振动目标光学微多普勒信号的获取与处理研究

Study on Acquisition and Analysis for Optical Micro-Doppler Signal of Vibrating Targets

建立了一套工作于光波段的微多普勒效应探测系统,并开展了探测振动目标微多普勒效应的实验研究,成功获取了由目标微小振动引起的微多普勒信号。对信号进行了频谱分析和时-频域的联合分析,结果表明:时频分析方法适合于时变微多普勒信号的分析,应用该方法能够有效地提取出目标的运动特征。本研究为应用微多普勒效应实现目标的探测、分类和识别奠定了基础。

A detection system for micro-Doppler effect worked in optic waveband was presented,experiments were conducted for the detection of vibration induced micro-Doppler effect, and the micro-Doppler signal was acquired successfully. Frequency domain analysis and time-frequency joint analysis were conducted for the micro-Doppler signal. Results show that time- frequency analysis method is fit for the analysis of time-varying micro-Doppler signal,the dynamic character was effectively extracted using this method. This paper laid the foundation for target detection,classification and recognition by the study on micro-Doppler effect.