Operating circuit for magnetoelastic force/pressure sensors

Details Operating circuit for magnetoelastic force/pressure sensors Operating circuit for magnetoelastic force/pressure sensors

1983-10-27

1985-09-17

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

324209, G01L 112

Patent

active

045412880

ABSTRACT:
An operating circuit for use with a magnetoelastic force/pressure sensor provides for changing the current flow through at least one sensor coil at a frequency responsive to the magnitude of a force impingent upon the sensor. The sensor operating circuit operates in a manner to prevent the sensor magnetoelastic core from being driven deeply into saturation, thus providing an operating circuit with a reduced current drain. A number of embodiments, including clock-driven and self-clocking (toggling) circuit providing digital and/or analog outputs are described.

REFERENCES:
patent: 4039935 (1977-08-01), Wilson
patent: 4322973 (1982-04-01), Iwasaki
patent: 4414855 (1983-11-01), Iwasaki
"New Force Transducers Using Amorphous Ribbon Cores", Mohri et al., IEEE Transactions on Magnetics, vol. MAG-14, No. 5, Sep. 1978, pp. 1071-1075.
"Sensitive Force Transducers Using a Single Amorphous Core Multivibrator Bridge", Mohri et al., IEEE Transactions on Magnetics, vol. MAG-15, No. 6, Nov. 1979, pp. 1806-1808.
"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.
"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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