Navigation apparatus
First Claim
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1. A navigation apparatus comprising:
- a current position detector for producing data of a current location of a mobile body on the basis of at least one of navigation parameters of the mobile body and measurement data supplied from a plurality of artificial satellites;
a storage device for storing map data which includes road data representing one route on a road, the map data also including additional road data for a predetermined region on the road, the additional road data representing another route on the road other than the one route; and
a map matching device for applying a map matching process to the data produced by the current position detector, using the road data, to determine the current location of the mobile body when the mobile body is not adjacent to the predetermined region, and for applying the map matching process to the data produced by the current position detector, using one of the additional road data and the road data depending upon a moving condition of the mobile body, to determine the current location of the mobile body when the mobile body is adjacent to or in the predetermined region.
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Abstract
Map data stored in a memory includes normal road data and additional road data for predetermined regions along a highway. A current location of a moving body is detected by sensor(s). The normal road data or additional road data is selected on the basis of the detected current location of the moving body. A map matching process is performed with the selected road data. Accordingly, the current location of the moving body is determined in the map matching process with high accuracy.
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Citations
20 Claims
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1. A navigation apparatus comprising:
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a current position detector for producing data of a current location of a mobile body on the basis of at least one of navigation parameters of the mobile body and measurement data supplied from a plurality of artificial satellites;
a storage device for storing map data which includes road data representing one route on a road, the map data also including additional road data for a predetermined region on the road, the additional road data representing another route on the road other than the one route; and
a map matching device for applying a map matching process to the data produced by the current position detector, using the road data, to determine the current location of the mobile body when the mobile body is not adjacent to the predetermined region, and for applying the map matching process to the data produced by the current position detector, using one of the additional road data and the road data depending upon a moving condition of the mobile body, to determine the current location of the mobile body when the mobile body is adjacent to or in the predetermined region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A navigation apparatus for determining a current location of a mobile body which moves i n a multi-story building, comprising:
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a current position detector for producing data of the current location of the mobile body on the basis of at least one of navigation parameters of the mobile body and measurement data supplied from a plurality of artificial satellites;
a story detector for detecting a story of the multi-story building in which the mobile body is present;
a storage device for storing map data which includes a plurality of road data representing a plurality of stories of the multi-story building respectively; and
a map matching device for retrieving road data representing the story detected by the story detector from the storage device, and applying a map matching process to the data produced by the current position detector, using the retrieved road data, to determine the current location of the mobile body. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of determining a current location of a mobile device, comprising the steps of:
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A) providing map data which includes road data representing one route on a road, the map data also including additional road data for a predetermined region on the road, the additional road data representing another route on the road other than the one route;
B) producing data of a current location of the mobile body on the basis of at least one of information supplied from self-contained sensors and information supplied from a GPS device; and
C) applying a map matching process to the data produced in Step B, using the road data, to determine the current location of the mobile body when the mobile body is not adjacent to the predetermined region, and for applying the map matching process to the data produced in Step B, using either one of the additional road data and the road data depending upon a moving condition of the mobile body, to determine the current location of the mobile body when the mobile body is adjacent to the predetermined region.
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20. A method of determining a current location of a mobile body which moves in a multi-story building, comprising the steps of:
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A) providing map data which includes a plurality of road data representing a plurality of stories of the multi-story building respectively;
B) producing data of the current location of the mobile body on the basis of at least one of information supplied from self-contained sensors and information supplied from a GPS device;
C) detecting a story of the multi-story building in which the mobile body is present;
D) retrieving road data representing the story detected in Step C from the map data; and
E) applying a map matching process to the data produced in Step B, using the road data retrieved in Step C, to determine the current location of the mobile body.
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Specification