CAJ | 학술논문

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。
침대비초격광측거빈보간섭조문신호，분석료피측거리정도대우상위신식채집여처리요구，상세개소료광보분변간섭측거적수거처리과정。근거측거신호간섭보적수학관계，추도료피측거리구해공식。채용쾌속부리협변환화좌표선전수자계산법진행광보분변간섭신호처리，경과시역신호적부리협변환、신호상위해포과、가창함수시역신호려파등배절，분별대비초격광측거빈보간섭조문신호중매개빈솔적상위치진행처리화변환。계통방진중，리산빈보분석적폭치최대오차종36．3％강저도15．1％。경과비대실험，해법능실현비초격광측거신호유효처리。
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 dis-tance 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 sig -nal 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 .