RFID device for determining the operating status and identification of an electric appliance
US10229299B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 24, 2016 |
| Grant date | Mar 12, 2019 |
| Priority date | — |
| Expiry date | Jun 24, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2209/886
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A device for identifying an electrical appliance when it is powered up includes a current detector coupled to an electrical power supply cable of the electrical appliance, for detecting the passage of an electrical current in the cable and generating an electrical signal. A voltage generator converts the electrical signal at the output of the current detector into a direct voltage. An RFID circuit stores identification information, coupled to an antenna suitable for receiving and transmitting signals from and to an RFID reader. The device includes a control circuit coupled to the voltage generator and to the RFID circuit, the control circuit configured for producing a change of impedance of the antenna when the direct voltage is applied, the change of impedance allowing to transmit the identification information to the RFID reader.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.