Optical fiber flow meter with fluorescent material and control method

Abstract

The invention provides an optical fiber flow meter with a fluorescent material, which is used for determining a mass flow rate of a fluid in a fluid pipe. The optical fiber flow meter comprises two fluorescent materials (1) arranged at an interval, two optical fibers (3) arranged at intervals of the two fluorescent materials (1) and used for transmitting a light source, a photoelectric module (5)and an upper computer (7), wherein the photoelectric module (5) is connected with two optical fibers (3) and used for emitting high-energy light beams, receiving optical signals from the optical fibers (3) and converting the optical signals into electric signals; the upper computer (7) is connected with the photoelectric module (5) and used for determining and storing the mass flow of the fluid; and the two fluorescent materials (1) which are arranged at the interval are attached to an outer pipe wall of the fluid pipe (4). Geometric dimensions of an optical probe and the fluorescent materialsadopted by the invention can be very small, a corresponding heat capacity is also very small, measurement responsivity is high, and miniaturization and integration are facilitated. The flow meter issimple in structure, convenient to use and accurate in measurement, and has an extremely high commercial value.

Description

technical field [0001] The invention belongs to the technical field of flow detection and optical fiber sensing, and relates to a thermal mass flowmeter, in particular to an optical fiber flowmeter with fluorescent material and a control method. Background technique [0002] A thermal mass flowmeter is an instrument that uses the principle of heat conduction to measure mass flow, and usually consists of two reference thermal resistors placed on the pipe wall. The commonly used measurement method is to apply a specified voltage or flow a specified current to the two thermal resistors to make them generate heat and transfer the heat to the fluid in the tube. When the fluid is static, the temperature of the thermal resistances on the upstream and downstream is equal. When the fluid flows, the temperature on the downstream is higher than that on the upstream, and increases approximately linearly with the increase of the mass flow rate of the fluid. Since the resistance value of...

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Problems solved by technology

It is not suitable for harsh narrow spaces (such as toxic, flammable, explosive, high temperature and high pressure, strong electromagnetic interference, etc.)

[0004] How to overcome the above-mentioned technical defects so as to be able to accurately calculate the mass flow rate of the fluid has become a technical problem to be solved urgently. However, in the current prior art, there is no technical solution that can effectively solve the above-mentioned technical problems, that is, there is no one Optical fiber flowmeter with fluorescent material and control method

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