Flexible pressure sensor based on hollow sphere structure, and preparation method thereof

A pressure sensor and hollow ball technology, applied in the sensor field, can solve the problems of small pressure sensor range, slow response time, low sensitivity, etc., and achieve the effects of fast response time, low cost and good durability

Inactive Publication Date: 2019-09-10
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to avoid the shortcomings of the above-mentioned technologies, the present invention proposes a flexible pressure sensor based on a hollow sphere structure and its preparation method based on the method of physical foaming of thermally expandable microspheres, aiming at solving the problems of the existing pressure sensors with small range, Address issues such as low sensitivity, slow response time, and poor durability, and improve the ability of pressure sensors to function as wearable devices

Method used

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  • Flexible pressure sensor based on hollow sphere structure, and preparation method thereof
  • Flexible pressure sensor based on hollow sphere structure, and preparation method thereof
  • Flexible pressure sensor based on hollow sphere structure, and preparation method thereof

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Embodiment 1

[0035] Such as figure 1 As shown, the flexible pressure sensor based on the hollow sphere structure of the present invention is a sandwich structure, with the conductive fabric as the upper and lower electrodes, and a porous conductive composite film as a pressure sensitive unit is arranged between the two electrodes;

[0036] Among them, the porous conductive composite film is based on silicon rubber, heat-expandable microspheres are used as elastic elements, and carbon black and multi-walled carbon nanotubes are used as conductive materials. The mass ratio of heat-expandable microspheres, silicone rubber, multi-walled carbon nanotubes, and carbon black is 1:8:0.4:0.6, which is the optimal proportion determined through experiments: when the mass fraction of heat-expandable microspheres is 10%, , the cell density of the composite material after foaming is the best, and there are too many thermal expansion microspheres, which is not conducive to the solidification and molding o...

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Abstract

The invention discloses a flexible pressure sensor based on a hollow sphere structure, and a preparation method thereof. The sensor is of a sandwich structure and is characterized in that an electricconduction fabric is taken as an upper electrode and a lower electrode and a porous electric conduction compound film which is used as a pressure sensitive unit is arranged between the two electrodes;the porous electric conduction compound film is characterized in that silicon rubber is taken as a substrate, a thermal expansion microsphere is taken as an elastic element and carbon black and a multi-wall carbon nanotube are take as an electric conduction material. The pressure sensor disclosed by the invention has the characteristics of low cost, high elasticity, wide measuring range, quick response characteristics, durability and the like, and is simple in preparation technology, easy in industrialization and high in market value and industrialization potential.

Description

technical field [0001] The invention belongs to the field of sensors, in particular to a flexible pressure sensor based on a hollow sphere structure and a preparation method thereof. Background technique [0002] In recent years, the development of electronics has mainly focused on the application of flexible devices, including wireless health monitoring, electronic skin, flexible sensor networks, artificial muscles, flexible human-machine interfaces, and the integration of engineered tissue construction, etc. Wearable flexible pressure sensor, as an artificial flexible electronic device with a tactile function similar to human skin, can realize accurate perception of external tactile information, and has broad application prospects in the fields of artificial intelligence, bioelectronics, medical rehabilitation, and human-computer interaction. . [0003] How to effectively convert external stimuli into electrical signals is a key technology for flexible wearable tactile se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/18
CPCG01L1/18
Inventor 黄英汪洋刘月王志强刘平刘彩霞
Owner HEFEI UNIV OF TECH
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