Three-dimensional depth-of-field touch sensor and preparation method and application thereof

Abstract

The invention discloses a three-dimensional depth-of-field touch sensor and a preparation method and application thereof. The three-dimensional depth-of-field touch sensor comprises a dielectric layer and a conductive layer; the dielectric layer is a polymer doped with nanoparticles; the conductive layer is disposed on at least one surface of the dielectric layer. The preparation method comprises the following steps: (1) preparing a nanoparticle-polymer composite film dielectric layer: ultrasonically dispersing nanoparticles in a polymer solution, and curing to form a film; and (2) preparing a conductive layer: sputtering metal on the surface pattern of the composite film obtained in the step (1) to prepare the conductive layer. Based on the electrostatic interaction and charge transfer principle, a corresponding logical relationship is established between the approaching-leaving motion behavior of an external object and a sensing electric signal, and the sensor is simple in preparation method and sensitive and rapid in response to the motion stimulation of an external non-contact object.

Description

technical field [0001] The invention relates to the technical field of flexible biosensors, in particular to a three-dimensional depth-of-field tactile sensor and a preparation method and application thereof. Background technique [0002] Biological sensorimotor systems can acquire external information in the form of electrochemical signals and transmit them to the internal nervous system, and generate motor feedback to construct interactions with the outside world (Nat. Rev. Neurosci. 2011.12(3):139-153). Based on the functional similarity between bionic devices and biological organs, building the same computing and processing system can bridge the gap between artificial and biological systems (Nat. Commun. 2021.12(1):4658). Among them, bionic perception is of great significance for human rehabilitation and new artificial somatosensory systems with high-order and multimodal functions, such as prosthetics in human-machine cooperation (HMC) (Adv.Mater.2015.27(46):7620 -7637)...

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Problems solved by technology

[0004] In the prior art, the problems in the perception of tactile electronic devices mainly include the following aspects: (1) This kind of perception still stays on the 2D skin surface and must be generated by contact or pressure, so contact damage and additional power consumption cannot be avoided , and the incomplete transmission of external environmental information; (2) In terms of perception of 3D space, traditional methods such as laser, infrared, and ultrasonic are usually used, resulting in high cost, complicated device layout or difficulty in integration, etc., which limit their application in HMC Further applications; (3) Some new methods based on magnetic force or humidity sensing are still limited to the special conditions of electromagnetic induction or the limited sensing range within 1cm

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