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Soft pressure-sensitive probe with small electrodes on the same surface and its development method

A small electrode, soft technology, applied in the field of measurement, can solve the problems of increasing the complexity of the sensor sensitive unit, the adverse effect of the softness of the pressure sensitive unit, and the large time dependence of the output resistance, so as to reduce the time dependence and facilitate the output resistance range. , the effect of reducing adverse effects

Inactive Publication Date: 2016-02-17
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the pressure sensitive units made of this sensitive material currently adopt a sandwich structure, that is, the sensitive material is placed between two layers of metal electrodes, and then encapsulated with an insulating film, thus increasing the complexity of the sensor sensitive unit , and increase its thickness
In recent years, some research institutions have tried to design the electrodes on the same surface of the sensitive material. This method reduces the thickness of the sensitive unit, but the electrode area accounts for a large proportion of the sensitive material area, which affects the flexibility of the pressure sensitive unit. Adverse effects, and its output resistance has a large time dependence, which seriously reduces the monitoring accuracy of static pressure

Method used

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  • Soft pressure-sensitive probe with small electrodes on the same surface and its development method
  • Soft pressure-sensitive probe with small electrodes on the same surface and its development method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1), a circular copper foil electrode with a diameter of 6 mm and a lead wire with a length of 8 cm are laminated on the polyimide film as the bottom polyimide film, and placed on the program-controlled lifting table on a fixed platform;

[0021] (2), be that the carbon black of 20 nanometers, room temperature vulcanization silicone rubber and organic solvent are mixed by the volume ratio of 1: 16: 960 with particle diameter, utilize mechanical stirring and ultrasonic vibration to make nano carbon black powder disperse in mixed solution, and Under the action of tetraethyl orthosilicate and dibutyltin dilaurate, a nano-carbon black / silicone rubber composite colloidal sticky substance is formed;

[0022] (3), uniformly coat the nano-carbon black / silicone rubber composite colloidal viscous material on the bottom polyimide film prepared in step (1), and fix it on the movable platform of the program-controlled lifting platform by microcomputer control The smooth and rigid f...

Embodiment 2

[0027] (1), a circular copper foil electrode with a diameter of 5 mm and a lead wire with a length of 9 cm are laminated on the polyimide film as the bottom polyimide film, and placed on the program-controlled lifting table on a fixed platform;

[0028] (2) Mix multi-walled carbon nanotubes with an aspect ratio of 300, room temperature vulcanized silicone rubber and an organic solvent at a volume ratio of 1:20:800, and disperse the nano conductive powder in the mixed solution by mechanical stirring and ultrasonic oscillation , and under the action of ethyl orthosilicate and dibutyltin dilaurate, a multi-walled carbon nanotube / silicone rubber composite gel-like sticky substance is formed;

[0029] (2), mixing multi-walled carbon nanotubes with an aspect ratio of 300, room temperature vulcanized silicone rubber and n-hexane organic solvent in a volume ratio of 1: 20: 800, using mechanical stirring and ultrasonic vibration to make multi-walled carbon nanotubes powder Disperse in...

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Abstract

The invention relates to a co-planar small electrode type soft pressure-sensitive probe, which belongs to the technical field of measurement. The pressure-sensitive probe includes a top layer of polyimide film, a pressure-sensitive film composed of nano conductive polymer composite materials, and a bottom layer of polyimide film covered with a pair of electrodes. The two electrodes on the underlying polyimide film are located on the same end side of the same surface of the pressure-sensitive film, and the electrode area is much smaller than the area of ​​the pressure-sensitive film. The pressure-sensitive probe developed using the method proposed by the present invention has the advantages of high flexibility, thin thickness, simple structure, and low cost, and is particularly suitable for interlayer pressure measurement on narrow curved surfaces of large industrial equipment and the development of electronic skins.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a soft sensor preparation process. Background technique [0002] Nano conductive polymer composites have piezoresistive properties, easy processing and flexibility. Therefore, this material can be used as a sensitive material for thin and soft pressure sensors, and can be widely used in national defense, industry and civilian fields. Such as: pressure monitoring between layers of narrow curved surfaces of large equipment, development of artificial electronic skin, etc. However, most of the pressure sensitive units made of this sensitive material currently use a sandwich structure, that is, the sensitive material is placed between two layers of metal electrodes, and then encapsulated with an insulating film, thus increasing the complexity of the sensor sensitive unit , and increase its thickness. In recent years, some research institutions have tried to design t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/16
Inventor 王璐珩
Owner NORTHEASTERN UNIV LIAONING
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