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Calibration method for large strain measurement of surface-mounted polymer optical fiber sensor

A fiber optic sensor, polymer technology, applied in instruments, special data processing applications, electrical digital data processing, etc., can solve problems such as large deviations, difficult strain transfer modeling, and complex strain transfer relationships in viscoelastic materials.

Active Publication Date: 2021-06-11
XI AN JIAOTONG UNIV
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  • Claims
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Problems solved by technology

The traditional sensor calibration under small strain conditions is relatively easy, and it is easy to obtain through fitting and interpolation calculations within the monitoring range. This method has a large deviation when measuring large strains
2. The strain transfer relationship of viscoelastic materials is complex
The traditional silica optical fiber is an elastic body in the working range, while the mechanical properties of the polymer optical fiber material are viscoelastic, which brings difficulties to the modeling of strain transfer

Method used

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  • Calibration method for large strain measurement of surface-mounted polymer optical fiber sensor
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  • Calibration method for large strain measurement of surface-mounted polymer optical fiber sensor

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Embodiment Construction

[0065] The following will refer to the attached Figure 1 to Figure 4 Specific examples of the present invention are described in more detail. Although specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and is not limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0066] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that they may use different terms to refer to the same component. The specification and claims do not use differences in nouns as a way of distinguishing components, but use differences in functions of components as a criterion for distinguishing. "Includes" or "comprises" mentioned throughout ...

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Abstract

The invention discloses a calibration method for large strain measurement of a surface-mounted polymer optical fiber sensor, and the method comprises: building a five-layer bonding structure model based on the surface-mounted polymer optical fiber sensor, enabling the five-layer bonding structure model to comprise an optical fiber layer, a half-moon-shaped glue layer, a substrate layer, a middle bonding layer and a matrix layer, and carrying out strain transfer analysis on the five-layer pasting structure model by using a linear viscoelastic shear hysteresis method so as to establish an axial strain transfer model; and analyzing the strain transmissibility and the average strain transmissibility under transient response and quasi-static response based on an axial strain transmission model so as to calibrate large strain measurement data of the surface-mounted polymer optical fiber sensor.

Description

technical field [0001] The invention belongs to the field of structural health monitoring and detection, in particular to a calibration method for large strain measurement of a surface-adhesive polymer optical fiber sensor. Background technique [0002] Advanced resin-based composite materials have unique advantages such as high specific strength and specific stiffness, strong designability, good fatigue fracture resistance, corrosion resistance, good structural and dimensional stability, and easy large-area overall forming. Fiber wound composite materials for solid rocket motors Widely used on housings. However, composite materials have the characteristics of heterogeneity, anisotropy, and large process discreteness. Due to process reasons and human factors in the molding process of the fiber-wound composite material shell structure, defects such as pores, inclusions, and delamination are easily formed inside. ;In the process of transportation and storage, damages such as ...

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Application Information

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IPC IPC(8): G06F30/20G06F113/26G06F119/14
CPCG06F30/20G06F2113/26G06F2119/14Y02T90/00
Inventor 李明耿佳刘金鑫刘一龙张兴武杨志勃宋志平陈雪峰
Owner XI AN JIAOTONG UNIV
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