Radar device
US6140954A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1999 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Jan 26, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2013/9324
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A radar device for detecting distances and relative speeds of obstructions such as preceding vehicles has a stationary object identifier for identifying stationary objects such as roadside guard rails and the like and a stationary object eliminator for eliminating data identified as pertaining to such stationary objects. The stationary object identifier detects peak densities in a beat spectrum detected as a difference between transmitted and received frequencies of a radar beam modulated to rise and fall in frequency periodically and identifies peak groups having peak densities above a predetermined value as stationary objects. Therefore, it is possible to detect a stationary roadside object on the basis of peak densities. The stationary object eliminator eliminates data of peak groups identified as stationary objects by the stationary object identifier and thereby removes them as objects of combination processing for pairing rise side beat frequencies with fall side beat frequencies. As a result the amount of processing required for this pairing is reduced and the occurrence of wrong pairings is reduced and it is possible to eliminate the unnecessary calculation of distances and …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.