Virtual walls in infrared based RTLS systems
US8018584B1 · kind B1 · utility
19Cited by
3References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 17, 2008 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | Mar 26, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2201/01
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and systems for locating a portable device in an enclosure having a location defining a virtual wall are provided. The system includes first and second infrared (IR) transmitters directed to opposite sides of the virtual wall. Each of the transmitters is configured to selectively transmit an interfering IR signal (IIS) and a data signal including a corresponding transmitter location ID.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.