一种基于F-P干涉仪的FBG解调系统信号重建算法  

Signal Reconstruction Algorithm of FBG Demodulation Based on F-P Interferometer

作　　者：于效宇[1] 赵洪[2] 刘艳[1] 岳振[2] 

机构地区：[1]哈尔滨理工大学测控技术与通信工程学院 [2]哈尔滨理工大学电气与电子工程学院,哈尔滨150040

出　　处：《半导体光电》2009年第1期131-133,141,共4页Semiconductor Optoelectronics

摘　　要：建立了基于可调谐法布里-珀罗(F-P)干涉仪的光纤光栅传感器解调系统,分析了解调系统输出信号噪声的主要来源和特点,设计了旁瓣抑制强的数字低通滤波器滤除噪声干扰,并根据最小二乘法原理对滤波后的电压信号波峰进行了高斯曲线拟合。通过实验得知,该算法能够有效地重建系统输出信号,提高解调系统的测量精度。A Fiber Bragg Grating （FBG） sensor demodulation system was built based on the tunable F-P interferometer. The major resources and characteristics of its output signal noise were analyzed. Then a high sidelobe suppression digital filter was designed to filter the noise. According to the least square method theory, Gauss curve fitting was done to the filtered voltage signal peak. Experiment results show the algorithm can rebuild the output signal effectively and enhance the measurement accuracy of the demodulation system.

关 键 词：数字滤波 F-P干涉仪 光纤光栅 解调系统 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]