Process for the capacitive measurement of lengths and of angles

Details Process for the capacitive measurement of lengths and of angles Process for the capacitive measurement of lengths and of angles

1981-11-20

1984-03-13

Krawczewicz, Stanley T.

Electricity: measuring and testing

Conductor identification or location

Inaccessible

324 61P, 324 61QS, G01R 2726

Patent

active

044370555

ABSTRACT:
Several electrodes (20) are movable respective to several groups of electrodes (11 to 18). The latter receive, from modulating devices (28) modulation voltages which induce a voltage into the electrodes (20). The induced voltage is amplified in (21) and demodulated by a synchronous demodulating device (22) guided by an oscillator (23). The comparator (24) controls a binary counting device (25) the state of which constitutes a direct measurement of the relative position of the electrodes. The low-level outputs of counting device (25) govern a digital-analogical transformer (26) which delivers a modulation voltage to a function generator (27).

REFERENCES:
patent: 3297941 (1967-01-01), Wolfendale
patent: 3491292 (1970-01-01), Evans
patent: 3523246 (1970-08-01), Hall et al.
patent: 3857092 (1974-12-01), Meyer
patent: 3959723 (1976-05-01), Wagner
patent: 4296371 (1981-10-01), Keizer et al.

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