Variable-reluctance position sensor
US7906959B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2003 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | Oct 7, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D2205/777
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A variable reluctance analog position device designed to determine the position variation of a target made from a ferromagnetic material. The device includes at least one magnet, the target and the magnet defining a gap therebetween. A magnetosensitive element detects induction variation produced in the gap by relative movement of the target relative to the magnet. The magnet is magnetized in a direction essentially perpendicular to the front surface of the magnet, which defines one edge of the gap. The magnet includes a cavity open at the front surface thereof and the magnetosensitive element is housed in the cavity. Moreover, the target is provided with a specific geometric configuration determined such that the induction variation according to the position of the target corresponds to a pre-defined function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.