强度解调的光纤光栅振动检测硬件电路设计与实验研究

Hardware Circuit Design and Experimental Study of Fiber Bragg Grating Vibration Detection Using Intensity Demodulation Method

在对光纤光栅强度解调方法研究的基础上,利用Fast FET放大器AD8065设计了高速光电转换电路,并基于边缘滤波强度解调原理构建了光纤光栅振动检测系统。该系统具有成本低、解调速度快等特点。在实验中,引入使用美国国家仪器(NI)有限公司的电子电路仿真软件Multisim的仿真实验与构建的光纤光栅振动检测系统进行对比。实验结果表明,光纤光栅振动检测系统具有良好的幅频响应,频率响应范围可达5 Hz^1 000 Hz,为光纤光栅振动检测提供了一种新的可靠手段。

On the basis of the research on intensity demodulation method of Fiber Bragg Grating,High speed photo-electric conversion circuit was designed with Fast FET amplifier AD8065 and a Fiber Bragg Grating vibration detec-tion system based on edge filter demodulation is established. The system has advantages of low cost,fast responseand so on. In the experiments,simulation experiments results from National Instruments（NI）Ltd Electronic Multi-sim circuit simulation software are used to compare with the results of the fiber grating vibration demodulation sys-tem. The results show that The Fiber Bragg Grating vibration detection system has good amplitude frequency re-sponse,and its frequency response range is 5 Hz^1 000 Hz,which provides a new reliable method for Fiber BraggGrating vibration detection.