Air bag device

Land vehicles – Wheeled – Attachment

Patent

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Details

2807302, 180274, 340436, 32420716, 32420726, B60R 2132, G01B 714

Patent

active

057070768

ABSTRACT:
An air bag device is provided which uses an eddy current position sensor. A coil of the sensor is disposed on a seat frame or the like, as a portion of a vehicle body, which is difficult to deform at the beginning of a collision. A metal body as a detected body of the sensor is disposed on a portion, facing the coil, of a rocker panel, which is a portion of the vehicle body, that is easily deformable at the beginning of a collision. The sensor may be disposed at other portions, e.g. inside a pillar or a door. An inductance of the coil influences a resonance condition of a resonance circuit. An output of the resonance circuit is rectified by a rectifier circuit. An ignition control circuit detects an output of the rectifier circuit and outputs an ignition command signal to a squib of an inflator, based upon at least one of an output value and a change rate of the output value of the rectifier circuit, thereby inflating an air bag.

REFERENCES:
patent: 4023056 (1977-05-01), Yamada et al.
patent: 4866418 (1989-09-01), Dobler et al.

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