Method and apparatus for correcting current position in navigation system via human-machine interface
First Claim
1. An apparatus for correcting a user position in a navigation system, comprising:
- one or more processors for controlling overall operations of the navigation system;
a human-machine interface for interaction between the navigation system and a user, the interface further comprising at least a display;
one or more navigation sensors configured to detect sensor data proximate to the user position;
one or more positioning receivers of the navigation system which receives and analyzes positioning signals to estimate the user position;
a map database which stores digital map data of road networks including at least coordinate positions and attributes of road segments and road nodes, anda positioning module configured to;
receive an indication from the user that the user position is incorrect;
examine by a first map-matching algorithm a map database and the sensor data to find at least one candidate position;
present, via the human-machine interface, the at least one candidate position to the user;
receive from the user a selection from the at least one candidate, the selection indicating a location of the user as perceived by the user,perform an integrity check on the selection, wherein the selection is validated by determining whether the selection satisfies at least one of a threshold and a probability range, where the threshold is a set threshold for a map-matching probability and the probability range is a set range measured from a likeliest match; and
update the user position on a digital map image displayed on the human-machine interface in accordance with the integrity check.
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Abstract
A method and apparatus are provided for correcting position error in a navigation system by utilizing user input received via a human-machine interface, where the user input indicates the location of a user as perceived by the user. The navigation system includes a positioning module, navigation sensors, a map database and a human-machine interface that are employed to calculate and display the current position to the user. The method and apparatus are advantageously used in situations with intermittent or unavailable GPS signal, cumulative navigational sensor errors, and cases where map database information is incorrect. The positioning module receives and processes user input from the human-machine interface and analyzes the user input against the result of a map-matching algorithm to correct positioning errors.
8 Citations
8 Claims
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1. An apparatus for correcting a user position in a navigation system, comprising:
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one or more processors for controlling overall operations of the navigation system; a human-machine interface for interaction between the navigation system and a user, the interface further comprising at least a display; one or more navigation sensors configured to detect sensor data proximate to the user position; one or more positioning receivers of the navigation system which receives and analyzes positioning signals to estimate the user position; a map database which stores digital map data of road networks including at least coordinate positions and attributes of road segments and road nodes, and a positioning module configured to; receive an indication from the user that the user position is incorrect; examine by a first map-matching algorithm a map database and the sensor data to find at least one candidate position; present, via the human-machine interface, the at least one candidate position to the user; receive from the user a selection from the at least one candidate, the selection indicating a location of the user as perceived by the user, perform an integrity check on the selection, wherein the selection is validated by determining whether the selection satisfies at least one of a threshold and a probability range, where the threshold is a set threshold for a map-matching probability and the probability range is a set range measured from a likeliest match; and update the user position on a digital map image displayed on the human-machine interface in accordance with the integrity check. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification