Method and system for determining a primary direction of force resulting from a vehicle collision
First Claim
1. A method carried out in a crash direction computing module on a vehicle, comprising the steps of:
- sampling acceleration information, from accelerometers on the vehicle, resulting from a vehicle collision event, the acceleration information includes a first direction acceleration value and a second direction acceleration value;
determining, in the crash direction computing module, a first delta velocity threshold value using equations for a circle and a second direction delta velocity value;
determining, in the crash direction computing module, a latch threshold value using accumulated acceleration information and equations of a circle that define a latch circle radius but do not include the second direction delta velocity value;
creating a vector representative of a magnitude and direction of the vehicle collision event, the vector is created from the accumulated acceleration information when the latch threshold value is met; and
outputting the vector to a control module of a system on the vehicle to perform an operation in one or more vehicle systems consisting of a restraint control system, a brake system, a stability control system, a steering system, and a fuel supply system.
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Accused Products
Abstract
A vehicle comprises an acceleration sensing module and a crash direction-computing module. The acceleration-sensing module is configured for generating acceleration information resulting from a vehicle collision event. The acceleration information includes a first direction acceleration value and a second direction acceleration value. The crash direction-computing module is coupled to the acceleration-sensing module for receiving the acceleration information therefrom and is configured for determining impact direction information resulting from the vehicle collision event. Generating the impact direction information includes deriving a first direction delta velocity value from the first direction acceleration value, deriving a second direction delta velocity value from the second direction acceleration value, determining a first delta velocity threshold value based on a delta velocity threshold angle and the first direction delta velocity value, and determining an impact zone based on the first delta velocity threshold value and the second direction delta velocity value.
30 Citations
24 Claims
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1. A method carried out in a crash direction computing module on a vehicle, comprising the steps of:
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sampling acceleration information, from accelerometers on the vehicle, resulting from a vehicle collision event, the acceleration information includes a first direction acceleration value and a second direction acceleration value; determining, in the crash direction computing module, a first delta velocity threshold value using equations for a circle and a second direction delta velocity value; determining, in the crash direction computing module, a latch threshold value using accumulated acceleration information and equations of a circle that define a latch circle radius but do not include the second direction delta velocity value; creating a vector representative of a magnitude and direction of the vehicle collision event, the vector is created from the accumulated acceleration information when the latch threshold value is met; and outputting the vector to a control module of a system on the vehicle to perform an operation in one or more vehicle systems consisting of a restraint control system, a brake system, a stability control system, a steering system, and a fuel supply system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vehicle system for determining an impact force direction and magnitude, comprising:
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an acceleration sensing module generating acceleration information resulting from a vehicle collision event, wherein the acceleration information includes a first direction acceleration value and a second direction acceleration value; a crash direction computing module coupled to the acceleration sensing module, receiving, sampling and accumulating the acceleration information therefrom and configured to determine impact magnitude and direction information resulting from the vehicle collision event, including deriving a first direction delta velocity value from the first direction acceleration value, deriving a second direction delta velocity value from the second direction acceleration value, determining a latch threshold value using equations for a circle that define a latch circle radius, a first delta velocity threshold value based on a delta velocity threshold angle and the first direction delta velocity value, the crash direction computing module creating a vector from the accumulated acceleration information when the latch threshold value has been met, the vector being representative of a magnitude and a direction of the vehicle collision event including a primary force of impact direction, and the crash direction computing module outputting the vector to a control module of a vehicle system to perform an operation in one or more vehicle systems consisting of a restraint control system, a brake system, a stability control system, a steering system, and a fuel supply system. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An electronic controller system on a vehicle to carry out operations for:
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acquiring acceleration information resulting from a vehicle collision event, the acceleration information includes a first direction acceleration value and a second direction acceleration value, the first direction acceleration value corresponds to a direction extending substantially perpendicular to a direction corresponding to the second direction acceleration value; determining a first direction delta velocity value based on the first direction acceleration value; determining a second direction delta velocity value based on the second direction acceleration value; determining a first delta velocity threshold value using equations for a circle and based on a first delta velocity threshold angle and the first direction delta velocity value; determining a latch threshold value using accumulated acceleration information and equations of a circle to define a latch circle radius; creating a vector representative of a magnitude and direction of the vehicle collision event, the vector being created from the accumulated acceleration information when the latch threshold value is met; and outputting the vector to a control module of a system on the vehicle; determining an impact zone of the vehicle at which an impact from the vehicle collision event has occurred, wherein the impact zone is determined based on the vector output; and performing an operation, in one or more vehicle systems, in response to the impact zone determination, the one or more vehicle systems consisting of a restraint control system, a brake system, a stability control system, a steering system, and a fuel supply system. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification