Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1990-09-05
1992-09-29
Wieder, Kenneth A.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324663, 324664, 324686, 361285, G01R 2726
Patent
active
051516608
ABSTRACT:
A ceramic bodied sensor having helical metallized electrodes for measuring the capacitance of an oil-water-gas or oil-water mixture flowing through a central bore of the sensor is disclosed. The sensor generally is a hollow cylinder with an inner ceramic layer which is very thin, a thicker outer ceramic layer which forms a strong structural unit, and a pair of isolated metallized electrodes which are generally approximately located between the inner and outer ceramic layers. The inner ceramic layer, outer ceramic layer and metallized electrodes form a dense monolithic ceramic tube. The electrode plates are preferably identical in size and shape and are isolated from one another electrically so that a condenser is formed by the separated plates. The inner ceramic layer is preferably very thin to minimize its capacitance value in comparison to the capacitance value of the water-oil-gas or oil-water mixture flowing through the central bore of the sensor. the sensor measures changes in the capacitance with changes in composition of the oil-water or oil-water-gas concentrations. Because the dielectric properties of oil and/or water and/or gas are considerably different, the relative composition of each fluid component can be mathematically modeled and thus measured.
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Curtis Tony G.
Limaye Santosh Y.
Powers Kelly R.
Roy Robert D.
Brown Glenn W.
Wieder Kenneth A.
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