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

A tactile sensor and micro-boss technology, applied in the field of tactile sensors, can solve problems such as low flexibility, achieve the effect of improving sensitivity, high sensitivity, and realizing flexible design

Active Publication Date: 2020-07-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with drawings and embodiments.

[0042] Such as figure 1As shown, the present invention is mainly composed of hemispherical protrusions 1, upper micro-protrusion array 2, stretchable electrode array 3, flexible pressure-sensitive array 4 and lower micro-protrusion array 5 sequentially stacked from top to bottom; The platform array 5 is used as the bottom support to form a double-layer buckle structure together with the upper micro-projection array 2 . The flexible pressure-sensitive array 4 is mainly composed of a linear graphene pattern array 9 and a flexible film substrate 10 . The hemispherical protrusion array 1 is mainly composed of a silicone rubber membrane and an array of hemispherical protrusions on the surface of the membrane. The height of a single hemispherical protrusion is 500 μm, the diameter of the bottom is 2000 μm, and the total height of the silicone rubber membrane and the hemisphe...

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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, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/18
CPCG01L1/18
Inventor 汪延成朱凌锋朱皖东梅德庆李洪浩
Owner ZHEJIANG UNIV
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