实时高速LVDS串行数据采集系统的设计  

Design of High Speed and Real-time LVDS Serial Data Acquisition System

作　　者：邵华 刘亚斌[1] 徐志跃[1] 

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100083

出　　处：《计算机测量与控制》2008年第3期424-426,共3页Computer Measurement &Control

基　　金：国家自然科学基金资助项目(50375008和60575052)

摘　　要：主要讨论了LVDS的信号特点,并重点讨论了图像信号时序的分析和转换以及模拟摄像机与PXI 1422的时序,提出了在考虑导引头图像数据凝视发送方式和线扫交替发送方式两个模式下的信号转换方法,并比较了FIFO操作和乒乓操作两种高速信号传输处理的特点,以及它们对系统采集时序的影响;经实验测试,采用乒乓操作方法对线扫发送的图像信号进行处理,大大简化上位机图像采集的软件设计;通过大量的实验表明,此方法对于实现图像信号的实时显示与存储是完全可行的。this article manly discuss the feature of LVDS signal, and emphasize the analysis of the image signal timing and transformation as well as the timing matching between the simulated camera and PXI 1422,propose the signal transformation method considering sending infrared seeker image data at gazing mode and profile scanning mode,compare the feature of the high speed signal transformation between FIFO operation and ping-pong operation and the effect on the system capturing timing.It is proved that using ping-pong operation to process the profile scanning image data,simplify the image capturing software design in the upper computer greatly.This method is wholly feasible to implement the image real-time display and Storage.

关 键 词：LVDS 图像采集 FIFO 兵乓操作 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]