Photonic bionic skin

Abstract

Photonic bionic skin, which relates to the field of intelligent sensing. The photonic bionic skin comprises gel-like bionic skin layers (1) and an optical fiber micro-nano bionic nerve (2), wherein the optical fiber micro-nano bionic nerve (2) is coated with the gel-like bionic skin layers (1); the optical fiber micro-nano bionic nerve (2) is an optical fiber micro-nano device having an evanescent field area; and when the gel-like bionic skin layers (1) sense external stimuli, mechanical behavior changes, mechanical form changes or refractive index changes occur, which causes changes in optical parameters of transmitted light in the optical fiber micro-nano bionic nerve (2), thereby determining the skin sensing amount of the external stimuli. External stimuli can be sensed to a high degree of sensitivity, and the problems of an insufficient anti-electromagnetic interference capability and poor waterproofness can also be solved.

Description

A photonic bionic skin Technical Field

[0001] The present invention relates to the field of intelligent sensing, and in particular to a photonic bionic skin. Background Art

[0002] Bionic skin is an advanced biomimetic sensor that uses flexible intelligent sensors to mimic human skin's ability to sense external stimuli (pressure, temperature, and humidity), primarily electronic skin. Electronic skin integrates and feedbacks electrical signals to achieve skin-like functions such as temperature, humidity, and stress. Traditional electronic skin, typically tactile sensors based on metal and semiconductor materials, lacks flexibility and wearability, making it difficult to meet the stretchability and portability requirements of practical use.

[0003] With the rapid development of flexible materials, manufacturing processes, and sensing technologies, new three-dimensional polymer materials, such as hydrogels, are being widely used in the design of bionic skin. The current mainstream approach is to enhance the sensing function of bionic skin by converting external stimuli into electrical signals through the volume phase transition behavior of stimulus-responsive polymer films. However, electronic bionic skin generally suffers from insufficient electromagnetic interference resistance and poor water resistance, which limits its application scenarios.

[0004] Summary of the Invention

[0005] Based on this, an embodiment of the present invention provides a photonic bionic skin that can perceive external stimuli with high sensitivity while solving the problems of insufficient anti-electromagnetic interference ability and poor waterproofness.

[0006] To achieve the above objectives, the present invention provides the following solutions:

[0007] A photonic bionic skin, comprising: a gel-like bionic skin layer and optical fiber micro-nano bionic nerves;

[0008] The outside of the optical fiber micro-nano bionic nerve is wrapped with the gel-like bionic cortex; the optical fiber micro-nano bionic nerve is an optical fiber micro-nano device with an evanescent field region;

[0009] When the gel-based bionic skin senses external stimuli, changes in mechanical behavior, mechanical morphology or refractive index occur, thereby causing changes in the optical parameters of the transmitted light in the optical fiber micro-nano bionic nerve to determine the skin perception of the external stimulus.

[0010] Optionally, the optical fiber micro-nano bionic nerve comprises: a micro-nano cladding and a fiber core;

[0011] The outside of the fiber core is wrapped with the micro-nano cladding; the outside of the micro-nano cladding is wrapped with the gel-like bionic skin.

[0012] Optionally, the micro-nano cladding is a silicon dioxide film in the evanescent field region formed by tapering, etching or polishing the single-mode optical fiber.

[0013] Optionally, the fiber core is a fiber core of an evanescent field region formed by tapering, etching or polishing a single-mode optical fiber.

[0014] Optionally, the gel-like bionic skin layer is a transparent gel-like polymer.

[0015] Optionally, the transparent gel-like polymer includes a hydrogel-like polymer.

[0016] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0017] An embodiment of the present invention designs a photonic bionic skin based on fiber optic sensing technology. Compared with electronic bionic skin, the embodiment of the present invention organically combines fiber optic micro-nano devices and gel-type polymer materials to achieve high-sensitivity sensing of external stimuli, effectively solving the problems of insufficient anti-electromagnetic interference ability and poor waterproofness of bionic skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] FIG1 is a schematic structural diagram of a photonic bionic skin provided by an embodiment of the present invention;

[0020] FIG2 is a schematic diagram of the structure of the optical fiber micro-nano bionic nerve provided by an embodiment of the present invention.

[0021] Explanation of symbols:

[0022] Gel-based bionic cortex—1, optical fiber micro-nano bionic nerve—2, micro-nano cladding—3, fiber core—4. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The present invention proposes a photonic bionic skin based on fiber optic sensing technology. Through the organic combination of fiber optic micro-nano devices and gel-type polymer materials, it realizes high-sensitivity sensing of external stimuli such as temperature, humidity, and stress, and detects skin perception values ​​(temperature perception value, humidity perception value, stress perception value) with high sensitivity, effectively solving key technical problems such as insufficient anti-electromagnetic interference ability and poor waterproofness of bionic skin.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Referring to Figure 1 , the photonic bionic skin of this embodiment comprises a gel-like bionic skin layer 1 and a fiber-optic micro-nano bionic nerve 2. The fiber-optic micro-nano bionic nerve 2 wraps around the gel-like bionic skin layer 1; the fiber-optic micro-nano bionic nerve 2 is a fiber-optic micro-nano device with an evanescent field region.

[0027] When the gel-like bionic skin 1 senses external stimuli, it produces changes in mechanical behavior, mechanical morphology or refractive index, thereby causing changes in the optical parameters (such as light intensity or wavelength) of the transmitted light in the optical fiber micro-nano bionic nerve 2 to determine the skin perception of the external stimulus.

[0028] In one example, referring to FIG2 , the optical fiber micro-nano bionic nerve 2 includes: a micro-nano cladding 3 and a fiber core 4. The fiber core 4 is wrapped with the micro-nano cladding 3; and the micro-nano cladding 3 is wrapped with the gel-like bionic skin 1.

[0029] In one example, the micro-nano cladding 3 is a silica film in the evanescent field region formed by tapering, etching, or polishing a single-mode optical fiber, and is tightly attached to the fiber core 4. The fiber core 4 is the core of the evanescent field region formed by tapering, etching, or polishing a single-mode optical fiber.

[0030] Preferably, a tapered single-mode optical fiber is used as the optical fiber micro-nano bionic nerve 2. The evanescent field exists in the lumbar region of the tapered single-mode optical fiber, which facilitates the gel-based bionic cortex 1 to modulate the evanescent wave, thereby causing changes in the intensity or wavelength of the optical fiber-transmitted light, thereby achieving the purpose of sensing changes in external stimuli such as temperature, humidity, and pressure.

[0031] In one example, the gel-like bionic skin layer 1 is a transparent gel-like polymer, which is attached to the surface of the optical fiber micro-nano bionic nerve 2, and plays a role in sensitizing to external stimuli such as external temperature, humidity, and pressure, so as to detect the skin perception amount with high sensitivity.

[0032] Preferably, the transparent gel-like polymer may be a hydrogel-like polymer. When the temperature, humidity, or pressure surrounding the hydrogel polymer changes, the hydrogel undergoes changes in mechanical behavior, mechanical morphology, or refractive index, thereby modulating the evanescent field on the surface of the optical fiber micro-nano bionic nerve 2 and increasing the sensitivity of the surface of the optical fiber micro-nano bionic nerve 2 to changes in external stimuli.

[0033] In addition, the gel-like bionic skin 1 and the micro-nano cladding 3 form a composite cladding. When the temperature, humidity, pressure and other physical quantities around the bionic photonic skin change, the refractive index of the composite cladding will change, thereby causing the intensity or wavelength of the light transmitted in the optical fiber to change. By detecting the changes in light intensity or wavelength, the temperature, humidity, pressure and other physical quantities around the bionic photonic skin can be perceived.

[0034] The photonic bionic skin in all the above embodiments achieves high-sensitivity sensing of external stimuli such as temperature, humidity, and stress through the organic combination of optical fiber micro-nano devices and gel-type polymer materials, effectively solving the problems of insufficient anti-electromagnetic interference ability and poor waterproofness of bionic skin.

[0035] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0036] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A photonic bionic skin, characterized in that: include: Gel-based bionic cortex and fiber-optic micro-nano bionic nerves; The outside of the optical fiber micro-nano bionic nerve is wrapped with the gel-type bionic cortex; the optical fiber micro-nano bionic nerve is an optical fiber micro-nano device with an evanescent field region; When the gel-based bionic skin senses external stimuli, changes in mechanical behavior, mechanical morphology or refractive index occur, thereby causing changes in the optical parameters of the transmission light in the optical fiber micro-nano bionic nerve to determine the skin's perception of the external stimulus.

2. The photonic bionic skin according to claim 1, characterized in that: The optical fiber micro-nano bionic nerve comprises: a micro-nano cladding and a fiber core; The outside of the fiber core is wrapped with the micro-nano cladding; the outside of the micro-nano cladding is wrapped with the gel-like bionic skin layer.

3. The photonic bionic skin according to claim 2, characterized in that: The micro-nano cladding is a silicon dioxide film in the evanescent field region formed after the single-mode optical fiber is tapered, corroded or polished.

4. The photonic bionic skin according to claim 2, characterized in that: The fiber core is a fiber core in the evanescent field region formed by tapering, corroding or polishing the single-mode optical fiber.

5. The photonic bionic skin according to claim 1, characterized in that: The gel-like bionic skin layer is a transparent gel-like polymer.

6. The photonic bionic skin according to claim 5, characterized in that: The transparent gel-like polymer includes a hydrogel-like polymer.

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