Calibratable multidimensional magnetic point sensor

US8203329B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Hans-Peter Hohe · Heiligenstadt, DE
• Michael Hackner · Erbach, DE
• Markus Stahl-Offergeld · Erlangen, DE

Key dates

• Filing date: Aug 19, 2008
• Grant date: Jun 19, 2012
• Expiry date: Aug 31, 2028

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/075
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A calibratable magnetic field sensor for sensing a first and a second spatial component of a magnetic field in a reference point, wherein the magnetic field includes a first and a second measurement field component and/or a first and a second calibration field component. The magnetic filed sensor includes a first sensor element arrangement including at least a first and a second sensor element for sensing the first magnetic field component, which includes a first measurement field component and/or a first calibration field component, with respect to a first spatial axis in the reference point. Furthermore, the magnetic field sensor includes a second sensor element arrangement for sensing the second magnetic field component, which includes a second measurement field component and/or a second calibration field component, with respect to a second spatial axis in the reference point. The magnetic filed sensor also includes an excitation line arranged with respect to the first sensor element arrangement so that, when impressing a default current into the excitation line, a pair of different asymmetrical default calibration field components in the first sensor element and in the second s…