基于晶振的高性能时间保持方法研究  

Research of high performance time keeping method based on crystal oscillator

作　　者：樊多盛 刘娅[1,2,3] 李孝辉 陈瑞琼[1,2] FAN Duo-sheng;LIU Ya;LI Xiao-hui;CHEN Rui-qiong(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;Key Laboratory of Time and Frequency Primary Standards,Chinese Academy of Sciences,Xi’an 710600,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院时间频率基准重点实验室,西安710600 [3]中国科学院大学,北京100049

出　　处：《时间频率学报》2021年第1期26-32,共7页Journal of Time and Frequency

基　　金：国家自然科学基金资助项目(U2031125,12003040);陕西省自然科学基金资助项目(2018ZDXM-GY-011)。

摘　　要：以晶振作为时钟时间源,经外部参考时间源驯服后,在参考时间源中断的情况下,通过对晶振的老化和温度补偿,实现晶振的高性能时间保持。本文采用一颗秒稳优于5×10-11的晶振作为试验对象,经过驯服后,在参考时间中断的情况下,根据历史时间偏差数据和环境温度变化量对该款晶振进行老化和温度补偿,将晶振自主保持24 h约20.05μs提高至补偿后的0.4μs。实验结果对比表明晶振经驯服后在保持状态下,利用本文提出的晶振老化和温度补偿技术,基于晶振的时间保持能力得到了明显的提升,具有一定的应用价值。Using the crystal oscillator as the clock time source,when the reference time source is interrupted,the high performance time keeping of the crystal oscillator controlled by the external reference time source is achieved by aging and temperature compensation of the crystal oscillator.In this paper,a crystal oscillator with stability better than 5×10-11/s is used as the test object.After the crystal oscillator is controlled by reference time source,compensates for the aging and temperature of the crystal oscillator are achieved based on historical time deviation data and the amount of ambient temperature change when the reference time is interrupted.Compared with the result of 20.05μs within 24 hours for the uncontrolled case,the precision of the crystal oscillator self-maintenance is better than 0.4μs within 24 hours.The comparison of the experimental results shows that after the crystal oscillator is controlled,under the holding state,through the aging and temperature compensation of the crystal proposed in this paper,its time retention ability has been significantly improved and the long-term stability of the frequency of the crystal has been improved.The research has certain application value.

关 键 词：时间保持 老化 温度补偿 压控晶振 

分 类 号：TN752[电子电信—电路与系统]