Method and device for measuring currents or magnetic fields using hall sensors and their offset-corrected measurement values

US9983235B2 · kind B2 · utility

Assignee

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

Inventors

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

Key dates

• Filing date: Feb 26, 2013
• Grant date: May 29, 2018
• Expiry date: Apr 18, 2034

Classification

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

Abstract

The present invention relates to a method and a device for measuring currents or magnetic fields using at least one Hall sensor, which is operated with spinning current technology. In addition to first sample values for calculating a spinning current measurement value (6), second sample values are formed from the digitally converted sensor signals (1) of the Hall sensor in the method. The second sample values are formed over shorter periods of time (9) and are corrected with an offset, which is calculated from the spinning current measurement value (6) and the first sample values. In addition to the precise spinning current measurement value (6), fast offset-corrected measurement values (10) of the magnetic field or current are obtained using the method and the associated device, without elaborate calibration or additional analog circuitry expenses.