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A flexible wearable sensor array and its preparation method

A sensor array, flexible technology, applied in the direction of nanotechnology for sensing, measurement of the property force of piezoelectric resistance materials, nanotechnology, etc., can solve the problem of small number of detection and recording signals, low sensitivity of wearable sensors, Single function, etc., to achieve excellent tensile properties, simple and efficient preparation process, and low relaxation time

Active Publication Date: 2022-05-13
工科思维技术(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to solve the problems of low sensitivity, high cost, small number of detection and recording signals, and single function of current wearable sensors, and provide a high-sensitivity flexible wearable sensor array and its preparation method, which can detect tiny particles of 50mN~1N Pressure, sensitivity>150KPa -1 , relaxation time <10mS

Method used

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  • A flexible wearable sensor array and its preparation method
  • A flexible wearable sensor array and its preparation method
  • A flexible wearable sensor array and its preparation method

Examples

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Embodiment 1

[0048] A high-sensitivity flexible wearable sensor array and its preparation method. In this embodiment, force-sensitive films, orthogonal wires, tapes, and insulating films are laminated into a sensor array; through overlapping between 10 rows and 10 columns of electrodes, Area-sensing force-sensitive thin film resistance changes in response to force, and then a high-sensitivity flexible wearable sensor array is obtained.

[0049] The specific preparation of the technical solution of this embodiment is realized through the following processes:

[0050] (1) Preparation of force sensitive film

[0051] 1) Preparation of carbon black dispersion: use an ultrasonic disperser to ultrasonically disperse carbon black and dispersant for 30-60 minutes to obtain a uniform carbon black dispersion for later use;

[0052] 2) Polyurethane solution preparation: use an ultrasonic disperser to ultrasonically disperse the polyurethane and dispersant for 30-60 minutes to obtain a uniform polyur...

Embodiment 2

[0074] In this embodiment, the mass fraction of carbon black in the conductive film is 6wt.%; the thickness of the force-sensitive film is 0.2 mm; the insulating film is a polyimide film with a thickness of 30 μm; the row conductors and the column conductors are respectively 10, It can be seen that a 10×10 sensor array has been prepared, which can be integrated on the insole to sense the tactile information of the sole of the human body during exercise.

Embodiment 3

[0076] In this embodiment, the mass fraction of carbon black in the conductive film is 7wt.%; the thickness of the force-sensitive film is 0.1 mm; the insulating film is a polytetrafluoroethylene film with a thickness of 10 μm; the number of row conductors and column conductors is 64, respectively. A 64×64 sensor array is prepared, which can be integrated into the upper-use glove to realize tactile perception when the hand completes the grasping action.

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Abstract

A flexible wearable sensor array and its preparation method, which relates to the field of preparation of flexible wearable devices, the purpose of the present invention is to solve the problems of low sensitivity, high cost, small number of detection and recording signals, and single function of current wearable sensors . In the present invention, multiple orthogonal wires are equidistantly arranged on both sides of the force-sensitive film by knitting to form a "sandwich" structure; then a layer of double-sided transparent tape is pasted on the outside of the wires; finally, a layer of insulating tape is pasted respectively film. The sensor array is prepared by lamination. The invention has the advantages of simple preparation process, low cost, high sensitivity, can obtain and record a large number of tactile signals at the same time, is flexible and stretchable, and can be applied to monitor and record tactile signals in multiple parts of the human body. The invention is applied in the field of preparation of flexible wearable devices.

Description

technical field [0001] The invention relates to the field of sensor array preparation, in particular to a highly sensitive flexible wearable sensor array and a preparation method thereof. Background technique [0002] A pressure sensor is a sensor used to measure mechanical parameters such as pressure and stress on the surface of an object, and it is also one of the most widely used and widely used sensors. As the most important type of pressure sensor, a piezoresistive sensor refers to a sensor made using the piezoresistive effect of materials and integrated circuit technology. After being subjected to a force, its resistivity changes, and the measurement circuit can be obtained proportional to Electric signal output of force change. Piezoresistive sensors are widely used because of their low cost and good responsiveness. However, in practical applications, due to the complex appearance characteristics of the measured object and the large difference in surface pressure di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/18B82Y15/00C08J5/18C08L75/04C08K3/04
CPCG01L1/18B82Y15/00C08J5/18C08J2375/04C08K3/04C08K2201/001
Inventor 钟晶卢东
Owner 工科思维技术(深圳)有限公司
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