Sensor system method and apparatus for discrimination of metallic objects based on a variation in self inductance
US5028870A · kind A · utility
10Cited by
21References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1989 |
| Grant date | Jul 2, 1991 |
| Priority date | — |
| Expiry date | Apr 18, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/102
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for discriminating metal in an object is provided including a sense coil and related circuitry, with variations in the self inductance of the sense coil being measured as the object is passed substantially through the center of the coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.