基于Camera Link总线的CCD高速图像采集技术

A Study on Camera-Link-Based High-Speed CCD Image Acquisition Techniques

现代天文学研究越来越依赖于高质量的天文观测结果。针对天文实测的需要,对基于Camera Link总线的CCD高速图像采集技术进行了系统调研,分析对比了Camera Link总线技术及其优缺点,对基于Camera link接口的高速CCD采集技术进行了深入的研究,着重讨论了单缓存与双缓存高速采集技术和实现机制。经实际测试,所实现的技术稳定、可靠,CPU负载低,采集速度达到了厂家给出的CCD相机的最高采集速度,可以满足天文大数据量采集与准实时观测的需要。

Astronomical research is increasingly relying on high-quality observing results.Considering the needs of real-time astronomical observation,in this paper we systematically investigate CCD high-speed image acquisition techniques based on Camera-Link bus,and compare their advantages and disadvantages to other three types of mainstream bus technologies.We discuss in detail the Camera-link interface of CCD high-speed image acquisition techniques.We emphatically discuss such acquisition techniques with single or dual buffers by proposing their implementations.Our experimental results show the stability and reliability of these techniques.Particularly,the CPU loads are low,and the acquisition speeds of CCD cameras can reach the highest set by the manufacturers.The techniques can thus meet the requirements of the astronomical magnanimity on data collection and real-time observation.