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Method for manufacturing piezoresistive sensor by controlling three-dimensional conductive gauze structure

A technology of piezoresistive sensor and conductive yarn, applied in the direction of instrument, measuring force, measuring device, etc., can solve the problems of low cost and achieve the effect of wide detection range and flexible design

Active Publication Date: 2018-12-28
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a method for manufacturing a piezoresistive sensor by controlling a three-dimensional conductive gauze structure. The wide detection range and high compression piezoresistive sensor obtained by the method has the advantages of flexible design, easy manufacture, high sensitivity, long service life, and low cost. Low and universal, it solves the above-mentioned shortcomings of existing piezoresistive sensors

Method used

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  • Method for manufacturing piezoresistive sensor by controlling three-dimensional conductive gauze structure
  • Method for manufacturing piezoresistive sensor by controlling three-dimensional conductive gauze structure
  • Method for manufacturing piezoresistive sensor by controlling three-dimensional conductive gauze structure

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Embodiment 1

[0055] Polyurethane elastic fibers with a length of 1m are evenly interspersed and wound on the porous polyethylene ring from top to bottom in a "Z" shape to construct a three-dimensional gauze structure. The diameter of the ring is 32mm and the height is 11.5mm. The 4*20 matrix array is evenly arranged. To configure carbon black suspension, add 0.2448g superconducting carbon black BP2000 (CB) to 800mL with a concentration of 0.613mg.mL -1 In the CNC suspension, the mixture was ultrasonically treated for 30 minutes with the stirrer rotating at 200r / min and the power at 1200w, and finally a completely suspended negatively charged CB@CNC suspension was obtained. Add 0.2448g CB to 800mL with a concentration of 0.613mg.mL -1 In the CS suspension, the mixture was sonicated for 30 minutes with the stirrer rotating at 200r / min and the power at 1200w, and finally a completely suspended positively charged CB@CS suspension was obtained. The three-dimensional gauze structure was then w...

Embodiment 2

[0057] Polyurethane elastic fibers with a length of 1m are evenly interspersed and wound on the porous polyethylene ring from top to bottom in a "Z" shape to construct a three-dimensional gauze structure. The diameter of the ring is 32mm and the height is 11.5mm. The 4*20 matrix array is evenly arranged. To configure carbon black suspension, add 0.2448g superconducting carbon black BP2000 (CB) to 800mL with a concentration of 0.613mg.mL -1 In the CNC suspension, the mixture was ultrasonically treated for 30 minutes with the stirrer rotating at 200r / min and the power at 1200w, and finally a completely suspended negatively charged CB@CNC suspension was obtained. Add 0.2448g CB to 800mL with a concentration of 0.613mg.mL -1 In the CS suspension, the mixture was sonicated for 30 minutes with the stirrer rotating at 200r / min and the power at 1200w, and finally a completely suspended positively charged CB@CS suspension was obtained. The three-dimensional gauze structure was then w...

Embodiment 3

[0059] Polyurethane elastic fibers with a length of 9m are evenly interspersed and wound on the porous polyethylene ring from top to bottom in a "Z" shape to construct a three-dimensional gauze structure. The diameter of the ring is 32mm and the height is 11.5mm. The 4*20 matrix array is evenly arranged. To configure carbon black suspension, add 0.2448g superconducting carbon black BP2000 (CB) to 800mL with a concentration of 0.613mg.mL -1 In the CNC suspension, the mixture was ultrasonically treated for 30 minutes with the stirrer rotating at 200r / min and the power at 1200w, and finally a completely suspended negatively charged CB@CNC suspension was obtained. Add 0.2448g CB to 800mL with a concentration of 0.613mg.mL -1 In the CS suspension, the mixture was sonicated for 30 minutes with the stirrer rotating at 200r / min and the power at 1200w, and finally a completely suspended positively charged CB@CS suspension was obtained. The three-dimensional gauze structure was then w...

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Abstract

The invention provides a method for manufacturing a piezoresistive sensor by controlling a three-dimensional conductive gauze structure. The method comprises the following steps: designing a pluralityof circular holes on a plastic circular ring, and interspersing and twining elastic fibers into a controllable three-dimensional net structure; loading a carbon black layer on an elastic yarn networkvia an electrostatic deposition method to form a conductive network; and forming a conductive node through the effective contact between conductive fiber networks, changing the current flow directionat the node, reducing the length of an effective conductive path, changing the resistance value of the sensor, and generating a corresponding electrical performance response signal. According to themethod provided by the invention, the advantages of the controllable net structure and a highly elastic conductive fiber material are combined to manufacture the piezoresistive sensor with a wide detection range and high compression. The actively controllable elastic fiber net is not limited by the volume of the material and can be substantially compressed. Furthermore, the piezoresistive sensor obtained by the method provided by the invention has the advantages of flexible design, low cost, high sensitivity and high stability.

Description

technical field [0001] The invention belongs to the technical field of piezoresistive sensors, in particular to a method for manufacturing piezoresistive sensors by controlling a three-dimensional conductive gauze structure. Background technique [0002] Pressure sensors with wide detection range and high compressibility are highly desired in future small sensor devices. Various pressure-sensing mechanisms including transistor sensing, capacitive sensing, piezoelectric sensing, triboelectric sensing[, and piezoresistive sensing mechanisms are continuously being applied to the manufacture of pressure sensors with excellent performance, especially piezoresistive sensors, It has attracted extensive attention due to its simple device structure and low energy consumption. [0003] Existing piezoresistive sensors mainly include conductive polymer films and various flexible sensors, etc. These sensors can already meet people's performance requirements for high sensitivity. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/22
CPCG01L1/22
Inventor 刘纯国陈星潼刘硕吕冰
Owner JILIN UNIV
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