Piezoelectric flexible slip sensor and preparation method thereof

Abstract

The invention belongs to the field of flexible slip sensors, and particularly relates to a piezoelectric type flexible slip sensor and a preparation method thereof, and the flexible slip sensor is composed of a flexible substrate layer, a piezoelectric type force sensitive layer and a surface packaging layer in sequence from bottom to top; the piezoelectric force sensitive layer is composed of piezoelectric capacitance sensing units and electrode leads, the n piezoelectric capacitance sensing units are arranged in a concentric circle to form a piezoelectric capacitance sensing array, and each piezoelectric capacitance sensing unit is composed of core-shell structure nanofibers and a semi-wrapped conductive coating; and each core-shell structure nanofiber sequentially comprises a conductive core and a piezoelectric shell from inside to outside, the piezoelectric shell is embedded between the conductive core and the semi-wrapped conductive coating to form a piezoelectric capacitance sensing unit, and under the action of external force, the piezoelectric shell generates polarization to generate charges on the conductive core and the semi-wrapped conductive coating. The sensor has the advantages of being flexible, suitable for curved surface loading, high in response speed, large in sensing unit distribution density and capable of achieving slip prediction.

Description

technical field [0001] The invention belongs to the field of flexible sliding sensors, in particular to a piezoelectric flexible sliding sensor and a preparation method thereof. Background technique [0002] According to the second sample survey of disabled persons in China in 2006, the number of physically disabled patients in my country was as high as 24.12 million, accounting for about 1.83% of the total population, of which about 2.26 million were amputated. Among these amputee patients there is a significant need for prosthetic hands. The prosthetic hand has experienced continuous improvement since its appearance, from the cosmetic prosthetic hand mainly for decoration at the beginning, to the mechanical prosthetic hand that realizes motion control through the pulling effect of muscles in other parts of the human body, and finally to the intelligent prosthetic hand. direction development. The biggest difference between the intelligent prosthetic hand and the tradition...

AI Technical Summary

Problems solved by technology

However, to measure the distribution position and area of ​​sliding points, a high-density flexible dynamic force sensor array suitable for surface loading is required, and the existing sliding sensor cannot meet this requirement.

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