基于法布里-珀罗干涉的全光纤振动检测仪  

All-Fiber Vibration Detector Based on Fabry-Perot Interference

作　　者：段志伟[1] 苏皓 刘冬冬[1] 丛至诚 徐开传 DUAN Zhiwei;SU Hao;LIU Dongdong;CONG Zhicheng;XU Kaichuan(School of Electrical Engineering and Information,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学电气信息工程学院,黑龙江大庆163318

出　　处：《吉林大学学报（信息科学版）》2021年第3期282-287,共6页Journal of Jilin University（Information Science Edition）

基　　金：黑龙江省自然科学基金资助项目(E2016013)。

摘　　要：在传统的振动测量中,激光监测装置只能测量电机的单个参数。为实现对轴中心高为56 mm及以上电机的机械振动测量,建立了双通道独立测量系统。该系统可用于同时测量电机转轴的速度以及转轴产生的振动。该实验基于法布里-珀罗干涉、散斑干涉原理得到含有振动信号和速度信号的混合信号,将合成信号分解后,运用希尔伯特变换解调振动信号以及自相关函数处理速度信号。实验结果表明,振动测量误差小于255 nm,速度测量相对误差小于0.11%。该系统结构紧凑,操作简单,易于实现,具有非接触性、抗电磁干扰强、高精度等优点。In the traditional vibration measurement,the laser monitoring device measures the single parameter of the motor only. To measure the mechanical vibration of the motor whose shaft center height is 56 mm and above,the dual channel independent measurement system is established,which can be used to measure the speed and vibration of the motor shaft at the same time. The vibration signal and velocity signal are obtained based on the principle of Fabry-Perot interference and speckle interferometry. After the synthetic signal is decomposed,the vibration signal is demodulated by Hilbert transform and the velocity signal is processed by autocorrelation function. The experimental results show that the accuracy of vibration measurement is less than 255 nm,and the relative error of velocity measurement is less than 0. 11%. The advantages of this experiment are non-contact,anti-electromagnetic interference and high precision. It is simple in structure and easy to operate and implement.

关 键 词：法布里-珀罗干涉 振动测量 转速测量 电机检测 

分 类 号：TP732[自动化与计算机技术—检测技术与自动化装置] TM306[自动化与计算机技术—控制科学与工程]