Pulsar time synchronous device with high reliability

Abstract

The invention discloses a pulsar time synchronous device with high reliability, which includes an x-ray detector, a signal conditioner, a first rubidium atomic clock, a second rubidium atomic clock, a third rubidium atomic clock, a failure diagnosis module, a change-over switch, frequency dividers, time interval measurement modules and a CPU, wherein the first, the second and the third rubidium atomic clocks are connected with the failure diagnosis module, and are connected with the change-over switch respectively; the failure diagnosis module includes the frequency dividers in three groups and the time interval measurement modules, and is connected with the CPU; one way of the change-over switch is connected with the frequency dividers, and the other way of the change-over switch serves as the frequency standard of other spaceborne equipment; each frequency divider is connected one input end of each time interval measurement module; the x-ray detector is connected with the signal conditioner; the signal conditioner is connected with the other input end of each time interval measurement module; the time interval measurement modules are connected to the CPU; and the CPU is connected with the change-over switch as well as the first, the second and the third rubidium atomic clocks. The device has the advantages of high accuracy and reliability, is endowed with the failure autodiagnosis function, and greatly improves the automatic navigation capability.

Description

Technical field [0001] The invention belongs to the technical field of time synchronization, and relates to a time synchronization device, in particular a high-reliability pulsar time synchronization device. Background technique [0002] A pulsar is a neutron star that rotates at a high speed. Its rotation period is stable, and it is not damaged by human interference. It is a natural time reference source. Pulsars are far away from the solar system and have good visibility and wide coverage. They are used for various low-Earth orbits, mid-high orbits and deep space exploration orbits. [0003] During the mission of autonomous navigation satellites, the on-board atomic clock will drift in frequency with time. High-precision time and frequency signals are the prerequisite for high-precision orbit determination. Therefore, high-precision time synchronization devices are important for autonomous navigation satellites. Has a very important role. [0004] At present, the time synchroniza...

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Problems solved by technology

[0004] At present, the time synchronization technology based on X-ray pulsars is still in its infancy, and there is no mature technical solution in China. Aiming at this problem, the present invention designs a time synchronization device based on pulsars. The periodic pulse signal detected by the detector corrects the space-borne rubidium atom, so that the space-borne atomic clock maintains a high accuracy

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