Method of determining position on a magnetic track of an encoder
US9383226B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2014 |
| Grant date | Jul 5, 2016 |
| Priority date | — |
| Expiry date | Sep 12, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D2205/85
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of determining a position on a magnetic track of an encoder includes providing a group of magnetic pole pairs that forms a portion of the magnetic track, recording a relative position within a first magnetic pole pair in the group using a first magnetic sensor proximate a high-resolution portion of the magnetic track, detecting adjacent pole junctions within the group of magnetic pole pairs with a second magnetic sensor positioned proximate a reference portion of the magnetic track, correlating the adjacent pole junctions with the first magnetic pole pair to determine a relative position of the first magnetic pole pair within the group, and calculating a local absolute position within the group using the relative position within the first magnetic pole pair and the relative position of the first magnetic pole pair within the group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.