INTELLIGENT FORWARD COLLISION WARNING SYSTEM
First Claim
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1. An intelligent forward collision warning system, comprising:
- a detection device mounted on an ego vehicle, the detection device being configured to detect at least a first preceding vehicle immediately ahead of the ego vehicle and a second preceding vehicle immediately ahead of the first preceding vehicle;
a vehicle speed sensor configured to detect a traveling speed of the ego vehicle;
a first TTC computing unit for computing a first TTC given as a time to collision for the ego vehicle in relation to the first preceding vehicle according to a speed of the first preceding vehicle determined from an output of the detection device and the traveling speed of the ego vehicle detected by the vehicle speed sensor;
a second TTC computing unit for computing a second TTC given as a time to collision for the first preceding vehicle in relation to the second preceding vehicle according to the speed of the first preceding vehicle and a speed of the second preceding vehicle determined from an output of the detection device; and
a determination unit for producing a warning signal upon detecting a critical state of the first or second preceding vehicle or an external condition that is predicted to cause the first preceding vehicle and the ego vehicle to be in a same lane with the first TTC below a prescribed value.
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Abstract
In an intelligent forward collision warning system that takes into account not only a first preceding vehicle traveling immediately ahead of the ego vehicle but also a second preceding vehicle traveling immediately ahead of the first preceding vehicle, a warning signal is produced upon detecting a critical state of the first or second preceding vehicle or an external condition that is predicted to cause the first preceding vehicle and the ego vehicle to be in a same lane with the first time to collision (TTC) below a prescribed value.
32 Citations
15 Claims
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1. An intelligent forward collision warning system, comprising:
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a detection device mounted on an ego vehicle, the detection device being configured to detect at least a first preceding vehicle immediately ahead of the ego vehicle and a second preceding vehicle immediately ahead of the first preceding vehicle; a vehicle speed sensor configured to detect a traveling speed of the ego vehicle; a first TTC computing unit for computing a first TTC given as a time to collision for the ego vehicle in relation to the first preceding vehicle according to a speed of the first preceding vehicle determined from an output of the detection device and the traveling speed of the ego vehicle detected by the vehicle speed sensor; a second TTC computing unit for computing a second TTC given as a time to collision for the first preceding vehicle in relation to the second preceding vehicle according to the speed of the first preceding vehicle and a speed of the second preceding vehicle determined from an output of the detection device; and a determination unit for producing a warning signal upon detecting a critical state of the first or second preceding vehicle or an external condition that is predicted to cause the first preceding vehicle and the ego vehicle to be in a same lane with the first TTC below a prescribed value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification