多通道时间间隔实时分析仪设计与实现  

Development of Multi-channel Time Interval Real-time Analyzer

作　　者：邓智峰 刘娅[1,2] 刘音华 肖波[1,2] 王嘉琛 DENG Zhi-feng;LIU Ya;LIU Yin-hua;XIAO Bo;WANG Jia-cheng(National Time Service Center,Chinese Academy of Sciences,Key Laboratory of Time and Frequency Standards,Chinese Academy of Sciences,Xi’an 710600,China;University of Chinese Academy of Sciences,Beijing 100039,China)

机构地区：[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　　处：《宇航计测技术》2021年第1期20-26,共7页Journal of Astronautic Metrology and Measurement

基　　金：陕西省自然科学基金重点项目-工业领域(2018ZDXM-GY-011)资助。

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@1000s;可以实时分析取样间隔1s到10000s的阿伦方差和时间偏差。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 45 ps,and the measurement stability can reach 5.68 ps@1000 s.Allan deviation and Time deviation can be analyzed in real time from 1 s to 10000 s.

关 键 词：时间间隔 多通道 阿伦方差 时间偏差 实时分析 

分 类 号：TH714[机械工程—测试计量技术及仪器]