INTERSECTION COLLISION AVOIDANCE WITH ADAPTABLE VEHICLE DIMENSIONS
First Claim
1. A method for avoiding collision between a host vehicle and a target vehicle, the method comprising:
- locating current positions of the host vehicle and the target vehicle and defining a potential collision zone;
assuming target and host vehicle lengths,determining whether the assumed vehicle lengths are incorrect, and if incorrect, adjusting the assumed lengths;
checking whether the target vehicle currently intercepts the host vehicle'"'"'s path, taking into consideration the adjusted assumed lengths of the vehicles;
predicting host vehicle'"'"'s position at the instant when the target vehicle is expected to reach the potential collision zone;
calculating a host vehicle speed change value required by the host vehicle to avoid a collision with the target vehicle, based on the adjusted assumed lengths; and
providing signals to the host vehicle to effect the host vehicle speed change.
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Abstract
A method for avoiding a collision between a host vehicle and a target vehicle defines the intersection of their trajectories as the potential collision zone. The method calculates the distance to be traversed and the time required for the target vehicle to reach the collision zone and to clear it. The method then incorporates the possible cases when the target vehicle may be towing a trailer, and uses an adjusted value for the length of the target vehicle for further calculations in such cases. Further, the deceleration required by the host vehicle to allow the target vehicle to pass safely under a ‘brake to pass’ condition is calculated. The method then evaluates a break threat number based on this deceleration value and provides warning signals to the occupant of the host vehicle, to apply the brakes immediately or after a certain time, based on the break threat number value.
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Citations
16 Claims
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1. A method for avoiding collision between a host vehicle and a target vehicle, the method comprising:
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locating current positions of the host vehicle and the target vehicle and defining a potential collision zone; assuming target and host vehicle lengths, determining whether the assumed vehicle lengths are incorrect, and if incorrect, adjusting the assumed lengths; checking whether the target vehicle currently intercepts the host vehicle'"'"'s path, taking into consideration the adjusted assumed lengths of the vehicles; predicting host vehicle'"'"'s position at the instant when the target vehicle is expected to reach the potential collision zone; calculating a host vehicle speed change value required by the host vehicle to avoid a collision with the target vehicle, based on the adjusted assumed lengths; and providing signals to the host vehicle to effect the host vehicle speed change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification