System and method for actuating vehicle safety device using damped measures
First Claim
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1. A system for actuating a vehicle safety device in the event of a vehicle crash or sudden vehicle deceleration comprises:
- means for generating sampled data representative of the instantaneous acceleration of said vehicle;
a RAM for storing consecutive values of said acceleration data;
means for calculating a low-variance jerk value from said stored data set;
means for calculating a high-variance jerk value from said stored data set;
means for calculating at least one modified velocity value from said stored data set;
means for calculating a predicted acceleration value using said low-variance jerk value;
means for calculating a high-frequency velocity value using said low-variance jerk value;
means for calculating a high-variance velocity value using said high-variance jerk value; and
means responsive to said values for modified velocity, predicted acceleration, high-frequency velocity, and high-variance velocity for actuating said vehicle safety device when at least two of said values exceed threshold values therefor.
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Abstract
A system and method for triggering deployment of a vehicle air bag in response to a crash or sudden vehicle deceleration responsive to values for modified velocity, predicted acceleration, high-frequency velocity, and high-variance velocity. The air bag is triggered when at least two of the values for modified velocity, predicted acceleration, high-frequency velocity, and high-variance velocity exceed their respective thresholds.
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Citations
31 Claims
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1. A system for actuating a vehicle safety device in the event of a vehicle crash or sudden vehicle deceleration comprises:
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means for generating sampled data representative of the instantaneous acceleration of said vehicle; a RAM for storing consecutive values of said acceleration data; means for calculating a low-variance jerk value from said stored data set; means for calculating a high-variance jerk value from said stored data set; means for calculating at least one modified velocity value from said stored data set; means for calculating a predicted acceleration value using said low-variance jerk value; means for calculating a high-frequency velocity value using said low-variance jerk value; means for calculating a high-variance velocity value using said high-variance jerk value; and means responsive to said values for modified velocity, predicted acceleration, high-frequency velocity, and high-variance velocity for actuating said vehicle safety device when at least two of said values exceed threshold values therefor.
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2. A method for actuating a vehicle safety device in the event of a vehicle crash or sudden vehicle deceleration comprising the steps of:
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receiving information representative of instantaneous vehicle acceleration; storing said received acceleration information in a RAM; generating a low-variance jerk value from said stored acceleration information; generating a high-variance jerk value from said stored acceleration information; generating a first velocity value and a second velocity value using said stored acceleration information; generating a predicted acceleration value using said low-variance jerk value; generating a high-frequency past history value using said low-variance jerk value; generating a high-variance past history value using said high-variance jerk value; and actuating said vehicle safety device if, while said first velocity value exceeds a first threshold value, said predicted acceleration value has exceeded a second threshold value and said high-variance velocity value has exceeded a second threshold value; and
while said second velocity value exceeds a fourth threshold value, said predicted acceleration value has exceeded a fifth threshold value and said high-frequency past history measure has exceeded a sixth threshold value. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for controlling actuation of a vehicle safety device in an event of a vehicle crash or sudden vehicle deceleration comprising:
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means for receiving information representative of instantaneous vehicle acceleration; means for storing said received acceleration information; means for generating a low-variance jerk value from said stored acceleration information; means for generating a high-variance jerk value from said stored acceleration information; means for generating a first velocity value and a second velocity value using said stored acceleration information; means for generating a predicted acceleration value using said low-variance jerk value; means for generating a high-frequency past history value using said low-variance jerk value; means for generating a high-variance past history value using said high-variance jerk value; and means for actuating said vehicle safety device if, while said first velocity value exceeds a first threshold value, said predicted acceleration value has exceeded a second threshold value and said high-variance velocity value has exceeded a second threshold value; and
, while said second velocity value exceeds a fourth threshold value, said predicted acceleration value has exceeded a fifth threshold value and said high-frequency past history measure has exceeded a sixth threshold value. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification