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Composite sensor for monitoring tensile strain vector and preparation method thereof

A composite sensor and tensile strain technology, applied in the field of intelligent sensing, can solve the problems of lack of irregular strain size and direction vector detection ability, and achieve the effects of improving detection accuracy, easy preparation and low cost

Pending Publication Date: 2022-05-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional strain sensors can only detect uniaxial strain, and lack vector detection capabilities for irregular strain magnitude and direction

Method used

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  • Composite sensor for monitoring tensile strain vector and preparation method thereof
  • Composite sensor for monitoring tensile strain vector and preparation method thereof
  • Composite sensor for monitoring tensile strain vector and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation process of the top encapsulation layer, the bottom encapsulation layer and the insulating layer (isotropic functional layer) in the embodiment of the present invention is as follows:

[0042] (1) Weigh 2.0 g of polyurethane granules, 3.2 g of dimethylformamide, and 4.8 g of tetrahydrofuran into a glass bottle, put them into a magnet and stir to dissolve. During the dissolution process, the speed is 600 rpm, the heating temperature is 60 °C, and the magnetic stirring time After stirring, the polyurethane solution was allowed to stand for 2 hours to remove internal air bubbles.

[0043] (2) The stretchable substrate of the sensing layer was prepared by the electrospinning process. During the electrospinning process, the electrospinning voltage was set to 20 kV, the feeding volume was 0.6 ml / h, and the receiving drum speed was 100 rpm. The spinning time was 8 hours. After electrospinning, the polyurethane fiber substrate was peeled off from the aluminum foil...

Embodiment 2

[0046] The preparation process of the anisotropic sensing layer is as follows:

[0047] (1) Weigh 2.0 g of polyurethane granules, 3.2 g of dimethylformamide, and 4.8 g of tetrahydrofuran into a glass bottle, put them into a magnet and stir to dissolve. During the dissolution process, the speed is 600 rpm, the heating temperature is 60 °C, and the magnetic stirring time After stirring, the polyurethane solution was allowed to stand for 2 hours to remove internal air bubbles.

[0048] (2) The stretchable substrate of the sensing layer was prepared by the electrospinning process. During the electrospinning process, the electrospinning voltage was set to 20 kV, the feeding volume was 0.6 ml / h, and the receiving drum speed was 2500 rpm. The spinning time was 8 hours. After electrospinning, the polyurethane fiber substrate was peeled off from the aluminum foil in deionized water, transferred to a polytetrafluoroethylene plate for vacuum drying, and the drying temperature was set at...

Embodiment 3

[0052] The preparation process of a composite sensor for tensile strain vector detection according to the embodiment of the present invention is as follows:

[0053] (1) Weigh 2.0 g of polyurethane granules, 3.2 g of dimethylformamide, and 4.8 g of tetrahydrofuran into a glass bottle, put them into a magnet and stir to dissolve. During the dissolution process, the speed is 600 rpm, the heating temperature is 60 °C, and the magnetic stirring time After stirring, the polyurethane solution was allowed to stand for 2 hours to remove internal air bubbles.

[0054] (2) The top encapsulation layer, bottom encapsulation layer and spacer layer were prepared by electrospinning process. During the electrospinning process, the electrospinning voltage was set to 20 kV, the feed rate was 0.6 ml / h, and the speed of the receiving drum was 100 rpm , and the electrospinning time was 8 hours. After electrospinning, the polyurethane fiber film was peeled off from the aluminum foil in deionized w...

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Abstract

The invention relates to the field of intelligent sensing, and provides a composite sensor for tensile strain vector monitoring and a preparation method thereof.The composite sensor comprises a top packaging layer, sensing layers, an insulating layer between the sensing layers and a bottom packaging layer which are sequentially arranged from top to bottom; the top packaging layer, the insulating layer and the bottom packaging layer are all made of stretchable insulating materials with isotropic mechanical properties. The sensing layer is made of a conductive material with anisotropic electrical properties, and can perform double response on the magnitude and direction of tensile strain; the sensing layers are vertically arranged in a laminated mode, and the included angle between every two adjacent sensing layers is the ratio of 180 degrees to the number of the sensing layers. According to the invention, by measuring the resistance change signal of each sensing layer, vector monitoring can be carried out on any tensile strain in a plane, and the magnitude and direction of the tensile strain can be calculated. The sensor is high in sensitivity and response speed, has good durability and service stability, and has important application prospects in the fields of multi-degree-of-freedom mechanical interfaces, human body multi-dimensional action fine perception and the like.

Description

technical field [0001] The invention relates to the technical field of intelligent sensing, in particular to a composite sensor for tensile strain vector monitoring and a preparation method thereof. Background technique [0002] Occupational musculoskeletal disorders have now become the world's most frequently occurring occupational disease. As the most common and expensive occupational disease in the world, it seriously affects the work efficiency and physical and mental health of workers, and has caused huge direct and economic losses to the country. indirect economic loss. Therefore, there is an urgent need to develop a tensile strain vector sensor device that can finely monitor the state of joint motion in daily activities for the prevention and auxiliary treatment of occupational musculoskeletal disorders. In addition, this type of sensor can be used in multi-degree-of-freedom mechanical strain monitoring The field of unconventional sensing technology also has a wide r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16A61B5/11B32B27/02B32B27/12B32B27/40B32B37/06B32B37/10D01F6/70D04H1/728D04H1/4358
CPCG01B7/18A61B5/11B32B5/022B32B5/26B32B37/06B32B37/10D01F6/70D04H1/728D04H1/4358B32B2262/0292
Inventor 张跃徐良旭廖庆亮赵璇李琪赵浩然苏兆洋高禄森任可
Owner UNIV OF SCI & TECH BEIJING
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