Capacitive measurement system

Details Capacitive measurement system Capacitive measurement system

1981-10-06

1984-01-17

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 60C, 324 62, G01R 2700

Patent

active

044266162

ABSTRACT:
A system for independently determining the capacitance and resistance of a capacitive sensor, in which the sensor and a reference capacitor are sequentially energized from two alternating voltage sources of different frequencies, and average sensor and reference capacitor current valves at the two frequencies are measured and supplied to a computer which periodically calculates the sensor capacitance and resistance.

REFERENCES:
patent: 2929020 (1960-03-01), Mayes
patent: 2973476 (1961-02-01), Graham
patent: 3255410 (1966-06-01), Norwich
patent: 3320946 (1967-05-01), Dethloff et al.

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