Passive sensor tag system
US10740577B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2016 |
| Grant date | Aug 11, 2020 |
| Priority date | — |
| Expiry date | Jan 3, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10336
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A passive sensor tag system including a passive electronic sensor tag and an external readout. The passive electronic sensor tag including a sensor element configured to sense data in a local environment and to cause a shift in a fundamental electrical resonance frequency characteristic of a sensor circuit based on the sensed data. The external readout including an external readout circuit that is configured to generate a signal having a frequency and a voltage and to transmit the signal through an output antenna. The transmitted signal coupling the sensor circuit and the external readout circuit. The external readout determining a fundamental electrical resonance frequency characteristic of the sensor circuit based on the impedance of the coupled sensor circuit and external readout circuit. The external readout determining the sensed data based the fundamental electrical resonance frequency characteristic of the sensor circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.