Navigation device for use in automotive vehicle

• US 20080065327A1
• Filed: 09/11/2007
• Published: 03/13/2008
• Est. Priority Date: 09/12/2006
• Status: Abandoned Application

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Sobue, Eiji
• Application Number:
  US11/898,229
• Publication Number:
  US 20080065327A1
• Time in Patent Office: Days
• US Class Current: 701/211
• CPC Class Codes: G01C 21/3815 Road data
• CPC Class Codes: G01C 21/3837 Data obtained from a single source
• CPC Class Codes: G01C 21/3844 Data obtained from position sensors only, e.g. from inertial navigation

Abstract

In a navigation device for use in an automotive vehicle, whether a present position of the vehicle is on an old road included in stored map data or on a new road not included in the stored map data is detected. When the vehicle enters onto the new road from the old road, whether a driving speed of the vehicle changed or not is checked. If the driving speed did not change, it is determined that the new road is actually a new road, and a driven locus on the new road is memorized. The driven locus is registered as a new road in the stored map data. In this manner, the new road is quickly registered after it is used only one time, while avoiding registration of a parking space or the like in error. In registering a new road, a driver'"'"'s intention may be asked to further reduce possibility of erroneous registration.

Claims

1. A navigation device for use in an automotive vehicle, the navigation device having a display panel on which a road map read out from stored map data and a present position of the vehicle are displayed, the navigation device comprising:

a speed detector for detecting a driving speed of the vehicle;

means for determining whether a road on which the vehicle is driving is included in the stored map data;

speed-change detecting means for detecting whether a driving speed of the vehicle changed when the vehicle entered onto a new road which is not included in the stored map data from an old road included in the stored map data;

means for memorizing a driven locus of the vehicle for a period in which the vehicle is driven on the new road if the vehicle speed did not change when the vehicle entered onto the new road; and

means for registering the driven locus of the vehicle as a new road in the stored map data.

2. The navigation device as in claim 1, wherein:

the navigation device further includes means for asking a driver a question as to whether the vehicle has been driven on a newly build road when the vehicle returns onto the old road from the new road, and means for inputting a reply of the driver to the navigation device; and

the registering means registers the driven locus as a new road only when the question to the driver is affirmed.

4. The navigation device as in claim 1, wherein the speed change-detecting means determines that the driving speed of the vehicle changed if an amount of the speed change is higher than a predetermined amount.

3. A navigation device for use in an automotive vehicle, the navigation device having a display panel on which a road map read out from stored map data and a present position of the vehicle are displayed, the navigation device comprising:

means for determining whether the present position of the vehicle is on an old road which is included in the stored map data;

means for inputting to the navigation device at least both ends of a new road which is not included in the stored map data, the both ends of the new road being connected to the old road;

means for memorizing a driven locus of the vehicle during a period in which the vehicle is driven on the new road; and

means for registering the driven locus of the vehicle as a new road in the stored map data.