Apparatus for visually indicating the current location of an automotive vehicle
US4517565A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1982 |
| Grant date | May 14, 1985 |
| Priority date | — |
| Expiry date | Aug 16, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A current location indicating apparatus for use in an automotive vehicle wherein a current location of the automotive vehicle is arithmetically obtained in terms of two-dimensional coordinates by a signal processing unit on the basis of the output from a distance detecting unit and the output from a bearing detecting unit, and the current location of the vehicle is visually indicated on the screen of a display from the thus-obtained data in connection with the current location thereof. The apparatus comprises, in operative combination, two different types of bearing detecting units, one being of a rate gyroscope type and the other being of an earth magnetism sensor type, and a bearing signal switching unit providing a selective switching function of the outputs from the two types of bearing detecting units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.