摘要
为了实现光纤光栅动态解调的目的,采用了一种基于长周期光栅(LPFG)边缘滤波特性解调光纤布拉格光栅(FBG)的动态应变检测系统。将FBG作为传感元件,利用长周期光栅边缘滤波特性对光强调制,经光电转换获得电压信号,通过高速数据采集卡与LabVIEW软件设计结合由计算机采集。进行了振动实验,采集信号的时域波形图并进行频谱分析。试验结果表明该系统具有良好的动态响应特性,可实现2.5kHz以内的动态应变监测。
A dynamic-strain demodulating system based on a fiber Bragg grating filtering is proposed and experimentally demonstrated in this paper. The fiber Bragg gratings are constructed in the experimental laminate as sensing elements for signal vibration. The edge filtering of long-period fiber grating is used to demodulate FBG with intensity of light. By using the combination of data collect card and LabView software, the voltage signal is transmitted to computer. Through the experiment, this system has favorable dynamic response characteristic. It is used to monitor vibration sigal less than 2.5 KHz.
出处
《现代电子技术》
2012年第19期101-103,共3页
Modern Electronics Technique
基金
江苏省高校科研成果化推进项目(JH-009)
淮安市科技发展项目(HAG2011046)
关键词
虚拟仪器
光栅
边缘滤波
动态解调
virtual instrument
gratings
edge filtering
dynamic demodulating
