Flow velocity detection device based on optical fiber deformation

A detection device and optical fiber deformation technology, which is applied in the field of flow velocity detection, can solve the problems of low detection accuracy and achieve the effect of high flow velocity detection accuracy

Inactive Publication Date: 2021-02-05
金华伏安光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The detection accuracy of the traditional flow rate detection device is low

Method used

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  • Flow velocity detection device based on optical fiber deformation
  • Flow velocity detection device based on optical fiber deformation
  • Flow velocity detection device based on optical fiber deformation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The invention provides a flow velocity detection device based on optical fiber deformation. Such as figure 1 As shown, the flow velocity detection device based on optical fiber deformation includes a cavity 1 and a micro-nano optical fiber 3 . The cavity 1 encloses a pipe 2 in which fluid flows. The cavity 1 is provided with a through hole through which the micro-nano optical fiber 3 passes, and the end of the micro-nano optical fiber 3 is placed in the pipe 2 . The micro-nano optical fiber 3 is not fixedly connected to the wall of the through hole.

[0022] In application, the light source emits laser light, and the laser light is coupled into the micro-nano fiber 3 ; the light detector detects the laser light reflected from the micro-nano fiber 3 . The laser can be a monochromatic laser or a continuous spectrum laser. When the laser is a monochromatic laser, the photodetector detects the reflection coefficient of the monochromatic laser; when the laser is a contin...

Embodiment 2

[0026] On the basis of Example 1, such as figure 2 As shown, it also includes a strengthening part 4, the strengthening part 4 is fixed on the end face of the micro-nano fiber 3 in the pipeline, and the strengthening part 4 strengthens the effect of the fluid and the micro-nano fiber 3, so that the micro-nano fiber 3 produces a greater degree The bending of the micro-nano optical fiber 3 can change the reflection characteristics of the micro-nano fiber 3 more, so as to realize the measurement of flow velocity with higher precision. The width of the strengthening part 4 is larger than the diameter of the micro-nano fiber 3 to further enhance the interaction between the fluid and the micro-nano fiber 3 , so that the micro-nano fiber 3 can be bent more significantly. The material of the reinforcing action part 4 is a noble metal, and the noble metal is gold or silver, so as to enhance the reflection effect of the micro-nano fiber 3 end to the incident light, thereby changing the...

Embodiment 3

[0028] On the basis of Example 2, such as image 3 As shown, in the duct, the end of the micro-nano fiber 3 only includes the core. On the one hand, the bare core facilitates the coupling of light in the micro-nano fiber 3 with the outside world; on the other hand, the bare core reduces the size of the micro-nano fiber 3, thereby enabling greater bending. The noble metal part 5 is fixed on the fiber core, and the material of the noble metal part 5 is gold. The noble metal part 5 is strip-shaped, and the direction of the strip is along the axial direction of the fiber core. When the noble metal part 5 is arranged on the fiber core, the energy in the fiber core is mainly concentrated between the fiber core and the noble metal part 5 , forming surface plasmon polaritons. In this way, when the core is bent, the noble metal part 5 is bent accordingly. Since the propagation characteristics of the surface plasmon polaritons are very sensitive to the shape of the noble metal part 5,...

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Abstract

The invention provides a flow velocity detection device based on optical fiber deformation. The device comprises a cavity and a micro-nano optical fiber. A pipeline is defined by the cavity, a throughhole is formed in the cavity, the micro-nano optical fiber penetrates through the through hole, the end part of the micro-nano optical fiber is arranged in the pipeline, and the micro-nano optical fiber is not fixedly connected with the wall of the through hole. The device has the advantage of high flow velocity detection precision.

Description

technical field [0001] The invention relates to the field of flow velocity detection, in particular to a flow velocity detection device based on optical fiber deformation. Background technique [0002] Flow rate refers to the displacement of liquid per unit time. Existing flow velocity detection devices include pitot tubes, propeller flow meters, and the like. The detection accuracy of the traditional flow velocity detection device is low. Contents of the invention [0003] In order to solve the above problems, the present invention provides a flow rate detection device based on optical fiber deformation, which includes a cavity and micro-nano optical fibers. The end of the optical fiber is placed in the pipe, and the micro-nano optical fiber is not fixedly connected with the wall of the through hole. [0004] Furthermore, it also includes a strengthening part, and the strengthening part is fixed on the end surface of the micro-nano optical fiber in the pipe. [0005] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/26
CPCG01P5/26
Inventor 不公告发明人
Owner 金华伏安光电科技有限公司
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