Fixed range indicating system for use in a vehicle travel path indicating apparatus
US4663629A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1984 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | Jun 18, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/367
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fixed range indicating system is provided for the vehicle travel path indicating apparatus. The vehicle travel path indicating apparatus includes a locational data source having a pulse generator and producing vehicle locational data, memories for successively storing the vehicle locational data, a data reader for reading the travel path data from the memories, and a display unit for displaying a travel path of the vehicle on a display screen based on the travel path data read out by the data reader. The fixed range indicating system in such apparatus comprises a pulse counter for counting the pulses from the pulse generator, a data extractor for extracting a fraction of the locational data each time the travel distance is increased by a predetermined distance and for delivering the extracted data fraction as stored locational data to the memories to form stored travel path data, and a data restoring circuit for preparing restored travel path data based on the stored travel path data read out by the data reader from the memories and the locational data issued from the locational data source, the display means displaying the travel path of the vehicle on the display screen based o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.