数字式时钟校准方法及系统研究  

Calibration method and system of digital clock

作　　者：张宇 龙波[1] 沈力[1] 韩锋[1] 杨霏[1] 胡波 ZHANG Yu;LONG Bo;SHEN Li;HAN Feng;YANG Fei;HU Bo(Institute for Metrology and Calibration of Guizhou,Guiyang 550003,China)

机构地区：[1]贵州省计量测试院,贵州贵阳550003

出　　处：《工业计量》2024年第2期4-7,共4页Industrial Metrology

基　　金：国家重点研发计划(2021YFF0600102)。

摘　　要：为解决数字式时钟校准问题,对其展开校准方法和系统的探讨,给出了显示时刻误差、1PPS时间偏差、相对频率偏差和日差的校准项目并结合实验详细阐述了显示时刻误差的校准方法,针对显示时刻误差这项主要计量特性,评定了不确定度,编写了显示时刻误差的校准软件,自动进行跳变帧提取、误差计算和数据记录。实验结果表明,当标准数字时钟的显示分辨力达到1 ms时,被校数字式时钟显示时刻误差校准结果的扩展不确定度为1 ms(k=2)。To solve the calibration problem of digital clock,the calibration methods and system were discussed.The calibration items of instant time offset,1PPS time offset,frequency offset and daily time offset are given.Calibration method of instant time offset is described in detail.According to the instant time offset,the uncertainty of the instant time offset is evaluated,and the calibration software of instant time offset is written to automatically extract jump frames,calculate error and record data.The experimental results show that the expanded uncertainty of instant time offset is 1 ms(k=2)while the resolution of standard digital clock is 1 ms.

关 键 词：数字式时钟 时刻误差 校准方法 不确定度 

分 类 号：TH714.51[机械工程—测试计量技术及仪器]