CPC H04J 3/065 (2013.01) [G01S 19/14 (2013.01); G01S 19/256 (2013.01); G01S 19/37 (2013.01); G04R 20/04 (2013.01)] | 20 Claims |
1. An on-board synchronization device, comprising a first circuit and at least one second circuit, wherein
the first circuit is configured to receive an initial signal containing Universal Time Coordinated (UTC), generate a first signal containing the UTC, and output the first signal to at least one on-board device, such that the at least one on-board device synchronizes its built-in clock with the UTC based on the first signal, and
the second circuit is configured to receive a Pulse Per Second (PPS) signal, generate a periodic second signal with a same phase as the PPS signal, and output the second signal or the PPS signal to the at least one on-board device, such that the at least one on-board device performs a predetermined action based on the second signal or the PPS signal,
wherein the second circuit comprises a second signal generating and processing module, and a pulse signal one-out-of-two selection module,
wherein the second signal generating and processing module is configured to generate a second signal based on the PPS signal, generate a signal source switching control signal, and output the second signal and the signal source switching control signal to the pulse signal one-out-of-two selection module, and
wherein the pulse signal one-out-of-two selection module is configured to output the PPS signal or the second signal in accordance with the signal source switching control signal.
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