Distance sensor utilizing a bridge circuit incorporating variabl

Details Distance sensor utilizing a bridge circuit incorporating variabl Distance sensor utilizing a bridge circuit incorporating variabl

1993-09-20

1995-05-02

Strecker, Gerard R.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324680, 324690, 324725, 361277, 361280, G01R 2726, H01G 700, G01B 714

Patent

active

054123275

ABSTRACT:
A capactive sensor contains a bridge circuit (1,2,3,4) which is comprised of an electrode surface (21) and a reference electrode surface (24) with the electrode surfaces located on the opposite sides of a plate. The bridge circuit is constructed as a multi-layered printed circuit board. The feed areas (23) which are opposite the electrode areas (21, 24) on one or two inner layers serve as feed capacitors (1, 2) in the bridge circuit (1, 2, 3, 4).

REFERENCES:
patent: 3678378 (1972-07-01), Trott et al.
patent: 4342143 (1982-08-01), Jennings
patent: 4466045 (1984-08-01), Coleman
patent: 4470096 (1984-09-01), Guertin

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