Driving assistance system
First Claim
1. A driving assistance system for a vehicle, the system comprising:
- a map storage device for storing map data including information items relating to spots including at least one of a facility, a site, and a road;
a current position detector for detecting a current position of the vehicle using the stored map data;
an executing unit for executing a driving assistance application for a control target in the vehicle using map data on proximity of the detected current position of the vehicle; and
a map reliability degree computing unit for computing a map reliability degree, which indicates an accuracy of the map data on proximity of the detected current position with respect to an information item relating to a spot included in the proximity, wherein the executing unit executes the driving assistance application based on an operation associated with the computed map reliability degree.
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Accused Products
Abstract
A control circuit detects a current position of a subject vehicle on a map. Before executing a driving assistance application, the control circuit computes a map reliability degree by using a positioning accuracy coefficient, a time-based change coefficient, and an information accuracy coefficient. The positioning accuracy coefficient indicates a positioning accuracy of map data with respect to a target spot. The time-based change coefficient indicates a time-based change of the map data from the latest investigation for the target spot. The information accuracy coefficient indicates an accordance ratio of the map data relative to actual data with respect to multiple information items related to the target spot. The map data can be used for executing the driving assistance application when the product of (i) a required accuracy designated to the application and (ii) the computed map reliability degree is equal to or more than a predetermined value.
27 Citations
9 Claims
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1. A driving assistance system for a vehicle, the system comprising:
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a map storage device for storing map data including information items relating to spots including at least one of a facility, a site, and a road;
a current position detector for detecting a current position of the vehicle using the stored map data;
an executing unit for executing a driving assistance application for a control target in the vehicle using map data on proximity of the detected current position of the vehicle; and
a map reliability degree computing unit for computing a map reliability degree, which indicates an accuracy of the map data on proximity of the detected current position with respect to an information item relating to a spot included in the proximity, wherein the executing unit executes the driving assistance application based on an operation associated with the computed map reliability degree. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for executing a driving assistance application for a control target in a vehicle based on map data having information items relating to spots including at least one of a facility, a site, and a road, the method comprising:
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detecting a current position of the vehicle;
computing a map reliability degree, which indicates an accuracy of map data on proximity of the detected current position of the vehicle with respect to an information item of a spot included in the proximity; and
determining, based on the computed map reliability degree, whether the map data on proximity of the detected current position is allowed to be used for executing the driving assistance application.
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Specification