Navigation system
First Claim
1. A navigation system for use on a mobile object, comprising:
- GPS positioning means for receiving radio waves from GPS satellites, determining the present position of the mobile object based on the received radio waves, and outputting first positional data indicative of the determined position;
self-operating positioning means having a sensor on the mobile object for determining the present position of the mobile object and outputting second positional data indicative of the predetermined position;
determining means for comparing said first positional data and said second positional data to determine whether or not the difference between the present position of the mobile object as indicated by said first positional data and the present position of the mobile object as indicated by said second positional data is equal to or greater than a predetermined value; and
correcting means for adding an offset value to said first positional data so that said first positional data becomes coincident with said second positional data if said difference is equal to or greater than said predetermined value.
1 Assignment
0 Petitions
Accused Products
Abstract
A navigation system for use on an automobile, for example, has a GPS receiver for receiving radio waves from GPS satellites, determining the present position of the mobile object based on the received radio waves, and outputting first positional data indicative of the determined position, and a self-operating positioning device for determining the present position of the mobile object based on signals from speed and orientation sensors on the automobile and outputting second positional data indicative of the determined position. The navigation system also has a data processor for comparing the first positional data and said second positional data to determine whether or not the difference between the present position of the mobile object as indicated by said first positional data and the present position of the mobile object as indicated by said second positional data is equal to or greater than a predetermined value, and for adding an offset value to said first positional data if said difference is equal to or greater than said predetermined value.
110 Citations
14 Claims
-
1. A navigation system for use on a mobile object, comprising:
-
GPS positioning means for receiving radio waves from GPS satellites, determining the present position of the mobile object based on the received radio waves, and outputting first positional data indicative of the determined position; self-operating positioning means having a sensor on the mobile object for determining the present position of the mobile object and outputting second positional data indicative of the predetermined position; determining means for comparing said first positional data and said second positional data to determine whether or not the difference between the present position of the mobile object as indicated by said first positional data and the present position of the mobile object as indicated by said second positional data is equal to or greater than a predetermined value; and correcting means for adding an offset value to said first positional data so that said first positional data becomes coincident with said second positional data if said difference is equal to or greater than said predetermined value. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A navigation system for use on a mobile object, comprising:
-
GPS positioning means for receiving radio waves from GPS satellites, determining the present position of the mobile object based on the received radio waves, and outputting first positional data indicative of the determined position; self-operating positioning means having a sensor on the mobile object for determining the present position of the mobile object and outputting second positional data indicative of the determined position; determining means for comparing said first positional data and said second positional data to determine whether or not the difference between the present position of the mobile object as indicated by said first positional data and the present position of the mobile object as indicated by said second positional data is equal to or greater than a predetermined value; correcting means for adding an offset value to said first positional data so that said first positional data becomes coincident with said second positional data if the difference is equal to or greater than said predetermined value; position calculating means for outputting display data to display the present position of the mobile object based on said first positional data as corrected by said correcting means; and display means for displaying the present position of the mobile object based on said display data. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
-
Specification