Location detecting apparatus
US5307277A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 1992 |
| Grant date | Apr 26, 1994 |
| Priority date | — |
| Expiry date | Jun 3, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A location detecting apparatus comprising an autonomous location detecting unit mounted in a moving body to calculate a distance traveled by the moving body and an estimated heading of the moving body and to detect an estimated location of the moving body on the basis of the distance traveled and the estimated heading, a receiving unit for detecting a location of the moving body by receiving waves from satellites circling around the Earth in predetermined orbits and for providing location information corresponding to the detected location, a unit to detect a difference of location between the location detected by the receiving unit and the estimated location, a location correcting unit which corrects the estimated location to the location detected by the receiving unit when the difference of location is more than a first predetermined value, a magnetic sensor for detecting an heading of the moving body by sensing a geomagnetic field, and a heading correcting unit which corrects the estimated heading to the heading detected by the magnetic sensor, when the difference of location is more than the first predetermined value after the estimated location was corrected and before the movi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.