Vehicle drive assist system, and drive assist implementation method
First Claim
1. A vehicle drive assist system executed on a controller, the system comprising:
- a position detection device that detects a position of a vehicle based on a detection signal from at least one of a plurality of vehicular sensors;
a map data acquisition device that acquires map data;
a map matching device that determines the position of the vehicle on a road by map matching processing based on a detected position detected by the position detection device and the map data;
an assist device that assists a driver'"'"'s operation based on a determined position of the vehicle determined by the map matching device and a road shape ahead of the vehicle in a traveling direction indicated on the map data;
a determination device that determines a probability that the vehicle travels a wrong way on a road where the traveling direction is fixed to one way; and
a cancel device that cancels drive assist executed by the assist device when the determination device determines that a probability of reverse run exists, wherein;
the map matching device has a reliability calculation device that estimates reliability of the determined position of the vehicle determined by the map matching device;
the assist device performs the drive assist when the reliability is equal to or greater than a threshold value; and
the cancel device forcibly reduces a numerical value of the reliability to be less than the threshold value when the determination device determines that the probability of reverse run exists.
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Accused Products
Abstract
A vehicle drive assist system includes: a position detection device that detects a position of a vehicle; a map data acquisition device that acquires map data; a map matching device that determines the position of the vehicle on a road based on a detected position and the map data; an assist device that assists a driver'"'"'s operation based on a determined position of the vehicle and a road shape ahead of the vehicle in a traveling direction indicated on the map data; a determination device that determines a possibility that the vehicle travels a wrong way on a road where the traveling direction is fixed to one way; and a cancel device that cancels drive assist when a possibility of reverse run exists.
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Citations
9 Claims
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1. A vehicle drive assist system executed on a controller, the system comprising:
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a position detection device that detects a position of a vehicle based on a detection signal from at least one of a plurality of vehicular sensors; a map data acquisition device that acquires map data; a map matching device that determines the position of the vehicle on a road by map matching processing based on a detected position detected by the position detection device and the map data; an assist device that assists a driver'"'"'s operation based on a determined position of the vehicle determined by the map matching device and a road shape ahead of the vehicle in a traveling direction indicated on the map data; a determination device that determines a probability that the vehicle travels a wrong way on a road where the traveling direction is fixed to one way; and a cancel device that cancels drive assist executed by the assist device when the determination device determines that a probability of reverse run exists, wherein; the map matching device has a reliability calculation device that estimates reliability of the determined position of the vehicle determined by the map matching device; the assist device performs the drive assist when the reliability is equal to or greater than a threshold value; and the cancel device forcibly reduces a numerical value of the reliability to be less than the threshold value when the determination device determines that the probability of reverse run exists. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A drive assist implementation method in a vehicle having an assist device that assists a driver'"'"'s operation executed on a controller, the method comprising:
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detecting a position of the vehicle based on a detection signal from at least one of a plurality of vehicular sensors; acquiring map data; determining the position of the vehicle on a road by map matching processing based on a detected position and the map data; assisting the driver'"'"'s operation with the assist device based on a determined position of the vehicle and a road shape ahead of the vehicle in a traveling direction indicated on the map data; determining a probability that the vehicle travels a wrong way on a road where the traveling direction is fixed to one way; and cancelling the drive assist executed by the assist device when it is determined that a probability of reverse run exists, wherein; the determining of the position includes estimating reliability of the determined position of the vehicle; the assisting of the driver'"'"'s operation includes performing the drive assist when the reliability is equal to or greater than a threshold value; and the cancelling of the drive assist includes forcibly reducing a numerical value of the reliability to be less than the threshold value when it is determined in the determining of the probability that the probability of reverse run exists.
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Specification