Method and device for assisting terrestrial vehicle traffic
US5070334A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1990 |
| Grant date | Dec 3, 1991 |
| Priority date | — |
| Expiry date | Mar 8, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/84
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for assisting terrestrial vehicle traffic involves equipping at least some vehicles with a radar system and a transponder capable of re-transmitting with selected frequency transposition any radar wave received within a predetermined frequency band. The radar system semi-continuously transmits the waves capable of measuring a distance over a range of several hundreds of meter, and the radar system receives the transposed echoes in order to carry out distance measurement thereon. It is also possible to provide certain bodies, not equipped with radar, with individual transponders which are different from those provided on vehicles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.