Design And Implementation Of Time Synchronization System Based On Beidou

In recent years,China has increased its investment in localization and substitution in all aspects,and is no longer relying solely on foreign technology,which makes various domestic information technologies flourish,especially chip technology and navigation system.At the same time,with the rapid development of modern electronic systems,the requirements for the accuracy of time reference equipment are becoming higher and higher.At present,the domestic time servers are confused in terms of specification or price,and there is no unified standard.In view of this demand,it has certain engineering application value to carry out the design of time synchronization system based on Beidou by using domestic processors and Beidou navigation system.Based on the analysis of time synchronization technology and satellite navigation timing technology,this paper uses domestic processor chips to build a precision time synchronization system based on Godson 1C processor and Beidou navigation system.The system takes Beidou satellite time as the reference clock of the time service system,and has long-term stable high-precision time and frequency signals.The core processor adopts domestic Godson general high-performance microprocessor chip 1c300b,which has low power consumption and high-capacity storage expansion interface,and improves the data processing ability.Based on the transplantation of boot program and kernel of embedded Linux system,complete the application design and compilation,and deploy NTP service on the basis of transplanting embedded Linux system.Finally,plate making,welding and debugging are completed,and a time service terminal prototype is completed.The function verification and performance test of the time service terminal prototype show that the system meets the design index requirements,10MHz accuracy is better than3*10^-12/s,1PPS time deviation is less than 32ns,IRIG-B time deviation is less than 70ns,the system works continuously for 24h*30 days,the state is normal,and the time service is accurate.Because of its high degree of localization,it is worth popularizing in China.