Method and system for impact time and velocity prediction
First Claim
Patent Images
1. A system for impact time and velocity prediction, comprising:
- at least one mid-range or long-range sensor operative to detect information regarding a geometric profile of a target object;
at least one short-range sensor behind a windshield on a downward angle, the short-range sensor being operative to detect information regarding a target object; and
a recursive filter in communication with each of the sensors to receive data therefrom;
wherein, when the target object is within a threshold distance of the host vehicle, detected information from the at least one short-range sensor is presumed inaccurate and the recursive filter omits said presumptively inaccurate information for use in predictions of at least a time and velocity of impact between the host vehicle and the target object.
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Abstract
A collision detection system includes at least one sensor. The data from the sensor is input to a recursive filter which selectively uses the input to predict the motion of a target object relative to a host vehicle. The recursive filter continues to use the data from the sensor until the target object is within a threshold distance of the host vehicle. Within the threshold distance, the sensor does not reliably provide accurate data. Accordingly, the recursive filter omits the sensor input from motion estimates when the target object is within the threshold distance, which leads to significant improvement in target motion prediction.
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Citations
11 Claims
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1. A system for impact time and velocity prediction, comprising:
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at least one mid-range or long-range sensor operative to detect information regarding a geometric profile of a target object; at least one short-range sensor behind a windshield on a downward angle, the short-range sensor being operative to detect information regarding a target object; and a recursive filter in communication with each of the sensors to receive data therefrom; wherein, when the target object is within a threshold distance of the host vehicle, detected information from the at least one short-range sensor is presumed inaccurate and the recursive filter omits said presumptively inaccurate information for use in predictions of at least a time and velocity of impact between the host vehicle and the target object. - View Dependent Claims (2, 3, 4, 5, 10)
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6. A method of predicting the time and/or velocity at which a host vehicle will impact an object, including:
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obtaining data relating to a potential target object from a short-range sensor placed behind a windshield at a downward angle and a long-range sensor;
said data from said long range sensor including geometric profile of said target object;providing the data as an input to a recursive filter; determining a threshold distance between a target object and a host vehicle wherein data sensed from at least the short-range sensor is presumptively inaccurate; and omitting presumptively inaccurate data in estimation calculations of at least the time and velocity at which a host vehicle will impact a target object. - View Dependent Claims (7, 8, 9, 11)
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Specification