Capacitive sensor for measurement of a fuel wall film, particula

Details Capacitive sensor for measurement of a fuel wall film, particula Capacitive sensor for measurement of a fuel wall film, particula

1991-09-26

1992-12-29

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324678, 324687, 324688, 73304C, G01D 524, G01B 704, G02D 4100

Patent

active

051755050

ABSTRACT:
A capacitive sensor includes a plurality of individual condenser elements, each of which consist of a first, preferably circular, electrode and a second, preferably surrounding ring-shaped, electrode, which are mounted on one side of a nonconducting support. A common conductor is connected to each of the first electrodes of condenser elements. A signal can be detected separately from each of the condenser elements via conductors connected separately to the individual second electrodes. To increase the sensitivity and to avoid interference, the remote side of the support opposite to the one side is provided with a third additional electrode, which is at ground potential and also acts as a shield for interfering couplings. The sensor is used for measurement of the fuel film thickness in the intake of an internal combustion engine.

REFERENCES:
patent: 3739265 (1973-06-01), Skildum
patent: 3775277 (1973-11-01), Pompei
patent: 4423371 (1983-12-01), Senturia

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