Electricity: measuring and testing – Electrostatic field – Using modulation-type electrometer
Patent
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.
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Basch Duane C.
Harvey Jack B.
Xerox Corporation
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