Patent · US Active

Magnetic field torque and/or angle sensor

US11248971B2 · kind B2 · utility

0Cited by

58References

20Claims

0Family size

Assignee

Analog Devices International Unlimited Company · IE

Inventors

Enda Joseph Nicholl · Kilmallock, IE
Jochen Schmitt · Ludwigshütte, DE

Key dates

Filing date	Jan 9, 2019
Grant date	Feb 15, 2022
Priority date	—
Expiry date	Aug 31, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG01D2205/26
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Aspects of this disclosure relate to a magnetic sensor system for measuring any desired combination of measuring torque, rotation angle, and turn count of a shaft. The shaft may include two portions connected by a torsion element. The system can measure rotation angle using a magnetic target coupled to the shaft that produces a magnetic field that varies as a function of rotation angle. The system can measure torque applied to the shaft by measuring the difference in rotation angles between the two portions of the shaft and factoring in a torsion coefficient. The system can track a turn count of the shaft using a multi-turn sensor. The magnetic sensor system may be part of an electric power assisted steering (EPAS) system.

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