Airbag device for a vehicle, especially a motor vehicle, and sensor for local and/or time resolution force or pressure measurement

Abstract

An airbag device for a vehicle includes an airbag and a sensor element located on the side of the airbag which moves towards the vehicle occupant. The sensor element is formed of sensor strips which transmit sensed pressure changes in the form of a sensor signal to a control device. The amount of gas supplied by a filling device can be controlled in response to the sensor signal. The sensor element has resistor elements forming a matrix-type grid of spaced apart contact regions of the resistor elements. An electric resistance in a contact region of two resistor elements is dependent on the force or pressure load of the contact region. A voltage can be applied to least one of the resistor elements at least in one of the contact regions via an electrically conductive element which is in electrical contact with a resistor element at the contact region.

Description

technical field [0001] The invention relates to an airbag arrangement for a vehicle, in particular a motor vehicle, according to the preamble of claim 1 and a sensor for measuring position-resolved and / or time-resolved force or pressure according to the preamble of claim 18 . Background technique [0002] Demands on airbag devices for vehicles are becoming higher and higher. Simple airbag inflation or airbag deployment no longer meets people's needs. Therefore, especially for the so-called improperly seated state in which the passenger's sitting posture is abnormal, it is desirable that the airbag at that time is not fully inflated, but inflated with a reduced gas volume. [0003] For this purpose, it is already known to provide a control mechanism on the airbag arrangement, by means of which controllable inflation of the airbag can be achieved. Such an airbag arrangement is known, for example, from EP0812741, in which a thread or a strap is fixed to the front of the airba...

AI Technical Summary

Problems solved by technology

Although the measurement error caused by this is small and the measurement accuracy is high enough for most applications, it may be necessary to use such a sensor for measurements in which, for example, a higher measurement accuracy is required in connection with airbags and such a high The measurement accuracy is not achieved in the case of carbon fiber or polymer fiber as the conductive connection between the connecting wire and the contact point of the analytical calculation circuit

Furthermore, the use of highly conductive wires as fibers in rows and columns is prohibited for the reason that such wires are liable to break or possibly crack when the sensor is deformed and are therefore prone to failure and are also prone to oxidation, wherein at the contact points Oxidation on the

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