G - Physics – 01 – N
Patent
G - Physics
01
N
324/43
G01N 23/02 (2006.01) G01N 9/24 (2006.01) G01N 22/00 (2006.01) G01N 27/02 (2006.01) G01R 27/22 (2006.01) G01R 27/26 (2006.01) G01N 22/04 (2006.01)
Patent
CA 2000223
Radio frequency bridge techniques are used to parameterize the complex dielectric properties of solids, liquids, gases and mixtures thereof. This parameterization is performed in an electrically isolated, physically open structure which allows continuous or batch monitoring of the materials and their mixtures. A method and apparatus are provided for measuring the composition of multicomponent process streams flowing in pipes or ducts. The method uses the pipe in which the mixture flows as a waveguide in which propagating radio frequency electromagnetic energy is induced through dielectric loaded apertures. The dielectric measurement is performed in an electrically isolated, flow through test section which induces constructive or destructive interference patterns at characteristic frequencies. The characteristic frequency determines the dielectric constant of the mixture. The dielectric properties are used in turn to determine mixture composition. A density measurement is also provided for three component streams such as oil, water, and gas. Temperature and pressure measurements are made to correct for temperature and pressure induced variations in calibrated component impedance and density values.
Bjornsen Bjorn G.
Gaisford Scott G.
Watjen John P.
Den Norske Stats Oljeselskap A.s.
Macrae & Co.
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