Magnetic field intensity measuring device with frequency change

Details Magnetic field intensity measuring device with frequency change Magnetic field intensity measuring device with frequency change

1979-04-09

1981-12-08

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetometers

324258, 331 65, G01R 3302

Patent

active

043050344

ABSTRACT:
A device powered by a DC source produces an output signal the frequency of which changes as a function of changes in external magnetic fields sensed by such device. A pair of non-linear amplifiers are interconnected so that the output of one amplifier is the input of the other amplifier. An inductive sensor is connected between the outputs of the amplifiers. The inductive sensor has an elongated magnetic core and a coil is wound on the core. The voltages at the outputs of the amplifiers, across the inductive sensor, switch between zero and the full voltage of the DC source.

REFERENCES:
patent: 2991414 (1961-07-01), Tillman
patent: 3040247 (1962-06-01), Van Allen
patent: 3210689 (1965-10-01), Burwen
patent: 3356963 (1967-12-01), Buck
patent: 3416072 (1968-12-01), Fussell et al.
patent: 3768011 (1973-10-01), Swain
patent: 3890580 (1975-06-01), Kuhn et al.
patent: 4053849 (1977-10-01), Bower et al.

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