Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1989-11-03
1991-06-04
Scott, J. R.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
280734, 340436, 340669, B60R 2132
Patent
active
050216783
ABSTRACT:
Apparatus and method are provided for actuating a passenger restraint system in a passenger vehicle. A sensor, such as an accelerometer, provides a vehicle condition signal indicative of a potential deployment condition suitable for actuating the restraint system. A first signal is provided so long as the value of the condition signal exceeds that of a first threshold level. An integrator is operative in response to the first signal for integrating the condition signal and providing an integrated signal. The integrator is normally operative to be reset upon termination of the first signal. A trigger signal is provided for actuating the restraint system when the value of the integrated signal exceeds that of a second threshold level. The integrator is prevented from being reset upon termination of the first signal once the first signal has had a time duration of at least time period T1. The integrator is reset after a time period T2 has taken place, wherein T2 had a duration greater than that of time period T1. Consequently, the integrator continues to integrate the condition signal during the interval between the termination of time period T1 and the termination of time period T2, even though the value of the condition signal drops below that of the first threshold level during the interval.
REFERENCES:
patent: 3870894 (1975-03-01), Brede et al.
patent: 3911391 (1975-10-01), Held et al.
patent: 4614876 (1986-09-01), Mattes et al.
patent: 4723078 (1988-02-01), Neuffer et al.
patent: 4851705 (1989-07-01), Mosser et al.
Gaffin Jeffrey A.
Scott J. R.
TRW Technar Inc.
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