Preparation and pasting method of optical fiber sensor for measuring outer curvature of columnar material

A technology of optical fiber sensor and external curvature, which is applied in the direction of cladding optical fiber, measuring devices, instruments, etc., can solve the problems of insufficient reliability and stability, and achieve the effect of improving transmission rate, stable wavelength, and small restoring force

Active Publication Date: 2021-09-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of insufficient reliability and stability in the above-mentioned prior art, to provide a preparation and application method of an optical fiber sensor for measuring the outer curvature of columnar materials, and to meet the engineering requirements for monitoring the outer curvature of columnar materials

Method used

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  • Preparation and pasting method of optical fiber sensor for measuring outer curvature of columnar material
  • Preparation and pasting method of optical fiber sensor for measuring outer curvature of columnar material
  • Preparation and pasting method of optical fiber sensor for measuring outer curvature of columnar material

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preparation example Construction

[0036] Among production method of the present invention, the fiber Bragg grating should be integrated coating material, the grating gauge (sensing gauge) two key factors for production and selection. Further, the fiber coating should be high temperature, such as a polyimide coating layer (300 ℃ resistant to high temperature), so as to ensure the production of the sensor, during use, the coating layer of the optical fiber from damage; the gauge FBG sensor should be as small (10mm inside), smaller gauge sensor embedded in the substrate, can ensure maximum recovery force sensing small region of the grating, to ensure maximum sensing area with a grating film base changes together. Integrated base material should: hardness, resilience, shrinkage, color, cost, and obtained a manner, manufacturing conditions these factors into selected.

[0037] Substrate material should have suitable hardness (about 50HA), the tensile distortion is not deformed repeatedly, tearing, able to bend along wi...

Embodiment

[0043] See figure 1 Preparation method of the present invention an optical fiber sensor, the optical fiber and the first choice of the substrate material; fiber Bragg grating of the present embodiment selects a company making, sensing gauge of 10mm, a polyimide coating material, the working temperature range of -30 ℃ -300 ℃, a core diameter of 0.1mm. Select a type of commercial silicone rubber, and the performance parameters are in line with commercial silicon rubber figure 1 Among flowchart of color, shrinkage, hardness, way to obtain and cost, production conditions, required recovery force. The liquid silicone rubber into A, B two components. In use, the A, B two proportions to classification.

[0044] use figure 2 Aluminum mold shown, the mold is divided into two parts, up and down without the cover, only four sides, parallel to the fiber delamination stopper 201 holes, the total diameter of the optical fiber parallel limiting hole 1mm, 202 at the four corners of a bolt connect...

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Abstract

A preparation and pasting method of an optical fiber sensor for measuring the outer curvature of a columnar material comprises the following steps: selection of an optical fiber grating and a substrate material: selecting the optical fiber grating by integrating a coating layer material and a sensing scale distance; selecting a substrate material according to the hardness, the restoring force, the shrinkage rate, the color, the obtaining mode and cost and the manufacturing conditions; manufacturing a mold, wherein a mold material is required to ensure that the cured substrate is completely demolded; enabling the size of the mold to meet the size condition of a pure bending model in engineering; process manufacturing: cleaning the mold, fixing the fiber bragg grating, and spraying a release agent; filling a substrate material, and defoaming; and drying, curing and demolding to obtain the optical fiber sensor. The application method comprises the following steps of: placing the sensor below the crossed winding part of the self-adhesive tape by adopting a self-adhesive tape crossed winding fixing mode, and applying the substrate to the outer layer of a detected columnar object to resist four angular forces of the optical fiber sensor. According to the invention, the reliability and stability of curvature monitoring can be improved.

Description

Technical field [0001] The present invention pertains to optical fiber sensing measurement field, and particularly relates to a preparation method of sticking an optical fiber sensor for measuring the curvature of the outer cylindrical material. Background technique [0002] Since the curvature sensing technology was born, at home and abroad has been subjected to a great deal of research, including in the field of civil engineering, aerospace, biomedicine, robotics, it has been widely used. The response to higher precision, smaller size, lighter weight curvature, higher safety measurement needs flexible structure, has been proposed based on a series of optical fiber sensing technology of curvature of the flexible substrate is detected, it can be used to measure a variety of curvature of complex structure. Electrical compared to conventional sensing technology to bring electromagnetic interference, insecurity and other factors, the optical fiber sensing with an optical fiber as a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02G01B11/24
CPCG02B6/02123G01B11/24
Inventor 王霞樊卓杨吴超姜泉旭
Owner XI AN JIAOTONG UNIV
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