Method of determining the position of a vehicle, arrangement for determining the position of a vehicle, as well as a vehicle provided with such an arrangement
First Claim
1. A method of determining the route traveled by a vehicle comprising:
- measuring navigation parameters relating to the movement of the vehicle;
utilizing the navigation parameters to calculate dead reckoning coordinates of the vehicle;
comparing the calculated dead reckoning coordinates to stored global information representing at least one of topographical and traffic technical information for a general area;
selecting from the stored global information local information representing at least one of topographical and traffic technical information for a specific area in which the calculated dead reckoning coordinates lie;
storing the selected local information in a local navigation data base;
selecting from the local information stored in the local navigation data base route segments which are consistent with vehicle positions represented by the calculated dead reckoning coordinates;
storing the selected route segments in a first predefined data structure.
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Accused Products
Abstract
For the determination of the position of a vehicle, navigation parameters are measured, with which periodically dead reckoning coordinates are calculated, which are compared to topographical and traffic technical information stored in a global data base. A local navigation data base is being kept and updated, containing relevant sub-information from the global data base. Using the dead reckoning coordinates test steps are performed on route segments from the local navigation data base, on the basis of which route segments forming possibly driven routes, are stored in a data structure and pseudo-segments are derived from consecutively calculated dead reckoning coordinates which form a pseudo-route and are stored in a further data structure. By comparing the route segments in the data structure and the pseudo-segments in the further data structure a well-founded correction vector for the dead reckoning coordinates is periodically determined.
156 Citations
16 Claims
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1. A method of determining the route traveled by a vehicle comprising:
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measuring navigation parameters relating to the movement of the vehicle; utilizing the navigation parameters to calculate dead reckoning coordinates of the vehicle; comparing the calculated dead reckoning coordinates to stored global information representing at least one of topographical and traffic technical information for a general area; selecting from the stored global information local information representing at least one of topographical and traffic technical information for a specific area in which the calculated dead reckoning coordinates lie; storing the selected local information in a local navigation data base; selecting from the local information stored in the local navigation data base route segments which are consistent with vehicle positions represented by the calculated dead reckoning coordinates; storing the selected route segments in a first predefined data structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An arrangement for determining the route traveled by a vehicle comprising:
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means for providing navigation parameters relating to the movement of the vehicle; a memory for storing a global data base containing at least one of topographical and traffic technical information for a general area; a processor for utilizing the navigation parameters to calculate dead reckoning coordinates of the vehicle and for comparing said coordinates to information in the stored global data base; a memory for storing a dynamic local navigation data base containing information selected from the global data base for a specific area in which the calculated dead reckoning coordinates lie; a first working memory for storing, in a first predefined data structure, route segments which are consistent with vehicle positions represented by the calculated dead reckoning coordinates; a second working memory for storing, in a second predefined data structure, pseudo segments which are derived &
rom consecutively calculated dead reckoning coordinates and represent a pseudo route;said processor also being adapted to compare the contents of the first and second working memories to determine a correction vector for the dead reckoning coordinates. - View Dependent Claims (16)
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Specification