Traffic surveillance radar using ranging for accurate target identification
US6798374B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 2002 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Dec 6, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/87
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a Doppler shifted radar apparatus for correct target identification with respect to surveillance of moving vehicles. More particularly, an improved radar detection system using two or more continuously transmitted frequencies is used. The multiple frequencies are directed toward target vehicles whereby the phase difference of the two or more reflected Doppler signals is calculated and subsequently used to accurately determine a target range, thereby displaying the closest vehicle and closest vehicle speed. Vehicle speed is determined with use of the standard Doppler frequency shift. The next closest and/or next faster vehicle speed can also be easily determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.