Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Patent
1995-07-12
1998-09-15
Teska, Kevin J.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
701 46, 180282, 280735, 307 101, B60R 2132
Patent
active
058094393
ABSTRACT:
A triggering device for a vehicle safety device is provided with an acceleration sensor generating signals corresponding to a measured acceleration and a circuit processing the signals for generating a triggering signal when a predetermined threshold value for a vehicle collision is exceeded. To manufacture a triggering device of high security and reliability in an economical manner, the acceleration signals measured by the acceleration sensor are supplied to a threshold circuit having at least two threshold values for a specific vehicle. The threshold circuit activates a counter with a weighting factor that is increased from the first threshold value to the next threshold value. The counter adds received clock pulses to the given weighting factor and at each clock pulse is decremented by a count the weighting factor of which is below that of the first threshold value. The count of the counter is compared with a triggering threshold value, and when said triggering threshold value is reached, the triggering signal is produced. The counter is reset when the count of the counter becomes negative.
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Autoliv Development AB
Teska Kevin J.
Walker Tyrone V.
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