新型多普勒成像激光雷达原理设计与仿真

采用相干多普勒测量手段获取目标面型变化信息具有明显的优势。基于激光多普勒效应，设计一套多普勒成像激光雷达实验系统，同时引入APFFT全相位测相处理思路对外差信号进行时频分析，抑制频谱泄露，减小噪声对测量结果的影响，获取高测量精度信号时频曲线。在MATLAB软件simulink交互式仿真集成环境中进行过程仿真，证明其可以实现对扫描空间高分辨率、高精度的成像。实验结果表明:该系统能够较好还原被测目标表面特性，为激光雷达实现对目标高分辨率与高灵敏度成像提出新的解决思路。

Schematic design and simulation of new Doppler imaging laser radar

The means of coherent Doppler has obvious advantages to obtain the target range change. Based on laser Doppler effect, designed a set of imaging Doppler lidar experimental system. Introduction all phase measurement phase treatment consideration to do time-frequency analysis for heterodyne signal, restraining spectral leakage and reducing the impact of noise on the measurement results, a high measurement accuracy signal frequency curve will be acquired. The process simulation in the simulink interactive simulation integration environment which comes with MATLAB software, to prove it can achieve higher resolution, high precision imaging for scan space. The experimental results show that the system was able to restore the surface of target feature preferably. It plays a promoting role in high-resolution and high-sensitivity imaging of the target for lidar.