Electrometer

Details Electrometer Electrometer

1974-11-25

1976-12-14

Rolinec, R. V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Electrostatic attraction or piezoelectric

324 32, 324 725, G01R 528, G01R 2912

Patent

active

039978397

ABSTRACT:
The device measures electrical charges, an electrical voltage or an electrical current, present between two electrodes of which one is fixed and of which the other is mounted so as to be able to vibrate mechanically. One of the two electrodes is connected to ground. Energizing means apply an AC voltage V.sub.o of frequency f.sub.o between the two electrodes. Means are provided for detecting the amplitude of the mechanical vibrations of frequency f.sub.o of the vibrating electrode and means for measuring this amplitude, which is a function of the parameter to be measured. The means for detecting and measuring the amplitude of the mechanical vibrations is a piezo-electric element subject to these vibrations and an apparatus adapted to measure the AC voltage produced.

REFERENCES:
patent: 3195037 (1965-07-01), Van Nie
patent: 3256481 (1966-06-01), Pulvari
patent: 3504281 (1970-03-01), Cromer et al.

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