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Optical fiber raster sensor patch shaped like a Chinese character 'wang'

A fiber grating and king-shaped technology, which is applied in the field of king-shaped fiber grating sensor patches, can solve the problems of difficult production, high sensor production cost, and inability to distinguish measurement results, so as to expand the scope of application and prevent uneven force Effect

Active Publication Date: 2015-04-29
GUANGZHOU UNIVERSITY
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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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  • Optical fiber raster sensor patch shaped like a Chinese character 'wang'
  • Optical fiber raster sensor patch shaped like a Chinese character 'wang'
  • Optical fiber raster sensor patch shaped like a Chinese character 'wang'

Examples

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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 an optical fiber raster sensor patch shaped like a Chinese character 'wang'. The whole patch is of a left-right symmetrical structure shaped like the Chinese character 'wang', and the patch is of an integrally formed structure. The patch comprises a stress temperature transverse edge, a single temperature transverse edge, a pasting edge and two connection portions. The stress temperature transverse edge is connected with the single temperature transverse edge through one of the connection portions, and the single temperature transverse edge is connected with the pasting edge trough the other connection portion. According to the patch, an optical fiber raster of a second strip-shaped hole can directly measure the temperature of the structure, the stress of the structure can be obtained by subtracting the result of the optical fiber raster of the second strip-shaped hole from the result of the optical fiber raster of a first strip-shaped hole, chirping of the optical fiber raster can be prevented, the size of all parts of the patch can be designed according to the measurement requirements of different occasions in combination with an average strain transfer rate equation, and the patch is made to be compact in size 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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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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