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Intelligent hydrogel optical fiber sensor and preparation device and preparation method thereof

A fiber optic sensor and hydrogel technology, which is applied in the direction of measurement of the change force of the optical properties of the material when it is stressed, can solve the problems of delamination, inaccurate detection data of smart hydrogel fiber optic sensors, and smart hydrogel Problems such as failure of attachment to the surface of the sensing fiber achieve low cost, good repeatable response, and reliable repeatable measurement

Active Publication Date: 2022-07-29
威海长和光导科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual use process, when the smart hydrogel senses external changes, its volume shrinks or swells repeatedly, and the surface adhesion between the smart hydrogel and the sensing optical fiber is prone to failure, and delamination occurs, which eventually leads to the failure of the smart hydrogel. The detection data of the gel fiber optic sensor is inaccurate

Method used

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  • Intelligent hydrogel optical fiber sensor and preparation device and preparation method thereof
  • Intelligent hydrogel optical fiber sensor and preparation device and preparation method thereof
  • Intelligent hydrogel optical fiber sensor and preparation device and preparation method thereof

Examples

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Embodiment 1

[0037] Depend on Figure 1 to Figure 3 As shown, the present invention provides an intelligent hydrogel optical fiber sensor, which includes a PDMS sponge layer 1, a PDMS elastomer layer 2, a sensing optical fiber 3, and the PDMS sponge layer 1 and the PDMS elastomer layer 2 are connected by upper and lower layers, forming an integrated type. Structure; PDMS sponge layer 1 is provided with reticulated pores along the three-dimensional direction, and the pores are filled with intelligent hydrogel 4; PDMS elastomer layer 2 is provided with a channel 21 for the sensing fiber 3 to penetrate into and out, PDMS elastomer The layer 2 is closely connected with the sensing fiber 3 disposed therein, and the sensing region 31 of the sensing fiber 3 is tightly connected and disposed in the PDMS elastomer layer 2 .

[0038] The present invention is devoted to the research on the asymmetric stress caused by the volume change of the smart hydrogel: since the PDMS sponge layer 1 of the presen...

Embodiment 2

[0048] Depend on Figure 4 , Figure 5 As shown, the present invention provides a preparation device for an intelligent hydrogel optical fiber sensor, which is provided with a worktable 6, and a forming mold 7 is installed on the worktable 6, and the forming mold 7 is used for forming the intelligent hydrogel optical fiber sensor. There is an optical fiber clamp 8 on both sides of the forming mold 7, and the optical fiber clamp 8 is used as an optical fiber fixing clamp for clamping the sensing optical fiber 3 on both sides of the forming mold 7, so that the optical fiber clamp 8 between the two optical fiber clamps 8 is used. The sensing fiber 3 is always in a straight state. The forming mold 7 is a box-shaped structure with an open top, and the forming mold 7 is provided with a cuboid inner cavity 9, and the cuboid inner cavity 9 is sequentially provided with a connected PDMS elastomer layer filling cavity 91 and a PDMS sponge layer filling cavity from bottom to top. 92. ...

Embodiment 3

[0057] According to the technical solution of the above-mentioned embodiment 2, and as Figure 4 to Figure 8 For the disclosure and inspiration of the shown molding die 7 and its working principle, those skilled in the art can modify, equivalently replace and improve the molding die 7. No matter what kind of molding die 7 is used, its design points are all derived from the above-mentioned present invention. Invented the preparation principle of smart hydrogel optical fiber sensor. It can be seen that the preparation method of the smart hydrogel optical fiber sensor of the present invention comprises the following steps:

[0058] S1. Fix the sensing fiber 3, so that the middle section of the sensing fiber 3 is in a straight state;

[0059] S2. Pouring the liquid PDMS on the middle section of the sensing fiber 3, which is provided with a sensing area 31, so that the middle section of the sensing fiber 3 is immersed and wrapped in the liquid PDMS, and cured to form a PDMS elasto...

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Abstract

The invention provides an intelligent hydrogel optical fiber sensor as well as a preparation device and a preparation method thereof, and solves the technical problem that an existing intelligent hydrogel optical fiber sensor is easy to cause surface adhesion failure of intelligent hydrogel and a sensing optical fiber and layering, the intelligent hydrogel optical fiber sensor comprises a PDMS (Polydimethylsiloxane) sponge layer, a PDMS elastomer layer and the sensing optical fiber, the PDMS sponge layer and the PDMS elastomer layer are stacked and connected up and down to form an integrated structure, net-shaped pores are formed in the PDMS sponge layer in the three-dimensional direction, and intelligent hydrogel is fully distributed in the pores; the intelligent hydrogel optical fiber sensor comprises a PDMS elastomer layer, a channel for a sensing optical fiber to penetrate in and out is arranged in the PDMS elastomer layer, the PDMS elastomer layer is tightly connected with the sensing optical fiber arranged in the PDMS elastomer layer, and a sensing area of the sensing optical fiber is tightly connected in the PDMS elastomer layer. The method can be widely applied to the technical field of optical fiber sensing.

Description

technical field [0001] The present application relates to the technical field of optical fiber sensing, and in particular, to an intelligent hydrogel optical fiber sensor and a preparation device and preparation method thereof. Background technique [0002] A hydrogel is a polymer with hydrophilic groups that can swell in water to form a three-dimensional network structure and retain a large amount of water. Smart hydrogels are materials that can sense changes in physical quantities such as humidity, pH, stress, and temperature in the external environment, and have reversible responses to external stimuli. When sensing changes, the volume of the smart hydrogel changes significantly, shrinks or swells, and its unique solid-liquid forms transform each other, making the smart hydrogel have functional characteristics such as permeability, swelling, and mechanical properties. Due to the reversible responsiveness of these materials to external stimuli, they are widely used in hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/24
CPCG01L1/242
Inventor 陈卫东王传杰张鹏马飞云张桂林张明立
Owner 威海长和光导科技有限公司