Flexible tactile sensor and preparation method thereof

Abstract

The invention relates to a flexible tactile sensor. The sensor comprises a piezoelectric electret cable sensing unit and a piezoelectric film sensing unit which are conductively connected with each other, the piezoelectric electret cable sensing unit comprises a core electrode, a piezoelectric electret layer, a shielding layer and a sheath protection layer which are coaxially connected in sequencefrom inside to outside; wherein the piezoelectric film sensing unit comprises a first electrode layer, a piezoelectric material layer and a second electrode layer which are longitudinally distributedand sequentially connected, the shielding layer is connected with a piezoelectric cable grounding lead, the first electrode layer is connected with a first electrode lead of a piezoelectric film, andthe second electrode layer is connected with a second electrode lead of the piezoelectric film. Compared with the prior art, normal stress and shear stress can be measured at the same time.

Description

technical field [0001] The invention relates to the field of sensing technology, in particular to a flexible tactile sensor and a preparation method thereof. Background technique [0002] With the rapid development of flexible sensor technology and wireless communication technology, it has given birth to the development of intelligent, good flexibility, ductility, wearable sensors and perception systems, especially in artificial intelligence robots, industrial equipment, medical equipment, In the fields of telemedicine and health monitoring, the application prospects of flexible tactile sensors are very broad. Therefore, the performance requirements for flexible sensors are getting higher and higher. At present, most of the existing piezoelectric sensors only use rigid sensing materials as transducing materials, and their relative rigidity restricts the overall flexibility of the sensors. On the other hand, although most flexible sensors using flexible piezoelectric materi...

AI Technical Summary

Problems solved by technology

At present, most of the existing piezoelectric sensors only use rigid sensing materials as energy-transforming materials, and their relative rigidity restricts the overall flexibility of the sensor.

On the other hand, although most flexible sensors using flexible piezoelectric materials as transducer materials can measure normal stress and shear stress, it is difficult to separate normal stress and shear stress, and cannot accurately measure the three-dimensional stress of the contact interface. measurement and analysis, limiting its further fields of application

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