Embeddable moisture sensor, measurement device and method of use thereof
US8542025B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Oct 14, 2009 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Sep 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed herein is a method of interrogating a resonant circuit that includes embedding a resonant circuit into a material, wherein a dielectric of a capacitor of the resonant circuit is the material. The method includes remotely determining the resonant frequency of the electrical circuit with a measurement device, wherein the determining is accomplished automatically. Finally, the method includes remotely automatically determining at least one of an estimated or precise resistance of the resonant circuit, an estimated or precise quality factor of the resonant circuit, and an estimated or precise voltage ratio of the resonant circuit, wherein the voltage ratio is a ratio of a voltage of the energy absorbed by the receiver at resonance and a voltage of the energy absorbed by the receiver at a fixed frequency shift from resonance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.