Capacitive flexible tactile sensor with gradient zero Poisson's ratio structure and its preparation method

Abstract

The capacitive flexible touch sensor with gradient zero Poisson's ratio structure disclosed by the present invention includes an insulating surface protrusion in contact with external objects, and also includes an insulating film and a substrate film; wherein, the bottom of the insulating surface protrusion is provided with an insulating film , a dielectric layer with a gradient zero Poisson’s 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 respectively, and the lower surface of the insulating film is provided with an upper flexible electrode, lining The upper surface of the bottom film is provided with a lower flexible electrode. The invention improves the performance of the sensor by using the composite conductive airgel with gradient zero Poisson's ratio structure as the dielectric layer and the substrate film added with nanometer 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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