摘要
针对某航空相机的设计要求,提出了一种可行的多模式驱动时序设计方法。采用柯达公司的KAI-2093行间转移型面阵CCD传感器,结合它的结构特点和双通道数据传输的思想分析了传感器驱动时序关系,提出了3种驱动模式:binning、no-binning和TDI模式。以Altera公司的FPGA芯片EP1C6Q240作为时序发生器并实现数据的缓存和拼接,从而实现了时序发生器与数据处理器的一体化设计。在QUARTUSII7.0开发环境下采用VHDL语言编程,通过Modelsim AE6.1b实现数据缓存器的仿真。实测结果表明,所设计的驱动时序满足KAI-2093的时序要求,binning模式下帧频可达60帧/s,120帧/s等,满足高速跟踪要求;no-binning模式下全帧输出帧频可达30帧/s;TDI模式下能保证CCD长时间工作而不影响成像质量,该设计方法提高了系统的集成度和抗干扰能力。
This paper put forward an available method aimed at the requirements of aerial camera with multi-mode.Driving schedules of interline transfer progressive scan KAI-2093 CCD sensor produced by Kodak corporation have been examined based on the structure and theory of dual-channel transmission.Three kinds of driving mode have been designed： binning,no-binning and TDI mode.The design takes the FPGA EP1C6Q240 produced by Altera corporation as the schedule generator to realize data cache and mosaics.QUARTUSII7.0 has been chosen as the software design platform.Driving schedule generator is described with VHDL.The design of data cache and mosaics has been fulfilled though simulation by Modelsim AE6.1b.Experimental results indicate that the schedule can output CCD signals at the speed of 60 frames/s,120 frames/s etc in binning mode,which can meet the requirements of moving target tracking with high speed;and can output full frame at the speed of 30 frames/s in no-binning mode;and does not affect image quality for long-time working in TDI mode.The system integration and anti-jamming capability have been improved.
出处
《液晶与显示》
CAS
CSCD
北大核心
2011年第1期105-110,共6页
Chinese Journal of Liquid Crystals and Displays
基金
国家"863"高技术研究发展计划资助项目(No.863-2-5-1-13B)
