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A vector strain gauge based on micro-nano multi-core special optical fiber

A technology of special optical fiber and multi-core optical fiber, which is applied in the field of sensing, can solve the problems of low sensitivity of optical fiber stress sensor and the inability to detect the direction of stress, and achieve the effects of promoting development, enhancing flexibility, and improving sensitivity

Active Publication Date: 2021-10-15
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The invention solves the problems of low sensitivity of the traditional optical fiber stress sensor and the inability to realize the detection of the stress direction, and proposes a vector strain gauge based on micro-nano multi-core special optical fiber

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  • A vector strain gauge based on micro-nano multi-core special optical fiber
  • A vector strain gauge based on micro-nano multi-core special optical fiber
  • A vector strain gauge based on micro-nano multi-core special optical fiber

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Embodiment Construction

[0021] Specific embodiments of the present invention will be described in detail below through technical texts and drawings.

[0022] As shown in the figure, a vector strain gauge based on the micro-nano multi-core special optical fiber of the present invention has a main body that is a cascaded structure obtained by welding the micro-nano multi-core special optical fiber 5 with the single-mode optical fiber A2 and the single-mode optical fiber B6; The broadband light source 11 emits light signals, and after passing through the cascade structure, a set of output spectra will be obtained on the spectrum analyzer 12, and when the external pressure acts on the cascade structure, it will deform and bend, so that the output spectrum is consistent with zero There is an offset when the pressure is on.

[0023] Among them, with the bending of the cascaded structure of the grating 1, the characteristic wavelength on its interference spectrum will move by Δλ 1 , the distance between th...

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Abstract

The present invention proposes a vector stressometer based on the micro -nathery special optical fiber, which melts single -mode fiber A, single -mode optical fiber B and micro -naphthalete special optical fiber., A central fiber and multi -core optical fiber layer, coating the polymer on the surface, and the surface of the polymer engraved the grating.First of all, the light -emitted light from the broadband light source enters the fiber A core A of the single -mode fiber A full reflection transmission. When the light reaches the melting point, some light enters the micro -natal core special optical fiber, which are in the four packets and the core of the central fiber core, respectively.Transfer in the multi -core fiber optic layer; another part of the light enters the polymer transmission and is modulated by the grating in real time.All optical signals returned to the spectrum analyzer after single -mode fiber B and Fiber B to get the transmission spectrum.The stressometer adopts a full fiber structure design, which has high sensitivity and flexible and easy -to -package characteristics. It can be used for wearable behavior monitoring and auxiliary equipment to achieve perception and interaction of the direction and size of the stress.

Description

technical field [0001] The invention belongs to the field of sensing technology, and relates to a cascaded structure composed of a micro-nano multi-core special optical fiber and a single-mode optical fiber, in particular to a vector strain gauge based on the cascaded structure, which can be used for wearable behavior monitoring and auxiliary equipment , to realize the perception and interaction of the force direction and magnitude. Background technique [0002] As early as the 1970s, Corning Corporation of the United States produced the first low-loss optical fiber. The typical optical fiber has a single-core structure, while the multi-core special optical fiber has a common outer cladding and contains multiple cores. The core has its own inner cladding. Although the production cost of this kind of multi-core special fiber is higher than that of single-core fiber, it has some special properties that single-mode fiber does not have, and has a broader application prospect. E...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/24G02B6/02
CPCG01L1/242G02B6/02042G02B6/02061G02B6/02395
Inventor 李晋李鑫王清晨余乐
Owner NORTHEASTERN UNIV LIAONING
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