Multi-phase flow multi-parameter optical fiber detection device based on optical carrier microwave interference

Abstract

The invention relates to a multi-phase flow multi-parameter optical fiber detection device based on optical carrier microwave interference. The device is characterized by comprising a broadband lightsource, a light polarizer, a light polarization controller, a frequency tunable microwave source, an electro-optical modulator, a light amplifier, an optical circulator, a transmission optical fiber,a double-cavity Fabry-Perot probe, a photoelectric detector, a phase locked amplifier, a vector microwave detector, a computer, a measuring pipeline and a multi-phase flow. The double-cavity Fabry-Perot probe comprises a sensing optical fiber, a capillary glass tube, a reflector and a silicon dioxide pressure sensitive diaphragm, a first Fabry-Perot cavity is formed by the reflector and the end face of the sensing optical fiber, and a second Fabry-Perot cavity is formed by the end face of the sensing optical fiber and the silicon dioxide pressure sensitive diaphragm. The silicon dioxide pressure sensitive diaphragm is in contact with the measured multi-phase flow, and the optical path differences corresponding to the two reflecting surfaces of the first Fabry-Perot cavity and the second Fabry-Perot cavity are both larger than the coherent length of the broadband light source and smaller than the coherent length of the microwave source.

Description

technical field [0001] The invention belongs to the field of multiphase flow testing, in particular to a multiphase flow multi-parameter optical fiber detection device based on light-borne microwave interference. Background technique [0002] Two-phase and multiphase flow are mixed fluids with two or more different phases or different components, which are common in important fields such as chemical industry, energy, water conservancy, metallurgy, meteorology, biology, food processing, aerospace, etc. Understanding and mastering the flow characteristics and parameters of multiphase flow is of great significance to national economic and social development. The flow form of multiphase flow is complex and changeable, and is easily affected by factors such as viscosity, surface tension, heat transfer coefficient, pressure, etc. In order to gain a deeper understanding of the flow mechanism and characteristics of multiphase flow, researchers at home and abroad have studied a varie...

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Problems solved by technology

[0005] Based on this, it is necessary to invent a new optical fiber interferometry system and method to solve the existing two-phase and multiphase flow non-invasive, high-precision flow field information detection, and multi-parameter feature fusion analysis problems

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