Flow measurements
AssigneeRoxar Flow Measurements AS
InventorEbbe Gustaf Nyfors
Life of this patent
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Abstract
This invention relates to a measuring instrument for measurement of a flow (1) comprising—a dielectric resonator sensor (3) arranged in a pipeline (2), said resonator (3) having a surface (4) facing a flow volume, —a sensor drive unit (12) being coupled to said sensor (3) and which is adapted to provide a driving or excitation signal to said sensor (3) resulting in the excitation of an electromagnetic resonance in said sensor causing a fringing electromagnetic field (5) adjacent to said surface (4) facing said wet gas flow (1), —a recording unit (10) coupled to said sensor (3) and which is adapted to measure a resonance property of said sensor (3) while said wet gas flow (1) moves past said sensor surface (4), and—a processing unit (11) which is adapted to estimate a property of at least a part of said wet gas flow (1).
Claims19
A measuring instrument for measuring water content in a fluid flow in a pipeline for transporting fluid hydrocarbon, the measuring instrument comprising:
- at least one dielectric resonator sensor configured to form a time varying electric field extending from said resonator sensor, the time varying electric field extending into an inner volume section adjacent an inside wall of said pipeline, wherein the resonator sensor is seated in or against the inside wall and the resonator sensor faces a region of the inside wall devoid of the resonator sensor, and
- a measuring unit configured to measure a resonance frequency of said resonator sensor and estimate a water content of a fluid flow in said inner volume section adjacent an inside wall of said pipeline based on said measurement of a resonance frequency.
A measurement instrument for measuring water content in a fluid flow in a pipeline for transporting fluid hydrocarbon, the measuring instrument comprising:
- at least one dielectric resonator sensor configured to project a time varying electric field extending from said resonator sensor into an inner volume of the pipeline, wherein said resonator sensor is tilted with respect to a direction parallel with said pipeline, and the resonator sensor includes a plane surface facing the fluid flow, and
- a measuring unit configured to measure a resonance frequency of said resonator sensor and estimate a water content of a fluid flow through said inner volume of said pipeline based on said measurement of a resonance frequency.
A measuring instrument to determine a liquid content in a fluid flowing through a pipe, the measuring instrument comprising:
- a dielectric resonator having a resonating surface adjacent an interior wall of the pipe, wherein a cross-section of the interior wall at the resonator resonating surface includes portions of the wall devoid of the resonating surface and wherein the resonator is configured to project a time varying electric fringing field extending into a flow of the fluid through the pipe and the resonator is configured to generate a signal indicative of a resonance of the resonating surface in response to the fringing field, and
- a measuring unit configured to measure a resonance frequency of resonating surface based on the signal generated by the resonator and calculate a content of a liquid in the fluid flowing through the pipe based on the resonance frequency.
Dependencies are inferred from the claim text.