Control system for vehicle safety device
First Claim
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1. A control system for a vehicle safety device comprising:
- (a) a plurality of acceleration sensors, each of which outputs a signal representative of acceleration and deceleration of a vehicle;
(b) test pulse output means for outputting test pulses to said plurality of acceleration sensors so that when one of said plurality of acceleration sensors receives the test pulse, the other acceleration sensor does not receive the test pulse;
(c) failure judgment means for checking said signal output from the acceleration sensor which received said test pulse to judge whether or not this acceleration sensor has failed; and
(d) acceleration evaluation means for continuously calculating with the signals output from those acceleration sensors which have not received the test pulse to judge whether or not a vehicle collision has occurred, and then to output a trigger signal to a vehicle safety device which said acceleration evaluation means judges that the collision has occurred.
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Abstract
A vehicle safety device control system includes a plurality of acceleration sensors. Test pulses are supplied to the plurality of acceleration sensors. In order to judge whether or not each acceleration sensor has failed each acceleration sensor is checked for whether or not it outputs a signal that corresponds to the test pulse. The signal from the failed acceleration sensor is not used when a determining if a collision has occurred; only the signals from the other acceleration sensors are used in this determination.
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Citations
4 Claims
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1. A control system for a vehicle safety device comprising:
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(a) a plurality of acceleration sensors, each of which outputs a signal representative of acceleration and deceleration of a vehicle; (b) test pulse output means for outputting test pulses to said plurality of acceleration sensors so that when one of said plurality of acceleration sensors receives the test pulse, the other acceleration sensor does not receive the test pulse; (c) failure judgment means for checking said signal output from the acceleration sensor which received said test pulse to judge whether or not this acceleration sensor has failed; and (d) acceleration evaluation means for continuously calculating with the signals output from those acceleration sensors which have not received the test pulse to judge whether or not a vehicle collision has occurred, and then to output a trigger signal to a vehicle safety device which said acceleration evaluation means judges that the collision has occurred. - View Dependent Claims (2, 3, 4)
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Specification