Single balanced beam electrostatic voltmeter modulator

Details Single balanced beam electrostatic voltmeter modulator Single balanced beam electrostatic voltmeter modulator

1992-03-09

1993-05-18

Harvey, Jack B.

Electricity: measuring and testing

Electrostatic field

Using modulation-type electrometer

324 725, G01R 2912

Patent

active

052124517

ABSTRACT:
An electrostatic measurement apparatus having a single balanced beam vibratory element supported and balanced at its center, so that it may be driven in a manner to cause a regular vibration of the beam. The apparatus also has an electrode suitable for sensing a capacitive coupling relationship with an electrostatic field to produce a signal indicative of the magnitude of the electrostatic field. The coupling of the electrode with the electrostatic field is modulated (coupled/decoupled) either by attaching the electrode to the end of the beam and vibrating the electrode past an aperture, or by affixing a vane to the end of the beam, whereupon the vibration of the beam causes the vane to occlude the electrode from capacitively coupling with the electrostatic field.

REFERENCES:
patent: 3852667 (1974-12-01), Williams et al.
patent: 3921087 (1975-11-01), Vasteen
patent: 4149119 (1979-04-01), Buchheit
patent: 4318042 (1982-03-01), Eda et al.
patent: 4614908 (1986-09-01), Daniele et al.
patent: 4625176 (1986-11-01), Champion et al.
patent: 4649336 (1987-03-01), Binder et al.
patent: 4720682 (1988-01-01), Ikushima et al.
patent: 4763078 (1988-08-01), Williams

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