皮秒级16通道精密事件计时器研制  

Development of picosecond 16 channels precise event timer

作　　者：陈法喜[1,2,3] 孔维成[1,2,4] 赵侃 刘涛[1,2] 张首刚[1,2] CHEN Fa-xi;KONG Wei-cheng;ZHAO Kan;LIU Tao;ZHANG Shou-gang(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;Key Laboratory of Time and Frequency Standards,Chinese Academy of Sciences,Xi’an 710600,China;School of Microelectronics,XiDian University,Xi’an 710071,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院时间频率基准重点实验室,西安710600 [3]西安电子科技大学,西安710071 [4]中国科学院大学,北京100049

出　　处：《时间频率学报》2020年第2期85-93,共9页Journal of Time and Frequency

基　　金：中国科学院战略性先导科技专项(B类)资助项目(XDB21030200)。

摘　　要：精密时间测量是高精度守时、授时、用时的基础,目前精密时间测量的设备主要依赖进口,尤其是皮秒级精密多通道的事件计时器。笔者研制的皮秒级16通道精密事件计时器,每个通道触发信号采用独立时间戳技术,通道间不存在测量死区,且不受指定的开门、关门信号或者参考通道的影响,可以灵活测量统计各个通道间触发信号的时间间隔,或者单个通道多个触发信号的时间间隔,拓宽了应用范围。皮秒级16通道精密事件计时器采用高速时间-数字转换的方式,并引入自动校准的方法来保证测量的准确度和稳定度,使测量分辨率优于5 ps,测量稳定度优于0.6 ps@1000 s,0.2 ps@10000 s。Precision time measurement is the basis for high-precision punctuality,time service and time usage.At present,the acquiring of the equipment for precision time measurement mainly relies on importation,especially the picosecond-level precision multi-channel event timers.The picosecond 16-channel precision event timer described in this article employs a technique of using independent time stamping on the trigger signals for each single channel.There is no measurement dead zone between the channels,and it is not affected by the designated switching-on/switching-off signals or the reference channels.Therefore,with great flexibility,the picosecond 16-channel precision event timer can measure and count the time interval of trigger signals between channels,and that between the multiple trigger signals of a single channel,which broadens the possibility of its application.The picosecond 16-channel precision event timer utilizes a high-speed time-to-digital conversion method and introduces an automatic calibration method to ensure the accuracy and stability of the measurement,making the measurement resolution better than 5 ps and the measurement stability better than 0.6 ps@1000 s and 0.2 ps@10000 s.

关 键 词：事件计时器 皮秒级 16通道 时间戳 

分 类 号：TH714.8[机械工程—测试计量技术及仪器]