Magnetic-based transducer for measuring displacement
US6810754B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 2003 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Feb 24, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L3/105
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A transducer for measuring displacement comprises a transducer assembly in which there is a coil wound about an axis and energisable to generate a magnetic field, and first and second magnetic field sensor devices, that are axially spaced with the coil therebetween, each device being in proximity to the coil to respond to a magnetic field component generated by energisation of the coil. A ferromagnetic member is disposed to interact with the field generated by the coil, the ferromagnetic member and the transducer assembly being mounted for relative displacement in the direction of said axis, such that the balance of the respective field components sensed by the first and second sensor devices is a function of the axial position of the ferromagnetic member relative to the transducer assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.