Inductance-type displacement sensor for eliminating inaccuracies due to external magnetic fields
US5194805A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 26, 1990 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Dec 26, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2208
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An inductance-type displacement sensor which can measure the displacement of a measured object of magnetic material without any contact with the object. A pair of series connected coils is provided adjacent to the object so that the inductance of the coils varies in response to a displacement of the object from a predetermined position. The inductance, the number of windings, the direction of the windings and the section of each of the cores are so set that the magnetic flux produced by one of the coils runs in a direction opposite to that of the magnetic flux produced by the other coil and the densities of the respective magnetic fluxes are identical with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.