介绍了啁啾光纤光栅的物理结构和传感原理,引入参考光栅,采用调制光强的方法实现了啁啾光纤光栅的传感信号解调,测试了它的应变和温度传感性能,测试数据显示其应变和温度传感曲线的线性度分别为0.9991和0.9989,表明啁啾光纤光栅具有较好的线性传感特性。为了解决长期检测时测量结果受光源衰减影响的问题,提出了一种新型的基于光强比值的解调处理算法并进行了实验验证,结果表明,该方法不仅极大地提高了啁啾光纤光栅用于长期检测的测量精度,还具有温度自补偿功能,提高了抗干扰能力,满足长期测试需求。
Describes the physical structure and the sensing principle of chirped fiber Bragg grating(CFBG),in-troducing a reference grating,the author realizes sensing signal demodulation of CFBG by using light intensity modulation.The strain and temperature sensing properties of CFBG were tested and the test data shows that the linear coefficient of the fitting curves of strain and temperature sensing properties were 0.9991 and 0.9989, which shows that CFBG has eminent strain and temperature sensing properties.In order to solve the problem that measurement accuracy of long-term monitoring was affected by light attenuation,the author proposes a new demodulation algorithm based on the intensity ratio and does some experimental validations for it.Test re-sults showed that the method can greatly improve the long-term detection accuracy of CFBG and also can realize the automatic temperature compensation.
参考文献
| [1] | 周智,田石柱,赵雪峰,武湛君,欧进萍.光纤布拉格光栅应变与温度传感特性及其实验分析[J].功能材料,2002(05):551-554. |
| [2] | 何政,卢富永,周智.分布式OFBG-GFRP传感筋在粘结性能试验中的应用[J].功能材料,2006(09):1455-1458. |
| [3] | Pan Jianjun .Research and application on track state mo-nitoring by optic fiber sensing technology[D].Wuhan:Wuhan University of Technology,2012. |
| [4] | 李进涛 .啁啾光栅压力传感器的研究[D].武汉理工大学,2007. |
| [5] | 郭丹 .啁啾光纤光栅动态称重技术研究[D].武汉理工大学,2008. |
| [6] | Sergio Barcelos;MichaelN;Zervas et al.Characteristics of chirped fiber gratings for dispersion compensation[J].Technical Digest,2012,20(04):161-163. |
| [7] | Robin Bader .Characterization of chirped fiber Bragg grat-ings-Identification and removal of cladding-mode pertur-bations in measurement data[J].Journal of Lightwave Technology,2011,29(12):1783-1789. |
| [8] | Li Lan;Dong Xinyong;Zhou Wenjun.Temperature independent accelerometer with a strain-chirped fiber Bragg grating[M].Shanghai:Communications and Pho-tonics,2009 |
| [9] | Pisco M.;Iadicicco A.;Campopiano S.;Cutolo A.;Cusano A. .Structured Chirped Fiber Bragg Gratings[J].Journal of Lightwave Technology: A Joint IEEE/OSA Publication,2008(12):1613-1625. |
| [10] | Kwon J;Jeong Y;Chung S.Tailored chirped fiber Bragg gratings using tapered elastic plates[A].Los Angeles,2012:672-673. |
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