基于FPGA的光纤光栅温度传感器高速解调系统

王伟; 张天阳; 陈海滨; 郭子龙

doi:doi:10.7510/jgjs.issn.1001-3806.2018.06.023

激光技术, 2018, 42 (6): 849, 网络出版: 2018-12-25

基于FPGA的光纤光栅温度传感器高速解调系统

High-speed demodulation system of fiber Bragg grating temperature sensor based on FPGA

论文大纲

王伟 ^*张天阳陈海滨郭子龙

作者单位

西安工业大学光电工程学院, 西安 710021

光纤光学高速解调高斯拟合 FBG温度传感器 fiber optics high-speed demodulation Gaussian fitting fiber Bragg grating temperature sensor

摘要

为了实现对光纤光栅温度传感器的高速解调, 采用了一种基于现场可编程门阵列和小型光谱仪模块的光纤光栅温度传感器高速解调系统, 利用放大自发辐射光源产生的近红外宽带光辐射, 照射光纤光栅温度传感器, 对其反射光通过高斯拟合寻峰算法确定中心波长, 并由中心波长偏移量判定环境温度的解调方法, 进行了理论分析和实验验证。结果表明, 在30℃～60℃温度范围内, 完成了解调速率达20kHz、温度灵敏度为12.49pm/℃的高速温度测量, 实现了对光纤光栅温度传感器的高速解调。

Abstract

In order to realize high-speed demodulation of fiber Bragg grating(FBG) temperature sensors, a high-speed demodulation system of FBG temperature sensor based on field-programmable gate array and small spectrometer module was adopted. Near infrared broadband light radiation from an amplified spontaneous emission light source was used to irradiate the FBG temperature sensor. Center wavelength of the reflective light was determined by Gaussian fitting peak-seeking algorithm. Demodulation method of ambient temperature was determined by center wavelength offset. After theoretical analysis and experimental verification, the results show that high-speed temperature measurement with demodulation velocity of 20kHz and temperature sensitivity of 12.49pm/℃ is completed within the range of 30℃～60℃. High-speed demodulation of FBG temperature sensors is realized.

参考文献

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王伟, 张天阳, 陈海滨, 郭子龙. 基于FPGA的光纤光栅温度传感器高速解调系统[J]. 激光技术, 2018, 42(6): 849. WANG Wei, ZHANG Tianyang, CHEN Haibin, GUO Zilong. High-speed demodulation system of fiber Bragg grating temperature sensor based on FPGA[J]. Laser Technology, 2018, 42(6): 849.

基于FPGA的光纤光栅温度传感器高速解调系统

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