Hall sensor—magnet geometry for large stroke linear position sensing
US11946775B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2021 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Jul 26, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/1292
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Position sensing units, comprising a magnetic assembly (MA) having a width W measured along a first direction and a height H measured along a second direction and including at least three magnets having respective magnetic polarizations that define along the first direction at least a left MA domain, a middle MA domain and a right MA domain, wherein the magnetic polarizations of each MA domain are different, and a magnetic flux measuring device (MFMD) for measuring a magnetic flux B, wherein the MA moves relative to the MFMD along the first direction within a stroke L that fulfils 1 mm≤L≤100 mm, stroke L beginning at a first point x0 and ending at a final point xmax, and wherein a minimum value Dmin of an orthogonal distance D, measured along the second direction between a particular MA domain and the MFMD, fulfills L/Dmin>10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.