Dielectric layer, ion capacitive flexible tactile sensor and preparation method and application thereof

Abstract

The invention provides a dielectric layer, an ion capacitive flexible tactile sensor and a preparation method and application thereof. The surface of the dielectric layer is provided with at least twoprojection structures of different micrometer sizes, the surface of the dielectric layer is further provided with a groove structure, and the groove structure is used for bearing the projection structures pressed under the action of pressure; the dielectric layer is provided with a hierarchical self-filling microstructure, so that the dielectric layer shows a relatively wide squeezability and deformability within a super-wide pressure range; the dielectric layer is applied to the capacitive flexible tactile sensor, so that the sensor has higher sensitivity, a wider response range, a lower detection limit, the shorter response time, better stability and extremely high pressure resolution; and the dielectric layer has great application prospects in the fields of robotics, human health monitoring, high-pressure sensing and the like.

Description

technical field [0001] The invention belongs to the field of sensors, and relates to a dielectric layer, an ion capacitive flexible tactile sensor and its preparation method and application, in particular to a dielectric layer based on a hierarchical self-filling microstructure, an ion capacitive flexible tactile sensor and its Preparation methods and applications. Background technique [0002] As the largest organ in the human body, the skin acts as a physical barrier through which we interact with our surroundings, allowing us to perceive various shapes, textures, and varying degrees of contact pressure. Creating flexible tactile sensors similar to human sensory capabilities can enable robots to better realize human-computer interaction (such as taking care of the elderly), enable prosthetics to help disabled people better perceive the outside world, and achieve more timely and accurate human health monitoring and monitoring in medical diagnosis. Diagnosis, so flexible ta...

AI Technical Summary

Problems solved by technology

In addition to the introduction of microstructures, the use of ionic elastomers as dielectric layers allows the interface between the dielectric layer and the electrode to form an electric double layer capacitance to increase the interface capacitance density, which can further improve the sensitivity of the sensor, but cannot achieve a wide pressure range. High sensitivity and pressure resolution

This is mainly because the deformation of these structures is easy to saturate during the compression process, especially under high pressure, the microstructure basically does not deform (structure hardening), even if the electric double layer capacitor is introduced, the capacitance signal cannot be further increased, resulting in very low sensitivity under high pressure Low, narrow pressure response range

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