Radio frequency identification tag for transmitting temperature data and method therefor
US7268685B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2005 |
| Grant date | Sep 11, 2007 |
| Priority date | — |
| Expiry date | Feb 23, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A radio frequency identification tag, used in a radio frequency identification system, includes an antenna unit for receiving an external magnetic wave to generate an induced current; a driving voltage generating unit for converting the induced current into a constant voltage and outputting the constant voltage; and a state detecting unit for detecting information about a change in an operational state of the driving voltage generating unit. The tag further includes a memory for storing temperature data corresponding to the information about the change in the operational state and data needed for identification; and a controlling unit for reading out, from the memory, the temperature data dependent on the information about the change in the operational state detected by the state detecting unit and the identification data. The read temperature and identification data are transmitted via an antenna unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.