Measuring and testing – Dynamometers – Responsive to torque
Patent
1998-10-20
2000-11-14
Noori, Max
Measuring and testing
Dynamometers
Responsive to torque
73862333, 32420721, G01L 302
Patent
active
061453870
ABSTRACT:
A magnetoelastic torque sensor for providing an output signal indicative of the torque applied to a member about an axially extending axis of the member, comprising, a first magnetoelastically active region in the member, the region being magnetically polarized in a single circumferential direction and possessing sufficient magnetic anisotropy to return the magnetization in the region, following the application of torque to the member, to the single cirumferential direction when the applied torque is reduced to zero, whereby the magnetoelastically active region produces a magnetic field varying with the torque. Magnetic field sensors are mounted proximate to the magnetoelastically active region and oriented with respect thereto to sense the magnitude of the magnetic field at the sensors and provide the output signal in response thereto. At least the magnetoelastically active region of the member is formed of a polycrystalline material wherein at least 50% of the distribution of local magnetizations lie within a 90.degree. quadrant symmetrically disposed around the single circular direction and having a coercivity sufficiently high that the field arising from the magnetoelastically active region does not magnetize regions of the member proximate to the magnetoelastically active region to give rise to parasitic magnetic fields which are of sufficient strength to destroy the usefullness, for torque sensing purposes, of the net magnetic field seen by the magnetic field sensor means.
REFERENCES:
patent: 2511178 (1950-06-01), Roters
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: 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.
patent: 5052232 (1991-10-01), Garshelis
patent: 5323659 (1994-06-01), Wakamiya et al.
patent: 5351555 (1994-10-01), Garshelis
patent: 5465627 (1995-11-01), Garshelis
patent: 5520059 (1996-05-01), Garshelis
patent: 5591925 (1997-01-01), Garshelis
patent: 5706572 (1998-01-01), Garshelis
patent: 5708216 (1998-01-01), Garshelis
Garshelis, Ivan J. and Christopher R. Conto, "A Torque Transducer Utilizing Two Oppositely Polarized Rings" IEEE Transactions On Magnetics, vol. 30, No. 6, Nov., 1994, pp. 4629-4631.
Garshelis, Ivan J. et al., "Development of Magnetoelastic Torque Transducer for Automotive Transmission Applications" SAE Paper No. 9070605.
Garshelis, Ivan J. and C.R. Conto, "A Magnetoelastic Torque Transducer Utilizing a Ring Divided Into Two Oppositely Polarized Circumferential Regions" J. Appl. Phys. 79 (8), Apr. 15, 1996, pp. 4756-4758.
Garshelis, Ivan J. et al., "A Single Transducer for Non-Contact Measurement of the Power, Torque and Speed of a Rotating Shaft" SAE Technical Paper Series 950536, Feb. 27, 1995, pp. 57-65.
Garshelis, Ivan J., Investigations of Parameters Affecting the Performance of Polarized Ring Torque Transducers, IEEE Transactions On Magnetics, vol. 29, No. 6, Nov., 1993, pp. 3201-3203.
Garshelis, Ivan J. "A Torque Transducer Utilizing a Circularly Polarized Ring" IEEE Transactions On Magnetics, vol. 28, No. 5, Sep., 1992, pp. 2202-2204.
Garshelis, Ivan J. et al., Development of a Non-Contact Torque Transducer for Electric Power Steering Systems SAE Technical Paper Series 920707, Feb. 24, 1992, pp. 173-182.
Garshelis, "A Study of the Inverse Wiedemann Effect on Circular Remanence," IEEE Trans. on Magn., MAG-10 No. 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 Massenmarkte," Elektrotechnik, Jan., 1985, Wurzburg DE, pp. 199-202.
Patent Abstracts of Japan, vol. 8, No. 97 (P-272) (1534) May 8, 1984.
Garshelis, "A Non-contact Torque Sensor Using a Shape Memory Alloy", 2244 Research Disclosure (1994) Mar., No. 359 Emsworth, GB.
Friedman, Esq Stuart J.
Magna-Lastic Devices, Inc
Noori Max
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