Capacitively coupled rotational speed detector

Details Capacitively coupled rotational speed detector Capacitively coupled rotational speed detector

1981-08-18

1984-03-06

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

324163, G01P 354

Patent

active

044357028

ABSTRACT:
A rotating member having a plurality of electrodes at a predetermined pitch is secured to a rotating body of a rotary machine, opposite to the rotating member a stationary member having a plurality of electrodes at the same pitch as that of the rotating member is arranged, and a variation in electrostatic capacity between the electrodes of the rotating member and the electrodes of the stationary member is detected so as to produce an output corresponding to a rotational speed of the rotating body of the rotary machine in accordance with the variation in electrostatic capacity.

REFERENCES:
patent: 2805677 (1957-09-01), Baird
patent: 3408556 (1968-10-01), Gabor
patent: 3702467 (1972-11-01), Melnyk
patent: 4199800 (1980-04-01), Weit

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