Selective slope linear position sensor
US9638547B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 2012 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | Aug 17, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/145
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A three-magnet assembly configured for use in a position sensing system is disclosed. In an example, the three-magnet assembly establishes a non-linear spatially varying magnetic field configured to be measured by a magnetic field measurement device so that resolvable measurements are spatially distributed in a non-linear fashion. The resolvable measurements are distributed to a relatively higher concentration in at least one first region along a measurement stroke and to a relatively lower concentration in at least one second region along a measurement stroke, the second region being different from the first region. In an example, the different concentrations of resolvable measurements are utilized to spatially vary the precision of a position sensor along a measurement stroke. A system and methods for correlating magnetic field measurements to expected positions are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.