量子电子学报2016，Vol.33Issue(4)：399-404,6.DOI:10.3969/j.issn.1007-5461.2016.04.003
基于双时域傅里叶变换的相位测量算法
Phase measurement algorithm based on double time domain Fourier transform
摘要
Abstract
In order to accurately extract the phase of the measured object in a vibrating environment,a phase extraction algorithm based on double time domain Fourier transform is proposed.A time domain light intensity signal with two interference periods is divided into several sub-segments with one period.The phase shift frequency introduced by phase shifter and other interference frequencies are separated by carrying out Fourier transform twice.Simulation and experimental results show that the algorithm significantly improves the system's ability to resist interference under the premise of not improving the system complexity and greatly reducing the data acquisition amount.Compared with the traditional four step phase shift algorithm under the ideal condition,the root mean square error of the measurement can reach 0.062 rad.The proposed method is without manual intervention from acquisition to phase extraction of the measured object,which is conducive to the realization of automation.关键词
傅里叶光学/相位测量/相移/非线性滤波器/随机噪声Key words
Fourier optics/phase measurement/phase shift/nonlinear filter/random noise分类
数理科学引用本文复制引用
刘胜德,吕晓旭,钟丽云,黄伟楠,王妍,陈玉冰..基于双时域傅里叶变换的相位测量算法[J].量子电子学报,2016,33(4):399-404,6.基金项目
Supported by National Natural Science Foundation of China(国家自然科学基金,61475048,61575069) （国家自然科学基金,61475048,61575069）
