激光多普勒测速测振信号处理方法的约束解析  

Bound Analysis of Signal Processing Method on Laser Doppler Velocity & Vibration Measurement

作　　者：彭翔[1] 刘博[1] Peng Xiang;Liu Bo(Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China)

机构地区：[1]中国科学院光电技术研究所,四川成都610209

出　　处：《系统仿真学报》2018年第5期1927-1934,共8页Journal of System Simulation

基　　金：国家973计划(2014CB744204);国家自然科学基金(61501429);中国科学院青年创新促进会资助项目(2016335)

摘　　要：激光多普勒测量技术,在现代高精度测量领域中越来越受到关注和应用。对于不同的信号特性和处理方法,测量将受到不同的约束,会决定测量结果的精细度和准确度。基于激光多普勒测速测振的原理和数字信号处理的理论角度,根据信号的采样率、数据长度、时间间隔等各个输入状态形成的约束条件得到了重点分析。对二次数据采用时间间隔均匀化的处理方法,以及外差测量方式下参考光频率与信号采样频率发生混叠时对测量范围的影响也得以逐一论证。经程序仿真和实验验证,在算法推算出的测量范围内,能够快速准确地获得高精度的测量结果。Laser Doppler measurement technology has attracted more and more attention and application in the field of high precision measurement. For different signal characteristics and processing methods, there are different constraints of the measurement, which would determine the measurement precision and accuracy. Based on the principle of laser Doppler velocity ＆ vibration measurement and from the perspective of digital signal processing, the constrains related to the sampling rate, data length and time interval are analyzed. The time-interval homogenization processing method of the second sampling data, and the effect on the t range ofaliasing about reference light frequency and signal sampling frequency with heterodyne measurement method are also respectively studied. Experimental results show that the algorithm can obtain accurate measurement results quickly and accurately in the inferred measurement range.

关 键 词：多普勒效应 测量分辨率 数据间隔均匀化 频率混叠 

分 类 号：TP394.1[自动化与计算机技术—计算机应用技术] TH691.9[自动化与计算机技术—计算机科学与技术]