Capacitance type flexible pressure sensor using natural microstructure as template

Abstract

A capacitance type flexible pressure sensor employs a sandwich structure, wherein the surface layer is a driving electrode, the base layer is an induction electrode, and the middle layer employs an elastic material; the top and bottom surfaces of the elastic material are provided with stereo textures with a natural material surface; the elastic material refers to an polyurethane elastomer materialor a crosslinked rubber material; the natural material surface refers to plant blades, fabrics, or wood, marble, ground glass, skin textures or sand paper with certain roughness; the elastic materialthickness is 0.3mm or above. The pressure sensor uses lotus leaves, silk fabric and ground glass microstructure surfaces as the temperature, thus micro-structurizing a dielectric layer; the flexiblepressure sensor uses spraying silver nano wire layer as electrodes.

Description

technical field [0001] The present invention relates to the design of a sensor, especially a flexible pressure sensor or electronic skin. Background technique [0002] In the 21st century where science and technology are changing with each passing day, biomechanics and medical engineering are emerging interdisciplinary subjects, and new materials are a hot research field with fast development, great potential and wide application range. Electronic skin is the product of applying new material technology to biomechanics and medical engineering. Whether it is a widely used robotic hand, robotic arm, or increasingly popular wearable electronic devices, or a human skin substitute in clinical medicine, electronic skin composed of pressure sensors and other sensors is an important component. In order to meet the needs of these applications, the development of pressure sensors with high sensitivity, high flexibility, excellent elasticity, large-scale integration, and high spatial r...

AI Technical Summary

Problems solved by technology

In 2014, Zhang Ting, a researcher at the Suzhou Institute of Nanotechnology and Nanobionics, Chinese Academy of Sciences, used polydimethylsiloxane (PDMS) silicone rubber to replicate the microstructure of silk, and used carbon nanotubes to make electrodes to produce a resistive stress sensor. [16] , but the capacitive pressure sensor has not been reported

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