Magnetostrictive torque sensor and electrically powered...

Details Magnetostrictive torque sensor and electrically powered... Magnetostrictive torque sensor and electrically powered...

2006-10-04

2009-06-02

Noori, Max (Department: 2855)

Measuring and testing

Dynamometers

Responsive to torque

Reexamination Certificate

active

07540204

ABSTRACT:
A magnetostrictive torque sensor includes a rotating shaft that is rotated by an applied torque, magnetostrictive films formed around the entire circumferential periphery of a surface of the rotating shaft in at least one location, sensor coils for sensing a change in impedance of the magnetostrictive films, and a torque calculation unit for calculating the torque applied to the rotating shaft on the basis of a signal relating to the change in impedance outputted from the sensor coils. In this magnetostrictive torque sensor, a width of the magnetostrictive films in the axial direction of the rotating shaft and a width of the sensor coils in the axial direction of the rotating shaft are set so as to fulfill the relationship 1<(W1/W2)<1.35.

REFERENCES:
patent: 4765425 (1988-08-01), Saito et al.
patent: 4907460 (1990-03-01), Taniguchi et al.
patent: 5280729 (1994-01-01), Aoki et al.
patent: 6422095 (2002-07-01), Shimizu et al.
patent: 2004/0226384 (2004-11-01), Shimizu et al.
patent: 2006/0042404 (2006-03-01), Shimizu et al.
patent: 2002-082000 (2002-03-01), None

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