Map-matching navigation system
First Claim
Patent Images
1. A map matching navigation system to determine a location of a vehicle on a map route, comprising:
- a. a sensor to measure at least one vehicle state characteristic;
b. a navigator coupled with said sensor to determine a measured point of the vehicle based upon the at least one vehicle state characteristic;
c. a map database including a plurality of links and a plurality of nodes to define the map route;
d. a correlator coupled with said navigator and said map database to determine a matched point of the vehicle on the map route which corresponds to the measured point; and
e. an analyzer coupled with said correlator to detect an end of a curve in the map route and updating the measured point and the matched point to the end of the curve.
1 Assignment
0 Petitions
Accused Products
Abstract
A map matching navigation system for monitoring vehicle state characteristics including the location of a vehicle on a map route. The map matching navigation system may operate in a fixed mode wherein the map route is inputted by a user or a flexible mode wherein the map matching navigation system determines the map route from a plurality of measured points which correspond to the location of the vehicle. The map matching navigation system additionally updates the location of the vehicle at a plurality of positions on the map route wherein the vehicle location is known with an increased level of confidence.
-
Citations
26 Claims
-
1. A map matching navigation system to determine a location of a vehicle on a map route, comprising:
-
a. a sensor to measure at least one vehicle state characteristic; b. a navigator coupled with said sensor to determine a measured point of the vehicle based upon the at least one vehicle state characteristic; c. a map database including a plurality of links and a plurality of nodes to define the map route; d. a correlator coupled with said navigator and said map database to determine a matched point of the vehicle on the map route which corresponds to the measured point; and e. an analyzer coupled with said correlator to detect an end of a curve in the map route and updating the measured point and the matched point to the end of the curve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method of locating a vehicle on a map route, comprising:
-
a. measuring at least one vehicle state characteristic; b. computing a measured point of the vehicle based upon the at least one vehicle state characteristic; c. correlating the measured point to a matched point on the map route; d. searching the map route for a curve therein which exceeds a predetermined threshold; e. updating the measured point and matched point to a point corresponding to the end of the curve; and f. displaying the map route and the matched point thereon. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
-
-
23. A map matching navigation system to determine a location of a vehicle on a map route, comprising:
-
a. a navigator to determine a measured point of the vehicle; b. a map database including a plurality of map routes; c. a correlator coupled with said navigator and said map database to determine at least one matched point of the vehicle on a plurality of candidate routes and each of the at least one matched point corresponds to the measured point; d. a map route processor coupled with said correlator and said map database, said map route processor calculating at least one statistical parameter from a deviation distance between said at least one measured point and said at least one matched point to determine the map route from a plurality of candidate routes; and e. an analyzer coupled with said correlator and said map route processor to detect an end of a curve in the map route and update the measured point and the matched point to the end of the curve. - View Dependent Claims (24, 25)
-
-
26. A map matching navigation system to determine a location of a vehicle on a map route, comprising:
-
a. a navigator to determine a measured point of the vehicle; b. a map database including a plurality of map routes; c. a correlator coupled with said navigator and said map database to determine at least one matched point of the vehicle on a plurality of candidate routes and each of the at least one matched point corresponds to the measured point; d. a map route processor coupled with said correlator and said map database, said map route processor calculating at least one statistical parameter from a deviation distance between said at least one measured point and said at least one matched point to determine the map route from a plurality of candidate routes, said map route processor calculating a correlation characteristic for said at least on statistical parameter and confirms a map route from said plurality of candidate routes using said correlation characteristic, said map route processor identifying the map route from the candidate routes and the map route has a correlation characteristic within a preselected range; and e. an analyzer coupled with said correlator and said map route processor to detect an end of a curve in the map route and update the measured point and the matched point to the end of the curve.
-
Specification