EP0703434A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Vehicular navigation system
Assignee: Aisin AW Co Ltd
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Filing: 1995-09-05
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Granted: —
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Expires: 2015-09-05
Abstract
Abstract In order to provide a driver with guidance for a direction of travel without confusing the driver even in a case where the angular difference between an approach road and a departing road at a branch point is very small or even when a branch point has a complicated shape, a navigation system is provided with present-position sensing means for calculating present position of the vehicle; input means for entering information necessary for calculating a route; output means for giving notification of information for carrying out route guidance; an information storage device in which all data necessary to carry out route guidance has been stored; route calculating means for calculating a route based upon the information entered by the input means; route storage means for temporarily storing the route calculated by the route calculating means; and guidance control means for outputting guidance information relating to the route to the output means. The information storage device stores branch-point data and road data connected to branch points and has direction data indicative of a departing road with respect to an approach road connected thereto by a branch point. The guidance control means outputs the guidance information to the output means based upon the direction data.
Inventors
- 👤 Kyomi c/o Aisin AW Co. Ltd. Morimoto
- 👤 Kazuteru c/o Aisin AW Co. Ltd. Maekawa
- 👤 Akimasa c/o Aisin AW Co. Ltd. Nanba
- 👤 Wataru c/o Aisin AW Co. Ltd. Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 21:18
CPC Classifications
G; G01; G01C; G01C21/00; G01C21/26; G01C21/34; G01C21/36; G01C21/3626; G01C21/3629; G01C21/3632; G01C21/3644; G01C21/3655; G01C21/3658; G01C21/3667; G01C21/367
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
159 words
A navigation system for a vehicle, comprising: present-position sensing means for calculating present position of the vehicle; input means for entering information necessary for calculating a route; output means for giving notification of information for carrying out route guidance; an information storage device in which all data necessary to carry out route guidance has been stored; route calculating means for calculating a route based upon the information entered by said input means; and a central processor having route storage means for temporarily storing the route calculated by said route calculating means, and guidance control means for outputting guidance information relating to the route to said output means; said information storage device storing branch-point data and road data connected to branch points and having direction data indicative of a departing road with respect to an approach road connected thereto by a branch point; said guidance control means outputting the guidance information to said output means based upon the direction data.
Claim 2
Dependent Claim
73 words
The system according to claim 2, wherein said guidance control means has determination means for determining whether the direction data indicative of a departing road with respect to an approach road connected thereto by a branch point resides in said route storage means, said guidance control means outputting the guidance information to said output means based upon the direction data in a case where the direction data resides in said route storage means.
Claim 3
Dependent Claim
83 words
The system according to claim 2, wherein said guidance control means has arithmetic means for calculating direction of travel based upon an angular difference which the departing road forms with the approach road, the direction of travel being calculated by said arithmetic means and said guidance control means outputting the guidance information to said output means based upon the direction of travel in a case where the direction data is found not to reside in said route storage means by said determination means.
Claim 4
Dependent Claim
82 words
The system according to claim 1, 2 or 3, wherein said output means comprises display means for giving notification, on a screen, of the information necessary to carry out route guidance, and/or voice output means for giving notification, by voice, of the information necessary to carry out route guidance, and that said guidance control means comprises display control means for outputting the guidance information to said display means and/or voice control means for outputting the guidance information to said voice output means.
Claim 5
Dependent Claim
40 words
The system according to claim 4, wherein said display control means outputs arrow information indicating direction based upon the direction data to said output means, and said display means displays an arrow on the screen based upon the arrow information.
Claim 6
Dependent Claim
263 words
A navigation system for a vehicle, comprising: present-position sensing means for calculating present position of the vehicle; input means for entering information necessary for calculating a route; output means for giving notification of information for carrying out route guidance; information storage means in which all data necessary to carry out route guidance has been stored; route calculating means for calculating a route based upon the information entered by said input means; and guidance control means for reading out data, which has been stored in said information storage means, along the route calculated by said route calculating means, and outputting this data to said output means; wherein said information storage means stores route-guidance auxiliary information data, and said guidance control means reads data relating to a branch point at which guidance is required for travel forward of the present position, which has been sensed by said present-position sensing means, out of data relating to a route, which has been stored in said information storage means, in a case where the present position is on a route, currently being suggested, calculated by said route calculating means, said guidance control means having determination means for determining whether the route-guidance auxiliary information data is to be added onto guidance relating to said branch point, wherein when it has been determined by said determination means that the route-guidance auxiliary information is to be added onto the guidance relating to the branch point, said guidance control means adds the route-guidance auxiliary information onto the guidance relating to the branch point and then outputs the result to said output means.
Claim 7
Dependent Claim
77 words
The system according to claim 6, wherein said determination means retrieves data, from among data relating to a route calculated by said route calculating means and stored in said information storage means, within a predetermined range beyond the branch point at which guidance is required, and, in a case where the information-guidance auxiliary information data in said data, determines that said road-guidance auxiliary information data is to be added onto the guidance relating to said branch point.
Claim 8
Dependent Claim
124 words
The system according to claim 7, wherein said information storage means stores data, which is necessary to perform the route guidance, in correspondence with respective ones of roads connecting each branch point, and stores the route, calculated by said route calculating means, as a road sequence, and said determination means determines that said road-guidance auxiliary information data is to be added onto the guidance relating to said branch point in a case where, among the data stored in the road sequence of the route, the data of a road sequence within a predetermined distance beyond the branch point at which guidance is necessary or the data of a road sequence up to a road spanning a predetermined distance contains said road-guidance auxiliary information data.
Claim 9
Dependent Claim
39 words
The system according to claim 7 or 8, wherein said determination means determines that road-guidance auxiliary information retrieved first in order of proximity to the branch point is to be added onto the guidance relating to said branch point.
Claim 10
Independent Claim
44 words
The system according to any of claims 6 to 9, wherein said road-guidance auxiliary information data represents an overpass, a road alongside an overpass, an underpass, a road alongside an underpass or a direction name in a direction of travel at a branch point.
References Cited (Backward Citations)
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