Wavelength Shift Detection Methods Based on Cross-Correlation Analysis for Signal Demodulation of Fiber Bragg Grating Sensing System
Wavelength Shift Detection Methods Based on Cross-Correlation Analysis for Signal Demodulation of Fiber Bragg Grating Sensing System
复制标题
基于互相关分析的光纤布拉格光栅传感系统信号解调波长漂移检测方法
DOI：
10.4028/www.scientific.net/amm.239-240.156
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
B. Wei
中科院分区：
文献类型：
--
作者：
Fan Yang;B. Wei
为了提高光纤布拉格光栅（FBG）传感系统的信号解调性能，提出了一种基于互相关分析的波长移检测方法，以提高测量精度。仿真结果表明，在14 dB ~ 7 dB的信噪比范围内，测量的绝对误差在2 ~ 3 pm之间。在高信噪比条件下，绝对误差可近似减小至0.5 pm。因此，该解调算法可以有效地降低噪声的影响，有助于进一步研究光纤光栅传感器解调系统的特性。
In order to improve the signal demodulation performance of fiber Bragg grating (FBG) sensing system, a wavelength shift detection method based on cross-correlation analysis is proposed to improve the accuracy of the measurement. The simulation results indicate that the absolute error of the measurement can be between 2 pm - 3 pm within the range of SNR of 14 dB-7 dB. Under the condition with high SNR, the absolute error can be approximately reduced to 0.5 pm. Hence, this demodulation algorithm can reduce the influences of the noises effectively and help to further study the features of the FBG sensor demodulation system.