Collision determining device
First Claim
1. A collision determining device for activating an occupant protection device mounted in a vehicle, comprising:
- a sidewall acceleration sensor disposed in at least one of both sidewalls of the vehicle for detecting as an acceleration a collision of an obstruction with the at least one of the both sidewalls;
a center acceleration sensor disposed in a central portion of a body of the vehicle for detecting as an acceleration a collision of an obstruction with the at least one of the both sidewalls; and
a collision determining unit for determining a collision occurrence of a given pattern requiring activating the occupant protection device, wherein a correlational map is produced to have, along with a collision determining threshold line, two parameters of a first collision estimating amount derived from an acceleration detected by the sidewall acceleration sensor and a second collision estimating amount derived from an acceleration detected by the center acceleration sensor, and wherein the collision determining unit determines the collision occurrence of the given pattern requiring activation of the occupant protection device when a tracking line that indicates a correlation between the first collision estimating amount and the second collision estimating amount crosses the collision determining threshold line from a side containing an original point of the correlational map to another side.
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Accused Products
Abstract
Satellite sensors are disposed in both sidewalls of a vehicle; each of the satellite sensors detects as an acceleration a collision of an obstruction with the corresponding sidewall. A floor G sensor is disposed in a central portion of the vehicle for detecting as an acceleration a collision of an obstruction with either of both the sidewalls. A two-dimensional correlational map is produced to have two parameters of an acceleration detected by the satellite sensor and speed variation derived from an acceleration detected by the floor G sensor. A collision determining threshold line is set on the correlational map. When a tracking line crosses the threshold line from the side containing the original point to the other side, a collision occurrence of a given pattern requiring activation of an occupant protection device is determined.
16 Citations
9 Claims
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1. A collision determining device for activating an occupant protection device mounted in a vehicle, comprising:
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a sidewall acceleration sensor disposed in at least one of both sidewalls of the vehicle for detecting as an acceleration a collision of an obstruction with the at least one of the both sidewalls;
a center acceleration sensor disposed in a central portion of a body of the vehicle for detecting as an acceleration a collision of an obstruction with the at least one of the both sidewalls; and
a collision determining unit for determining a collision occurrence of a given pattern requiring activating the occupant protection device, wherein a correlational map is produced to have, along with a collision determining threshold line, two parameters of a first collision estimating amount derived from an acceleration detected by the sidewall acceleration sensor and a second collision estimating amount derived from an acceleration detected by the center acceleration sensor, and wherein the collision determining unit determines the collision occurrence of the given pattern requiring activation of the occupant protection device when a tracking line that indicates a correlation between the first collision estimating amount and the second collision estimating amount crosses the collision determining threshold line from a side containing an original point of the correlational map to another side. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A collision determining device for activating an occupant protection device mounted in a vehicle, comprising:
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a sidewall acceleration sensor disposed in at least one of both sidewalls of the vehicle for detecting as an acceleration a collision of an obstruction with the at least one of the both sidewalls;
a center acceleration sensor disposed in a central portion of a body of the vehicle for detecting as an acceleration a collision of an obstruction with either of the both sidewalls;
an intrusion amount determining unit for determining an intrusion amount derived from a collision in the vehicle based on a first intrusion estimating amount derived from an acceleration detected by the sidewall acceleration sensor and a second intrusion estimating amount derived from an acceleration detected by the center acceleration sensor; and
a collision determining unit for determining a collision occurrence of a given pattern requiring activating the occupant protection device based on a first collision estimating amount derived from an acceleration detected by the sidewall acceleration sensor, a second collision estimating amount derived from an acceleration detected by the center acceleration sensor, and a result of the intrusion amount determined by the intrusion amount determining unit. - View Dependent Claims (8, 9)
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Specification