摘要
针对地基大口径望远镜在定位、授时以及红外分系统相机外同步触发方面的需求,设计了一套北斗/GPS接收系统。某型号国产导航模块接收北斗/GPS系统的定位和授时信息;高速单片机C8051F120为主控制器,负责信息提取、数据运算、系统通信和界面显示;CPLD/EPM570T100为协控制器,对标准秒脉冲分频,输出2路授时时钟信号和一路频率可调的外同步触发信号;系统使用RS422串行通信标准与望远镜系统通信,满足了远距离串行通信的可靠性。经实验得出,系统的定位精度为3m,授时精度为50ns,授时时钟分辨率为2ms,满足望远镜系统需要。
A design method of BeiDou/GPS receiver system is proposed,to meet requirements of a large ground-based telescope＇s timing and positioning service.What＇s more,the camera of the IR sub-system needs an external trigger signal.An indigenous navigation module receives positioning and timing data from BeiDou or GPS; High-speed MCU C8051-F120,as the master controller,is in charge of picking up valid information,data processing,system communication and interface displaying.As the assistant chip,CPLD /EPM570T100 divides the standard PPS,and outputs an external trigger signal and two timing clock.Using RS422 to communicate with the telescope system meets the reliability of long-distance communication.Concluded of experiments,positioning accuracy of the system is 3 m,timing accuracy is 50 ns,resolution of the timing clock is 2 ms,satisfying with the needs of the telescope system.
出处
《电子测量技术》
2013年第11期67-70,共4页
Electronic Measurement Technology
作者简介
刘俊池,1988年出生,硕士研究生,主要研究方向为嵌入式系统开发和伺服控制方面.E-mail：302880362@qq.com
