AC Generator system having stabilized sensitivity for sensing th

Details AC Generator system having stabilized sensitivity for sensing th AC Generator system having stabilized sensitivity for sensing th

1978-11-15

1981-09-22

Grimm, Siegfried H.

Oscillators

With device responsive to external physical condition

324222, 324327, 361180, G01R 3300, G01V 311

Patent

active

042912806

ABSTRACT:
A conductive object detector having an eddy current killed oscillator, wherein the oscillator output is stabilized by means of a proportional plus integral controller. The controller proportional gain is set low and the integral time long, hence a conductive object near the oscillator will "kill" it, whereas the controller will minimize the effect of temperature or aging on the oscillator output.

REFERENCES:
patent: 2919413 (1959-12-01), Charles
patent: 3005110 (1961-10-01), Elam
patent: 3127105 (1964-03-01), Nichols
patent: 3129415 (1964-04-01), McKnight
patent: 3331016 (1967-07-01), Eksten
patent: 3453532 (1969-07-01), Gardiner
Behar, "The Handbook of Measurement and Control", The Instruments Publishing Company, Inc., Pittsburgh, Pa., 1951, p. 125.
"The Instrument Manual", United Trade Press, Ltd., London, 1953, p.410.
"400 Ideas for Design, " Hayden Book Company, Inc., NY, 1971, pp. 119, 120, 254, 255.
Science and Electronics, Oct.-Nov., 1969, pp. 79-82.

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