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Method and apparatus for continuous sectional magnetic encoding to measure torque on large shafts | Verfahren und Vorrichtung zur kontinuierlichen sektionalen magnetischen Codierung zur Messung des Drehmoments an großen Wellen | Procédé et appareil de codage magnétique sectionnel continu pour mesurer le couple sur de grands arbres

Patentnummer:EP2447675B1
IPC Hauptklasse:G01D0005245
Anmelder:
Erfinder:
Anmeldung:26.10.11
Offenlegung:28.10.10
Patenterteilung:18.03.20

Abstract / Hauptanspruch
Magnetically encoded shafts for use in detecting forces exerted on the shaft during operation. Magnetically encoded regions, arranged in tracks or bands, encircle the shaft (271) and are formed within or affixed to the shaft (271). The magnetically encoded regions (272) define force-sensitive regions there between. Magnetic fields surround the force-sensitive regions (272) and are altered by force vectors passing through the force sensitive region. These magnetic fields are sensed by magnetic field sensors to determine various shaft (271) parameters including, for example: shaft (271) rotational speed, shaft (271) rotational position, and forces exerted on the shaft (271), e.g., torque, bending forces, stress forces and strain forces. To provide continuous detection of shaft (271) operational parameters and forces, dead zones between magnetically encoded regions (272) (272) are aligned with force sensitive region (509)s associated with magnetically encoded regions (272) in other bands.

EP2447675B1


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