Navigation device and position correction method
First Claim
1. A method for position correction in a navigation system when traveling in non-digitized areas by means of dead-reckoning navigation, comprising the following steps:
- detection of travel in a non-digitized area;
determination of at least one principle axis direction;
comparison of the direction of travel with the previously defined principle axis direction; and
, in the event of matching within a predefined limit, correction of the direction of travel according to the principle axis direction.
2 Assignments
0 Petitions
Accused Products
Abstract
The described navigation system makes use of the attribute pertaining to the existence of “preferred directions,” in particular, inside multi-story car parks. These preferred directions are not limited to a plane or to an orientation. Preferred directions are, in particular, longer entry and exit paths. The method detects a departure from the digitized area and then determines a preferred direction that is defined as a principle axis or a principle axis direction. When traveling within the non-digitized area, e.g. of a multi-story car park, the system monitors whether the vehicle moves within a predetermined limit of the previously defined principle axis direction. If this is the case, it is determined whether a deviation exists and this deviation is optionally corrected to conform with the principle axis direction. This enables compensation of errors that are caused, in particular, by the direction detection.
-
Citations
18 Claims
-
1. A method for position correction in a navigation system when traveling in non-digitized areas by means of dead-reckoning navigation, comprising the following steps:
-
detection of travel in a non-digitized area;
determination of at least one principle axis direction;
comparison of the direction of travel with the previously defined principle axis direction; and
,in the event of matching within a predefined limit, correction of the direction of travel according to the principle axis direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A navigation device for dead-reckoning navigation, comprising:
-
at least one sensor arrangement for determining a distance and a direction, at least one processor for position calculation based on measured values of the sensor arrangement, which is connected to a memory, a digitized road map stored on a storage medium with digitized areas, with which a calculated position is compared, wherein the processor, on entry into a non-digitized area, determines at least one principle axis direction and stores it in the memory, and the processor compares the current direction of travel with the previously determined principle axis direction and, if necessary, corrects it according to the principle axis direction. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
-
Specification