最小二乘法在漂移率和老化率中的应用与不确定度评估  

Application of Least Squares Method and Uncertainty Evaluation in Drift Rate and Aging Rate

作　　者：王菊凤[1] 龙波[1] 黄徐瑞晗 张宇 韩锋[1] WANG Jufeng;LONG Bo;HUANG Xuruihan;ZHANG Yu;HAN Feng

机构地区：[1]贵州省计量测试院

出　　处：《计量与测试技术》2023年第8期114-116,共3页Metrology & Measurement Technique

基　　金：国家重点研发计划(课题编号:2021YFF0600102);贵州省科技计划(黔科合支撑[2019]2881号)。

摘　　要：在时间频率领域,为表征频率标准连续工作时频率随时间单方向的慢变化程度,使用最小二乘法对测量数据进行拟合,得到漂移率或老化率。根据频率标准和相邻时间间隔的不同,分别对铷原子频标日漂移率和电子测量仪器内石英晶体振荡器日老化率及其标准不确定度进行计算,从而加深对日漂移率和日老化率的思考和理解。In the field of time and frequency,in order to characterize the degree of slow change in frequency in one direction with time during continuous operation of the frequency standard,the measured data are fitted using the least squares method to obtain the drift rate.According to the difference between the frequency standard and the adjacent time interval,the daily dnift rate of rubidium atomie frequency standard and the daily aging rate of crystal oscillator inside the electrical measurement instrument and its standard uncertainty are calculated respectively,so as to deepen the thinking and understanding of daily drift rate and daily aging rate.

关 键 词：计量学 最小二乘法 日漂移率 日老化率 

分 类 号：TN752[电子电信—电路与系统]