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Spring-type high-precision optical fiber sensor with cushioning structure

An optical fiber sensor and buffer structure technology, which is applied in the direction of using optical devices to transmit sensing components, cladding fibers, optical waveguide light guides, etc., can solve the problems of limiting the service life of optical fiber sensors, affecting the service life of optical fibers, etc. Simple structure and the effect of reducing tensile stress

Inactive Publication Date: 2010-11-10
XIAN JINHE OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] When the bend occurs in the fiber optic microbend sensor, the length of the fiber will either be elongated, or the part that has never been bent will move. The elongation of the fiber will increase the stress on the fiber and affect the service life of the fiber. With the increase of the bending arc length S, the phenomenon of forced elongation of the optical fiber will appear obviously, which limits the service life of this type of optical fiber sensor

Method used

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  • Spring-type high-precision optical fiber sensor with cushioning structure
  • Spring-type high-precision optical fiber sensor with cushioning structure
  • Spring-type high-precision optical fiber sensor with cushioning structure

Examples

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Embodiment 1

[0031] Such as figure 1 , figure 2 As shown, the present invention includes a multi-coil spring-shaped member 4 made of spring wire, on the upper surface and the lower surface of the spring wire, a plurality of deformation teeth are continuously arranged longitudinally along the spring wire, and the teeth in the adjacent two coils of spring wire The deformed teeth 4-1 on the lower surface of the upper spring wire are alternately corresponding to the deformed teeth 4-2 on the upper surface of the lower spring wire, and the deformed teeth 4-1 on the lower surface of the upper spring wire are connected with the upper surface of the lower spring wire. The signal optical fiber 6 is sandwiched between the deformed teeth 4-2, but at least one section of the signal optical fiber 6 is not clamped between the deformed teeth as a buffer signal optical fiber 10. When the two ends of the spring-shaped member 4 are stressed, the spring-shaped member 4 The positions of the two ends change,...

Embodiment 2

[0035] Such as image 3 As shown, in this embodiment, the difference from Embodiment 1 is that the buffered signal optical fiber 10 is located on the tray 11 , and the tray is fixed on the spring member 4 . In this embodiment, the structures, connections and working principles of other parts are the same as those in Embodiment 1.

Embodiment 3

[0037] Such as Figure 4 As shown, in this embodiment, the difference from Embodiment 1 is that the signal optical fiber 6 and the buffer signal optical fiber 10 are surrounded by a water-blocking material 20 to prevent water molecules from corroding the signal optical fiber 6 or the buffer signal optical fiber 10. , prolong the service life of the signal optical fiber 6 or the buffer signal optical fiber 10 . In this embodiment, the structures, connections and working principles of other parts are the same as those in Embodiment 1.

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Abstract

The invention discloses a spring-type high-precision optical fiber sensor with a cushioning structure. By adopting a multi-turn structure, the optical fiber sensor greatly prolongs the length of an effective signal optical fiber, improves the dynamic range of the optical fiber sensor while dramatically reducing the bending curvature of the signal optical fiber, and takes at least one signal optical fiber section as a buffer signal optical fiber; and when the signal optical fiber tends to elongate or contract caused by change of the bending curvature of the signal optical fiber, movement of the buffer signal optical fiber can make up or absorb elongation or contraction of the length of the signal optical fiber owing to change of the bending curvature so that the axial stress of the signal optical fiber is reduced when in use and the service life of the signal optical fiber is prolonged. The spring-type high-precision optical fiber sensor has the advantages of simple structure, rational design, convenient processing and manufacturing, flexible usage mode, high sensitivity, long service life and good use effect, thus providing a wide application prospect for application of the optical fiber sensor.

Description

technical field [0001] The invention relates to an optical fiber sensor in the field of sensing technology, in particular to a spring type multi-layer optical fiber sensor with a buffer structure for high-precision stress parameter testing. Background technique [0002] There are many types of existing optical fiber sensors, mainly including light intensity adjustable optical fiber sensors, fiber grating sensors, and optical fiber interference sensors. The latter two are characterized by high sensing sensitivity, but in the actual application process, there are complex equipment , High operating costs and other defects and deficiencies, which greatly restrict the application and promotion of optical fiber sensors. Especially for high-sensitivity optical fiber sensors, which will respond to changes in various environmental conditions during use, such as optical fiber interference sensors, due to their high sensitivity, but when they are applied to actual conditions, it is fou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/26G01D3/028G02B6/02
Inventor 杜兵杜蔚杜迎涛
Owner XIAN JINHE OPTICAL TECH