Vehicle bearing detection and data processing methods applicable to vehicle navigation system
US4890233A · kind A · utility
180Cited by
13References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1987 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Oct 27, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B29/106
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention provides various methods for detecting the bearing of a moving vehicle and of processing data in a vehicular navigation system. Provided there is carried out a process of recognizing the present position of the vehicle while the vehicle is moving at a predetermined speed, bearing data obtained from a prestored map is utilized to determine the present position of the vehicle. At that time, the data output from a terrestrial magnetism sensor, which would otherwise be used, is discarded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.