Noncontact magnetic torque sensor

Author

Miyashita, Kunio ; Takahashi, Tadashi ; Kawamata, Shoichi ; Morinaga, Satoshi ; Hoshi, Yoshikzu

Author_Institution

Hitachi Ltd., Ibaraki, Japan

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1560

Lastpage

1562

Abstract

A novel noncontact magnetic torque sensor was developed which is expected to be widely used in factory automation equipment and automobiles. The sensor has two components: two magnetic drums with a torsion bar which makes the connection between the drive shaft and the load shaft, and a magnetic sensor. In order to obtain sinusoidal outputs, the magnetic sensor has multiple magnetoresistive elements with different phase angles to one other. The angles of the magnetic drums can be calculated by using sinusoidal outputs on a microcomputer. Torque can be calculated from the torsion bar angle difference. A trial torque sensor with a maximum detection torque of 200 kg-cm was manufactured. Its resolution was ±0.7% and it could be used at 120°C

Keywords

electric sensing devices; magnetostrictive devices; torquemeters; 120 degC; angle difference; drive shaft; load shaft; magnetic drums; magnetic sensor; maximum detection torque; multiple magnetoresistive elements; novel noncontact magnetic torque sensor; phase angles; sinusoidal outputs; torsion bar; Automobiles; Gears; Magnetic sensors; Magnetoresistance; Manufacturing automation; Microcomputers; Motor drives; Sensor phenomena and characterization; Shafts; Torque;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104446

Filename

104446