Fluid mixture ratio monitoring method and apparatus

Details Fluid mixture ratio monitoring method and apparatus Fluid mixture ratio monitoring method and apparatus

1991-02-20

1992-01-21

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

324634, 324636, 324642, 324643, G01R 2704

Patent

active

050830899

ABSTRACT:
Method and apparatus for monitoring the volumetric ratio of two constituents of a fluid mixture, e.g. crude oil and water, flowing through a conduit are described. A non-contacting, bidirectional, microwave transmitting/receiving antenna, coupled with a cavity having a conduit through which the fluid mixture passes, generates a signal indicative of the changing dielectric constant of the fluid mixture. By locating the conduit proximate the aperture of the antenna, and by dimensioning the conduit's depth approximately one-fourth the shorter of the two predetermined wavelengths of microwave energy in the two fluid constituents, a substantially linear response of the fluid mixture to the microwave energy incident thereon is produced. The linear response is indicative of the percentage of oil in the fluid mixture flowing through the conduit.

REFERENCES:
patent: 4234844 (1980-11-01), Yukl
patent: 4266188 (1981-05-01), Thompson
patent: 4318108 (1982-03-01), Yukl
patent: 4651085 (1987-03-01), Sakurai
patent: 4912982 (1990-04-01), Yukl
patent: 4947848 (1990-08-01), Yukl
"Complex Dielectric Properties of Macroemulsions in the Microwave Region", Journal of Colloid and Interface Science, Thomas, et al., Oct. 1, 1990.

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