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本文报道了基于空间滤波法对变加速运动物体表面运动速度进行实时测量的实验研究。采用 CCD线阵同时作为空间滤波器和光电转换器件。由 CCD线阵实现的差分栅式空间滤波器不仅消除了零频分量对低速运动测量的不利影响 ,而且导致了一种快速动态累加采样方法。实验结果表明 ,这一方法可对变加速物体运动速度进行实时测量 ,同时扩大了测量动态范围
This paper reports the experimental study on the real-time measurement of the surface velocity of variable-speed moving objects based on the spatial filtering method. Using CCD line at the same time as the spatial filter and photoelectric conversion devices. The differential grating spatial filter implemented by the CCD linear array not only eliminates the negative effect of zero-frequency component on low speed motion measurement, but also leads to a fast dynamic summation sampling method. Experimental results show that this method can measure the moving speed of variable-speed objects in real time and enlarge the measurement dynamic range