿着轴向分别粘贴在壁厚度不均匀的柱体外表面,由于两个FBG受到温度影响而引起的波长漂移量是相同的,这时两光栅Bragg波长漂移量之差就完全取决于压力,从而实现对压力温度的区分测量。实验测得,在0～7MPa内传感器的压力响应灵敏度为0.073nm/MPa,在22.6～112.6℃内的温度灵敏度为0.037nm/℃,分别是裸FBG的24倍和3.7倍。结果也表明,这种传感器具有良好的线性度与可重复性。Based on the thin-wall cylindrical shell,a new fiber Bragg grating（FBG） sensor to measure the temperature and the pressure simultaneously is proposed by using dual FBGs.Two gratings are stuck to the outer surface of the cylindrical shell with nonuniform thickness along the axial direction.The gratings have similar temperature responses but different strain responses,so the simultaneous measurement can be realized.The experimental results show that the pressure sensitivity coefficient and temperature sensitivity coefficient are 0.073 nm/MPa and 0.037 nm/℃ respectively,which are 24 and 3.7 times of that of bare FBG,within the range of 0-7 MPa and 22.6-112.6 ℃.The results also indicate that this sensor has a good linear response and repeatability.

关 键 词：光纤光学 传感器 光纤Bragg光栅(FBG) 区分测量 

分 类 号：TN253[电子电信—物理电子学]