带宽调制型单光纤光栅温变无补偿位移传感

郭团; 赵启大; 刘丽辉; 黄桂岭; 薛力芳; 刘波; 张伟刚; 开桂云; 董孝义

光学学报, 2007, 27 (1): 15, 网络出版: 2007-01-22

带宽调制型单光纤光栅温变无补偿位移传感

Research on Bandwidth-Modulated and Temperature-Independent Single Fiber Bragg Grating Displacement Sensing

论文大纲

郭团 ^*赵启大刘丽辉黄桂岭薛力芳刘波张伟刚开桂云董孝义

作者单位

南开大学现代光学研究所, 天津 300071

光纤光学光纤光栅位移传感光纤传感带宽调制 fiber optics fiber Bragg grating displacement sensing fiber sensing bandwidth modulation

摘要

报道了利用反射谱带宽调制和光强差分探测技术实现单一光纤光栅温变无补偿位移精确测量的新方法。设计了一种结构新颖的曲臂梁位移传感装置, 结合光波导理论与材料力学原理分析了光纤光栅在高斯应变作用下光栅反射谱侧向梯度展宽的成因, 理论推导了特殊结构梁在外力作用下光栅反射谱带宽/反射光强与压力之间的响应关系。光栅反射谱侧向梯度展宽的同时反射光强线性增加, 利用光强差分检测方法消除光源出光抖动的影响, 提高了位移测量精度。基于带宽调制的光纤光栅位移传感方法免受温度变化的影响, 在-10 ℃～80 ℃的温度变化范围内, 测量误差小于1.2％, 实现了单光纤光栅温变无补偿位移测量。

Abstract

The temperature-independent fiber Bragg grating (FBG) displacement measurement based on optical reflection spectrum bandwidth modulation and differential optical power detection is proposed and experimentally demonstrated. A specially designed bending cantilever beam is used to induce Gauss strain distribution along the sensing FBG, resulting in Bragg wavelength shift and bandwidth modulation. Based on the theory of optical waveguide and material mechanics, the causation of reflection spectrum lateral gradient broadening of fiber Bragg grating under the Gauss strain distribution is analyzed, and the force-to-bandwidth broadening relation and force-to-optical power relation are formulized based on cantilever beam special structure with a lateral gradient broadening of FBG spectrum bandwidth and a linear increase of reflection optical power. For a temperature range of -10 ℃～80 ℃, the measured displacement fluctuates less than 1.2% without any temperature compensation.

参考文献

[1] . Hill, Gerald Meltz. Fiber Bragg grating technology fundamentals and overview[J]. J. Lightwave Technol., 1997, 15(8): 1263-1276.

[2] . Kersey, Michael A. Davis, Heather J. Patrick et al.. Fiber grating sensors[J]. J. Lightwave Technol., 1997, 15(8): 1442-1463.

[3] . LeBlanc, S. Y. Huang, M. M. Ohn et al.. Distributed strain measurement based on a fiber Bragg grating and its reflection spectrum analysis[J]. Opt. Lett., 1996, 21(17): 1405-1407.

[4] . . Fiber Bragg grating sensor for simultaneous measurement of displacement and temperature[J]. Opt. Lett., 2000, 25(16): 1141-1143.

[5] . Huang, M. M. Ohn, M. LeBlanc et al.. Continuous arbitrary strain profile measurements with fiber Bragg gratings[J]. Smart Mater. Struct., 1998, 7(2): 248-256.

[6] . Huang, M. LeBlanc, M. M. Ohn et al.. Bragg intragrating structural sensing[J]. Appl. Opt., 1995, 34(22): 5003-5009.

[7] . . Temperature insensitive measurements of static displacements using a fiber Bragg grating[J]. Opt. Express, 2003, 11(16): 1918-1924.

[8] . . FBG-type sensor for simultaneous measurement of force (or displacement) and temperature based on bilateral cantilever beam[J]. IEEE Photon. Technol. Lett., 2001, 13(12): 1340-1342.

[9] . . Temperature-insensitive fiber Bragg grating liquid-level sensor based on bending cantilever beam[J]. IEEE Photon. Technol. Lett., 2005, 17(11): 2400-2402.

[10] Guan Baiou, H. Y. Tam, S. L. Ho et al.. Study on strain/ temperature two parameters sensing with a single fiber Bragg grating[J]. Chin. J. Lasers, 2001, 28(4): 372～374 (in Chinese)
关柏鸥, H. Y. Tam, S. L. Ho 等. 单光纤光栅温度应变双参量传感研究[J]. 中国激光, 2001, 28(4): 372～374

[11] Dong Xinyong, Guan Baiou, Zhang Ying et al.. Simultaneous displacement and temperature measurement using one fiber Bragg grating[J]. Chin. J. Lasers, 2001, 28(7): 621～624 (in Chinese)
董新永,关柏鸥,张颖等. 单个光纤光栅实现对位移和温度的同时测量[J]. 中国激光, 2001, 28(7): 621～624

[12] Guo Tuan, Qiao Xueguang, Jia Zhenan et al.. Simultaneous measurement of temperature and pressure using a single fiber Bragg grating based on reflected wave’s broadened bandwidth[J]. Acta Optica Sinica, 2004, 24(10): 1401～1405 (in Chinese)
郭团,乔学光,贾振安等. 单光纤光栅波谱展宽温度压力同时区分测量[J]. 光学学报, 2004, 24(10): 1401～1405

[13] Wang Hongliang, Qiao Xueguang, Zhou Hong et al.. Development of optimizing system of two paramenters for sensing pressure and temperature with dual-fiber Bragg grating sensor[J]. Acta Optica Sinica, 2005, 25(7): 875～880 (in Chinese)
王宏亮,乔学光,周红等. 压力与温度双参量传感优化系统的研制[J]. 光学学报, 2005, 25(7): 875～880

[14] Tu Qinchang, Zhang Weigang, Chen Jianjun et al.. A novel high sensitivity chirp tuning device of fiber grating[J]. Acta Optica Sinica, 2005, 25(9): 1153～1156 (in Chinese)
涂勤昌,张伟刚,陈建军等. 一种新颖的高灵敏度光纤光栅带宽调谐机构[J]. 光学学报, 2005, 25(9): 1153～1156

[15] J. Hannah, M .J. Hillier. Applied Mechanics[M]. 3rd ed. London: Pearson Education Limited, 1995. 310～312

郭团, 赵启大, 刘丽辉, 黄桂岭, 薛力芳, 刘波, 张伟刚, 开桂云, 董孝义. 带宽调制型单光纤光栅温变无补偿位移传感[J]. 光学学报, 2007, 27(1): 15. 郭团, 赵启大, 刘丽辉, 黄桂岭, 薛力芳, 刘波, 张伟刚, 开桂云, 董孝义. Research on Bandwidth-Modulated and Temperature-Independent Single Fiber Bragg Grating Displacement Sensing[J]. Acta Optica Sinica, 2007, 27(1): 15.

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