Device and method for characterizing a medium comprising at least a conductive part
US5549008A · kind A · utility
6Cited by
9References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1993 |
| Grant date | Aug 27, 1996 |
| Priority date | — |
| Expiry date | Dec 15, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/023
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a method and to a device for testing a partly conductive medium to determine a characteristic thereof. A signal generator generates a periodic excitation signal in a resonant circuit, including a coil which produces a magnetic field, which is coupled to the partially conductive medium. Eddy currents induced in the partially conductive medium cause the current flowing in the resonant circuit to vary. The amplitude of the envelope of the current flowing in the resonant circuit is measured and processed to determine the characteristic of the medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.