Micro-vibration parameters fast demodulation algorithm and experiment of self-mixing interference  

作　　者：王秀琳 王路 陈敏亮 黄文财 

机构地区：[1]Department of Physics Jimei University [2]Department of Electronics Engineering Xiamen University

出　　处：《Optoelectronics Letters》2014年第4期304-307,共4页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61308048);the Natural Science Foundation of Fujian Province(No.2013J01244);the Li Shangda Foundation in discipline construction(No.C513030)

摘　　要：Self-mixing interference(SMI) technique can be used for measuring vibration, displacement, velocity and absolute distance. In this paper, a simple demodulation algorithm for fast measuring frequency and amplitude of a simple harmonic vibration target is proposed based on the basic theoretical model of self-mixing interference effects. The simulative results show that the error between the vibration parameters which are demodulated by this algorithm and initial settings merely results from the sample rate. Further, the experimental system of self-mixing vibration measurement is built. The experimental results have a good agreement with simulation analyses. The maximum error of frequency demodulation is less than 1 Hz in our experiment.Self-mixing interference （SMI） technique can be used for measuring vibration, displacement, velocity and absolute distance. In this paper, a simple demodulation algorithm for fast measuring frequency and amplitude of a simple harmonic vibration target is proposed based on the basic theoretical model of self-mixing interference effects. The simulative results show that the error between the vibration parameters which are demodulated by this algorithm and initial settings merely results from the sample rate. Further, the experimental system of self-mixing vibration measurement is built. The experimental results have a good agreement with simulation analyses. The maximum error of frequency demodulation is less than 1 Hz in our experiment.

关 键 词：自混合干涉效应 解调算法 实验系统 微振动 测量频率 最大误差 绝对距离 简谐振动 

分 类 号：TN24[电子电信—物理电子学]