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FBG (fiber bragg grating) strain sensor

A strain sensor, fiber grating technology, applied in the field of sensors

Pending Publication Date: 2016-06-01
BEIHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing fiber grating strain sensors usually can only measure the strain in a single direction of the structure to be measured, but in engineering practice, it is often necessary to measure the strain in multiple directions of a single structure or between two structures to meet the safety requirements of structural engineering. Monitoring needs to avoid engineering accidents

Method used

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  • FBG (fiber bragg grating) strain sensor
  • FBG (fiber bragg grating) strain sensor
  • FBG (fiber bragg grating) strain sensor

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Embodiment Construction

[0031] The core of the invention is to provide a fiber grating strain sensor, which can realize strain measurement in multiple directions of the structure to be measured.

[0032] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] Please refer to Figure 1-Figure 5 , figure 1 It is an axonometric schematic diagram of a specific embodiment of the fiber grating strain sensor provided by the present invention; figure 2 It is a front view of a specific embodiment of the optical fiber optical strain sensor provided by the present invention; Figure 3 to Figure 5 respectively figure 2 Middle A-A, B-B and C-C sectional views.

[0034] As shown in the figure, in a specific embodiment, the fiber grating strain sensor includes a cover body 10 and a seat body 20, and a pillar 30 and a pl...

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Abstract

The invention discloses an FBG (fiber bragg grating) strain sensor. The FBG strain sensor comprises a cover body, a seat body, a support column disposed between the cover body and the seat body, and a plurality of force-sensitive elements disposed between the cover body and the seat body same and arranged around the periphery of the support column; and an outer side face of each force-sensitive element is provided with an FBG patch sensor, and all the FBG patch sensors are connected in series. Through application of the FBG strain sensor, strain measurement for a to-be-tested structure in multiple directions can be achieved.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to an optical fiber grating strain sensor. Background technique [0002] In engineering applications, real-time online monitoring of structural engineering is required to avoid structural engineering accidents, such as broken bridges and house collapses. [0003] Compared with conventional sensors, the fiber grating sensor with fiber grating as the sensing element has obvious advantages in anti-electromagnetic interference, high temperature resistance, corrosion resistance, small size, etc., so it has been widely used in structural safety monitoring . [0004] Existing fiber grating strain sensors usually can only measure the strain in a single direction of the structure to be measured, but in engineering practice, it is often necessary to measure the strain in multiple directions of a single structure or between two structures to meet the safety requirements of structural engineer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16
Inventor 汪苏许会超苗新刚赵保军贺京杰
Owner BEIHANG UNIV
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