Method and device for deploying a retaining system
AssigneeRobert Bosch GmbH
InventorsBernhard Mattes, Jörg Heckel, Arno Schaumann, Michael Henne, Peter Meissner
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Abstract
A method and a device for deploying a restraint system, which avoids false deployments at the least possible expense by using an acceleration sensor arrangement that includes two sensitivity axes oriented in different directions. An acceleration measured with respect to one of the two sensitivity axes is used for a plausibility check of a deployment decision, which is determined from an acceleration measured with respect to the other sensitivity axis. A trigger signal is only generated if a deployment decision signal and a plausibility signal are present at the inputs of an AND logic circuit at the same time.
Claims7
A method for deploying a restraint system in response to an impact of a motor vehicle against an obstacle, the motor vehicle including an acceleration sensor arrangement having two sensitivity axes, one arranged in the X-direction, and one in the Y-direction, with the X-direction describing the direction of travel, and the Y direction describing the vehicle transverse direction, the method comprising the steps of:
- generating a trigger signal for the restraint system from measured
- accelerations using an evaluation circuit;
- using a measured acceleration with respect to one of the two sensitivity axes for a plausibility check of a deployment decision;
- determining the deployment decision as a function of a measured acceleration with respect to the other of the two sensitivity axes using the evaluation circuit;
- and
- emitting the trigger signal only if a deployment decision signal and a plausibility signal are present simultaneously at inputs of an AND logic circuit.
A device for deploying a restraint system in response to an impact of a motor vehicle against an obstacle, comprising:
- an acceleration sensor arrangement having two sensitivity axes, one arranged in the X-direction, and one in the Y-direction, with the X-direction describing the direction of travel, and the Y direction describing the vehicle transverse direction;
- an evaluation circuit, the evaluation circuit generating a trigger signal for the restraint system as a function of measured accelerations, the evaluation circuit including an arrangement for performing a plausibility check of a deployment decision as a function of a measured acceleration with respect to one of the two sensitivity axes, the evaluation circuit determining the deployment decision as a function of a measured acceleration with respect to the other of the two sensitivity axes;
- and
- an AND logic circuit emitting the trigger signal if a deployment decision signal and a plausibility signal are present at inputs of the AND logic circuit at the same time.
Dependencies are inferred from the claim text.