A novel method for analyzing a rotating target by an orthogonal-beam Doppler velocity measurement system on the basis of a single laser diode is presented. Using the method of fast Fourier transform after smoothing filter, we can obtain two groups of Doppler frequency shifts in the spectrum to calculate the velocity of a rotating target. A theoretical analysis and an experimental setup have been implemented. Experimental results show that a relative error of this velocity-measuring system is less than 0.5%.

中文翻译：

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基于单个激光二极管的正交光束多普勒速度测量系统

提出了一种基于单个激光二极管的正交光束多普勒速度测量系统分析旋转目标的新方法。使用平滑滤波器后的快速傅立叶变换方法，我们可以获得频谱中的两组多普勒频移，以计算旋转目标的速度。进行了理论分析和实验设置。实验结果表明，该测速系统的相对误差小于0.5％。