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

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

Active Publication Date: 2022-04-08
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 spring structure, preparation method and application
  • Piezoresistive sensor based on conductive hydrogel double-tower spring structure, preparation method and application
  • Piezoresistive sensor based on conductive hydrogel double-tower spring structure, preparation method and application

Examples

Experimental program
Comparison scheme
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 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 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 spring structure, a preparation method and an application; the sensor includes a concave double tower spring, and the concave double tower spring is a combination of two tower springs The small-diameter ends are connected to form an integrated spring structure, with a conductive hydrogel layer on the surface of the concave double-tower spring, and a conductive electrode plate is respectively fixed on the two large-diameter ends of the concave double-tower spring; the sensor uses The difference in the spring stiffness coefficient of each coil in the concave double-tower spring, under the action of different pressures, presents different effective resistances due to the difference in the area of ​​the coil contacting the plate, thereby realizing the sensing function. Due to the difference in the stiffness coefficients of the inner and outer coils of the spring in the sensor of the present invention, the coils of the tower-shaped spring are constantly in contact with the pole plates under the condition of gradual loading force, causing the current passing through the device to change. It can provide a new solution for the health monitoring of gaps in cultural relics, and 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 Patents(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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