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Integral soft sensing element with pressure and non-contact gap measuring functions

A non-contact, sensing element technology, applied in the field of sensors, can solve problems such as difficult installation, inability to complete non-contact gap measurement, inability to complete pressure measurement, etc., and achieve the effect of thin thickness

Inactive Publication Date: 2014-04-23
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, some scientific research institutions use the piezoresistive effect of conductive polymer composites to achieve pressure measurement, but this method cannot complete non-contact gap measurement
At present, some scientific research institutions use the eddy current effect of planar coils to realize non-contact gap measurement, but this method cannot complete pressure measurement
Therefore, if you want to realize pressure and non-contact gap measurement between narrow curved surface layers, you must use two sets of sensing systems at the same time, so it is difficult to install them in the interlayer structure with very narrow space

Method used

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  • Integral soft sensing element with pressure and non-contact gap measuring functions

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Experimental program
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Effect test

Embodiment 1

[0018] Copper foil coils are laminated on the underlying polyimide film to form a planar eddy current coil film. The thickness of the polyimide film is 12.5 microns, the thickness of the copper foil coil is 10 microns, the number of turns is 50, and the line width is 0.15 mm, the line distance is 0.15 mm; the carbon black powder with an average particle size of 50 nanometers and room temperature vulcanized silicone rubber are mixed in a mass ratio of 0.08:1, and then added to n-hexane; for carbon black / silicone rubber / The mixed solution of n-hexane is stirred by high-power machinery, and at the same time supplemented by ultrasonic vibration, the carbon black is dispersed in the mixed solution at a temperature of 40-50°C. Under the action of ethyl orthosilicate and dibutyltin dilaurate, carbon black is formed. Black / silicone rubber mixture; the carbon black / silicone rubber mixture is evenly coated on the copper foil coil on the planar eddy current coil film, extruded into a fil...

Embodiment 2

[0020] Copper foil coils are laminated on the underlying polyimide film to form a planar eddy current coil film. The thickness of the polyimide film is 12.5 microns, the thickness of the copper foil coil is 10 microns, the number of turns is 30, and the line width is 0.3 mm, the line distance is 0.15 mm; carbon nanotube powder and room temperature vulcanized silicone rubber with an aspect ratio of 330 are mixed in a mass ratio of 0.03:1, and then added to n-hexane; for carbon nanotube / silicone rubber / n-hexane mixed solution for high-power mechanical stirring, supplemented by ultrasonic vibration, so that carbon nanotubes are dispersed in the mixed solution, the temperature is 40-50 ° C, under the action of ethyl orthosilicate and dibutyltin dilaurate, Form a carbon nanotube / silicone rubber mixture; coat the carbon nanotube / silicone rubber mixture evenly on the copper foil coil on the planar eddy current coil film, extrude it into a film with a rigid smooth flat plate, and wait...

Embodiment 3

[0022] Copper foil coils are laminated on the underlying polyimide film to form a planar eddy current coil film. The thickness of the polyimide film is 12.5 microns, the thickness of the copper foil coil is 10 microns, the number of turns is 60, and the line width is 0.3 mm, the line distance is 0.3 mm; the carbon black powder with an average particle size of 20 nanometers and the room temperature vulcanized silicone rubber are mixed in a mass ratio of 0.04:1, and then added to n-hexane; for carbon black / silicone rubber / The mixed solution of n-hexane is stirred by high-power machinery, and at the same time supplemented by ultrasonic vibration, the carbon black is dispersed in the mixed solution at a temperature of 40-50°C. Under the action of ethyl orthosilicate and dibutyltin dilaurate, carbon black is formed. Black / silicone rubber mixture; the carbon black / silicone rubber mixture is evenly coated on the copper foil coil on the planar eddy current coil film, extruded into a f...

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Abstract

The invention relates to an integral soft sensing element with pressure and non-contact gap measuring functions, and belongs to the technical field of sensors. The integral soft sensing element comprises an insulation encapsulation film, a pressure-sensitive film and a plane type eddy current coil film, wherein the insulation encapsulation film is made of polyimide, the pressure-sensitive film layer is made of conducting polymer composite materials, the plane type eddy current coil film consists of a polyimide film and a copper foil coil compounded on the polyimide film, the conducting polymer composite materials are directly vulcanized on the naked copper foil coil to form an integral structure, and the pressure and non-contact gap measurement is realized through obtaining the impedance of the integral structure. The integral sensing element developed by the invention has the advantages that the softness is good, the thickness is small, the process is simple, the cost is low, the pressure measurement and the non-contact gap measurement can be realized only through one set of sensing system, the integral soft sensing element is applicable to the interlayer pressure and gap measurement of narrow and small curved surfaces of industrial equipment, and the key technology can also be applied to the development of multifunction electronic skin.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a soft sensor preparation and packaging process. Background technique [0002] Many major equipment in the modern military and industrial fields have a narrow curved interlayer structure, and the contact surfaces on both sides of the gap can produce relative movement. In order to ensure the safe operation of the equipment and obtain system status information in time, it is necessary to measure the interlayer pressure and conduct non-contact gap measurement. However, the narrow gap and irregular contact surface bring difficulties to the installation of traditional rigid sensors. Therefore, there is an urgent need for a thin and flexible sensor that can be attached to the contact surface smoothly to complete the monitoring of interlayer pressure and non-contact gap measurement. task. [0003] Conductive polymer composite material is a new type of functional material. ...

Claims

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Application Information

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IPC IPC(8): G01L1/20G01B7/14
Inventor 王璐珩
Owner NORTHEASTERN UNIV
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