基于晶体振荡器的高性能守时方法研究

Research on high performance timekeeping methods based on crystal oscillators

高精度的授时系统因恒温晶振的实际值和标称值存在一定的偏差,基于高精度恒温晶体振荡器对存储的脉冲数进行均值计算,模拟出高精度的脉冲信号,能够达到1 h以内的守时误差低于250 ns,能够满足授时系统的守时要求。文章针对晶体振荡器的老化参数进行拟合,通过模型对晶振守时方法进行实验,确保晶振守时能够保持在每天500 ns,以此来提升晶体振荡器的保持能力。

A high-precision timing system has a certain deviation between the actual and nominal values of the constant temperature crystal oscillator.Based on the calculation of the average number of stored pulses using a high-precision constant temperature crystal oscillator,a high-precision pulse signal is simulated,which can achieve a time keeping error of less than,and meet the time keeping requirements of the timing system.This article focuses on fitting the aging parameters of crystal oscillators and conducting experiments on the crystal oscillator timing method through a model to ensure that the crystal oscillator timing can be maintained,in order to improve the maintenance ability of the crystal oscillator.