Analysis of characteristics of a magnetostrictive torque sensor with helical knurls

Author

Ishino, Renshiro ; Sunahata, Mutsumi ; Takada, Shiro ; Takemoto, Yoshikazu

Author_Institution

Technol. Dev., Kubota Corp., Hyogo, Japan

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

3306

Lastpage

3308

Abstract

A torque sensor based on a pair of symmetrical helical knurls is described. Operation is based on the distinctive anisotropy and separation of principal stresses attributable to knurl shape and helix angle. This is made clear by finite-element method analysis. Maximum sensitivity is found for knurls having ±45° helix angles. A model for the output signal as a function of applied torque is developed based on the uniaxial anisotropy associated with the knurl shape and the stress anisotropy arising with the torque.

Keywords

finite element analysis; magnetic anisotropy; magnetic sensors; magnetostrictive devices; spontaneous magnetisation; torque measurement; finite-element method analysis; helical knurls; helix angle; knurl shape; magnetostrictive torque sensor; maximum sensitivity; output signal model; principal stress anisotropy; principal stress separation; spontaneous magnetizations; stress anisotropy; uniaxial magnetic anisotropy; Anisotropic magnetoresistance; Magnetic analysis; Magnetic anisotropy; Magnetic sensors; Magnetostriction; Perpendicular magnetic anisotropy; Sensor phenomena and characterization; Shape; Stress; Torque;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.802298

Filename

1042533