摘要
激光自混合能有效用于匀速运动物体的速度测量,为了加速激光自混合用于物体速度测量的实用化进程,对激光自混合用于变速运动物体的速度测量进行了探索。引入了基于多项式相位参数提取的信号处理算法;基于激光自混合的测速原理,推导了激光自混合用于变速测量时输出信号的多项式相位表示式,也即建立了激光自混合用于变速测量的仿真模型。通过仿真分析证明:在激光自混合变速测量中采用基于相位多项式参数提取的方法,可以获得物体运动的速度和加速度信息;该方法在较低信噪比的情况下仍然适用。
Time-varying velocity measurement by self-mixing laser diode is studied. A signal processing based on polynomial phase parameter estimation is presented. Based on the principle of self-mixing laser diode velocity measurement,polynomial phase expression of the laser diode output is deduced when the self-mixing laser diode is used to measure time-varying velocity. Namely,a model is proposed for the simulation of time-varying velocity measurement. At last,the signal processing based on polynomial phase is used to obtain target＇s velocity and acceleration. The simulation results prove the validity of the algorithm even in the situation of low SNR.
出处
《光电工程》
CAS
CSCD
北大核心
2010年第1期120-124,共5页
Opto-Electronic Engineering
基金
中国工程物理研究院科学技术发展基金重点课题(2007A05001)
中物院电子工程研究所科技创新基金(S20070202)
总装预研基金(9140A05070208ZW0502)
教育部访问学者基金资助
关键词
变速测量
多项式相位
快速傅里叶变换
自混合干涉
激光测量
time-varying velocity measurement
polynomial phase
fast Fourier transform
self-mixing interference
laser measurement
