Magnetic device for detecting angle of rotation

US5625289A · kind A · utility

Assignee

• Deutsche Automobilgesellschaft mbH · DE

Inventors

• Michael Daetz · Wolfsburg, DE
• Roger Pohlmann · Braunschweig, DE

Key dates

• Filing date: Sep 26, 1994
• Grant date: Apr 29, 1997
• Expiry date: Sep 26, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/20018
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

For detecting the angle of rotation of a shaft, in particular of a gear shift shaft in a gear change box for a motor vehicle, a device is proposed in which a carrier arrangement carries a magnet and in its proximity magnetically sensitive sensors. A screening device, rigidly attached to the shaft, moves in the intermediate space between the magnet and the sensors. This screening device is made from a ferromagnetic material such that the magnetic field permeating the sensors is influenced in a manner whereby the sensors generate a signal that unambiguously identifies the position of the shaft.