Measuring and testing – Dynamometers – Responsive to torque
Patent
1996-12-04
1999-03-30
Biegel, Ronald L.
Measuring and testing
Dynamometers
Responsive to torque
73862333, G01L 310
Patent
active
058892150
ABSTRACT:
A magnetoelastic layer is provided on a shaft for sensing torque carried by the shaft around a longitudinal axis. The layer includes first and second adjacent annular parts of a magnetically anisotropic material with circumferential easy axes. The parts are magnetically polarized in opposite circumferential directions when in a quiescent state, but produce helical magnetic fields with respective axial components when torque is carried by the shaft. First and second magnetic-field-guiding structures combine to provide shielding of the magnetoelastic layer from ambient external magnetic fields and to maximize coupling of the axial components from the magnetoelastic layer to one or more magnetic field detectors.
REFERENCES:
patent: 5386733 (1995-02-01), Hesthamar et al.
patent: 5465627 (1995-11-01), Garshelis
patent: 5520059 (1996-05-01), Garshelis
Lacheisserie, "Magnetostriction Theory and Applications of Magnetoelasticity", pp. 366-367, 393-395.
I. Sasada et al, "Torque Transducers With Stress-Sensitive Amorphous Ribbons of Chevron-Pattern", IEEE Trans. on Magnetics, vol. MAG-20, No. 5, Sep. 1984, pp. 951-953.
I. Sasada et al, "Noncontact Torque Sensors Using Magnetic Heads and a Magnetostrictive Layor on the Shaft Surface--Application of Plasma Jet Spraying Process", IEEE Trans. on Magnetics, vol. MAG-22, No. 5, Sep. 1986, pp. 406-408.
I.J. Garshelis et al, "A Torque Transducer Utilizing Two Oppositely Polarized Rings", Apr. 4, 1994.
I.J. Garshielis et al, "A Magnetoelastic Torque Transducer Utilizing A Ring Divided Into Two Oppositely Polarized Circumferential Regions", MMM 1995, Paper No. BB-08; pp. 1-9.
I.J. Garshelis, "A Torque Transducer Utilizing A circularly Polarized Ring", IEEE Trans. on Magnetics, vol. 28, No. 5, Sep. 1992, pp. 2202-2204.
I.J. Garshelis et al, Development of a Non-contact Torque Transducer for Electric Power Steering Systems, SAE Tech. Paper Series, Sensors and Actuators 1992, pp. 173-182.
I.J. Garshelis et al, "Investigations of Parameters Affecting the Performance of Polarized Ring", IEEE Transactions on Magnetics, vol. 29, No. 6, Nov. 1993, pp. 3201-3203.
Bossoli Jon William
Kilmartin Brian David
Biegel Ronald L.
Kraus Robert J.
Philips Electronics North America Corporation
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