一种高精度微动勘探同步时钟的研究及实现

针对现有微动勘探台阵中各观测仪对数据采集具有高精度同步的要求,提出了一种基于GPS与恒温晶振互补协调工作的高精度时钟方案。该时钟方案的作用是产生数据采集同步脉冲和协调世界时（UTC）信息,通过频移键控（FSK）将信息进行调制和解调。各观测仪对解调后的信息进行相位延时修正,得到数据采集同步脉冲和UTC信息。测试和实验结果表明,UTC信息能够准确的对数据采集进行时间记录,数据采集同步脉冲精度优于200 ns,解决了各观测仪对数据采集高精度同步的要求,大大提升了微动勘探的准确性。...

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Bibliographic Details
Published in电测与仪表 Vol. 52; no. 24; pp. 24 - 28
Main Author 王国富 陈巍 张法全 叶金才
Format Journal Article
LanguageChinese
Published 桂林电子科技大学信息与通信学院,广西桂林541004 2015
广西无线宽带通信与信号处理重点实验室,广西桂林541004%桂林电子科技大学信息与通信学院,广西桂林,541004
Subjects
卡尔曼滤波
同步时钟
微动勘探
高精度
microtremor exploration
high precision
高精度
卡尔曼滤波
同步时钟
Kalman filter
synchronous clock
微动勘探
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ISSN1001-1390

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Summary:针对现有微动勘探台阵中各观测仪对数据采集具有高精度同步的要求,提出了一种基于GPS与恒温晶振互补协调工作的高精度时钟方案。该时钟方案的作用是产生数据采集同步脉冲和协调世界时（UTC）信息,通过频移键控（FSK）将信息进行调制和解调。各观测仪对解调后的信息进行相位延时修正,得到数据采集同步脉冲和UTC信息。测试和实验结果表明,UTC信息能够准确的对数据采集进行时间记录,数据采集同步脉冲精度优于200 ns,解决了各观测仪对数据采集高精度同步的要求,大大提升了微动勘探的准确性。
Bibliography:A scheme based on high-precision synchronous clock and work in harmony of GPS and oven controlled crystal oscillators was proposed in this paper to achieve the requirement of the data acquisition for microtremor exploration. The role of the clock scheme is to generate data acquisition of synchronous pulse and coordinated universal time information（ UTC）. And the information is modulated and demodulated by frequency shift keying（ FSK）. After each observation instrument received demodulated information and to delay the phase correction,the data acquisition synchronization pulse and the UTC information are obtained. The test and experiment results show that the UTC information can accurately record the time for data collection,and the synchronization accuracy is better than 200 ns for data acquisition in this system. This method solves the requirement of high accuracy of synchronous in the observation instruments,and improves the accuracy of the microtremor exploration.
microtremor exploration; high precision; Ka
ISSN:1001-1390