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A fiber optic sensor packaged based on a single capillary glass tube and its testing method

A technology of optical fiber sensor and capillary glass tube, which is applied in the direction of instruments, measuring heat, measuring devices, etc., can solve the problems that the temperature and strain cannot be distinguished and measured, and achieve the effect of low cost and simple production

Active Publication Date: 2020-12-08
NORTHWEST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the RFBG sensor in the prior art still cannot realize the differential measurement of temperature and strain

Method used

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  • A fiber optic sensor packaged based on a single capillary glass tube and its testing method
  • A fiber optic sensor packaged based on a single capillary glass tube and its testing method
  • A fiber optic sensor packaged based on a single capillary glass tube and its testing method

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] The purpose of the present invention is to provide a fiber sensor based on a single capillary glass tube packaging, which can distinguish between temperature and strain.

[0038] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] figure 1 A schematic struc...

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Abstract

The invention discloses an optical fiber sensor based on a single capillary glass tube package and a testing method. The optical fiber sensor includes: a single-mode fiber, a first thermally regenerated fiber grating, a second thermally regenerated fiber grating and a capillary glass tube; both the first thermally regenerated fiber grating and the second thermally regenerated fiber grating are written on On the core of the single-mode optical fiber, there is a preset distance between the first thermally regenerated fiber grating and the second thermally regenerated fiber Bragg grating; the capillary glass tube is sleeved on the outside of the second thermally regenerated fiber grating One end of the capillary glass tube is fixed on the single-mode optical fiber between the first thermally regenerated fiber grating and the second thermally regenerated fiber Bragg grating by high temperature glue. The invention can realize the differential measurement of temperature and strain.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to an optical fiber sensor packaged based on a single capillary glass tube and a testing method. Background technique [0002] High-temperature strain measurement is an important means to monitor the skin health of a hypersonic vehicle during flight. However, in high-temperature strain measurement, due to the influence of high-temperature environment, the material properties of the test piece and the strain gauge will change, which will lead to changes in the sensitivity coefficient, thermal output and thermal hysteresis of the strain gauge, thereby affecting the strain measurement accuracy. Therefore, high temperature has many influences on sensors and test data, and the measurement of high temperature strain has become a difficult point in testing. [0003] With the increasing development of modern optical fiber communication technology, optical fiber sensing techno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/32G01B11/16
CPCG01K11/3206G01B11/16
Inventor 杨杭洲田琴何宇栋刘继韩钊
Owner NORTHWEST UNIV
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