A piezoresistive flexible tactile sensor with double-layer buckle-type micro-protrusions

Abstract

The invention discloses a piezoresistive type flexible tactile sensor with double-layer fastener type micro-bosses. The sensor is formed by stacking a semi-spherical protrusion, an upper-layer micro-boss array, a stretchable electrode array, a flexible pressure-sensitive array and a lower-layer micro-boss array structure which are arranged sequentially from top to bottom, wherein the flexible pressure-sensitive array is composed of a linear graphene pattern array and a flexible thin-film substrate; and the stretchable electrode array is composed of row and column strip-shaped electrodes and circular insulating barriers between the row and column strip-shaped electrodes. The stretchable electrode array is tightly attached to the flexible pressure-sensitive array; and square pins are arranged on the two sides of each linear graphene pattern, and are connected with the row and column strip-shaped electrodes respectively to form a closed loop. The double-layer fastener type micro-bosses are adopted to convert an external force effect on the tactile sensor into tensile deformation of the linear graphene patterns in the flexible pressure-sensitive array, so that the resistance change ofthe pressure-sensitive array is more obvious, and the sensitivity of the tactile sensor is improved; and meanwhile, the flexible design of the tactile sensor is realized by adopting a conductive composite material.

Description

technical field [0001] The invention relates to a tactile sensor, in particular to a piezoresistive flexible tactile sensor with double-layer buckle-type micro-projections. Background technique [0002] With the continuous development of the field of robotics, people not only require robots to have movement functions, but also have the functions of perception and interaction with the outside world, so as to move towards the direction of intelligence. Equipping robots with tactile sensors is an important way to achieve the above functions, but traditional tactile sensors are limited by rigid materials, and it is difficult to fit the complex curved surfaces of robots. The tactile sensor based on conductive composite materials, because of its excellent flexibility, can better fit the surface of the robot and meet the application requirements. [0003] Based on different sensing principles, tactile sensors can be divided into capacitive, piezoresistive, piezoelectric, optical, ...

AI Technical Summary

Problems solved by technology

At present, most piezoresistive flexible sensors use metal electrodes, which have low flexibility.

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