Inductive angle-of-rotation sensor having rotatable magnetically conductive element within single winding coil

US5867022A · kind A · utility

Assignee

• WABCO GmbH · DE

Inventors

• Gerd Eden · Norden, DE
• Horst Heinrich · Stuttgart, DE
• Stefan Groetzinger · Gehrden, DE

Key dates

• Filing date: Mar 20, 1997
• Grant date: Feb 2, 1999
• Expiry date: Mar 20, 2017

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B7/30
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An angle-of-rotation sensor comprises a coil, a magnetically conductive element within the coil which is rotatable around an axis of rotation, the axis of rotation of the magnetically conductive element being at least partially within the coil, and a single winding for the coil. The angle-of-rotation of the magnetically conductive element is determined by measuring the change in self-inductance in the coil when the magnetically conductive element is caused to rotate.