Magnetic coupling for electrical conductivity assessment
US9753072B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2014 |
| Grant date | Sep 5, 2017 |
| Priority date | — |
| Expiry date | Aug 2, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is provided that includes setting up a composite material structure under test (SUT) between a transmit coil and a receive coil. The transmit coil is driven with a RF signal over a plurality of frequencies, thereby causing the transmit coil to produce a magnetic field that by magnetic coupling through the SUT induces a voltage in the receive coil. The voltage in the receive coil is measured, and from the voltage, a measurement of attenuation of the RF signal caused by the SUT between the transmit coil and receive coil is produced. And an effective conductivity of the SUT is calculated from the measurement of attenuation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.