Generation of zero-level fluctuation and its reduction in the magnetic head type torque sensor with L-R bridge configuration

Author

Sasada, I. ; Baba, M. ; Harada, K.

Author_Institution

Dept. of Mater. Sci. & Eng., MIT, Cambridge, MA, USA

Volume

25

Issue

5

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

3417

Lastpage

3419

Abstract

A theory is presented to describe the behavior of extrinsic zero-level fluctuations (ZLFs) for the magnetic-head-type torque sensor with L-R bridge configuration. A method for suppressing the extrinsic ZLF is derived from the theory. The method is demonstrated using an as-ground carbon steel (S45C in JIS) shaft of 12-mm diameter. It is found that the relationship between unbalances in the magnetic pickup and the generation of the external ZLF is well described by the theory. By combining the method for suppressing the extrinsic ZLF and surface processing of the shaft to reduce inhomogeneities, torque sensors for various control applications can be realized

Keywords

bridge circuits; electric sensing devices; magnetic heads; magnetic variables measurement; torque measurement; JIS steel; L-R bridge configuration; S45C steel; as-ground C steel; extrinsic zero-level fluctuations; magnetic pickup; magnetic-head-type torque sensor; surface processing; Bridge circuits; Fluctuations; Magnetic heads; Magnetic sensors; Magnetostriction; Mechanical sensors; Permeability; Sensor phenomena and characterization; Shafts; Torque;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.42320

Filename

42320