Electrostatic sensor

Details Electrostatic sensor Electrostatic sensor

1996-01-18

1999-09-07

Regan, Maura

Electricity: measuring and testing

A material property using electrostatic phenomenon

324662, 324690, G01R 2912

Patent

active

059492341

ABSTRACT:
An electrostatic sensor comprises a ground electrode defining an enclosure having a through-hole for permitting the passage of a body therethrough. A sensor electrode is disposed in the ground electrode. A detecting circuit is disposed in the ground electrode for detecting the passage of the body through the through-hole on the basis of a change in an electrostatic capacitance between the ground electrode and the sensor electrode.

REFERENCES:
patent: 1924687 (1933-08-01), Allen
patent: 2892152 (1959-06-01), Buisson
patent: 4290065 (1981-09-01), Gleason
patent: 4546645 (1985-10-01), Delmulle
patent: 4720682 (1988-01-01), Ikushima
patent: 4947131 (1990-08-01), Mayer
patent: 5134379 (1992-07-01), Maher
patent: 5266903 (1993-11-01), Foster
patent: 5291124 (1994-03-01), Hoffman

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