Time delay device of satellite time service

Abstract

The invention provides a time delay device of satellite time service. The device comprises a satellite time service receiving module (21), a timed update control unit (22), a time keeping unit (23), a time display unit (25) and a satellite state display unit (24), wherein the satellite time service receiving module is used for outputting time information to the timed update control unit; the timed update control unit is used for updating time of the time keeping unit at a certain period of time; the time keeping unit is used for outputting data to the time display unit every second; and the timed update control unit is used for judging a satellite judging situation simultaneously, and displaying the satellite judging situation through a satellite receiving state. In the device, the satellite time service receiving module and the time display device are combined, so that time of the time display device is periodically synchronized to a satellite, the time display device can be used for outputting accurate time, and time correction is not required permanently.

Description

technical field [0001] The invention proposes a device for obtaining and displaying time through navigation satellites, which can be applied to various occasions requiring time display, such as government agencies, national defense, schools, hospitals, transportation, finance and other departments. Background technique [0002] At present, the time display device is widely used, but because the clock of the time display device generally uses a quartz crystal oscillator as a frequency reference, there is an error in the frequency accuracy. In addition, the output frequency of the quartz crystal oscillator is also affected by the ambient temperature. Therefore, errors will occur when the clock runs for a long time, and it needs to be calibrated frequently, which brings inconvenience to people. [0003] In order to achieve calibration, people have adopted many methods, such as long-wave and short-wave, but these methods are used in a small number of fields, resulting in high co...

AI Technical Summary

Problems solved by technology

[0002] At present, the time display device is widely used, but because the clock of the time display device generally uses a quartz crystal oscillator as the frequency reference, there is an error in the frequency accuracy. In addition, the output frequency of the quartz crystal oscillator is also affected by the ambient temperature.

Therefore, the clock will generate errors when it runs for a long time, and it needs to be calibrated frequently, which brings inconvenience to people.

[0003] In order to achieve calibration, people have adopted many methods, such as long-wave and short-wave, but these methods have high cost and large size of the receiving terminal due to the small number of fields of use. In addition, the reception effect of long-wave and short-wave in cities is not good, so it is difficult to apply on a large scale

[0004] At present, with the vigorous development of the global satellite navigation system, the number of navigation satellites that can be used has increased sharply, the cost of positioning and timing terminals has been continuously reduced, and the accuracy has been continuously improved.

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