Vehicular emergency reporting device

摘要

A vehicular emergency reporting device includes a voltage step-down unit, an auxiliary power source, a voltage step-up unit, a control unit, an emergency report executing unit, and a switching unit. When a decreased voltage decreased by the voltage step-down unit is lower than an increased voltage increased by the voltage step-up unit, the emergency report executing unit performs an emergency report using the increased voltage as the operation voltage. When the decreased voltage is lower than the increased voltage, the switching unit switches a power supply mode between a first mode in which the increased voltage is supplied to the control unit and the emergency report executing unit and a second mode in which an auxiliary power source voltage is supplied to the control unit and the emergency report executing unit without being increased by the voltage step-up unit.

主权项

1. A vehicular emergency reporting device comprising:
a voltage step-down unit decreasing a main power source voltage supplied from a main power source to generate a decreased voltage; an auxiliary power source providing a backup power source of the main power source; a voltage step-up unit increasing an auxiliary power source voltage supplied from the auxiliary power source to generate an increased voltage; a control unit operating using the increased voltage as an operation voltage when the decreased voltage is lower than the increased voltage; an emergency report executing unit receiving an emergency report execution instruction from the control unit and performing an emergency report, when the decreased voltage is lower than the increased voltage, the emergency report executing unit performing the emergency report using the increased voltage as the operation voltage; and a switching unit switching a mode of supplying the operation voltage to the control unit and the emergency report executing unit between a first mode and a second mode when the decreased voltage is lower than the increased voltage, the switching unit controlling the voltage step-up unit to supply the increased voltage to the control unit and the emergency report executing unit as the operation voltage in the first mode and controlling the auxiliary power source to supply the auxiliary power source voltage to the control unit and the emergency report executing unit as the operation voltage without increasing the auxiliary power source voltage using the voltage step-up unit.