| 摘要 |
A power control system and method receives and filters a valid GPS signal received by a navigation device and outputs a corresponding performance parameter for the GPS signal, and upon determining that a power management signal is a power-off management signal, determines whether the performance parameter exceeds a predetermined first threshold. If the performance parameter exceeds the predetermined first threshold, a processing module is managed to send a GPS power-on signal that allows power to be provided to a GPS module in the navigation device. Alternatively, if the power management signal is not a power-off management signal, the performance parameter is determined whether it is smaller than a predetermined second threshold value. If the performance parameter is smaller, the processing module is managed to send sends a GPS power-off signal that allows the power provided to the GPS module to be cut off, thereby reducing power consumption of the navigation device.
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