Judgment line calculations for a vehicle safety system
First Claim
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1. A method for determining a warning for a vehicle safety system using a controller comprising:
- initiating the safety system with at least one input;
comparing via the controller a vehicle acceleration and an object acceleration and selecting from a set of predetermined equations based upon the compared accelerations;
calculating via the controller an amount of time to perform each of braking and steering to avoid contact with the object using the selected predetermined equations;
determining a distance between the vehicle and the object at which a warning must be conveyed to the vehicle operator, at least partially based upon the shorter one of the calculated amount of time of braking and steering; and
warning a vehicle operator based upon the determined distance to perform the one of braking and steering.
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Accused Products
Abstract
A vehicle has a safety system including at least one object sensor to detect a distance from an object in a path of the vehicle and the speed and acceleration of the object. The sensor data is input into a control to determine a desired braking judgment line and a steering judgment line between the vehicle and the object. The safety system then compares the vehicle and object acceleration. Following, the safety system calculates a judgment line between the object and the vehicle based upon equations for the determined scenario. The judgment line is then used to determine a warning distance and warn a vehicle operator.
12 Citations
16 Claims
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1. A method for determining a warning for a vehicle safety system using a controller comprising:
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initiating the safety system with at least one input; comparing via the controller a vehicle acceleration and an object acceleration and selecting from a set of predetermined equations based upon the compared accelerations; calculating via the controller an amount of time to perform each of braking and steering to avoid contact with the object using the selected predetermined equations; determining a distance between the vehicle and the object at which a warning must be conveyed to the vehicle operator, at least partially based upon the shorter one of the calculated amount of time of braking and steering; and warning a vehicle operator based upon the determined distance to perform the one of braking and steering. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for determining a warning for a vehicle safety system using a controller comprising:
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initiating the safety system with at least one input; comparing via the controller a vehicle acceleration and an object acceleration and selecting from a set of predetermined equations based upon the compared accelerations; calculating via the controller an amount of time to perform at least one of braking and steering to avoid contact with the object using the selected predetermined equations; determining a distance between the vehicle and the object at which a warning must be conveyed to the vehicle operator, at least partially based upon the calculated amount of time; warning a vehicle operator to perform the one of braking and steering; and wherein the set of predetermined equations include equations based on;
the vehicle velocity being constant and the object velocity being constant;
the vehicle velocity being constant and the object velocity being not constant;
the vehicle velocity being not constant and the object velocity being constant; and
the vehicle velocity being not constant and the object velocity being not constant.
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8. A method for determining a warning for a vehicle safety system using a controller comprising:
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initiating the safety system with at least one input; comparing via the controller a vehicle acceleration and an object acceleration and selecting from a set of predetermined equations for an applicable safety system scenario based upon the compared accelerations; calculating via the controller a first amount of time until contact between the object and the vehicle based upon equations for the determined applicable safety system scenario; calculating via the controller a second amount of time until contact between the object and the vehicle based upon equations for the determined applicable safety system scenario; determining a warning distance based upon the calculated first and second amounts of time; and warning a vehicle operator based upon the determined warning distance. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification