Simultaneous measurement of temperature and concentration of sugar solution based on hybrid fiber grating sensor
-
摘要:为了实现蔗糖溶液浓度与温度的同步精确测量,采用组合式光纤光栅,通过线性折射率分区,构成相应的系数矩阵。首先,基于模式耦合理论,采用光纤布拉格光栅(FBG)和长周期光纤光栅(LPBG)形成组合式光纤光栅,实现了双参数测量的光学传感器。此组合式光纤光栅结构中,FBG响应温度测量,LPFG同时响应蔗糖溶液浓度和温度测量。然后,在两个线性折射率范围,即1.33~1.42和1.42~1.44中,校正温度和蔗糖溶液浓度的相关系数。最后,构成两个敏感系数矩阵,来讨论蔗糖溶液浓度和温度同时测量的方法。实验结果表明:蔗糖溶液浓度测量灵敏度达到-213.5 pm/RIU,温度测量灵敏度达到117.9 pm/K。因此,组合式光纤光栅传感器作为光化学传感器具有高灵敏度的特性。Abstract:In order to accurately measure temperature and concentration of sugar solution at the same time, we presented a hybrid fiber grating sensor. Firstly, based on mode coupling theory, hybrid fiber gratings were formed using fiber Bragg grating and long-period fiber grating, which could realize dual-parameters measurement. In this hybrid fiber grating, FBG response to temperature measurement, while LPFG response to simulataneous measurement of sugar solution concentration and temperature. Then, in two linear refractive index ranges, that is, from 1.33 to 1.42 and from 1.42 to 1.44, we calibrated correlation coefficient of temperature and sugar concentration. Finally, two sensitivity coefficient matrixes were constituted to discuss the method of measuring temperature and sugar solution concentration simultaneously. Experimental results indicate that the measuring sensitivity of temperature reaches 117.9 pm/K, and sugar solution concentration reaches 213.5 pm/RIU. Therefore, the modular fiber grating sensor has high sensitivity property as the photochemical sensor.
-
[1] ERDOGAN T. Fiber grating spectra[J].Lightwave Technol.,1997,15(8):1277-1294. [2] GEORGES H,ABDELRAFIK M. Characterizations at very high temperature of electric arc-induced long-period fiber gratings[J].Optics Communications,2002,208:329-335. [3] 赵明富,韩汐,王博思,等. 长周期光纤光栅的折射率梯度相应特性[J]. 光学 精密工程,2013,21(2):316-322. ZHAO M F,HAN X,WANG B S,et al.. Response characteristics of refractive-index gradient based on long-period fiber gratings[J].Opt. Precision Eng.,2013,21(2):316-322.(in Chinese) [4] 罗彬彬,赵明富,周晓军,等. 基于结构化光纤Bragg光栅的折射率梯度传感器研究[J]. 光学学报,2012,32(3):34-41. LUO B B,ZHAO M F,ZHOU X J,et al.. Research on the refractive-index gradient sensor based on the structured fiber Bragg grating[J].Acta Optica Sinica,2012,32(3):34-41.(in Chinese) [5] 徐国权,熊代余. 光纤光栅传感技术在工程中的应用[J]. 中国光学,2013,6(3):306-317. XU G Q,XIONG D Y. Applications of fiber Bragg grating sensing technology in engineering[J].Chinese Opt.,2013,6(3):306-317.(in Chinese) [6] 李薇,侯睿,杨文俊. 基于温度减敏的光纤Bragg光栅应变传感器[J]. 仪器技术与传感器,2013(5):1-3. LI W,HOU R,YANG W J,et al.. Temperature insensitive fiber grating sensor for strain detection[J].Instrument Technique and Sensor,2013(5):1-3.(in Chinese) [7] 陶蒙蒙,杨鹏翎,刘卫平,等. 高能 辐照下光纤布拉格光栅响应特性[J]. 中国光学,2012,5(5):544-549. TAO M M,YANG P L,LIU W P,et al.. High temperature-pressure FBG sensor applied to special environments[J].Chinese Opt..,2011,19(3):545-552.(in Chinese) [8] 祝睿雪,景锐平,王雪成,等. 悬梁臂结构光纤光栅温度自补偿位移传感器实验研究[J]. 电子技术,2013(5):70-72. ZHU R X,JING R P,WANG X CH,et al.. Experimental study on cantilever beam structural FBG displacement sensor with temperature self-compensation[J].Electronic Technology,2013(5):70-72.(in Chinese) [9] JOSé R. DA CUNHA A,PETRUS A J R. New approach to the strain analysis of bragg grating sensors[J].Photonic Sensors,2013,18(1):74-80. [10] 蔡安,印新达,常晓东,等. 具有温度补偿的膜片性光纤光栅温度压力传感器[J]. 传感器与微系统,2013,32(4): 98-100. CAI A,YIN X D,CHANG X D,et al.. Optical fiber grating temperature and pressure sensor based on diaphragm with temperature compensation[J].Transducer and Microsystem Technology,2013,32(4):98-100.(in Chinese) [11] PATRICK H J,WILLIAMS G M,KERSEY A D,et al.. Hybrid fiber Bragg grating/long period fiber grating sensor for strain/temperature discrimination[J].IEEE Photonics Technology Lett.,1996,8(9):1223-1225. [12] ZHANG L,ZHANG W,BENNION I.Fiber Optic Sensors[M]. Florida:CRC Press,2002. [13] BHATIA V,VENGSARKAR A M. Optical fiber long-period grating sensors[J].Opt. Lett.,1996(21):692-694. [14] 饶云江,王义平,朱涛.光纤光栅原理及应用[M]. 北京:科学出版社,2006. RAO Y J,WANG Y P,ZHU T.Principles and Applications of Fiber Grating[M]. Beijing:Science Press,2006.(in Chinese) [15] LITE D R.CRC Handbook of Chemistry and Physics[M]. Florida:CRC Press,1999.
点击查看大图
计量
- 文章访问数:1179
- HTML全文浏览量:247
- PDF下载量:511
- 被引次数:0