Roll independent variable inductance inclinometer

Details Roll independent variable inductance inclinometer Roll independent variable inductance inclinometer

1993-10-04

1997-12-30

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Displacement

324226, 33366, G01B 714, G01P 1500, G01C 906

Patent

active

057034842

ABSTRACT:
The pitch sensor of the invention includes a sealed container filled about half full with a magnetic liquid. A pair of coils are wound around the container and produce inductances corresponding to the amount of magnetic liquid disposed within the opening of the coils. As the angle of inclination of the pitch sensor changes, the volume of magnetic liquid becomes greater in one coil, as compared to the other coil, thereby providing a differential inductance. A pulsing circuit pulses the inductances and produces an analog voltage corresponding to the absolute angle of pitch, and a polarity voltage corresponding to the angle quadrant.

REFERENCES:
patent: 3184861 (1965-05-01), Conrad
patent: 3839904 (1974-10-01), Stripling et al.
patent: 3984918 (1976-10-01), Chaney
patent: 4531300 (1985-07-01), Hiedel et al.
patent: 4779353 (1988-10-01), Lopes et al.
patent: 4866378 (1989-09-01), Redlich
patent: 4967154 (1990-10-01), Marantette
patent: 5552703 (1996-09-01), Hore
German reference by Trankler (no translation) Messtechnik vol. 82 No. 1 Jan. 1974 pp. 13-18.

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