一种数字时钟的校准方法及验证装置  

A Calibration Method and Testing Device of Digital Clock

作　　者：张宇 陈静 龙波[1] 黄徐瑞晗 王菊凤[1] 韩锋[1] 沈力[1] ZHANG Yu;CHEN Jing;LONG Bo;HUANG-XU Rui-han;WANG Ju-feng;HAN Feng;SHEN Li(Institute for Metrology and Calibration of Guizhou,Guiyang,Guizhou 550003,China;Inspection Institute of Quality Supervision Machinery&Electronics Products,Guiyang,Guizhou 550081,China)

机构地区：[1]贵州省计量测试院,贵州贵阳550003 [2]贵州省机械电子产品质量检验检测院,贵州贵阳550081

出　　处：《计量学报》2020年第12期1544-1551,共8页Acta Metrologica Sinica

基　　金：贵州省科技计划(黔科合支撑[2019]2881号)。

摘　　要：为准确测量数字时钟示值偏差,保障数字时钟溯源的有效性,提出并设计一种数字时钟的校准方法及验证装置。采用PIN结硅光电二极管对数字时钟的数码管进行检测,将多路检测信号运算放大,与阈值电压进行比较后输出逻辑电平,再经过秒脉冲发生电路输出秒脉冲信号与标准时间秒脉冲进行比较测量。实验表明,验证装置延时223.4 ns,不确定度为100.1 ns(k=1)。To measure accurately offset of indication for digital clock and ensure traceability,a calibration method and testing device of digital clock are proposed and designed.The PIN silicon photodiode is used to detect the digital tube of digital clock,the multi-channel detection signal is amplified and compared with the threshold voltage to output TTL,and then the 1PPS is output through the 1PPS generation circuit,which is compared with the standard 1PPS.The experiment show that the delay of the testing device is 223.4 ns(U=100.1 ns,k=1).

关 键 词：计量学 数字时钟 秒脉冲 光电二极管 溯源 

分 类 号：TB939[一般工业技术—计量学]