Patent · US Expired

Angle of rotation sensor with an asymmetrically positioned permanent magnet

US6448761B1 · kind B1 · utility

9Cited by

5References

20Claims

0Family size

Assignee

VALEO SCHALTER UND SENSOREN GMBH · DE

Inventors

Reinhard Stumpe · Bad Liebenzell, DE
Anton Grabmaier · Bietigheim-Bissingen, DE
Martin Osterfeld · Bietigheim-Bissingen, DE

Key dates

Filing date	Dec 21, 1999
Grant date	Sep 10, 2002
Priority date	—
Expiry date	Dec 21, 2019

Classification

Technology area (CPC G)Physics
CPC primaryG01D2205/73
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention pertains to an angle of rotation sensor, wherein a magnet that is arranged such that it can be turned relative to a sensor that is sensitive to magnetic fields is coupled with a rotatable body, the angle of rotation (&agr;) of which needs to be measured. The invention aims to significantly broaden the measuring range of such an angle of rotation sensor. The invention proposes to utilize an asymmetric magnetic field such that the maximum and the minimum of the magnetic field measured by the probe are spaced apart by an angular range in excess of 270°. Advantageous additional developments pertain to other options for adapting the magnetic field to the desired shape. These options include an air gap that changes over the angle of rotation and the utilization of asymmetric pole shoes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.