Gradient zero-Poisson-ratio structure capacitive flexible tactile sensor and preparation method thereof

Abstract

The invention discloses a gradient zero-Poisson-ratio structure capacitive flexible tactile sensor, which comprises an insulating surface bulge in contact with an external object, an insulating film and a substrate film, the insulating film is arranged at the bottom of the insulating surface bulge; a dielectric layer with a gradient zero-Poisson-ratio structure is arranged between the insulating film and the substrate film, the dielectric layer is in direct contact with the insulating film and the substrate film, an upper-layer flexible electrode is arranged on the lower surface of the insulating film, and a lower-layer flexible electrode is arranged on the upper surface of the substrate film. The performance of the sensor is improved by taking the composite material conductive aerogel with the gradient zero-Poisson-ratio structure as the dielectric layer and adding the substrate film of nano-crystalline cellulose.

Description

technical field [0001] The invention relates to the field of flexible tactile sensors, in particular to a capacitive flexible tactile sensor with gradient zero Poisson's ratio structure and a preparation method thereof. Background technique [0002] Flexible tactile sensor means that the physical characteristics of the tactile sensor are similar to those of human skin, and can be covered on any carrier surface to measure force information, thereby sensing the properties and characteristics of the target object. "Robot flexible and sensitive skin" has become a research hotspot in the field of intelligent robot tactile sensor technology. For example, medical robots equipped with highly sensitive flexible tactile sensors can detect the temperature and humidity of human organs, providing surgeons with real-time and accurate tactile information. [0003] However, in the face of increasing performance requirements, traditional flexible tactile sensors such as CN108827503A, CN1101...

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Problems solved by technology

[0003] However, in the face of increasing performance requirements, traditional flexible tactile sensors such as CN108827503A, CN110108393A, etc., have too simple structures, and the current mainstream flexible tactile sensors cannot simultaneously achieve the multiple characteristics of high flexibility, high sensitivity and high detection limit; In traditional 3D printing preparation methods, it is only applied to dielectric layer mold manufacturing or dielectric layer manufacturing, which only improves the molding accuracy or production efficiency of the dielectric layer, and does not realize the integrated manufacturing of multi-material sensors.

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