Title:
FIELD NAVIGATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/1995/018432
Kind Code:
A1
Abstract:
A location system (10) for a vehicle moving within an area (52) comprising: a heading sensor (12); a speed sensor (20, 24); a storage device (18) for storing initial position data representing a navigation checkpoint location; a database (34) for storing records each include geographic information data representing selected aspects of the area; a processor (18) for estimating a current position signal based on heading signal values, speed signal (26) values, initial position signal values, and previous current-position signal values, wherein the current position signal values correspond to records stored in the database; a correction device for selectively correcting the current position signal based on selected position inputs which indicate an approximate vehicle position relative to the navigation checkpoint location; and an alerting device for indicating the vehicle has reached a selected region within the area based on the current position signal and the geographic information data.
Inventors:
ANDERSON NOEL W
Application Number:
PCT/US1994/014440
Publication Date:
July 06, 1995
Filing Date:
December 30, 1994
Export Citation:
Assignee:
CONCORD INC (US)
International Classes:
G01C21/00; G01S5/14; G01S11/10; G01S19/14; G01S19/23; (IPC1-7): G08G1/123; G01S3/02; G11B5/00; G01C21/00
Foreign References:
| US5189430A | 1993-02-23 | |||
| US4496996A | 1985-01-29 | |||
| US4731613A | 1988-03-15 | |||
| US3789198A | 1974-01-29 | |||
| US5075693A | 1991-12-24 | |||
| US4743913A | 1988-05-10 | |||
| US4949268A | 1990-08-14 |
Other References:
ASAE (AMERICAN SOCIETY OF AGRICULTURAL ENGINEERS) Publication, "Automated Agriculture for the 21 St Century", (R.J. PALMER), 16-17 December 1991, PAGES 403-408.
ASAE (AMERICAN SOCIETY OF AGRICULTURAL ENGINEERS) Publication, "Automated Agriculture for the 21St Century", J.V. STAFFORD et al., 16-17 December 1991, pages 356-365.
ASAE (AMERICAN SOCIETY OF AGRICULTURAL ENGINEERS) Publication, "Automated Agriculture for the 21St Century", J.V. STAFFORD et al., 16-17 December 1991, pages 356-365.
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