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
28 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 in 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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21. A navigation apparatus, comprising:
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a memory that stores first road data representing a first route on a road and that stores second road data representing a second route on the road; and
a controller that performs a map matching routine to determine a current location of a mobile body, wherein the controller performs the map matching routine based on the first road data to determine the current location when the mobile body is not in a predetermined region of the road, wherein the controller performs the map matching routine based on the second road data to determine the current location when the mobile body is in the predetermined region. - View Dependent Claims (22, 24, 25, 26, 27, 28)
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23. A navigation apparatus, comprising:
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a detector for detecting a detected story of a multi-story building in which a mobile body is present;
a memory that stores first story data that represents a first story of the multi-story building and that stores second story data that represents a second story of the multi-story building; and
a controller that performs a map matching routine, wherein the controller determines a current location of the mobile body based on the detected story detected by the detector and based on at least one of the first story data and the second story data.
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Specification