Magnetoelastic force/pressure sensor

Details Magnetoelastic force/pressure sensor Magnetoelastic force/pressure sensor

1983-10-27

1985-12-31

Hart, Charles

Measuring and testing

Dynamometers

Responsive to force

73DIG2, G01L 112

Patent

active

045613141

ABSTRACT:
A force/flash pressure sensor utilizes a stack of annular rings of a magnetoelastic material. One major stack surface is supported at a plurality of points having substantially equal angular displacement therebetween. A member, moving along the axis of the ring stack responsive to an axial force, or pressure, to be measured, presses a different set of points against the opposite stack surface, to distort the ring stack and alter the magnetic flux density saturation magnitude thereof. The plurality of points in abutment with each of the opposite major stack surfaces is advantageously equal; a number of different configurations for applying force (pressure) along the axis of the ring stack are described.

REFERENCES:
patent: 3258962 (1966-07-01), Dahle
patent: 3299382 (1967-01-01), Tanaka et al.
patent: 4434671 (1984-03-01), Yamashita et al.
"New Force Transducers Using Amorphous Ribbon Cores", Mohri et al., IEEE Transactions on Magnetics, vol. MAG-14, No. 5, Sep. 1978, pp. 1071-1075.
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"New Extensometers Using Amorphous Magnetostrictive Ribbon Wound Cores", Mohri et al., IEEE Transactions on Magnetics, vol. 9-17, No. 3, May 1981, pp. 1317-1319.
"Sensitive Magnetic Sensors Using Amorphous Weigand-Type Ribbons", Mohri et al., IEEE Transactions on Magnetics, vol. MAG-17, No. 6, Nov. 1981, pp. 3370-3372.
"Stress-Magnetic Effects In Iron-Rich Amorphous Alloys And Shock-Stress Sensors With No Power", Mohri et al., IEEE Transactions on Magnetics, vol. MAG-17, No. 6, Nov. 1981, pp. 3379-3381.
"Metallic Glasses In Sensors And Transducers", Lewis Holmes, Electronics & Power, Feb. 1982, pp. 180-182.
"Amorphous Bistable Magnetic Sensors Due To Matteucci Effect", Mohri et al., Proceedings of the 2nd Sensor Symposium, 1982, pp. 219-222.
"Sensitive Bistable Magnetic Sensors Using Twisted Amorphous Magnetostrictive Ribbons Due To Matteucci Effect", Mohri et al., Journal of Applied Physics, vol. 53, No. 11, Nov. 1982, pp. 8386-8388.

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