飞秒激光频域干涉测距相位信号分析与处理  

Phase Ranging Signal Analysis and Processing of Femtosecond Laser Frequency Domain Interference

作　　者：刘娇月[1,2] 杨聚庆[3,2] 

机构地区：[1]河南工业职业技术学院柔性实验室,河南南阳473009 [2]中国科学院光电研究院,北京100094 [3]北京工业大学应用数理学院,北京100124

出　　处：《仪表技术与传感器》2015年第9期99-102,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金资助项目(No.61377103);北京工业大学研究生科技基金项目(No.ykj-2014-11443)

摘　　要：针对飞秒激光测距频谱干涉条纹信号,分析了被测距离精度对于相位信息采集与处理要求,详细介绍了光谱分辨干涉测距的数据处理过程。根据测距信号干涉谱的数学关系,推导了被测距离求解公式。采用快速傅里叶变换和坐标旋转数字计算法进行光谱分辨干涉信号处理,经过时域信号的傅里叶变换、信号相位解包裹、加窗函数时域信号滤波等环节,分别对飞秒激光测距频谱干涉条纹信号中每个频率的相位值进行处理和变换。系统仿真中,离散频谱分析的幅值最大误差从36.3%降低到15.1%。经过比对实验,该法能实现飞秒激光测距信号有效处理。In view of the femtosecond laser ranging spectrum interference fringe signals,requirements for phase information acquisition and processing to distance measurement precision were analyzed,data processing of interference spectral resolution distance measurement were introduced in details.According to the mathematical relationship of ranging signal interference spectrum,the measured distance formula was deduced.Fourier transform method was used to realize the spectral resolution of interference signal processing,after many links such as time-domain signal＇ s Fourier transform,signal＇ s phase solution package,add window function time-domain signal＇ s filtering,each frequency＇ s phase value of interference fringe signals was processed and transformed respectively.After system simulation,the biggest error of the amplitude of discrete spectrum analysis reduced from 36.3%to 15.1%.Through the comparison experiment,the method can realize femtosecond laser ranging signal processing effectively.

关 键 词：飞秒激光测距 光谱分辨干涉 相位信号处理 

分 类 号：TH741[机械工程—光学工程] TN249[机械工程—仪器科学与技术]