A king-shaped optical fiber grating sensor patch

A fiber grating and king-shaped technology, which is applied to the field of the king-shaped fiber grating sensor patch, can solve the problems of high manufacturing difficulty, high sensor manufacturing cost, uneven force on the fiber grating part, etc., so as to prevent uneven force and expand The effect of the scope of application

Active Publication Date: 2017-05-10
GUANGZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this sensor has the following technical problems: 1. The measured strain result is superimposed by temperature and stress, and it is impossible to distinguish the two measurement results; Uniform and uneven force produces chirp phenomenon
However, this kind of sensor is expensive to make, difficult to make, and not suitable for surface sticking

Method used

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  • A king-shaped optical fiber grating sensor patch
  • A king-shaped optical fiber grating sensor patch
  • A king-shaped optical fiber grating sensor patch

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Experimental program
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Embodiment Construction

[0038] The present invention will be further described below in conjunction with drawings and embodiments.

[0039] Such as Figure 1-Figure 3 The king-shaped optical fiber grating sensor patch shown in the figure has a symmetrical king-shaped structure as a whole. A connecting portion 11, the strain temperature horizontal edge 1 is connected to the single temperature horizontal edge 2 through the connecting portion 11, and the single temperature horizontal edge 2 is connected to the sticking edge 3 through another connecting portion 11, wherein,

[0040] There is a first horizontal strip-shaped hole 6 inside the strain temperature horizontal side 1, the left-right symmetrical centerline of the first strip-shaped hole 6 overlaps with the left-right symmetrical centerline of the patch, and the two sides of the first strip-shaped hole 6 are useful The cross-section of the square groove 4 is a square, and the fiber grating connected between the two sections of the conductive fib...

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Abstract

The invention discloses a king-shaped optical fiber grating sensor patch. The patch has a symmetrical king-shaped structure as a whole. There are two connecting parts, the strain temperature horizontal side is connected to the single temperature horizontal side through the connecting part, and the single temperature horizontal side is connected to the pasting side through another connecting part. The fiber grating in the second hole of the patch can directly measure the temperature of the structure, and the result of the fiber grating in the first hole can be subtracted from the result of the fiber grating in the second hole to get the strain of the structure, which can prevent the fiber The grating produces a chirp phenomenon, and the size of each part of the patch can be designed according to the measurement requirements of different occasions combined with the average strain transfer rate formula, so that the size of the patch is small and suitable for pasting.

Description

technical field [0001] The invention relates to the technical field of fiber grating sensor installation, in particular to a king-shaped fiber grating sensor patch. Background technique [0002] In recent years, fiber optic sensing, especially fiber grating sensing, has been more and more widely used in engineering detection due to its advantages of anti-electromagnetic interference, corrosion resistance, electrical insulation, high sensitivity and distributed large-scale measurement. In practical applications, the fiber grating can be directly pasted on the surface of the structure to accurately measure the axial strain of the shaft. But because the bare optical fiber is very slender and the main component is silica, it is particularly fragile, especially its shear resistance is very poor, and it is easy to damage the fiber grating directly on the surface of the structure to be tested. In order to solve this problem, Zhan Yage, Cai Haiwen and others proposed an aluminum sl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/16
Inventor 朱萍玉申昊文许沛胜杨志超施维宋坤张文力
Owner GUANGZHOU UNIVERSITY
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