Vehicle navigation system
First Claim
1. A vehicle navigation system that executes a GPS positioning calculation based on radio waves transmitted from a plurality of GPS satellites to obtain a current position based on positioning data, the vehicle navigation system comprising:
- means for sensing a traveling speed of a vehicle;
means for judging whether the traveling speed of the vehicle is greater than, less than or equal to a reference speed, based on a result of the sensing;
means for averaging GPS positioning data when the traveling speed is judged to be less than or equal to the reference speed; and
means for calculating the current position based on the averaged GPS positioning data.
1 Assignment
0 Petitions
Accused Products
Abstract
To provide a vehicle navigation system that can accurately display a position of a vehicle that has the navigation system mounted thereon and a target direction even when the vehicle is stopped or traveling at low speed. The vehicle navigation system includes a device that senses a traveling state of a vehicle, a device that judges whether or not the vehicle is stopped or traveling at a low speed, and a device that smoothes GPS positioning data so that error components contained in the GPS positioning data are canceled out or compensated for when the vehicle is stopped or traveling at a low speed. The navigation system further includes a device that calculates the current position based on the smoothed GPS positioning data. The smoothing device outputs new positioning data, for example, based on current GPS positioning data and previous GPS positioning data.
14 Citations
18 Claims
-
1. A vehicle navigation system that executes a GPS positioning calculation based on radio waves transmitted from a plurality of GPS satellites to obtain a current position based on positioning data, the vehicle navigation system comprising:
-
means for sensing a traveling speed of a vehicle; means for judging whether the traveling speed of the vehicle is greater than, less than or equal to a reference speed, based on a result of the sensing; means for averaging GPS positioning data when the traveling speed is judged to be less than or equal to the reference speed; and means for calculating the current position based on the averaged GPS positioning data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A vehicle navigation system that executes a GPS positioning calculation based on radio waves transmitted from a plurality of GPS satellites to obtain a current position based on positioning data, the vehicle navigation system comprising:
-
a sensor that senses a traveling speed of a vehicle; a judging device that judges whether the traveling speed of the vehicle is greater than, less than or equal to a reference speed, based on a result of the sensing; an averaging device that averages GPS positioning data when the traveling speed is judged to be less than or equal to the reference speed; and a calculating device that calculates the current position based on the averaged GPS positioning data. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
-
Specification