两路微振动反馈光纤F-P腔干涉信号重构  

Reconstruction of Interference Signals from Two Channels of Micro-Vibration Feedback Optical Fiber F-P Cavity

作　　者：赵忖[1] 刘径舟 ZHAO Cun;LIU Jing-zhou(Northeast Petroleum University Qinhuangdao,Qinhuangdao 066004,China;Daqing Oil Field Co,Daqing 163000,China)

机构地区：[1]东北石油大学秦皇岛校区,河北秦皇岛066004 [2]大庆油田有限责任公司,黑龙江大庆163000

出　　处：《数学的实践与认识》2021年第16期146-152,共7页Mathematics in Practice and Theory

基　　金：黑龙江省省属本科高校引导性创新基金项目(2019QNQ-01)。

摘　　要：对两路不同幅度和频率的正弦信号,建立了双外腔反馈光纤F-P腔干涉测量微振动的系统.分析了三镜腔干涉理论,确定了待测目标位移与光波相位关系,基于EMD分解和多次希尔伯特变换解包裹相位算法,对干涉信号进行了分离和重构.提出了一种新的跳变点检测方法,并利用三次样条插值重构了弱反馈时的两路微振动信号.实验和仿真结果表明,该方法重构误差小.A optical fiber F-P interferometer was built for measuring two sinusoidal micro vibration signals that have different amplitudes and frequencies.The interference theory of three mirror cavity was analyzed,and the relationship between the phase of the light wave and the displacement to be measured was established.The interference signals were separated and reconstructed based on EMD decomposition and multiple Hilbert transform unwrapping phase algorithm.A new method of detecting the jumping point was proposed.Two micro-vibration signals with weak feedback were reconstructed using cubic spline interpolation.Experimental and simulation results show that this method has less reconstruction error.

关 键 词：光纤F-P腔干涉 微振动 信号重构 解包裹相位 跳变点检测 

分 类 号：TN253[电子电信—物理电子学] TP212[自动化与计算机技术—检测技术与自动化装置]