Low power consumption control method and clock system of satellite time service clock system

Abstract

The present invention relates to a low power consumption control method and clock system of a satellite time service clock system. The method comprises the following steps: (1) the clock system compensates the travel time power according to the preset crystal frequency / temperature function relationship to compensate the time difference caused by the temperature change of the clock, thereby improving the travel time accuracy; (2) the satellite receiving module receives and decodes the obtained satellite standard time; (3) according to the satellite standard time, the clock time is synchronized, the time difference between the time clock and the satellite standard time is measured, and the frequency accuracy of the clock crystal is calculated; (4) according to the frequency accuracy of the crystal, the preset crystal frequency / temperature function relationship is corrected, to compensate for the aging frequency of the crystal to keep travel time accuracy; (5) according to the frequency accuracy of the crystal, the cycle of receiving the satellite standard time is adjusted. The invention can reduce the time and frequency of receiving the satellite signal as much as possible, reduce the power consumption of the clock system, and keep the clock with high-precision travel time.

Description

technical field [0001] The invention relates to the technical field of satellite clocks, in particular to a method for controlling low power consumption of a satellite timing clock system and a clock system. Background technique [0002] At present, electronic clocks mainly use quartz crystals to provide travel time frequency signals. Due to the inherent frequency / temperature characteristics of the crystal, its oscillation frequency changes with the change of the ambient temperature; at the same time, the crystal also has frequency aging characteristics, and its frequency accuracy changes with the use time during use. Therefore, in the non-constant temperature environment of normal use, the frequency output of the quartz crystal is unstable, and the clock will continue to accumulate travel time errors, resulting in an increasing error between the clock time and the standard time, affecting the travel time accuracy of the clock. There will be an accumulated error of tens of ...

AI Technical Summary

Problems solved by technology

Therefore, in the non-constant temperature environment of normal use, the frequency output of the quartz crystal is unstable, and the clock will continue to accumulate travel time errors, resulting in an increasing error between the clock time and the standard time, affecting the travel time accuracy of the clock. There will be an accumulated error of tens of seconds

When the error of the clock travel time is large, the user needs to manually adjust the time, which is extremely inconvenient to use

With the continuous improvement of people's requirements for clock accuracy, the travel time error of tens of seconds per month can no longer meet people's requirements for time accuracy

[0003] Existing satellite clocks can synchronize time by frequently receiving satellite timing signals to maintain time accuracy, but the receiving process consumes a lot of power

For the convenience of use, the clock is generally powered by alkaline dry batteries, and its power is relatively limited. Frequent reception of signals will affect the service life of the clock battery. Widespread promotion of satellite clocks

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