Capacitive type measurement transducer with improved electrode a

Details Capacitive type measurement transducer with improved electrode a Capacitive type measurement transducer with improved electrode a

1988-05-31

1989-10-31

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 61P, 34087037, G01R 2726, G08C 1916

Patent

active

048780138

ABSTRACT:
A capacitive type measuring apparatus comprises first and second electrode arrays mounted on first and second support members which are relatively displaceable with respect to each other. The first electrode array comprises a series of discrete first electrodes uniformly spaced with a pitch P.sub.r defining a scale wavelength and the second electrode array comprises a series of discrete second electrodes arranged so as to define a plurality of electrode groups each having N electrodes, where N is an integer greater than 2. The second electrodes forming each of the electrode groups are positioned within the respective groups so as to respectively occupy predetermined group positions which are distributed over a distance spanning more than one scale wavelength such that each of the group positions corresponds to the relation position of a different one of a set of relative scale wavelength segment positions obtained by dividing the group into intervals corresponding to the scale wavelength, and dividing each interval into N equal segments.

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patent: 4586260 (1980-05-01), Baxter et al.
patent: 4654524 (1987-03-01), Kita
patent: 4654581 (1987-03-01), Neukermans et al.

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