Circularly magnetized non-contact power sensor and method for me

Measuring and testing – Dynamometers – Responsive to torque

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

73862333, 32420713, G01L 302

Patent

active

055919251

ABSTRACT:
A power sensor for providing an output signal indicative of the power transmitted by a rotating torqued member comprises a magnetoelastically active element for producing a magnetic field varying with the applied torque and a field modulating means for modulating the magnetic field in a periodic manner which is indicative of the speed of member rotation. A magnetic field vector sensor in the form of a coil senses the amplitude of the time rate of change of the modulated field for providing an output signal which is linearly indicative of the power transmitted by the rotating member. The field modulating means preferably comprises at least one ring having some uniformly spaced salient feature, such as gear-like teeth, around the periphery thereof. In one embodiment, the magnetoelastically active element 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. In another embodiment, the magnetoelastically active portion includes two or more axially distinct, magnetically contiguous, oppositely polarized circumferential regions.

REFERENCES:
patent: 2287796 (1942-06-01), Hall
patent: 2365073 (1944-12-01), Haight
patent: 2365565 (1944-12-01), Langer
patent: 2511178 (1950-06-01), Roters
patent: 2521905 (1950-09-01), Feller
patent: 3939448 (1976-02-01), Garshelis
patent: 4364278 (1982-12-01), Horter et al.
patent: 4523482 (1985-06-01), Barkhoudarian
patent: 4627298 (1986-12-01), Sahashi et al.
patent: 4656875 (1987-04-01), Uitermarkt
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.
patent: 5052232 (1991-10-01), Garshelis
patent: 5182953 (1993-02-01), Ellinger et al.
patent: 5386733 (1995-02-01), Hesthamar et al.
Garshelis, "A Study of the Inverse Wiedmann Effect on Circular Remanence," IEEE Trans. on Magn., MAG-10 No. 2 344-358 (1974).
Garshelis, "The Wiedmann 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), 1680-1682 (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 Massenmarkte," Elektrontechnik, Jan., 1985, Wurzburg DE, pp. 199-202.

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

Rate now

     

Profile ID: LFUS-PAI-O-1765956

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