Study of a novel demodulation method for FBG sensor

被引:0
作者
Wang, Lu [1 ]
Peng, Bao-jin [1 ]
Xu, Fei [1 ]
Wu, Dan [1 ]
Wu, Hao-wei [1 ]
机构
[1] Zhejiang Normal Univ, Inst Informat Opt, Jinhua, Zhejiang, Peoples R China
来源
GREEN POWER, MATERIALS AND MANUFACTURING TECHNOLOGY AND APPLICATIONS II | 2012年 / 214卷
关键词
Fiber Bragg Grating (FBG); Matching Grating Demodulation; Demodulation; Cascade; Temperature/Strain Cross-Sensitivity;
D O I
10.4028/www.scientific.net/AMM.214.898
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
A novel demodulation method for Fiber Bragg Grating (FBG) sensor based on matching grating demodulation is proposed. It is means using several fiber gratings to cascade, and programming to make the computer automatically select different wavelengths. So that it can expand demodulation range based on high sensitivity. The photoelectric detector (PD) makes the reflected light intensity which form FBG change into voltage. And the voltage is amplified to 0 similar to 5v by amplifying circuit. Then through the data collection box, voltage sent to computer for data acquiring. Real-time analysis data and display the variable of center wavelength for sensing FBG. Because the same type of sensing FBG and demodulation FBG, they have the same temperature drift, so it can control the influence of environmental temperature. Therefore, this system can successfully solve the temperature/strain cross-sensitivity issue. The experimental results show that it is feasible to demodulate wavelength using the cascaded FBG. And the experimental measuring wavelength error is less than 0.009 nm, the measuring micro-strain error is less than 7.5 mu epsilon.
引用
收藏
页码:898 / 902
页数:5
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