基于频差倍增法的频率标准装置建模与分析

Modeling and analysis of frequency standard equipment based on frequency difference multiplication method

在航天测控及广电电力领域,为了保证时间和频率统一,需要对时统的铷钟及髙稳晶振等设备进行高精度频率测量。采用了一种以铯原子频率标准为参考,基于频差倍增法构建的频率标准装置,根据频差倍增法测量原理,推导了测量铷钟及髙稳晶振过程中数据影响因素的数学模型,在此基础上,通过对测量影响因素的分析及实测数据计算,对装置的测量不确定度进行了分析和评定。评定结果表明,标准装置符合铷钟及髙稳晶振的检定规程要求,能够确保测量结果准确可靠。

In the field of space tracking and control,radio and television and electricity,in order to ensure uniform time and frequency,the high-precision frequency measurement is needed for rubidium clock and high stability crystal oscillator of time unified system.The frequency standard equipment based on frequency difference multiplication method is used,in which the reference frequency is from cesium atom frequency standard.By the principle of frequency difference multiplication method,a mathematical model for the influence of the measurement on the rubidium clock and high stability crystal oscillator is proposed.On this basis,by analyzing the influential factors and calculating the test data,the evaluation of uncertainty of measurement is given.The evaluation results show that the equipment is suitable for the national metrological verification regulations of rubidium clock and high stability crystal oscillator,the measuring result with the equipment is correct and reliable.