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Cascaded deformation sensor based on multi-core spiral fiber bragg grating

A technology of deformation sensor and optical fiber grating, which is applied in the direction of transmitting sensing components, cladding optical fibers, optical waveguides and light guides with optical devices, can solve problems such as insufficiency, and achieve the effect of wide application fields

Pending Publication Date: 2021-04-16
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is far from enough for the field that needs to monitor torsion and bending simultaneously and exclude temperature and strain cross-sensitivity

Method used

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  • Cascaded deformation sensor based on multi-core spiral fiber bragg grating
  • Cascaded deformation sensor based on multi-core spiral fiber bragg grating
  • Cascaded deformation sensor based on multi-core spiral fiber bragg grating

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Embodiment Construction

[0038] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the described embodiments, 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.

[0039] The invention discloses a cascaded shape sensor based on a multi-core spiral fiber grating, the structure of which is as follows figure 1As shown, a twisted region is prepared on the multi-core optical fiber 5 to form a multi-core spiral fiber, and then a fiber grating is prepared in the twisted region, and the spiral fiber gratings 6-1, 6-2, 6-3... are used as sensors A unit, cascading multiple spiral fiber...

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Abstract

The invention provides a cascaded deformation sensor based on a multi-core spiral fiber bragg grating, which is characterized in that a torsion area is prepared on a multi-core optical fiber to form the multi-core spiral optical fiber, then the fiber bragg grating is prepared in the torsion area, the spiral fiber bragg grating is used as a sensing unit, and a plurality of spiral fiber bragg gratings are cascaded to form a sensor array. The sensor is embedded into an object to be measured, curvature and flexibility conversion is carried out on each group of wavelength difference, and finally, the change of the shape of the object is obtained through inversion by utilizing the difference and fitting. The sensor can be used for online measurement of torsion, bending and other parameters, and has the functions of sensing and positioning a deformed object.

Description

[0001] (1) Technical field [0002] The invention relates to the technical field of optical fiber sensors, in particular to a cascaded deformation sensor based on a multi-core spiral fiber grating. [0003] (2) Background technology [0004] Optical fiber deformation sensing is a distributed sensing technology, which uses the backscattering signal generated by the local strain of the optical fiber to detect information such as bending and twisting of the optical fiber, and then processes the information to reconstruct the spatial deformation of the optical fiber. This technology has a wide range of applications in fields such as medical, energy, defense, aerospace and structural monitoring. Especially in the field of aerospace, fiber optic shape sensors have been applied to the research of adaptive wing, intelligent skin, vibration and noise measurement, etc. [0005] In 2012, Moore et al. (Moore J P, Rogge M D. Shapesensing using multi-core fiber optic cable and parametric cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16G01B11/255G01B11/00G01D5/353G02B6/02G02B6/255
Inventor 苑立波王洪业刘银
Owner GUILIN UNIV OF ELECTRONIC TECH
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