Time-keeping method of time synchronization device

Abstract

The invention discloses a time-keeping method of a time synchronization device. The method comprises the following steps: A, receiving a first pulse per second signal; B, acquiring output signal frequency doubled by a constant-temperature crystal oscillator so as to obtain internal working frequency; C, taking the first pulse per second signal as a base, and adopting a PID (Proportion Integration Differentiation) algorithm to adjust the internal working frequency; and D, generating a second pulse per second signal synchronous to the first pulse per second signal according to the adjusted internal working frequency. According to the time-keeping method of the time synchronization device, the PID algorithm is introduced, a PID strategy is applied to adjust the internal working frequency, the second pulse per second signal is generated according to the adjusted internal working frequency and has the advantages of good stability and high synchronism, the implementation procedure of the second pulse per second signal is simple, and high-accurate time keeping can be implemented with lower cost. The invention relates to the time-keeping method of the time synchronization device, which can be widely applied to the technical field of communication.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a timekeeping method for a time synchronization device. Background technique [0002] Time and frequency are closely related to human life and play an important role in the construction and development of the national economy. Each country has established its own time reference (standard time) and time-keeping agencies to issue or deliver accurate time to users. This process of delivering accurate time is called time service. [0003] Enterprises such as electric power and communications need to use time synchronization technology based on satellite positioning systems (Beidou and GPS systems). The time source of the satellite time synchronization device depends on the satellite positioning system, but environmental factors such as weather may cause time signal deviation and short-term interruption of the satellite signal, which seriously affects the timing accuracy of the...

AI Technical Summary

Problems solved by technology

But the higher the clock stability, the higher the cost: the atomic clock frequency is stable, but the price is higher; the constant temperature crystal oscillator is cheaper, but the stability is lower (factors affecting the constant temperature crystal oscillator mainly include ambient temperature and operating voltage)

[0004] To sum up, the existing time synchronization device has a high cost to achieve high-precision punctuality, and cannot achieve high-precision punctuality at low cost.

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