基于FPGA的科学级CCD相机时序发生器的设计

简述了科学级CCD相机中CCD成像单元的时序发生器的功能:产生TDI-CCD、视频处理器和图像数据输出所需的各种时钟脉冲信号,在CCD成像单元工作中起着时间上同步协调的作用。该科学级CCD相机采用DALSA公司的IL-E2型TDI-CCD作为传感器,在分析IL-E2型TDI-CCD器件驱动时序关系的基础上,设计了科学级CCD相机时序发生器。选用FPGA作为硬件设计平台,使用VHDL语言对时序发生器进行硬件描述,采用EDA软件对所设计的时序发生器进行仿真,针对XILINX公司的可编程器件XC2VP20-FF1152进行适配。结果表明:系统的集成度、抗干扰能力提高了,实现了科学级CCD相机工作时的可靠性、稳定性,以及低功耗,同时也使设计与调试周期缩短至小时量级。

The design of Timing Generator of Scientific Grade CCD Camera Based on FPGA

Briefly presented the Timing Generator' s functions of Scientific Grade CCD Camera:it generates various kinds of impulse sequence for the TDI- CCD and vision processor and imaging data output and acts as the synchronous coordinator for time in the CCD imaging unit. The IL- E2 TDI- CCD sensor produced by DALSA Co.Ltd. has been used the Scientific Grade CCD Camera . Driving schedules of IL- E2 TDI- CCD sensor has been examined in detail ,the driving schedule generator has been designed for Sci- entific Grade CCD Camera.FPGA has been chosen as the hardware design platform,schedule generator has been described with VHDL. The designed generator has been successfully fulfilled function simulation with EDA software and fitted into XC2VP20 - FF1152(a kind of FPGA products that made by XILINX).The experiments indicate that the new method improved the integrated level of the system.The Scientific Grade CCD camera system' s high reliability,stability and low power supply are achieved.At the mean- time, the period of design and experiment is sharply shorted.