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Navigation device

A technology of navigation equipment and guidance control, applied in directions such as navigation, surveying and navigation, road network navigator, etc., can solve the problems of difficult exit road guidance and inconsistent exit numbers.

Inactive Publication Date: 2013-05-01
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, users have difficulty in understanding guidance on exit roads
Also, if the navigation device updates the roundabout exit number according to its own rules, the updated exit number may not match the actual exit number

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 example

[0035] will now refer to figure 2 Describe the roundabout guidance process. figure 2 is a flowchart describing the roundabout guidance process of the first embodiment. The roundabout guidance process is performed as part of the route guidance process.

[0036] At S100, the controller 29 determines whether there is a roundabout in the guidance route from the current position to the destination point. When there is a roundabout in the guidance route (Yes, S100), the process proceeds to S102. This roundabout guidance process ends when there are no roundabouts in the guidance route.

[0037] At S102, the controller 29 refers to the road data on the connecting roads of the roundabout in the guidance route, and determines whether there is a learned road registered in the learned road data as a connection of the roundabout. In other words, the controller 29 determines whether the learned road is included in the connecting roads of the roundabout. In the above, the connecting r...

no. 2 example

[0053] will refer to Figure 5 with 6 The process performed by the controller 29 is described.

[0054] Figure 5 is a flowchart describing the exit number acquisition process. For example, the exit number acquisition process is performed after a new learned road connected to a roundabout is registered in the learned road data.

[0055] At S200, the controller 29 sets the exit number guide flag corresponding to the process-target roundabout with the learned road to OFF. The exit number guidance sign is a sign for determining whether to perform guidance on the exit road of the roundabout in exit number guidance form when the learned road is included in the connection road of the intersection.

[0056] At S202, the controller 29 acquires the established exit number corresponding to the process-target roundabout with the learned road from the outside (ie, the external information provider). For example, via the communication device 23, the controller 29 can acquire the lates...

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Abstract

A controller determines whether circular intersection on guidance route from current position to destination point is present. The controller determines whether read road information is registered in road database, if circular intersection on guidance route is present. The controller provides exit point of circular intersection, if read road is not included in connector roads of circular intersection. The controller provides guidance on circular intersection road during management mode, if read road is included in connector roads of circular intersection.

Description

technical field [0001] The present disclosure relates to a navigation device that performs route guidance based on map data and learned road data. The learned road data is acquired based on the route traveled by the vehicle. Background technique [0002] Known navigation apparatuses learn roads that are not registered in prepared map data based on travel trajectories of movable bodies such as vehicles. For example, the road learning function generates and stores new roads by generating and storing new roads based on the travel trajectory from the current position of the movable body away from the pre-stored road points in the map data to the current position of the movable body back to the pre-stored road points in the map data, thereby A new road (learned road) not registered in the map data is learned. [0003] For an in-vehicle navigation device, there is known a route guidance method for a roundabout (see JP-2007-71601A1, corresponding to US2007 / 0055444A1). A roundabo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/34
CPCG01C21/34G01C21/3632
Inventor 田中宽加藤诚治
Owner DENSO CORP