Method and system for rangefinding using RFID and virtual triangulation
US7822424B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2004 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Aug 22, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/87
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wireless system (20) and method for determining the location of a fixed or mobile target (31, 32, 33 . . . ) configured to have a transponder (31, 64) on the target (31, 32, 33 . . . ), a transceiver (21, 44) monitoring the target location, communicating between the transponder (31, 64) and transceiver (21, 44), and a processor (40) for finding the target by virtual triangulation based on values of received position information. The processor (40) is configured to determine virtual triangulation based on successive values of the position information using at least three points (P1, P2 and P3) of the transponder (31) respective of the transceiver (21). The present invention discloses methods for finding with virtual triangulation by: (a) finding with virtual triangulation by generating position information in real-time, in the case of (i) stationary and moving target, and or (ii) in the case of the presence of obstacles; (b) finding with virtual triangulation relating to the average speed of the motion of operator; and or (c) finding with simplified virtual triangulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.