| 摘要 |
The invention relates to a method (600) for ascertaining an inner resistance (R) of a supply network (100) for supplying energy to a personal protection device (130) of a vehicle (105). The personal protection device (130) includes a charging unit (110) which is connected to the supply network (100) by means of a primary interface (135) and to an intermediate energy storage (ER, 120) by means of a secondary interface (140) for the intermediate storage of energy in order to activate personal protection means (130) of the personal protection device (130) and for supplying the personal protection device (130) after being separated from the supply network (100). The method (600) has a step of imprinting (610) a first charge current value (IER(t1)) at the secondary interface (140) and a step of detecting (620) a first current and/or a first voltage at the primary interface (135) during the imprinting step (610). The method (600) further has a step of imprinting (630) a second charge current value (IER(t5)), which differs from the first charge current value (IER(t1)), at the secondary interface (140). The method (600) additionally has a step of determining (640) a second current and/or a second voltage at the primary interface (135) during the imprinting step and a step of ascertaining (650) the inner resistance (R) of the supply network (100) using the detected first current and the second current and/or using the first voltage and the second voltage. |
