A fabric-based capacitive sensor and its manufacturing method

A technology of capacitive sensor and manufacturing method, which is applied in the direction of converting sensor output, using electric/magnetic devices to transmit sensing components, instruments, etc., which can solve the problems of complex manufacturing process, poor flexibility, and high cost, and achieve low cost and low cost. Cost, the effect of real-time monitoring

Active Publication Date: 2021-06-08
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a fabric-based capacitive sensor, which solves the problems of poor flexibility and high cost of existing capacitive sensors
[0005] Another object of the present invention is to provide the manufacturing method of the above-mentioned fabric-based capacitive sensor, which solves the problem of complex manufacturing process of the existing capacitive sensor

Method used

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  • A fabric-based capacitive sensor and its manufacturing method
  • A fabric-based capacitive sensor and its manufacturing method
  • A fabric-based capacitive sensor and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Step 1. Select the plain weave fabric, cut it into a size of 70mm×70mm, soak the plain weave fabric in alcohol with a volume fraction of 75% for 10 minutes, and ultrasonic power is 80W; take out the plain weave fabric after ultrasonic cleaning with deionized water, and then statically air dry;

[0055] Step 2. Immerse the dried plain weave fabric in the graphene dispersion, then ultrasonic the above plain weave fabric for 20min, the ultrasonic power is 40W, leave it to air dry, and iron the air dried plain weave fabric with an iron;

[0056] Wherein, the dispersion is composed of graphene, polyvinylpyrrolidone and deionized water mixed with a mass ratio of 0.01:0.2:100, wherein the solid content of graphene in the dispersion is 0.01wt%;

[0057] Step 3. Paste conductive copper foil on the upper and lower surfaces of the ironed plain fabric. The length of the conductive copper foil is 40mm, the width is 3mm, and the thickness is 30μm. The conductive copper foil is far aw...

Embodiment 2

[0063] The manufacturing method of this capacitive sensor based on fabric is the same as embodiment 1, the difference is:

[0064] The fabric dielectric layer 2 is a twill fabric;

[0065] In step 1, the time of ultrasonic treatment is 15min, and the power is 80W;

[0066] In step 2, the time of ultrasonic treatment is 25min, and the power is 50W;

[0067] The dispersion is composed of carbon nanotubes, polyvinylpyrrolidone and deionized water mixed with a mass ratio of 0.03:0.7:100, and the solid content of carbon nanotubes in the dispersion is 0.03wt%;

[0068] The length of the conductive copper foil is 45mm and the width is 4mm;

[0069] In step 5, the mass ratio of polydimethylsiloxane and Dow Corning 184 silicone rubber is 5:1;

[0070] In step 6, the curing time is 90 minutes, and the temperature is 70°C.

Embodiment 3

[0072] The manufacturing method of this capacitive sensor based on fabric is the same as embodiment 1, the difference is:

[0073] The fabric dielectric layer 2 is a satin weave fabric;

[0074] In step 1, the time of ultrasonic treatment is 20min, and the power is 70W;

[0075] In step 2, the time of ultrasonic treatment is 30min, and the power is 60W;

[0076] The dispersion liquid is composed of conductive carbon black, polyvinylpyrrolidone and deionized water in a mass ratio of 0.05:1.25:100, and the solid content of the conductive carbon black in the dispersion liquid is 0.05wt%;

[0077] The length of the conductive copper foil is 50mm and the width is 5mm;

[0078] In step 5, the mass ratio of polydimethylsiloxane and Dow Corning 184 silicone rubber is 8:1;

[0079] In step 6, the curing time is 105 minutes, and the temperature is 65°C.

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Abstract

The invention discloses a fabric-based capacitive sensor, which comprises an electrode layer a and an electrode layer b, a fabric dielectric layer is arranged between the electrode layer a and the electrode layer b, and the electrode layer a , the electrode layer b and the fabric dielectric layer are all cured and encapsulated by the encapsulation material, and both the electrode layer a and the electrode layer b are connected with wires. The invention also discloses a manufacturing method of the above-mentioned fabric-based capacitive sensor. Firstly, pre-treat the fabric dielectric layer, then immerse the fabric dielectric layer in the dispersion liquid and take it out after ultrasonication; print the mold through a 3D printer, and convert the conductive The copper foil is pasted on the surface of the fabric dielectric layer, then placed in the mold, and the mold is clamped; after the packaging material is prepared, it is poured into the mold, and after standing still, the above mold is placed in a curing furnace for curing treatment, and the final product Fabric-based capacitive sensors. The invention solves the problems of poor flexibility and high manufacturing cost of the existing capacitive sensors.

Description

technical field [0001] The invention belongs to the technical field of flexible wearable electronic devices, relates to a fabric-based capacitive sensor, and also relates to a manufacturing method of the capacitive sensor. Background technique [0002] Smart textiles are a kind of textiles that highly integrate electronic technology and fabrics. In addition to maintaining the basic functions of traditional textiles, they also have functions such as monitoring, information processing and communication. It has broad application prospects. Smart textiles are generally composed of sensors, actuators, data processing, communication, and power supplies. Sensors are the key for smart textiles to realize the interaction between the human body and the outside world, which requires the sensors to have good flexibility, high sensitivity and fast response. Traditional sensors are mostly composed of metals and semiconductors, and have poor coupling with fabrics. After direct integration...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/241
CPCG01D5/2417
Inventor 肖渊张威李红英
Owner XI'AN POLYTECHNIC UNIVERSITY
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