Collision avoidance using limited range gated video
First Claim
1. A collision avoidance system for a vehicle comprisinga collision avoidance processor,a single active sensor for obtaining successive range measurements to objects along a path transversed by the vehicle, the single active sensor includinga near range gate for obtaining a near range measurement to objects located at a range less than a first predetermined range, anda far range gate for obtaining a far range measurement to objects located at a range greater than a second predetermined range,wherein the near and far range measurements are provided to the collision avoidance processor from the single active sensor for maneuvering of the vehicle.
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Abstract
A collision avoidance system for a vehicle includes a collision avoidance processor, and an active sensor for obtaining successive range measurements to objects along a path transversed by the vehicle. The active sensor includes a near range gate for obtaining a near range measurement to objects located at a range less than a first predetermined range, and a far range gate for obtaining a far range measurement to objects located at a range greater than a second predetermined range. The near and far range measurements are provided to the collision avoidance processor for maneuvering of the vehicle.
287 Citations
20 Claims
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1. A collision avoidance system for a vehicle comprising
a collision avoidance processor, a single active sensor for obtaining successive range measurements to objects along a path transversed by the vehicle, the single active sensor including a near range gate for obtaining a near range measurement to objects located at a range less than a first predetermined range, and a far range gate for obtaining a far range measurement to objects located at a range greater than a second predetermined range, wherein the near and far range measurements are provided to the collision avoidance processor from the single active sensor for maneuvering of the vehicle.
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10. A method of collision avoidance for a vehicle comprising the steps of:
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(a) measuring, using a near range sate of a single sensor, a near range to objects located at a range less than a first predetermined range; (b) measuring, using a far range sate of the same single sensor, a far range to objects located at a range greater than a second predetermined range; (c) steering the vehicle in response to the single sensor measuring the objects located at the range greater than the second predetermined range; and (d) modifying step (c) in response to the single sensor measuring the objects located at the range less than the first predetermined range. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method of collision avoidance for a vehicle comprising the steps of:
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(a) imaging, using a near range gate of a sensor, a scene located at a first predetermined range; (b) imaging, using a far range sate of the same sensor, a scene located at a second predetermined range, the second predetermined range being greater than the first predetermined range; (c) locating at least one low density region in the scene imaged by the sensor at the second predetermined range; (d) selecting a low density region from low density regions located in step (c), and using the selected low density region as a steering aim point for the vehicle; and (e) modifying at least one of direction and velocity of the vehicle, while being steered toward the steering aim point, to avoid objects located by the sensor at the first predetermined range. - View Dependent Claims (18, 19, 20)
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Specification