Circularly magnetized non-contact torque sensor and method for m

Measuring and testing – Dynamometers – Responsive to torque

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

336 30, G01L 310

Patent

active

053515552

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), Kodayashi et al.
patent: 4896544 (1990-01-01), Garshelis
patent: 4899598 (1990-02-01), Gumaste et al.
Garshelis, "A Study of the Inverse Wiedemann 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 CH0964-7 MAG, 38 pages (1975).
Garshelis, "Conditions for Stress Induced Bulk Moments", J. Appl. Phys. 50(3), 1680-2 (1979).
Y. Nonomura, E. A. `Measurements Of Engine Torque With The Interbearing Torque Sensor`, SAE Technical Paper 1988, pp. 2.329-2.339.
G. Reiniger, `Halbleitersensoren fur Massenmarkte`, Elektrotechnik Jan., 1985, Wurzburg DE, pp. 199-202.
Garshelis, "A Versatile Magnetostrictive Displacement Transducer", IEEE Industrial Electronics Control Instrumentation Conference, 76 CH1 117-1 IECI, 99-105 (1976).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Circularly magnetized non-contact torque sensor and method for m does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circularly magnetized non-contact torque sensor and method for m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circularly magnetized non-contact torque sensor and method for m will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-573937

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.