用于动态目标跟踪的面阵CCD成像系统

Area CCD imaging system used in moving target tracking

采用面阵CCD ICX415AL作为传感器件,设计了一种新型的用于动态目标跟踪的面阵CCD成像系统。成像系统对两片面阵CCD进行光学拼接,使其完全共面,从而保证在目标分辨率不变的情况下使视场角增加一倍,满足了大视场搜索目标的要求。在介绍面阵CCD ICX415AL的结构和特点的基础上,完成了ICX415AL的时序电路和功率驱动电路的设计,并采用相关双采样(CDS)技术滤除了视频信号中的相关噪声,提高了系统的信噪比。为了获得好的成像质量,对所设计的系统进行了辐射定标。根据文中的定标实验数据,确定了最佳的动态范围和工作点。实验结果表明:在曝光时间为0.192~0.72 ms时,成像系统工作正常,在曝光时间为0.32 ms时,成像系统动态范围最大。整个系统采用现场可编程门阵列(FPGA)作为核心控制器件,完成自上而下的模块化设计,实现了硬件设计的软件化,提高了开发效率。

An imaging system for moving target tracking is designed by using an area CCD ICX415AL as the sensor.The imaging system stitches up the two slices of area CCD,and makes them share a complete surface to ensure twice as larger the angle of visual field under a constant condition of target resolution capacity,which can meet the requirements for searching target in a large visual field.The structure and the specification of area CCD ICX415AL sensor are introduced,and then the circuits of working clock and power...