基于可调谐F-P滤波器的光纤光栅传感解调系统寻峰算法对比分析  

Peak-detection Algorithm in Tunable F-P Filter Based Demodulation System for FBG Sensors

作　　者：蔡能宏[1] 闫连山[1] 陈娟子[1] 曾德兵[1] 

机构地区：[1]西南交通大学信息光子与通信研究中心,四川成都610031

出　　处：《仪表技术与传感器》2013年第4期100-102,106,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(60972003);四川省科技支撑计划重大项目(2011GZ0239);教育部新世纪(NECT-08-0821)

摘　　要：设计出一种基于可调谐F-P滤波器的光纤布拉格光栅(Fiber Bragg Grating,FBG)传感解调数据采集与处理系统。为了尽可能提高光纤光栅传感器的精度,分别采用质心法、三次样条插值法、最小二乘法、高斯多项式拟合法等对数据采集系统获取的原始信号数据进行光纤光栅波长寻峰算法研究,并分别将拟合结果与光谱仪测量波长数据进行比较。结果表明,高斯多项式拟合法精度和稳定性较好,且能满足实时性要求。A tunable F-P filter based demodulation system with data acquisition and processing for FBG（Fiber Bragg Grating） sensors was designed.Centroid method,cubic spline interpolation,least-squares method and Gaussian polynomial fitting were utilized as the wavelength peak-detection algorithm for multiple sensors.Processed data were compared with measurement results by the optical spectrum analyzer.It is illustrated that Gaussian polynomial fitting method exhibits better accuracy and stability,and can meet the real-time requirements.

关 键 词：布拉格光纤光栅 F-P滤波器 解调 寻峰算法 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]