EP0522862A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
GPS Navigation system with selective position offset correction
Assignee: Pioneer Corp
•
Filing: 1992-07-09
•
Granted: —
•
Expires: 2012-07-09
Abstract
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.
Inventors
- 👤 Takahiro C/O Pioneer Electronic Corporation Kato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 01:07
CPC Classifications
G; G01; G01S; G01S19/00; G01S19/38; G01S19/39; G01S19/42; G01S19/50; G01C; G01C21/00; G01C21/26; G01C21/28; G01C21/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
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; and correcting means for adding an offset value to said first positional data if said difference is equal to or greater than said predetermined value.
Claim 2
Dependent Claim
201 words
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 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.
Claim 3
Dependent Claim
52 words
A navigation system according to claim 1, wherein said self-operating positioning means comprises memory means for storing the first positional data in a previous positioning cycle, and means for determining and outputting the second positional data in a present positioning cycle based on said first positional data in said previous positioning cycle.
Claim 4
Dependent Claim
52 words
A navigation system according to claim 2, wherein said self-operating positioning means comprises memory means for storing the first positional data in a previous positioning cycle, and means for determining and outputting the second positional data in a present positioning cycle based on said first positional data in said previous positioning cycle.
Claim 5
Dependent Claim
35 words
A navigation system according to claim 1, wherein said self-operating positioning means comprises means for correcting second orientation data contained in said second positional data with first orientation data contained in said first positional data.
Claim 6
Dependent Claim
35 words
A navigation system according to claim 2, wherein said self-operating positioning means comprises means for correcting second orientation data contained in said second positional data with first orientation data contained in said first positional data.
Claim 7
Dependent Claim
61 words
A navigation system according to claim 1, wherein said correcting means includes correction inhibiting means for preventing said first positional data from being corrected with said offset value the first time when said GPS positioning means outputs the first positional data after said GPS positioning means has failed to output said first positional data continuously for a predetermined period of time.
Claim 8
Dependent Claim
61 words
A navigation system according to claim 2, wherein said correcting means includes correction inhibiting means for preventing said first positional data from being corrected with said offset value the first time when said GPS positioning means outputs the first positional data after said GPS positioning means has failed to output said first positional data continuously for a predetermined period of time.
Claim 9
Dependent Claim
27 words
A navigation system according to claim 1, wherein said self-operating positioning means comprises means for outputting present positional data based on previous data by CGP positioning means.
Claim 10
Dependent Claim
27 words
A navigation system according to claim 2, wherein said self-operating positioning means comprises means for outputting present positional data based on previous data by CGP positioning means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.