| 地基大型望远镜数字通信系统的设计 |
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| 引用本文： | 贾建禄,赵金宇,杨轻云,陈璐.地基大型望远镜数字通信系统的设计[J].红外与激光工程,2015,44(2):596-600. |
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| 作者姓名： | 贾建禄 赵金宇 杨轻云 陈璐 |
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| 作者单位： | 1.中国科学院长春光学精密机械与物理研究所,吉林长春130033; |
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| 摘 要： | 数据通信系统是整个大型望远镜的数据传输中枢。针对地基大型望远镜分系统多,信号种类繁杂、分布不均匀和分布距离较远等特点,设计了一种基于大规模集成电路FPGA的数据通信系统。系统分为机上数据通信系统和机下数据通信系统两部分,机上与机下数据通信系统通过单根光纤进行连接。系统最多可提供60路RS422、32路TTL、10路RS485和4路RS232同步传输。同时,系统以GPS时钟频率为基准频率产生多种工作时序,为望远镜提供同步工作脉冲;通过采集曝光脉冲对应时刻的时间数据和编码器数据锁存当前的时空信息。硬件方面采用XILINX公司的Virtex-5系列FPGA为核心处理芯片完成该系统的设计,实验结果表明系统可满足大型望远镜数据通信的需求。
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| 关 键 词： | 地基大型望远镜 FPGA 数字通信系统 |
| 收稿时间： | 2014-06-17 |
Data communication system for large ground-based telescope design |
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| Jia Jianlu,Zhao Jinyu,Yang Qinyun,Chen Lu.Data communication system for large ground-based telescope design[J].Infrared and Laser Engineering,2015,44(2):596-600. |
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| Authors: | Jia Jianlu Zhao Jinyu Yang Qinyun Chen Lu |
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| Affiliation: | 1.Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;2.University of Chinese Academy of Sciences,Beijing 100049,China |
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| Abstract: | The communication system which was the point of large ground-based telescope was presented, for meeting partial systems'large number, data classes'variety, data transmitting long distance and data's uneven distribution. The system was made up by up data communication system and the bottom one. By using FPGA, the maximal communication capability of system was promoted to transmit 60 paths of RS422, 32 paths of TLL, 10 paths of RS485 and 4 paths of RS232 in one time, while the connection between up and bottom system was single optical fiber. In addition, the telescope's working clock was supported by GPS, and the real-time spatial and time information was given by catching exposure signal's time and encoder data. The XILINX's Virtex-5 FPGA was designed in the heart place. The experiment results indicate that the system is valuable for large ground-based telescope. |
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| Keywords: | large ground-based telescope FPGA communication system |
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