Radar for the detection of obstacles, especially for automobile vehicles
US5923284A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1997 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Dec 19, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2013/93271
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a radar for the detection of obstacles. The radar uses at least four frequencies referenced F.sub.1, F.sub.2, F.sub.3, F.sub.4 such that: EQU F.sub.1 -F.sub.3 =F.sub.2 -F.sub.4 and such that: (F.sub.1 +F.sub.3)-(F.sub.2 +F.sub.4)=Cte where Cte represents a constant frequency value, the measurement of distance from the target being done on the basis of the difference in phase between two signals of which the first (r.sub.1 (t)-r.sub.3 (t)) is constituted by the difference between two received signals corresponding respectively to the frequencies F.sub.1 and F.sub.3 and the second (r.sub.2 (t)-r.sub.4 (t)) is constituted by the difference between two received signals corresponding respectively to the frequencies F.sub.2 and F.sub.4. Application in particular to automobile speed control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.