On a fiber grating sensor system with the capacity of cross-sensitivity discrimination |
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| Authors: | Jincheng Pei Xichun Yang Yage Zhan Rude Zhu Shiqing Xiang |
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| Institution: | aLaboratory of Information Optics, Shanghai Institute of Optics and Fine Mechanics, The Chinese Academy of Sciences, Shanghai 201800, China;bGraduate School of The Chinese Academy of Sciences, Beijing 100039, China;cCollege of Science, Donghua University, Shanghai 201602, China |
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| Abstract: | A novel fiber Bragg grating (FBG) sensor system based on an interrogating technique by two parallel matched gratings was designed and theoretically discussed. With an interrogation grating playing the role of temperature compensation grating simultaneously, the wavelength drifts induced by temperature and strain were discriminated. Additionally, the expressions of temperature and strain were deduced for our solution, and dual-value problem and cross sensitivity were solved synchronously through data processing. The influence of the FBG's parameters on the dynamic range and precision was discussed. Besides, the change of environment temperature cannot influence the dynamic range of the sensor system through temperature tuning. The system proposed in this paper will be of great significance to accelerate the real engineering applications of FBG sensing techniques. |
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| Keywords: | Fiber Bragg grating sensor Interrogation techniques Cross sensitivity Dynamic range Dual value |
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