TDI-CCD交汇测量系统同步控制的建模及仿真研究

建立了TDI CCD交汇测量系统中CCD行扫描速率和目标运动速率同步控制的数学模型。该模型综合考虑了目标长度、目标运动速率、TDI CCD行扫描速率、成像系统放大倍数、TDI CCD像元尺寸等因素。通过计算机仿真研究发现 ,当TDI CCD行扫描速率和目标运动速率相差较大时 ,在不降低信噪比的情况下 ,系统探测灵敏度及对高速小目标物体的捕获几率仍有很大的提高。也就是说 ,在TDI CCD交汇测量系统中对CCD行扫描速率和目标运动速率同步误差的要求将远远低于± 2 %。

Modeling and simulating research on synchronism controlling in the TDI-CCD intersection measuring system

The math model about synchronism controlling between line scanning rate of CCD and object moving speed in the TDI CCD intersection measuring system is established. This model synthetically considers length and velocity of target object,line scanning rate of TDI CCD,magnifying power of imaging system,size of pixel,and so on. The computer simulating investigation shows,when the difference between line scanning rate of TDI CCD and object moving speed is bigger,detecting sensitivity and target captive probability of this system are raised largely,and the ratio of signal to noise is not decreased. That is to say,the demand on the synchronism error between line scanning rate of TDI CCD and object moving speed is far lower than ±2%。