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| 一种数字时钟的校准方法及验证装置 | |
| 引用本文： | 张宇,陈静,龙波,黄徐瑞晗,王菊凤,韩锋,沈力.一种数字时钟的校准方法及验证装置[J].计量学报,2020,41(12):1544-1551. |
| 作者姓名： | 张宇 陈静 龙波 黄徐瑞晗 王菊凤 韩锋 沈力 |
| 作者单位： | 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 |
| 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223.4ns,不确定度为100.1ns(k=1)。 |
| 关 键 词： | 计量学 数字时钟 秒脉冲 光电二极管 溯源 |
| 收稿时间： | 2020-08-04 |
A Calibration Method and Testing Device of Digital Clock |
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| ZHANG Yu,CHEN Jing,LONG Bo,HUANG-XU Rui-han,WANG Ju-feng,HAN Feng,SHEN Li.A Calibration Method and Testing Device of Digital Clock[J].Acta Metrologica Sinica,2020,41(12):1544-1551. | |
| Authors: | ZHANG Yu CHEN Jing LONG Bo HUANG-XU Rui-han WANG Ju-feng HAN Feng SHEN Li |
| Affiliation: | 1. Institute for Metrology and Calibration of Guizhou, Guiyang, Guizhou 550003, China 2. Inspection Institute of Quality Supervision Machinery & Electronics Products, Guiyang, Guizhou 550081, China |
| Abstract: | 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 223.4ns (U=100.1ns, k=1). |
| Keywords: | metrology digital clock 1PPS photodiode traceability |
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