Piezoelectric flexible sliding sensor and preparation method thereof

Abstract

The invention belongs to the field of flexible sliding sensors, and in particular relates to a piezoelectric flexible sliding sensor and a preparation method thereof. The flexible sliding sensor consists of a flexible base layer, a piezoelectric force sensitive layer and a surface packaging layer from bottom to top in sequence; The piezoelectric force-sensitive layer is composed of piezoelectric capacitive sensing units and electrode leads, and n piezoelectric capacitive sensing units are arranged in concentric circles to form a piezoelectric capacitive sensing array, and the piezoelectric capacitive sensing units are composed of Composed of core-shell structure nanofibers and semi-wrapped conductive coating, each core-shell structure nanofiber is a conductive core and a piezoelectric shell from the inside to the outside, and the piezoelectric shell is embedded in the middle of the conductive core and the semi-wrapped conductive coating. A piezoelectric capacitive sensing unit is formed. Under the action of an external force, the piezoelectric shell is polarized, and charges are generated on the conductive core and the semi-wrapped conductive coating. The invention has the advantages of being flexible and suitable for loading on a curved surface, fast in response, high in the distribution density of sensing units, and capable of 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 sampling 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 amputee patients. There is a significant need for prosthetic hands in these amputees. The prosthetic hand has undergone continuous improvement since its appearance, from the cosmetic prosthetic hand mainly based on decoration, to the mechanical prosthetic hand that realizes motion control through the pulling action 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 traditional mechanical pr...

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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