Self-powered RFID tag activated by a fluid
US8248249B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2012 |
| Grant date | Aug 21, 2012 |
| Priority date | — |
| Expiry date | Jan 4, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/2225
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
RFID tag and a system and method involving a plurality of RFID tags. Each RFID tag is attached to an object on which the presence of a predefined fluid is monitored. In a first state, (absence of the monitored fluid), the tag acts as a passive RFID tag, and the information it holds can be read with a proximity reader. This operation is performed when the RFID tag is attached to the object to be monitored. In a second state, whenever the monitored fluid appears on the tagged object, a fluid activated battery generates the electrical power which is used to power the RFID tag. The RFID tag then acts as an active RFID tag and starts to emit messages which can be received by a RFID reader.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.