Eddy current sensor
US3932813A · kind A · utility
75Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 28, 1974 |
| Grant date | Jan 13, 1976 |
| Priority date | — |
| Expiry date | Mar 28, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/028
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An E-shaped magnetic core with a sensing coil wound around each outer leg, these coils being connected in series and the center leg made of a magnet to establish a symmetrical magnetic field. When a conductive but non-magnetic material is passed through the flux field established in the air gap between the center and outer legs, eddy currents are induced in the material which oppose and momentarily change the magnetic field inducing a detectable voltage in the coils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.