Capacitive transducer for providing precise angular positional i

Details Capacitive transducer for providing precise angular positional i Capacitive transducer for providing precise angular positional i

1981-05-07

1983-09-13

Swann, III, Glen R.

Communications: electrical

Continuously variable indicating

With particular transmitter

324 60C, 340686, 340688, G08C 1916

Patent

active

044045603

ABSTRACT:
A transducer is described which has a rotor with at least one track of spaced conductive segments and a stator having at least one track of spaced conductive segments respectively facing and spaced from the track on the stator. Apparatus for rotating the rotor with respect to the stator is included whereby the track on the rotor rotates with respect to the track on the stator. An electrical signal source provides an alternate electrical signal to the track of conductive segments on either the rotor or the stator, and means are connected to the other track of conductive segments for sensing the capacitive effect in said other track by said electrical signal. At least one of the tracks has a plurality of non-rectangular segments, e.g., triangular segments of shapes selected to produce transducer output waveforms of varied shapes.

REFERENCES:
patent: 3068457 (1962-12-01), Nevills
patent: 3348133 (1967-10-01), Wolfendale
patent: 3702467 (1972-11-01), Melnyk
patent: 3938113 (1976-02-01), Dobson et al.
patent: 4040041 (1977-08-01), Fletcher et al.
"Dual Plane Capacitive Coupling Encoder" authored by R. J Flaherty, M. L. Sendelweck, and J. W. Woods, IBM Technical Disclosure Bulletin, vol. 15, No. 4, Sep. 1972.
"Electrodynamic Velocity and Position Sensor and Emitter Wheel", authored by H. E. Naylor, III and R. A. Williams, IBM Technical Disclosure Bulletin, vol. 16, No. 10, Mar. 1974.
"Trapped Charge Transducer for Low-Cost Angular Position Sensing", authored by J. M. Rakes, and E. R. Williams, IBM Technical Disclosure Bulletin, vol. 23, No. 11, Apr. 1981.

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