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Composite dielectric layer flexible capacitive tactile sensor based on open-closed cell structure and preparation method thereof

A technology of tactile sensors and composite media, applied in the field of sensors, can solve the problems of tactile sensors such as slow response time, poor durability, and inability to balance range and sensitivity, and achieve high market value and industrialization potential, good durability, and good market competition force effect

Active Publication Date: 2022-03-22
HEFEI UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0006] In order to avoid the shortcomings of the above-mentioned prior art, the present invention proposes a composite dielectric layer flexible capacitive touch sensor based on an open-closed structure and a preparation method thereof based on a physical foaming process of thermoplastic expandable microspheres. It aims to solve the problems of the existing tactile sensors such as slow response time, poor durability, and inability to balance the range and sensitivity, and ensure that the obtained tactile sensor has an adjustable range under high sensitivity and is suitable for different occasions, so as to improve the adaptability of the tactile sensor as a wearable device and scope of application

Method used

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  • Composite dielectric layer flexible capacitive tactile sensor based on open-closed cell structure and preparation method thereof

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Embodiment 1

[0039] Such as figure 1 As shown, the present embodiment is based on a composite dielectric layer flexible capacitive touch sensor with an open cell-closed cell structure as a sandwich structure, with a flexible conductive fabric as the upper and lower two pole plates, and a composite medium layer is arranged between the two pole plates, and A flexible insulating film is arranged between the composite medium layer and the two pole plates. Wherein, the composite medium layer uses silicone rubber as a flexible matrix, carbon black and multi-walled carbon nanotubes as conductive materials, and foamed microspheres are added in the composite medium layer as an open-closed-pore structure. The flexible insulating film is silicone rubber.

[0040] Foamed microspheres include closed-cell foamed microspheres and open-cell foamed microspheres, which are obtained by physical foaming with thermoplastic expandable microspheres as the foaming agent; closed-cell foamed microspheres and open-...

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Abstract

The invention discloses a composite medium layer flexible capacitive touch sensor based on an open-closed structure and a preparation method thereof. The sensor is a sandwich structure, and a flexible conductive fabric is used as an upper and a lower two pole plates, and a tactile sensor is arranged between the two pole plates. A composite dielectric layer with an open cell-closed cell structure, and a flexible insulating film is arranged between the composite dielectric layer and the two pole plates. The flexible capacitive touch sensor of the invention has the advantages of high sensitivity and controllable measuring range, simple preparation process, low cost, easy industrialization, and good market prospect and market value.

Description

technical field [0001] The invention belongs to the field of sensors, in particular to a composite dielectric layer flexible capacitive touch sensor based on an open-closed structure. 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. Among them, tactile perception plays an important role in the field of artificial skin research. One of the hot spots of bionic electronic skin is to study a flexible tactile sensor with high sensitivity and high stability. Wearable flexible tactile 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 artif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/14G01L9/12
CPCG01L1/14G01L9/12
Inventor 黄英吴青楠钟锐涛印钰宁浩汪洋
Owner HEFEI UNIV OF TECH
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