Metal working – Method of mechanical manufacture – Electrical device making
Patent
1995-06-07
1998-01-13
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
73862335, G01L 310
Patent
active
057065721
ABSTRACT:
A torque sensor comprises a magnetoelastically active element, and a magnetic sensor, such as a Hall effect sensor, responsive to the field of the magnetoelastically active portion. In the preferred embodiment, the magnetoelastically active portion comprises a ring of material endowed with an effective uniaxial magnetic anisotropy such that the circumferential direction is the easy axis, and magnetically polarized in a substantially circumferential direction. The ring is attached to the torqued member, such as a rotating shaft, so that application of a torque to the shaft is transmitted to the ring. The torque on the ring reorients the circumferential magnetic orientation of the ring, producing a helical magnetic orientation having both circumferential and axial components. A magnetic field vector sensor is mounted on a flux collector in a fixed position relative to the ring and oriented so that it responds to the field arising from the axial component of the magnetization within the ring. The output of the sensor is thus proportional to the change in orientation of the magnetization resulting from torque applied to the shaft and transmitted to the ring.
REFERENCES:
patent: 2511178 (1950-06-01), Roters
patent: 3939448 (1976-02-01), Garshelis
patent: 4627298 (1986-12-01), Sahashi et al.
patent: 4760745 (1988-08-01), Garshelis
patent: 4805466 (1989-02-01), Schiessle et al.
patent: 4882936 (1989-11-01), Garshelis
patent: 4891992 (1990-01-01), Kobayashi et al.
patent: 4896544 (1990-01-01), Garshelis
patent: 4899598 (1990-02-01), Gumaste et al.
Garshelis, "A Study of the Inverse Wiedeman Effect on Circular Remanence, " IEEE Trans. on Magn., MAG-10 No. 2 344-58 (1974).
Garshelis, "The Wiedemann Effects and Applications, " IEEE Applied Magnetics Conference, 75 CHO964-7 MAG, 38 pages (1975).
Garshelis, "Conditions for Stress Induced Bulk Moments, " J. Appl. Phys. 50(3), 1680-2 (1979).
Garshelis, "A Versatile Magnetostrictive Displacement Transducer, " IEEE Industrial Electronics Control Instrumentation Conference, 76 CH1 117-1 IECI, 99-105 (1976).
Y. Nonomura, E.A., "Measurements of Engine Torque with the Inter-Bearing Torque Sensor, " SAE Technical Paper 1988, pp. 2.329-2.339.
G. Reiniger, "Halbleitersensoren Fur Massemarkte, " Elektrotechnik, Jan., 1985, Wurzburg DE, pp. 199-202.
Friedman Stuart J.
Hall Carl E.
Magnetoelastic Devices, Inc.
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