阅读说明：本技术 基于摩擦纳米发电机的仿生触须传感器 (Bionic tentacle sensor based on friction nano generator ) 是由 徐敏义 王思远 徐鹏 王新宇 马志 杨思凡 谢广明 于 2019-11-13 设计创作，主要内容包括：本发明提供一种基于摩擦纳米发电机的仿生触须传感器,包括：固定装置,设置在柔性外壳的顶部且与柔性外壳相连,用于将柔性外壳固定在搭载装置上；柔性外壳,具有中空腔体结构,用于容纳发电单元；发电单元,包括金属电极、介电薄膜、垫片和外部支撑材料,外部支撑材料位于最外侧,金属电极附着在介质薄膜的表面,位于外部支撑材料与介质薄膜之间,垫片与金属电极分布在介质薄膜的两侧；导线,其一端与金属电极相连,另一端与信号采集器相连。本发明结构简单、牢固,可有效减少海水拍打的压力及海水腐蚀对装置输出性能的影响；将传感器阵列构成多传感器智能感知系统,可提高感知能力；可感知外界涡街的变化,实现对水下运动物体的定位追踪。(The invention provides a bionic tentacle sensor based on a friction nano generator, which comprises: the fixing device is arranged at the top of the flexible shell, is connected with the flexible shell and is used for fixing the flexible shell on the carrying device; a flexible housing having a hollow cavity structure for housing the power generating unit; the power generation unit comprises a metal electrode, a dielectric film, a gasket and an external support material, wherein the external support material is positioned on the outermost side, the metal electrode is attached to the surface of the dielectric film and positioned between the external support material and the dielectric film, and the gasket and the metal electrode are distributed on two sides of the dielectric film; and one end of the wire is connected with the metal electrode, and the other end of the wire is connected with the signal collector. The invention has simple and firm structure, and can effectively reduce the influence of seawater beating pressure and seawater corrosion on the output performance of the device; the sensor array forms a multi-sensor intelligent sensing system, so that the sensing capability can be improved; can sense the change of the external vortex street and realize the positioning and tracking of the underwater moving object.)

1. A bionic tentacle sensor based on a friction nano-generator is characterized by comprising:

the fixing device (12) is arranged at the top of the flexible shell (1), is connected with the flexible shell (1), and is used for fixing the flexible shell (1) on the carrying device (13);

a flexible housing (1) having a hollow cavity structure for accommodating a power generating unit (2);

the power generation unit (2) comprises a metal electrode (5), a dielectric film (4), a gasket (6) and an external support material (3), wherein the external support material (3) is positioned on the outermost side, the metal electrode (5) is attached to the surface of the dielectric film and positioned between the external support material (3) and the dielectric film, and the gasket (6) and the metal electrode (5) are distributed on two sides of the dielectric film;

the metal electrodes (5) comprise a first metal electrode (5) and a second metal electrode (5), the dielectric film (4) comprises a first dielectric film (4) and a second dielectric film (4), the external supporting material (3) comprises a first external supporting material (3) and a second external supporting material (3), and the first external supporting material (3), the first dielectric film (4), the first metal electrode (5), the gasket (6), the second metal electrode (5), the second dielectric film (4) and the second external supporting material (3) are sequentially arranged from top to bottom;

and one end of the lead (10) is connected with the metal electrode (5), the other end of the lead extends out of the flexible shell (1) and is connected with the electrostatic high impedance meter (9), and data transmitted through the lead (10) is stored in the signal collector (11).

2. Bionic tentacle sensor based on triboelectric nanogenerators, according to claim 1, characterized in that both the flexible housing (1) and the fixation means (12) are antiseptic treated.

3. The bionic tentacle sensor based on the friction nanogenerator as claimed in claim 1 or 2, wherein the flexible shell (1) is made of silica gel by a 3D printing mold through injection molding.

4. Bionic tentacle sensor based on triboelectric nanogenerator according to claim 1, characterized in that the outside of the generating unit (2) is encapsulated by silicone sealing material to maintain internal sealing.

5. Bionic tentacle sensor based on triboelectric nanogenerator according to claim 1 or 4, characterized in that the surface material of the dielectric film (4) is an insulator or a semiconductor material.

6. Bionic tentacle sensor based on triboelectric nanogenerator according to claim 5, characterized in that the dielectric film (4) has micro-nano structure via nano-processing to enhance the output performance of the power generating unit (2).

7. Bionic tentacle sensor based on triboelectric nanogenerator according to claim 1 or 4, characterized in that the material of the metal electrode (5) is a thin film or single layer of conductive material.

8. Bionic tentacle sensor based on triboelectric nanogenerator according to claim 5, characterized in that the outer surface of the metal electrode (5) has micro-nano structure via nano-processing for enhancing the output performance of the power generation unit (2).

9. The bionic tentacle sensor based on the friction nanogenerator according to claim 1, wherein current is generated by friction electrification and electrostatic induction, when no external force acts, no friction occurs between the metal electrode (5) and the dielectric film (4) to generate induced charge, under the action of an external vortex street, the bionic shape of the tentacle sensor induces the vortex street to regularly swing, the metal electrode (5) and the dielectric film (4) inside the tentacle sensor rub against each other, micro-nano structures on the surfaces of the tentacle sensor are extruded with each other, and negative charge is generated due to the difference of electrode sequences and the friction of the dielectric film (4); when the whisker sensor is restored, the dielectric film (4) induces positive charges on the metal electrode (5) on the other side, and current is generated in an external circuit.

Technical Field

The invention relates to the technical field of bionic sensors, in particular to a bionic tentacle sensor based on a friction nano generator.

Background

With the proposal of the strong national policy of oceans, the development and utilization facing the oceans field become the central importance of the development of China. The underwater sensor is an important device for sensing underwater environment information, and has been a major object of research and development, but the sensing capability in a severe environment has not been a substantial breakthrough. Most of the current commonly used underwater sensors belong to traditional pressure, ion concentration, vision, sonar and the like, and have poor effect in the face of underwater severe environment. When an underwater object moves, two sides of the object periodically fall off to form double-row line vortexes which are opposite in rotation direction and are regularly arranged, namely a karman vortex street. The sensing of the vortex street can avoid the interference effect of the underwater environment on the traditional sensing function, and how to realize the sensing of the vortex street of a moving object becomes the primary task in the near term.

In summary, there is a need to provide a new sensor to solve the above problems.

Disclosure of Invention

The common underwater sensor provided by the method belongs to traditional pressure, ion concentration, vision, sonar and the like, and provides a bionic tentacle sensor based on a friction nano generator in order to solve the technical problems that the effect of an underwater severe environment is poor and sensitive sensing of a vortex street of an underwater moving object cannot be realized. The principle that two materials rub with each other to generate triboelectricity and electrostatic induction is mainly utilized, the electrode sequences of the materials of the metal electrode and the dielectric film are different, the metal electrode and the dielectric film rub with each other under the action of an external vortex street, and induced charges are generated in the metal electrode layer, so that vortex-induced vibration generated during self-movement is effectively resisted, sensitive response is generated to the change of the external vortex street, and the sensing of an underwater flow field is realized by sensing the change of the vortex.

The technical means adopted by the invention are as follows:

a biomimetic whisker sensor based on a triboelectric nanogenerator, comprising:

the fixing device is arranged at the top of the flexible shell, is connected with the flexible shell and is used for fixing the flexible shell on the carrying device;

a flexible housing having a hollow cavity structure for housing the power generating unit;

the power generation unit comprises a metal electrode, a dielectric film, a gasket and an external support material, wherein the external support material is positioned on the outermost side, the metal electrode is attached to the surface of the dielectric film and positioned between the external support material and the dielectric film, and the gasket and the metal electrode are distributed on two sides of the dielectric film;

the metal electrodes comprise a first metal electrode and a second metal electrode, the dielectric films comprise a first dielectric film and a second dielectric film, the external supporting materials comprise a first external supporting material and a second external supporting material, and the first external supporting material, the first dielectric film, the first metal electrode, the gasket, the second metal electrode, the second dielectric film and the second external supporting material are sequentially arranged from top to bottom;

and one end of the wire is connected with the metal electrode, the other end of the wire extends out of the flexible shell and is connected with the electrostatic high impedance meter, and data transmitted through the wire is stored to the signal collector.

Further, the flexible shell and the fixing device are both subjected to anti-corrosion treatment.

Further, flexible shell adopts 3D printing die to irritate the mould preparation, and its material is silica gel.

Further, the exterior of the power generation unit is encapsulated by a silicone sealant to maintain internal sealing.

Further, the surface material of the dielectric film is an insulator or a semiconductor material.

Further, the dielectric film has a micro-nano structure through nano processing so as to enhance the output performance of the power generation unit.

Further, the metal electrode is made of a conductive material film or a single-layer conductive material.

Furthermore, the outer surface of the metal electrode has a micro-nano structure through nano treatment, and the micro-nano structure is used for enhancing the output performance of the power generation unit.

Further, current is generated by friction electrification and electrostatic induction, when no external force acts, no friction occurs between the metal electrode and the dielectric film to generate induction charge, under the action of an external vortex street, the bionic shape of the whisker sensor induces the vortex street to regularly swing, the metal electrode and the dielectric film inside the whisker sensor rub with each other, the micro-nano structures on the surface extrude with each other, and negative charge is generated due to the difference of electrode sequences and the friction of the dielectric film; when the whisker sensor is restored, the dielectric film can induce positive charges on the metal electrode on the other side, and current can be generated in an external circuit.

Further, by utilizing the principle that the two materials rub against each other to generate triboelectricity and electrostatic induction, the electrode sequence of the material of the metal electrode and the material of the surface of the dielectric film are different, the two materials can be selected from insulating materials and semiconductor materials, the surface material of the dielectric film is the first friction material, and the first friction material can be the insulating material or the semiconductor material. Correspondingly, the metal electrode is a conductive material film, and can also be a single-layer conductive material. The metal electrode material is a second friction material, and the material of the second friction material can be a conductor material.

Compared with the prior art, the invention has the following advantages:

1. according to the bionic tentacle sensor based on the friction nano generator, the bionic tentacle structure can effectively resist vortex-induced vibration generated by self movement and can generate sensitive response to external vortex street change. Compared with the defect that the traditional sensor can only sense through hearing or vision, the bionic touch sensor provided by the project can sense the underwater flow field through sensing the change of the vortex, and has the advantages of small volume and low cost. The method has important application value in the aspects of underwater environment monitoring, underwater operation robot motion control and the like.

2. The bionic tentacle sensor based on the friction nano generator provided by the invention adopts the power generation unit of the flexible film, and the structural function of the power generation unit can be flexibly designed according to the environment and the invention requirement.

3. The bionic tentacle sensor based on the friction nano generator provided by the invention can realize effective perception of a complex environment by forming an array by a plurality of bionic tentacle sensors in the complex marine environment.

4. The bionic tentacle sensor based on the friction nano generator provided by the invention has a simple and firm structure, can effectively reduce the pressure of seawater beating, and can reduce the influence of seawater corrosion on the output performance of the device.

5. The bionic tentacle sensor based on the friction nano generator provided by the invention can not only sense the change of an underwater flow field efficiently, but also sense parameters such as wind speed, flow velocity and the like.

In conclusion, the technical scheme of the invention can solve the problems that most of the common underwater sensors in the prior art belong to traditional pressure, ion concentration, vision, sonar and the like, and the problems that the effect is poor in the underwater severe environment and sensitive sensing of the vortex street of an underwater moving object cannot be realized are solved.

Based on the reasons, the invention can be widely popularized in the technical field of friction nano power generation, the technical field of bionics and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a bionic tentacle sensor based on a friction nano-generator in embodiment 1 of the invention.

Fig. 2 is an exploded view of the power generation unit of fig. 1.

FIG. 3 is a schematic diagram of the operation of the bionic tentacle sensor based on the friction nano-generator.

Fig. 4 is a schematic three-dimensional structure diagram of a bionic tentacle sensor sensing system based on a friction nano-generator in embodiment 1 of the invention.

In the figure: 1. a flexible housing; 2. a power generation unit; 3. an outer support material; 4. a dielectric film; 5. a metal electrode; 6. a gasket; 7. a bionic tentacle sensor based on a friction nano generator; 8. robotic fish; 9. an electrostatic high impedance meter; 10. a wire; 11. a signal collector; 12. a fixing device; 13. a device is mounted.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1-2, the present invention provides a bionic seal tentacle sensor based on a friction nanogenerator exhibiting excellent output performance, which can sense fluid vortex street change and convert it into an electrical signal, comprising:

the fixing device 12 is arranged at the top of the flexible shell 1, is connected with the flexible shell 1, and is used for fixing the flexible shell 1 on the carrying device 13; the fixing device 12 is subjected to a corrosion prevention treatment.

A flexible housing 1 having a hollow cavity structure for accommodating the power generation unit 2; the flexible shell 1 is subjected to antiseptic treatment; flexible housing 1 adopts 3D printing die to irritate the mould preparation and forms, and its material is silica gel.

The power generation unit 2 comprises a metal electrode 5, a dielectric film 4, a gasket 6 and an external support material 3, wherein the external support material 3 is positioned on the outermost side, the metal electrode 5 is attached to the surface of the dielectric film and positioned between the external support material 3 and the dielectric film, and the gasket 6 and the metal electrode 5 are distributed on two sides of the dielectric film;

specifically, the exterior of the power generation unit 2 is encapsulated by a silicone sealant to maintain internal sealing; the surface material of the dielectric film 4 is an insulator or a semiconductor material, and the dielectric film 4 has a micro-nano structure through nano treatment so as to enhance the output performance of the power generation unit 2; the metal electrode 5 is made of a conductive material film or a single-layer conductive material, and the outer surface of the metal electrode 5 is processed by nano processing to form a micro-nano structure for enhancing the output performance of the power generation unit 2.

The metal electrode 5 comprises a first metal electrode 5 and a second metal electrode 5, the dielectric film 4 comprises a first dielectric film 4 and a second dielectric film 4, the external supporting material 3 comprises a first external supporting material 3 and a second external supporting material 3, and the first external supporting material 3, the first dielectric film 4, the first metal electrode 5, the gasket 6, the second metal electrode 5, the second dielectric film 4 and the second external supporting material 3 are sequentially arranged from top to bottom.

One end of a wire 10 is connected with the metal electrode 5, the other end of the wire extends out of the flexible shell 1 and is connected with an electrostatic high impedance meter 9, the electrostatic high impedance meter 9 is connected with a signal collector 11 through the wire 10, and data transmitted through the wire 10 is stored in the signal collector 11. The model of the static high-resistance meter 9 is Keithley 6514, and the signal collector adopts a computer.

The electric current is generated by utilizing friction electrification and electrostatic induction, when no external force acts, no friction occurs between the metal electrode 5 and the dielectric film 4 to generate induction charges, under the action of an external vortex street, the bionic shape of the whisker sensor induces the vortex street to regularly swing, the metal electrode 5 and the dielectric film 4 inside the whisker sensor rub with each other, the micro-nano structures on the surfaces of the whisker sensor extrude each other, and negative charges are generated due to the difference of electrode sequences and the friction of the dielectric film 4; when the whisker sensor is restored, the dielectric film 4 induces positive charges on the metal electrode 5 on the other side, and current is generated in an external circuit.

By utilizing the principle that the two materials rub against each other to generate triboelectricity and electrostatic induction, the electrode sequence of the material of the metal electrode 5 and the material of the surface of the dielectric film 4 are different, the two materials can be selected from insulating materials and semiconductor materials, the surface material of the dielectric film 4 is a first rubbing material, and the first rubbing material can be an insulating material or a semiconductor material. Accordingly, the metal electrode 5 is a thin film of conductive material, and may also be a single layer of conductive material, such as a copper film, which is not limited herein. The surface material of the metal electrode 5 is a second friction material, and the material of the second friction material can be a conductor material.