| 基于GPSD的高精度校时系统 |
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| 引用本文： | 于佳,邓元勇.基于GPSD的高精度校时系统[J].现代电子技术,2012,35(3):45-48. |
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| 作者姓名： | 于佳 邓元勇 |
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| 作者单位： | 中国科学院国家天文台,北京,100012 |
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| 基金项目： | 国家自然科学基金——青年基金(0911181001);国家天文台青年人才基金(0835032002) |
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| 摘 要： | 天文观测设备对于控制系统的时间准确度有严格要求。为此,采用搭建高精度NTP服务器的方法实现系统校时。基本思路是从NMEA0183数据中提取时间信息,通过PPS信号来保证高精度。具体实现方法是采用GPS接收模块G591来构造硬件电路,软件部分需要NTP服务器软件和GPSD的正确安装和配置。对照实验表明,基于GPSD的NTP服务器校时精度可以达到微秒量级,工作性能稳定而可靠。
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| 关 键 词： | 天文仪器 校时 高精度 NTP GPSD PPS NMEA |
The high-precision time synchronous system based on GPSD |
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| YU Jia
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DENG Yuan-yong.The high-precision time synchronous system based on GPSD[J].Modern Electronic Technique,2012,35(3):45-48. |
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| Authors: | YU Jia DENG Yuan-yong |
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| Affiliation: | (National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China) |
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| Abstract: | In order to correct the time of astronomical facilities precisely,a method of building high-precision NTP server is introduced,which can collect valid timestamp from the NMEA data,and keep high accuracy using PPS signal.The hardware circuit was constructed using G591 GPS module and the steps of building the high-precision NTP server are proposed.Three experiments show that the NTP server based on GPSD is precise,stable and reliable. |
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| Keywords: | astronomical facilities time synchronization high-precision NTP GPS PPS NMEA |
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