Driving support device and driving support method

Abstract

The invention provides a technique which can execute driving assistance under non-matching state. Under the matching state, the state of a matching road chain is determined by reliability above a regulated reference in a map matching process. In the map matching process, a road chain, equivalent to a road area of existing vehicle is determined to be the matching road chain. The current position of the vehicle is detected. Under the non-matching state, a road chain equivalent to a road area closest to the current position is determined as a candidate road chain. An object node of a judging object is connected to a plurality of road chains, and when the candidate road chain changes from one of the plurality of road chains into other road chains, it is determined that the vehicle has passed the position expressed by the object node, and a predetermined driving assistance is conducted.

Description

technical field

[0001] The present invention relates to a driving assistance device and method for assisting (assisting) driving of a vehicle. Background technique

[0002] Conventionally, there is a technique for assisting the driving of a vehicle according to the driving situation of the vehicle. For example, Patent Document 1 discloses a technique for performing driving assistance when merging into an arterial road from an access road, judging whether there is a node on the access road in front of the vehicle, and When the position of the node is indicated, it is determined that it is the start time of the driving assistance, and thus the driving assistance is started at the starting time.

[0003] prior art literature

[0004] patent documents

[0005] Patent Document 1: Japanese Patent Laid-Open No. 2008-129816

[0006] In general map information, a node is an end point of a road link. In order to determine the positional relationship between a node and a vehicle, i...

Examples

Embodiment approach

[0083] The above embodiment is an example for implementing the present invention, as long as it can be judged that the vehicle has passed the position indicated by the object node based on the change of the positional relationship between the candidate road link and the object node when it is not in a matching state, Various other embodiments are also possible. In the map matching process, various conditions can be added in order to judge whether it is a road section where a vehicle exists. For example, the following multiple structures can be adopted: the better the GPS reception status of the map matching process, the higher the reliability; The less likely the shape of the road to cause a mismatch, the higher the reliability.

[0084] When specifying link candidates, any link candidate can be specified based on the current position, and a method different from the map matching process described above for specifying a matching link with reliability higher than a predetermine...

technical field

[0001] The present invention relates to a driving assistance device and method for assisting (assisting) driving of a vehicle. Background technique

[0002] Conventionally, there is a technique for assisting the driving of a vehicle according to the driving situation of the vehicle. For example, Patent Document 1 discloses a technique for performing driving assistance when merging into an arterial road from an access road, judging whether there is a node on the access road in front of the vehicle, and When the position of the node is indicated, it is determined that it is the start time of the driving assistance, and thus the driving assistance is started at the starting time.

[0003] prior art literature

[0004] patent documents

[0005] Patent Document 1: Japanese Patent Laid-Open No. 2008-129816

[0006] In general map information, a node is an end point of a road link. In order to determine the positional relationship between a node and a vehicle, i...

Examples

Embodiment approach

[0083] The above embodiment is an example for implementing the present invention, as long as it can be judged that the vehicle has passed the position indicated by the object node based on the change of the positional relationship between the candidate road link and the object node when it is not in a matching state, Various other embodiments are also possible. In the map matching process, various conditions can be added in order to judge whether it is a road section where a vehicle exists. For example, the following multiple structures can be adopted: the better the GPS reception status of the map matching process, the higher the reliability; The less likely the shape of the road to cause a mismatch, the higher the reliability.

[0084] When specifying link candidates, any link candidate can be specified based on the current position, and a method different from the map matching process described above for specifying a matching link with reliability higher than a predetermine...

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