System and method for providing target threat assessment in a collision avoidance system on a vehicle
First Claim
1. A method for providing target threat assessment in a collision avoidance system on a host vehicle, said method comprising:
- determining a predicted travel path of the host vehicle using motion dynamics of the host vehicle;
transmitting a scan signal from at least one sensor on the host vehicle;
receiving multiple scan return points at the host vehicle from one or more detected objects that reflect the scan signal;
generating a probability function distribution signal defining a contour of each detected object using the scan signal;
calculating a position and velocity of each detected object using the scan return points;
selecting the detected objects which have a probability exceeding a threshold of being in or entering the predicted travel path of the host vehicle using a probabilistic technique and the distribution signal, position and velocity of each detected object; and
determining a threat assessment of the selected objects by analyzing a time to collision (TTC) for each of the selected objects.
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Accused Products
Abstract
A system and method for providing target selection and threat assessment for vehicle collision avoidance purposes that employ probability analysis of radar scan returns. The system determines a travel path of a host vehicle and provides a radar signal transmitted from a sensor on the host vehicle. The system receives multiple scan return points from detected objects, processes the scan return points to generate a distribution signal defining a contour of each detected object, and processes the scan return points to provide a position, a translation velocity and an angular velocity of each detected object. The system selects the objects that may enter the travel path of the host vehicle, and makes a threat assessment of those objects by comparing a number of scan return points that indicate that the object may enter the travel path to the number of the scan points that are received for that object.
42 Citations
20 Claims
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1. A method for providing target threat assessment in a collision avoidance system on a host vehicle, said method comprising:
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determining a predicted travel path of the host vehicle using motion dynamics of the host vehicle; transmitting a scan signal from at least one sensor on the host vehicle; receiving multiple scan return points at the host vehicle from one or more detected objects that reflect the scan signal; generating a probability function distribution signal defining a contour of each detected object using the scan signal; calculating a position and velocity of each detected object using the scan return points; selecting the detected objects which have a probability exceeding a threshold of being in or entering the predicted travel path of the host vehicle using a probabilistic technique and the distribution signal, position and velocity of each detected object; and determining a threat assessment of the selected objects by analyzing a time to collision (TTC) for each of the selected objects. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for providing target threat assessment in a collision avoidance system on a host vehicle, said method comprising:
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determining a predicted travel path of the host vehicle using motion dynamics of the host vehicle; transmitting a radar signal from at least one radar sensor on the host vehicle; receiving multiple scan return points at the host vehicle from one or more detected objects that reflect the radar signal; generating a probability function distribution signal defining a contour of each detected object using the radar signal, wherein generating a distribution signal of each detected object includes updating the distribution signal at subsequent sample times using a Gaussian mixture model; calculating a position, a translation velocity and an angular velocity of each detected object using the scan return points; selecting the detected objects which have a probability exceeding a threshold of being in or entering the predicted travel path of the host vehicle using the distribution signal, position, translation velocity and angular velocity of each object, wherein selecting the detected objects which have a probability exceeding a threshold of being in or entering the predicted travel path of the host vehicle includes using a probabilistic technique; and determining a threat assessment of the selected objects by analyzing a time to collision (TTC) for each of the selected objects. - View Dependent Claims (12, 13, 14, 15, 16)
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17. An analysis system for providing target threat assessment in a collision avoidance system on a host vehicle, said analysis system comprising:
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vehicle dynamics sensors on the host vehicle providing vehicle motion dynamics data; at least one sensor on the host vehicle transmitting a scan signal and receiving multiple scan return points from one or more detected objects that reflect the scan signal; and a processor configured with an algorithm including steps of; determining a predicted travel path of the host vehicle using the vehicle motion dynamics data; generating a probability function distribution signal defining a contour of each detected object using the scan signal; calculating a position and velocity of each detected object using the scan return points; selecting the detected objects which have a probability exceeding a threshold of being in or entering the predicted travel path of the host vehicle using a probabilistic technique and the distribution signal, position and velocity of each detected object; and determining a threat assessment of the selected objects by analyzing a time to collision (TTC) for each of the selected objects. - View Dependent Claims (18, 19, 20)
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Specification