Method for the discriminating of obstacles by means of radar, and applications
US5420591A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1993 |
| Grant date | May 30, 1995 |
| Priority date | — |
| Expiry date | Jun 16, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a method for the discriminating of obstacles by means of a radar, and its different applications to the measurement of a liquid in a tank or vessel, or again to the elimination of unwanted or parasitic echos coming notably from the ground, for radars mounted on vehicles or controlling vehicle traffic. To implement the method, the obstacle to be discriminated must have a substantially plane surface. The disclosed method then consists in successively transmitting substantially plane waves at slightly different angular frequencies .omega..sub.i, each wave being furthermore sent with two different polarizations p and p' chosen in such a way that these different coefficients of reflection on the obstacles according to the incidence of the waves give a criterion of discrimination. The processing at reception depends on the use (measurement of distance, elimination of parasitic echos etc.). The main promising feature of the invention lies in the fact that it is possible to make very precise measurements without placing excessive constraints on the transmission pattern of the radar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.