System for determining position of an element in relation to another element using magnetic fields
US10155090B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2012 |
| Grant date | Dec 18, 2018 |
| Priority date | — |
| Expiry date | Oct 16, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D2205/22
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
System comprising a sensor assembly (3, 4, 5, 6) adapted to measure a magnetic field, and a moveable element (1) adapted to be moved relative to the sensor assembly between two positions by a combined axial and rotational movement, the rotational movement having a pre-determined relationship to the axial movement. A magnet (3) is mounted to the moveable element and configured to generate a spatial magnetic field which relative to the sensor assembly varies corresponding to both the axial and rotational movement of the magnet and thus the moveable element. A processor is configured to determine on the basis of measured values for the magnetic field an axial position of the moveable element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.