LOW POWER CONSUMPTION CONTROL METHOD FOR SATELLITE TIME SERVICE CLOCK SYSTEM, AND CLOCK SYSTEM

摘要

A low power consumption control method for a satellite time service clock system, and a clock system. The method comprises the following steps: (1) the clock system compensates for a travel time frequency according to a preset crystal frequency/temperature function relationship to compensate for the time difference of a clock caused by the temperature change, to improve the travel time accuracy; (2) a satellite receiving module (20) receives and decodes to obtain the satellite standard time; (3) synchronize the clock time according to the satellite standard time, measure the time difference between the clock time and the satellite standard time, and calculate the frequency accuracy of the clock crystal; (4) correct the preset crystal frequency/temperature function relationship according to the frequency accuracy of the crystal to compensate for the frequency aging of the travel time crystal so as to keep travel time accuracy; (5) adjust the receiving cycle of the satellite standard time according to the frequency accuracy of the crystal. The system can reduce the time and frequency of receiving a satellite signal as much as possible, reduce the power consumption of the clock system, and keep the clock with high-precision travel time.