Abstract
The main requirements for flow meters are high accuracy, reliability, durability, resistance to aggressive media, cost-effectiveness, and the ability to output a signal in digital form. Most flowmeters that allow measuring mass flow are characterized by a very complex mechanical design and create a large hydrodynamic resistance to the flow. Fiber-optic flow meters undoubtedly have indisputable advantages and benefits: the absence of electric currents and voltages in the sensitive area of the device, immunity to external electromagnetic influences, absolute environmental and fire and explosion safety. At the same time, until recently, no successful circuitry solutions in the field of fiber-optic flowmeters for monitoring flammable liquids were known. Thus, the development and research of a new vortex fiber-optic flowmeter is an urgent scientific and technical problem. Analysis of the designs of known flow meters made it possible to specify the requirements for a new circuit design of the measuring device. The proposed design of the flow meter differs in that the main and control are essentially the same fiber made of sapphire glass, coaxially to which the sensitive fiber is located. And also a thermocompensating bimetallic plate is introduced into the meter circuit. The developed measuring device will provide: compensation of the influence of uncontrolled operational and climatological factors on the measuring and additional channel; lack of additional mechanical fiber tensioners; protection of sensitive elements of the device; constancy of the geometry of the optical channel under the influence of uncontrolled operational factors; identity of the location of the main and additional channels with respect to the flow of the controlled liquid; increased sensitivity and accuracy of the device.
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