Self-locating devices via highly directional RFID tags in controlled location
US7295132B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 2004 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | Oct 13, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A monitored area is provided multiple RFID tags placed at defined coordinates/locations throughout the extended area. These RFID tags respond to receipt of a RF signal by transmitting/broadcasting their unique identifier (ID) within the specific area in which the tag is located. A device, whose location within the monitored area is desired, is equipped with an RFID interrogating device, such as an RF transceiver, which periodically broadcasts RF interrogation signals. The multiple RFID tags are positioned at specific areas within the environment to allow the RF interrogating device to (1) receive the RFID signal and (2) utilized the received data to independently determine the device's location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.