Process for determining the total pitch deviation of a position sensor

US11460291B2 · kind B2 · utility

Assignee

• AKTIEBOLAGET SKF · SE

Inventors

• Susanne Blokland · Torino, IT
• Salah-Eddine Douih · Le Pont aux Oies, FR
• Mathieu Hubert · Torino, IT
• Simon Hubert · Saint-Cyr-sur-Loire, FR
• Benedicte Thomas · La Baudinière, FR
• Charlotte Vu · La Mulocherie, FR

Key dates

• Filing date: Nov 25, 2020
• Grant date: Oct 4, 2022
• Expiry date: Jan 12, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D5/2448
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A process for determining the total pitch deviation of a position sensor fitted with a magnetic disk and a magnetic detector, the magnetic disk comprising pairs of magnetic poles, the process includes recording, over one mechanical turn, an angular signal of the magnetic intensity measured by the magnetic detector as a function of the angle of rotation of the magnetic disk, determining zero-crossing positions based on the angular signal recorded and the number of zero-crossing position determined, determining the pole pair lengths based on the zero-crossing positions, and determining the total pitch deviation based on the pole pair lengths.