Inductive displacement sensor with short-circuit ring of non-ferrous material
US5994895A · kind A · utility
8Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1997 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Jun 19, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2007/1684
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inductive displacement sensor comprises a magnetically conductive housing, a coil located within the conductive housing, and a solenoid plunger movable within the coil. A ring-shaped air gap is formed between the solenoid plunger and the conductive housing. A short-circuit ring surrounds the solenoid plunger and is located on the outside of the conductive housing and in front of the ring-shaped air gap. An electronic unit is connected to the coil that measures the displacement-dependent inductance of the coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.