Synchronization device and synchronization method between main clock and standby clock

Abstract

The invention discloses a synchronization device and a synchronization method between a main clock and a standby clock, the device comprises a working clock, a time interval counter, a data processing and control unit, a phase fine tuning instrument and a standby clock which are connected in sequence, the time interval counter is also connected with the phase fine tuning instrument, and the data processing and control unit is connected with the standby clock. The method comprises the following steps: measuring a clock difference between 1PPS output after a signal of a backup clock passes through a phase fine tuning instrument and 1PPS of a working clock through a time interval counter to obtain a phase deviation delta T of the backup clock relative to the working clock, and calculating a frequency compensation amount delta P added to the backup clock; and the compensation amount is fed back to the phase fine tuning instrument to perform frequency control on the backup clock, so that high-precision frequency and phase synchronization between the working clock and the backup clock is realized. The synchronization device is low in cost and high in synchronization precision, the method is high in practicability, high-precision frequency and phase synchronization between the main clock and the standby clock can be achieved, and the long-term frequency stability of the standby clock is improved while the phase synchronization precision between the main clock and the standby clock is guaranteed.

Description

technical field [0001] The invention relates to a time-frequency synchronization technology, in particular to a synchronization device and a synchronization method between master clocks and backup clocks. Background technique [0002] As one of the seven basic units in the current International System of Units, time is the basic unit with the longest history, the most complicated situation, and the highest measurement accuracy in its definition and measurement. Time measurement permeates all fields of human activities, scientific experiments, and national construction. All kinds of timers, computers, data transmission, telephone and fax, etc., are inseparable from a stable clock frequency. The efficiency and quality of communication, telecommunications, positioning, navigation, surveying and mapping, energy, etc. largely depend on high-precision time-frequency services. With the development of my country's national economy, national defense construction and space technology...

AI Technical Summary

Problems solved by technology

[0003] The time-frequency reference station has high requirements on the reliability of time synchronization. In addition to the working clock, it is also equipped with a backup clock. The working clock and the backup clock need to maintain high-precision frequency and phase synchronization. The current common practice is to All clocks use hydrogen atomic clocks with less noise or cesium atomic clocks with better long-term stability, but hydrogen atomic clocks and cesium atomic clocks are bulky and expensive

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