摘要
由高速图像采集子系统和GPS精密授时子系统构成,为图像采集提供精确的时间基准。设计并实现了基于PCI总线的GPS时间获取板卡,并完成了一系列软件的设计开发。首先通过CPLD硬件实时获取GPS授时,其次PCITARGET结合操作系统内核驱动将该时间传入系统内核,最后用事件通知的方法由内核将该时间传递给望远镜终端图像采集程序做时间标记。实验测试结果表明,系统获取时间的精确度可以达到毫秒极,完全满足天文望远镜观测系统的需求。
A GPS time marking system is designed based on PCI bus in image processing system of solar telescope. A time standard is made for synchronization system among astronomical telescopes. A PCI card and a series of software for GPS time acquisition are designed and implemented. First, the GPS time is received and buffered by CPLD. Second, the GPS time is sent to the kernel of the operating system through the PCI target controlled by the relative system control kernel driver. Last, the GPS time is sent to image processing program to make marks by the kernel of the operating system though Event Notice. Experimental results show that the time precision can get to millisecond which could perfectly meet the needs of astronomical observation.
出处
《微计算机信息》
2009年第7期170-172,共3页
Control & Automation
基金
申请人:艾国祥邓元勇
基金项目名称:太阳物理前沿问题和空间太阳望远镜科学预研
颁发部门:中科院基础局(No.KJCX2-YW-T04)
