Simultaneous measurement of distance and speed using frequency-modulated continuous-wave self-mixing interferometry and all-phase fast Fourier transform  

作　　者：Jinyuan Yuan Bin Liu 袁锦源;刘斌(School of Physics and Optoelectronics,Xiangtan University,Xiangtan 411105,China;SECTE,University of Wollongong,Wollongong NSW 2522,Australia)

机构地区：[1]School of Physics and Optoelectronics,Xiangtan University,Xiangtan 411105,China [2]SECTE,University of Wollongong,Wollongong NSW 2522,Australia

出　　处：《Chinese Optics Letters》2024年第7期29-34,共6页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.62005234);the China Scholarship Council Post-Doctoral Program(No.202107230002);the Natural Science Foundation of Hunan Province(No.2024JJ6434).

摘　　要：In this work,we propose a method using frequency-modulated continuous-wave(FMCW)self-mixing interferometry(SMI)and all-phase fast Fourier transform(APFFT)for simultaneous measurement of speed and distance.APFFT offers superior accuracy in frequency determination by mitigating issues like the fence effect and spectrum leakage,contributing to the high-accuracy measurement for speed and distance.Both simulations and experiments have demonstrated relative errors at the levels of 10^(−4) and 10^(−3) for distance and speed measurements,respectively.Furthermore,factors impacting measurement performance have been discussed.The proposed method provides a high-performance and cost-effective solution for distance and speed measurements,applicable across scientific research and various industrial domains.

关 键 词：self-mixing interferometry frequency-modulated continuous-wave interferometry all-phase fast Fourier transform measurement of distance and speed 

分 类 号：O439[机械工程—光学工程]