Obstacle warning system for a vehicle
First Claim
1. An obstacle warning system for a vehicle, comprising:
- obstacle detecting means for detecting a distance to an obstacle and an angle of the obstacle within a forward detection zone defined by a given angle in a width direction of the vehicle;
warning means for issuing an alarm when the obstacle detected by said obstacle detecting means satisfies a given warning condition;
guardrail detecting means for detecting a guardrail on the basis of the distance to the obstacle and the angle of the obstacle detected by said obstacle detecting means when the obstacle detected by said obstacle detecting means extends a long distance along a forward direction of the vehicle;
curved state detecting means for detecting a curved state of a road on the basis of a position of the guardrail detected by said guardrail detecting means; and
warning condition correcting means for correcting the warning condition on the basis of the curved state of the road detected by said curved state detecting means.
5 Assignments
0 Petitions
Accused Products
Abstract
As provided here, an obstacle warning system for a vehicle is capable of issuing an alarm accurately according to the curved state of a road. When the road is curved, the system sets the correction time counter on the basis of the following conditions: whether or not the curvature radius of the curved road is small; whether or not a guardrail is detected immediately ahead of the vehicle; whether or not an erroneously-recognized object, such as a set of guardrail reflectors exhibiting large relative acceleration is immediately ahead of the vehicle; and whether or not the number of obstacles recognized reaches a value indicating that the vehicle is approaching a curved section of the road. When a stationary object enters the field of view indicating that there is a possibility of a collision, the obstacle warning system corrects the warning distance in response to the value of the correction time counter, thus making it possible to avoid a false alarm during cornering.
309 Citations
8 Claims
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1. An obstacle warning system for a vehicle, comprising:
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obstacle detecting means for detecting a distance to an obstacle and an angle of the obstacle within a forward detection zone defined by a given angle in a width direction of the vehicle; warning means for issuing an alarm when the obstacle detected by said obstacle detecting means satisfies a given warning condition; guardrail detecting means for detecting a guardrail on the basis of the distance to the obstacle and the angle of the obstacle detected by said obstacle detecting means when the obstacle detected by said obstacle detecting means extends a long distance along a forward direction of the vehicle; curved state detecting means for detecting a curved state of a road on the basis of a position of the guardrail detected by said guardrail detecting means; and warning condition correcting means for correcting the warning condition on the basis of the curved state of the road detected by said curved state detecting means. - View Dependent Claims (2, 3, 4)
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5. An obstacle warning system for a vehicle, comprising:
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obstacle detecting means for detecting a distance to an obstacle and an angle of the obstacle within a forward detection zone defined by a given angle in a width direction of the vehicle; warning means for issuing an alarm when the obstacle detected by said obstacle detecting means satisfies a given warning condition; guardrail detecting means for detecting a guardrail on the basis of the distance to the obstacle and the angle of the obstacle detected by said obstacle detecting means when the obstacle detected by said obstacle detecting means extends a long distance along a forward direction of the vehicle; curved state detecting means for detecting a curved state of a road through determination as to whether or not the guardrail detected by said guardrail detecting means is located in a predetermined area in front of said vehicle; and warning condition correcting means for correcting the warning condition on the basis of the curved state of the road detected by said curved state detecting means. - View Dependent Claims (6, 7, 8)
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Specification