Double-ring coaxial optical fiber turbine flow meter and test method

A technology of turbine flowmeter and coaxial optical fiber, which is applied to the volume/mass flow generated by mechanical effects, the use of optical devices to transmit sensing components, and the detection of dynamic effects of fluid flow, etc., can solve the problem of low accuracy and range of turbine flowmeters Small ratio and other issues, to achieve the effect of light weight, improved measurement accuracy, and strong anti-interference ability

Inactive Publication Date: 2014-12-10
NORTHWESTERN POLYTECHNICAL UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] In order to avoid the shortcomings of the existing technology and overcome the problems of low precision and small range rati

Method used

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  • Double-ring coaxial optical fiber turbine flow meter and test method
  • Double-ring coaxial optical fiber turbine flow meter and test method
  • Double-ring coaxial optical fiber turbine flow meter and test method

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Embodiment Construction

[0032] This embodiment is a double-circle coaxial fiber optic turbine flowmeter and a testing method.

[0033] refer to Figure 1 to Figure 6 , the turbine flowmeter of double-coaxial coaxial optical fiber in this example includes a pipe housing 1, a turbine 2, a flow guide frame 3, a probe sheath 4, a double-coaxial optical fiber probe 5, a transmitting optical fiber 6, and an inner ring receiving optical fiber 7. The outer ring receives the optical fiber 8, the turbine 2 is fixedly connected with the guide frame 3, and installed in the pipe shell 1; there are screw holes on the wall of the pipe shell 1, and the double-circle coaxial optical fiber probe 5 is perpendicular to the axis of the pipe shell 1 The direction is fixedly matched with the screw hole on the wall of the pipeline shell 1, and is fixed at the middle part of the turbine 2 axial direction; the distance between the double-circle coaxial fiber optic probe 5 and the turbine blade end is 0.075mm-1.075mm; the doub...

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Abstract

The invention discloses a double-ring coaxial optical fiber turbine flow meter and a test method. The double-ring coaxial optical fiber turbine flow meter comprises a pipe casing, a turbine, a diversion frame and a double-ring coaxial optical fiber probe. The turbine is fixedly connected with the diversion frame and arranged in the pipe casing, the wall of the pipe casing is provided with a screw hole, the double-ring coaxial optical fiber probe is perpendicular to the axial direction of the pipe casing, matched with the screw hole in the wall of the pipe casing and arranged in the middle portion of the turbine in the axial direction. The double-ring coaxial optical fiber probe is used for picking up a light pulse signal of blades of the turbine, light intensity optical fibers perpendicularly irradiate to the surface of the turbine, two groups of receiving optical fibers receive the reflected light, and the perpendicular distance from the optical fiber probe to the turbine is calculated through the light intensity ratio of the two groups of receiving optical fibers. The rotational frequency of the turbine can be obtained according to the relationship between the reflective distance and the light intensity ratio and then a flow rate value can be calculated. The optical fiber turbine flow meter uses the reflective double-ring coaxial optical fiber probe to avoid errors caused by magneto-resistance, so that the measuring range of the flow measurement is expanded, the high anti-electromagnetic interference capability is achieved, and the accuracy of the measurement is improved.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensors for fluid measurement, and in particular relates to a double-circle coaxial optical fiber turbine flowmeter and a testing method. Background technique [0002] In many areas of industrial production and daily life, it is necessary to monitor the flow of fluid. Currently, commonly used flowmeters include target flowmeters, turbine flowmeters, and vortex flowmeters. The turbine flowmeter measures the flow rate based on the principle that the impeller speed is proportional to the fluid flow rate; due to its small pressure loss and high precision, it has been widely used in petroleum, chemical, aviation and metering fields. However, the traditional electromagnetic turbine flow sensor is easily affected by electromagnetic interference, while the optical fiber sensor uses optical fiber for sensing and transmission, which does not have the above problems, so it has been more and more used ...

Claims

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Application Information

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IPC IPC(8): G01D5/353G01F1/28
Inventor 郭迎清杜玉环薛海东贺琛张小栋
Owner NORTHWESTERN POLYTECHNICAL UNIV
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