基于Camera Link的串行图像采集系统设计

在设计测试系统时,要求高速、可靠地传输大量的图像信息至上位机进行存储和处理。采用LVDS或HOTLink信号格式,将远程CCD采集的图像信号进行串行传输,由 FPGA乒乓操作进行缓存,通过Camera Link接口,将图像数据以串行方式高速传输至图像采集板卡PXI-1428。实验中以150fps的速度连续采集128×130大小的串行LVDS图像或500fps的HOTLink图像,最大传输速率达到320Mbps。实验结果表明,Camera Link是实现高速串行图像传输的便捷途径。

Design of serial image acquisition system based on Camera Link

It is required to transmit large amount of image information stably at high speed for storage and process when designing a testing system. Image data acquired by remote CCD can be transmitted serially in form of Low Vlotage Differential Signal (LVDS) or HOTLink. The data were buffered by ping-pang operation of FPGA. Images can be serially transmitted at high speed to grabber PXI-1428 through Camera Link. The grabber can acquire an image of 128×130 pixels at a speed of 150 fps in LVDS format, or 500 fps in HOTLink format. The top transmission speed can reach 320 Mbps. It is demonstrated that Camera Link can be conveniently applied to high speed, serial image transmission.