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Piezoresistive sensor based on conductive hydrogel double-tower type spring structure, preparation method and application

A conductive hydrogel and piezoresistive sensor technology, applied in the field of sensors, can solve problems such as impact on viewing, large area, and damage to installation, and achieve the effects of simple production, simple production method, and great application prospects.

Active Publication Date: 2021-10-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still problems that the area is too large and needs to be fixed on the surface, which not only needs to damage the installation and affect the view, but also puts forward higher requirements for the fixing method

Method used

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  • Piezoresistive sensor based on conductive hydrogel double-tower type spring structure, preparation method and application
  • Piezoresistive sensor based on conductive hydrogel double-tower type spring structure, preparation method and application
  • Piezoresistive sensor based on conductive hydrogel double-tower type spring structure, preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1. The spring body of the double-tower spring structure is a spiral double-tower structure, and the shape is that the small diameter ends of the two tower-shaped springs are connected. The whole spring is wound by a spring wire, and the wire diameter of the spring body is 0.3 mm, the small outer diameter is 4mm, the largest outer diameter is 10mm, the radial pitch is 0.5mm, the axial pitch is 0.5mm, and the total number of coils is 12.

[0028] 2. Weigh 2g of acrylamide, 2g of acrylic acid, and 3.7g of nickel chloride hexahydrate, put them in a beaker a filled with 10mL of deionized water to dissolve, add a magnet and stir on a magnetic stirrer until the solids are completely dissolved; then in the above Add 0.008g of N,N-methylenebisacrylamide powder into the solution, drop into 0.4mL of tetramethylethylenediamine solution, stir magnetically again until all the solids are dissolved; put the prepared solution into a vacuum drying oven to drain Air for 10 minutes. Weigh...

Embodiment 2

[0033] 1. The spring body of the double-tower spring structure is a spiral double-tower structure, and the shape is that the small diameter ends of the two tower-shaped springs are connected. The whole spring is wound by a spring wire, and the wire diameter of the spring body is 0.3 mm, the small outer diameter is 4mm, the largest outer diameter is 10mm, the radial pitch is 0.5mm, the axial pitch is 0.5mm, and the total number of coils is 12.

[0034] 2. Weigh 2g of acrylamide, 2g of acrylic acid, and 3.7g of nickel chloride hexahydrate, put them in a beaker a filled with 10mL of deionized water and dissolve them, add magnets and stir on a magnetic stirrer until the solids are completely dissolved; then in the above Add 0.008g of N,N-methylenebisacrylamide powder into the solution, drop into 0.4mL tetramethylethylenediamine solution, stir magnetically again until all the solids are dissolved; put the prepared solution into a vacuum drying oven to drain Air for 10 minutes. Wei...

Embodiment 3

[0039] 1. The spring body of the double-tower spring structure is a spiral double-tower structure, and the shape is that the small diameter ends of the two tower-shaped springs are connected. The whole spring is wound by a spring wire, and the wire diameter of the spring body is 0.3 mm, the small outer diameter is 4mm, the largest outer diameter is 10mm, the radial pitch is 0.5mm, the axial pitch is 0.5mm, and the total number of coils is 12.

[0040] 2. Weigh 2g of acrylamide, 2g of acrylic acid, and 5.54g of nickel chloride hexahydrate, and dissolve them in a beaker a filled with 10mL of deionized water, add magnets and stir on a magnetic stirrer until the solids are completely dissolved; then in the above Add 0.008g of N,N-methylenebisacrylamide powder into the solution, drop into 0.4mL of tetramethylethylenediamine solution, stir magnetically again until all the solids are dissolved; put the prepared solution into a vacuum drying oven to drain Air for 10 minutes. Weigh 0....

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Abstract

The invention discloses a piezoresistive sensor based on a conductive hydrogel double-tower type spring structure, a preparation method and application. The sensor comprises a middle-concave double-tower-shaped spring, the middle-concave double-tower-shaped spring is of an integrated spring structure formed by connecting the small-diameter ends of two tower-shaped springs, a conductive hydrogel layer is arranged on the surface of the middle-concave double-tower-shaped spring, and a conductive polar plate is fixed to each of the two large-diameter ends of the middle-concave double-tower-shaped spring; according to the sensor, the difference of stiffness coefficients of all rings of springs in the middle-concave double-tower-shaped spring is utilized, and under the action of different pressures, different effective resistances are presented due to different contact areas of coils and polar plates, so that the sensing effect is realized. According to the sensor, due to different stiffness coefficients of the inner coil and the outer coil of the spring, the coil of the tower-shaped spring is continuously contacted with the polar plate under the condition of gradually loading force, so that the current passing through the device changes. A new solution thought can be provided for health monitoring of cultural relic gaps, and the sensor has great application prospects.

Description

technical field [0001] The invention belongs to the technical field of sensors, and relates to a piezoresistive sensor based on a conductive hydrogel double-tower spring structure, a preparation method and an application. The sensor has a simple preparation method, a high measuring range, and good expandability; it can be used for monitoring small-sized cracks. Background technique [0002] At present, many technologies have been proposed at home and abroad to detect cracks in different scenarios, which can be roughly divided into two types: embedded and external, among which embedded includes feeler gauges and distributed optical fibers. Among them, the accuracy of the feeler gauge is limited, and the hardness of the test unit is relatively high, which will inevitably cause more irreversible damage during the measurement process. Although distributed optical fiber sensing technology can achieve high-precision and high-speed detection, the sensor and power supply module need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/04G01N15/08G01B7/14
CPCG01N27/041G01N15/088G01B7/14
Inventor 鲍同乐闫祺珑陈旻娄翔王宗荣范宏董亚波
Owner ZHEJIANG UNIV
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