System for determining at least one rotation parameter of a rotary member
US10775196B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2019 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Apr 12, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/24438
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a system comprising: an encoder the magnetic track of which has an alternation of North and South magnetic poles separated by transitions in Archimedean spiral, a rotation sensor able to detect the periodic magnetic field emitted by the encoder using a plurality of magnetic sensitive elements, distributed angularly along the magnetic track. Each magnetic sensitive element delivers a signal representative to the rotation of the encoder. The sensor further comprises a device for subtracting the signals (V1, V2) delivered by two sensitive elements forming therebetween an angle γ that is such that: 0.55π<γ·Npp, <0.83π, modulo 2π or 1.17π<γ·Npp<1.45π, modulo 2π.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.