Polarametric blind spot detector with steerable beam
US6734807B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1999 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Apr 1, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2013/93274
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A blind spot detection system includes a transmitter directing a circularly polarized signal into a blind spot adjacent a vehicle. A receiver also mounted on the vehicle receives a reflection of the circularly polarized signal which is oppositely circularly polarized. An indicator indicates to the driver of the vehicle when the reflected signal is detected, thereby indicating the presence of an object in the blind spot. An indicator is also directed toward the blind spot generating a warning when the presence of an object in the blind spot is detected and an indication of a turn or lane change by the vehicle is detected, such as turn signal switch activation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.