Patent · US Expired

Method for extending the measuring range of an absolute angle in magnetic-field sensors

US6622388B2 · kind B2 · utility

3Cited by

5References

10Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Marcus Meyer · Waldbronn, DE
Markus Kliffken · Laufenburg (Baden), DE
Holger Thoelke · Sasbach, DE

Key dates

Filing date	Apr 26, 2002
Grant date	Sep 23, 2003
Priority date	—
Expiry date	Apr 26, 2022

Classification

Technology area (CPC G)Physics
CPC primaryG01D5/24409
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention relates to a method for expanding the absolute angle measurement range in magnetic field sensors. Through the use of an evaluation circuit (12), various method steps are carried out; first, the ratio of two phase-shifted input values is determined, for example sine signals or cosine signals of the voltage (2, 3). The ratio of the phase-shifted input values (2, 3) to each other is combined with an offset C. The predeterminable offset C permits the expansion (9) of the angle measurement range of magnetic field sensors to a full 360° rotation (11) or a multiple thereof.

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