Device for side impact detection in a motor vehicle
AssigneeRobert Bosch GmbH
InventorsMichael Roelleke, Pascal Kocher, Rolf-Juergen Recknagel, Rolf Aidam
Life of this patent
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Abstract
A device for side impact detection in a motor vehicle, and a plausibility sensor side impact detection. This plausibility sensor is located in a loudspeaker which is already present in the lateral part for playback of music. This loudspeaker is used as a low-frequency microphone, a circuit being provided for the loudspeaker to differentiate between sound and rapid fluctuations in air pressure. This circuit has a bridge circuit, the differential voltage across the bridge then being used as a plausibility signal. The circuit itself is preferably located in the door.
Claims3
A device for side impact detection in a motor vehicle, the vehicle having a control device for restraint devices, the device comprising:
- at least one sensor for side impact detection;
- means for checking a plausibility of a signal of the at least one sensor, the means for checking including a loudspeaker situated in a lateral part of the vehicle;
- and
- a circuit for differentiating between sound and rapid fluctuations in air pressure adapted to be connected to the loudspeaker and to the control device.
Dependencies are inferred from the claim text.