宇航计测技术 ›› 2021, Vol. 41 ›› Issue (1): 20-26.doi: 10.12060/j.issn.1000-7202.2021.01.04

• 量值传递技术 • 上一篇    下一篇

多通道时间间隔实时分析仪设计与实现

邓智峰1，2；刘娅1,2；刘音华1,2；肖波1,2；王嘉琛1,2   

  1. 1.中国科学院国家授时中心，中国科学院时间频率基准重点实验室，陕西西安 710600；
    2.中国科学院大学，北京 100039
  • 出版日期:2021-02-25 发布日期:2022-03-07
  • 作者简介:邓智峰（1996.08-），男，助理研究员，硕士，主要研究方向：精密时间频率测量技术。
  • 基金资助:
    陕西省自然科学基金重点项目[KG-*4]-[KG-*7]工业领域（2018ZDXM-GY-011）资助。

Development of Multi-channel Time Interval Real-time Analyzer

DENG Zhi-feng1,2；LIU Ya1,2；LIU Yin-hua1,2；XIAO Bo1,2；WANG Jia-cheng1,2   

  1. 1.National Time Service Center,Chinese Academy of Sciences,Key Laboratory of Time and Frequency Standards,Chinese Academy of Sciences,Xi’an 710600,China;
    2.University of Chinese Academy of Sciences,Beijing 100039,China
  • Online:2021-02-25 Published:2022-03-07

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摘要： 针对现代时间间隔测量领域对测量仪器大量程、多通道、实时分析的要求，设计并实现了一台时间间隔实时分析仪原理样机。采用脉冲计数法对时间间隔进行大量程粗测，结合时间-数字转换芯片构建插值模块进行精密细测，整个仪器实现了8通道时间间隔的并行精密测量。同时使用低成本小型化的微控制器对时间间隔测量结果进行图形显示、实时分析和存储。测试结果表明，本仪器测量秒脉冲信号间时差标准差优于45ps，测量稳定度5.68ps@1 000s；可以实时分析取样间隔1s到10 000s的阿伦方差和时间偏差。

关键词: 时间间隔, 多通道, 阿伦方差, 时间偏差, 实时分析

Abstract: In order to meet the requirement of large range,multi-channel and real-time analysis,an 8-channel time interval real-time analyzer is designed and realized.In this paper,the coarse counter is used to measure the time interval in a large range,and the interpolators is constructed with the time-digital-converter chips to measure the time interval in a precise way.At the same time,a low-cost miniaturized microcontroller is used to display,analyze and store the time interval measurement results in real time.The test results show that the standard deviation of the measured second pulse signal interval is better than 45ps,and the measurement stability can reach 5.68ps@1 000s.Allan deviation and Time deviation can be analyzed in real time from 1s to 10 000s.

Key words: Time interval, Multi-channel, Allan deviation, Time deviation, Real-time analyze

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