Apparatus for navigating vehicle
US5046011A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1989 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Jun 30, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a navigation apparatus for showing a driver the current position of his vehicle by estimating the vehicle position on the basis of the travel direction and travel distance thereof and matching the current vehicle position thus estimated to map information stored previously. The apparatus disclosed is capable of navigating a vehicle with accuracy even if it is traveling on a road which is not stored in memory; in that case, the apparatus repeats comparison of the vehicle travel direction with the directions in which lie the current vehicle position and respective nodes stored in memory, and accumulates the comparison results so as to infer the arrival of the vehicle at its destination which corresponds to one of the nodes stored in memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.