Power-assisted structure nanometer generator for pressing communication

Abstract

The utility model discloses a power-assisted structure nanometer generator for pressing communication, which comprises a power-assisted structure, a base and a plane spring, the plane spring is mounted on the base, and an aluminum electrode and a fluorinated ethylene propylene copolymer film are sequentially arranged at the bottom of the plane spring from top to bottom; a multi-carbon nanotube layer is arranged on the inner surface of a bottom plate of the base, and the fluorinated ethylene propylene copolymer film and the multi-carbon nanotube layer are oppositely arranged; the aluminum electrode and the multi-carbon nanotube layer are connected through a rectifier diode; the power assisting structure excites the plane spring in a weak excitation mode. According to the utility model, the large-area contact separation of the contact electrification layer under the weak excitation condition is realized, and the output performance of the nano generator is effectively improved by using smaller input.

Description

Technical Field

[0001] This invention designs a push-to-communicate structure nanogenerator, belonging to the field of nanogenerator technology. Background Technology

[0002] Human mechanical energy is a widely existing form of high-entropy energy. As human society enters the era of the Internet of Things and the requirements for low-carbon and environmentally friendly sustainable development continue to increase, it is hoped that by capturing human mechanical energy and converting it into mechanical energy, it can be used to power low-power devices and transmit information.

[0003] In recent years, the novel triboelectric nanogenerator (TENG) proposed by Academician Wang Zhonglin has shown great promise in the field of self-driven sensing. Compared with piezoelectric and electromagnetic induction, triboelectric devices have a wide range of material selectivity, which greatly facilitates the fabrication and realization of the devices. For example, TENG devices utilize flexible PDMS elastic polymers to fabricate sensing films and deformable vibrating films, achieving effective sensing of low-frequency signals through contact electrification and electrostatic induction. Furthermore, through structural design and material modification, they can achieve self-driven monitoring of human physiological signals.

[0004] In addition, the large output voltage amplitude of TENG greatly reduces the difficulty of signal conditioning and transmission in hardware circuit design. Therefore, the output signal strength of this sensor is much higher than that of traditional measurement technology, enabling accurate acquisition of human pulse signals.

[0005] Since the frequency of human mechanical energy is relatively low, triboelectric nanogenerators have significant advantages over piezoelectric and electromagnetic methods in low-frequency energy capture, and also have advantages such as wide availability of materials and low cost.

[0006] To improve the performance of nanogenerators for low-frequency weak excitation, common methods include increasing the surface charge density of the contact charging layer, fabricating micro- and nano-structures on the surface of the contact charging layer, increasing its specific surface area, increasing the amplitude of the input force, and changing the stiffness of the contact layer to achieve more complete contact and separation.

[0007] However, in the capture of human energy (such as pulsating signals), the signal strength is weak, resulting in poor excitation effect of nanogenerators. How to effectively improve the output performance of nanogenerators using smaller inputs has become a problem to be solved. Utility Model Content

[0008] Purpose of the utility model: In order to effectively improve the output performance of nanogenerators with smaller inputs, this utility model provides a push-to-communicate assisted nanogenerator that achieves large-area contact separation of the contact electrification layer under weak excitation conditions.

[0009] Technical solution: To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] A push-to-talk nanogenerator includes a push-to-talk structure, a base, and a planar spring. The planar spring is mounted on the base, and an aluminum electrode and a fluorinated ethylene propylene copolymer film are sequentially arranged from top to bottom on the bottom of the planar spring. A multi-carbon nanotube layer is disposed on the inner surface of the base plate, and the fluorinated ethylene propylene copolymer film is positioned opposite to the multi-carbon nanotube layer. The aluminum electrode and the multi-carbon nanotube layer are connected by a rectifier diode. The push-to-talk structure excites the planar spring through a weak excitation method.

[0011] Preferably, the assist structure includes a T-shaped structure and a support column. The T-shaped structure includes a horizontal side and a pressing rod. The horizontal side and the pressing rod are fixed together. The horizontal side is mounted on the base. The lower end of the support column is in contact with a planar spring, and the upper end of the support column is fixedly connected to the pressing rod. The fixed connection point between the upper end of the support column and the pressing rod is called the support point. An excitation point is provided on the pressing rod. The excitation point and the horizontal side are located on both sides of the support point, and the distance from the connection point of the horizontal side and the base to the support point is less than the distance from the support point to the excitation point.

[0012] Preferably, the transverse edge is mounted on the base via a rotating bearing.

[0013] Preferably, the fluorinated ethylene propylene copolymer film is coated under the aluminum electrode.

[0014] Preferably, the multi-carbon nanotube layer is coated on the inner surface of the base plate.

[0015] Preferably, the rectifier diode is connected in sequence to a 100X attenuation probe and a voltage signal acquisition unit.

[0016] Preferably, the lower end of the support column is located at the top center of the planar spring.

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] 1. By adopting an assist structure, the planar spring is excited by a weak excitation method, which realizes large-area contact separation of the contact electrification layer under weak excitation conditions, thereby effectively improving the output performance of the nanogenerator with a smaller input.

[0019] 2. By fixing the horizontal edge of the T-shaped structure and connecting the middle of the T-shaped structure to a rigid hollow cylinder, a lever-like assist structure is formed. This assist structure can more effectively transmit and amplify force. In this assist structure, when there is a downward force at the excitation point, the rigid hollow cylinder will also experience a downward force. Furthermore, due to the different torque lengths, according to the lever principle, the magnitude of the force at two points on the same side of the lever is inversely proportional to the length of their lever arms. That is, when the lever arm is longer, the required force is smaller; and when the lever arm is shorter, the required force is larger. Therefore, excitation at the excitation point requires less effort than excitation at the plane spring.

[0020] 3. Finite element method (FEM) simulation of the deformation of the planar spring structure was performed. It can be verified that when the planar spring is pressed, the maximum displacement will be located on the central circular surface (30mm in diameter) of the planar spring. According to the theory of triboelectric nanogenerator, the magnitude of the generated voltage is proportional to the contact area of ​​the friction layer. Therefore, the button-like structure formed by the planar spring, the rigid hollow cylinder and the T-shaped structure not only realizes the transfer of displacement, but also effectively enhances the contact charging area of ​​the triboelectric nanogenerator. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the nanogenerator of this utility model;

[0022] Figure 2 This is a top view of the planar spring of this utility model;

[0023] Figure 3 This is a schematic diagram of the T-shaped structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the communication system of this utility model;

[0025] Figure 5 This is a structural diagram of the nanogenerator of this utility model;

[0026] Figure 6 This is a schematic diagram of the electrodes in this practical example;

[0027] Figure 7 This is a schematic diagram of the application structure in this practical example;

[0028] Figure 8 This is a graph showing the test results for this practical example. Detailed Implementation

[0029] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0030] A push-to-communicate nanogenerator, such as Figure 1-6 As shown, it includes a support structure, a base 100, and a flat spring 200. The base 100 is a square base with a hollow center, and the flat spring 200 is mounted on the base 100. Figure 2 , 5 As shown in Figure 6, the planar spring 200 is mounted at the top of the hollowed-out space of the base 100. From top to bottom, an aluminum electrode 120 and a fluorinated ethylene propylene copolymer film 130 are sequentially arranged on the bottom of the planar spring 200. In another embodiment, the aluminum electrode 120 is fixed to the lower surface of the planar spring 200, and the fluorinated ethylene propylene copolymer film (FEP) 130 is coated on the lower surface of the aluminum electrode 120. A multi-carbon nanotube layer 110 is disposed on the inner surface of the base plate of the base 100. In another embodiment, the multi-carbon nanotube layer 110 is coated on the inner surface of the base plate of the base 100. The fluorinated ethylene propylene copolymer film 130 is disposed opposite to the multi-carbon nanotube layer 110. The aluminum electrode 120 and the multi-carbon nanotube layer 110 are connected by a rectifier diode 500. The assist structure excites the planar spring 200 through a weak excitation method.

[0031] In another embodiment, the assistive structure includes a T-shaped structure 400 and a support column 300. The support column 300 is a rigid hollow cylinder. The T-shaped structure 400 includes a horizontal side 410 and a pressing rod 420, which are fixed together. In another embodiment, the horizontal side 410 and the pressing rod 420 are integrally formed. The horizontal side 410 is mounted on the base 100. In another embodiment, the horizontal side 410 is mounted on the base 100 via a rotating bearing. The lower end of the support column 300 is in contact with a planar spring 200. In another embodiment, as... Figure 1 and 2 As shown, the lower end of the support column 300 is located at the top center of the planar spring 200. The upper end of the support column 300 is fixedly connected to the pressing rod 420. The fixed connection point between the upper end of the support column 300 and the pressing rod 420 is called the support point. The pressing rod 420 is provided with an excitation point 430. The excitation point 430 and the horizontal edge 410 are located on both sides of the support point, and the distance from the connection point of the horizontal edge 410 and the base 100 to the support point is less than the distance from the support point to the excitation point.

[0032] In the structural design, a flat spring 200 is attached to a centrally hollowed-out square base 100 (55mm side length, 3.5mm height, and 1mm hollow depth). A support column 300 is fixed at the center of the flat spring 200. The horizontal side of the T-shaped structure 400 is fixed to the edge of the flat spring 200, and the vertical side is fixed to the support column 300. This creates a button-like assist structure. This assist structure allows for the conversion of point displacement on the vertical side of the T-shaped structure 400 into surface displacement within the central circular area of ​​the flat spring 200.

[0033] A fluorinated ethylene propylene copolymer (FEP) film, fixed to the back of a planar spring 200, is used as the negatively charged material for the triboelectric nanogenerator. An aluminum electrode is disposed on one side of its surface as the lead-out electrode. Multi-walled carbon nanotubes are used as the positively charged layer material, coated on a hollow square base. Advanced 3D printing technology was employed to manufacture the main components of the nanogenerator. Polylactic acid (PLA) was selected as the manufacturing material due to its excellent mechanical properties and environmentally friendly characteristics, meeting the requirements of green manufacturing.

[0034] Finite element analysis was performed on the deformation of the planar spring 200 structure. It can be verified that when the planar spring 200 is pressed, the maximum displacement will be located on the central circular surface (30mm in diameter) of the planar spring 200. According to the theory of triboelectric nanogenerator, the magnitude of the generated voltage is proportional to the contact area of ​​the friction layer. Therefore, the button-like structure formed by the planar spring 200, the support column 300 and the T-shaped structure 400 not only realizes the transmission of displacement, but also effectively enhances the contact charging area of ​​the triboelectric nanogenerator.

[0035] By fixing the horizontal edge of the T-shaped structure 400 and connecting the middle of the T-shaped structure 400 to the rigid hollow cylinder 300, a lever-like assist structure is formed, which can more effectively transmit and enhance force. In this assist structure, when the excitation point 430 has a downward force, the rigid hollow cylinder 300 will also be subjected to a downward force. Since the torque lengths are different, according to the lever principle, the magnitude of the force at two points on the same side of the lever is inversely proportional to the length of their lever arms. That is, when the lever arm is longer, the force required is smaller; and when the lever arm is shorter, the force required is larger. Therefore, excitation at the excitation point 430 requires less effort than excitation at the plane spring 200.

[0036] By pressing and releasing the T-shaped structure 400, the T-shaped structure 400 drives the rigid hollow cylinder 300 and the plane spring 200 to move. When the central circular surface of the plane spring 200 moves up and down, it causes the electronegative film fixed to the back of the plane spring 200 to come into contact with and separate from the central hollow square base 100 coated with conductive positive material. A conductive current is formed between the electrodes of the positive and negative materials. According to the principles of contact electrification and electrostatic induction, this reciprocating interaction generates alternating current between the electrodes, thereby realizing the conversion of mechanical energy into electrical energy.

[0037] To test the self-driven communication device, a setup was built as follows: Figure 7 The device shown is an application of this utility model. This self-driven communication device consists of a assisted nanogenerator, a rectifier diode, a 100X attenuation probe, and a voltage signal acquisition unit, which is a PXI-4461 module. At the signal transmitting end, pressing and releasing actions activate the nanogenerator, thereby enabling the effective input of binary information. After the waveform is rectified by the diode and the 100X attenuation probe, the voltage signal is acquired by the PXI-4461 module. The acquired voltage signal is demodulated and decoded to ultimately recover the original information, achieving the communication purpose. The ASCII code value corresponding to NJUPT is input through the triboelectric nanogenerator. The positive voltage across the nanogenerator and the recovered original information are shown below. Figure 8 As shown, by employing encoding at the transmitting end and binary mechanical amplitude modulation, self-driven generation of information from digital signals to analog signals is achieved. After the electrical signal is transmitted to the receiving end, half-wave rectification is used to regulate the self-driven electrical signal, completing binary amplitude demodulation and decoding to effectively recover the original information. This system is expected to find wider applications in the fields of human-computer interaction and near-field communication in the future.

[0038] By utilizing the function of the assisted structure nanogenerator to convert the mechanical energy of human body pressure into electrical energy, the encoded digital signal can be modulated into analog signal information through mechanical energy during the communication process. That is, the encoded information is transmitted as an analog electrical signal after the mechanical energy of the human body passes through the assisted structure nanogenerator, thus completing the transmission of information.

[0039] By acquiring the electrical signals of the assisted structure nanogenerator at the receiving end, the signals can be demodulated and decoded to recover the information. In this study, a diode was added after the nanogenerator. By utilizing its unidirectional conductivity, only the positive voltage is retained to eliminate the inconvenience caused to subsequent signal processing by the fact that the signal generated by the nanogenerator contains both positive and negative voltage signals. This improves the signal quality and lays the foundation for subsequent information transmission and demodulation.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A push-to-talk nanogenerator, characterized in that: The device includes an assist structure, a base (100), and a planar spring (200). The planar spring (200) is mounted on the base (100). From top to bottom, an aluminum electrode (120) and a fluorinated ethylene propylene copolymer film (130) are arranged on the bottom of the planar spring (200). A multi-carbon nanotube layer (110) is arranged on the inner surface of the base plate of the base (100), and the fluorinated ethylene propylene copolymer film (130) is arranged opposite to the multi-carbon nanotube layer (110). The aluminum electrode (120) and the multi-carbon nanotube layer (110) are connected by a rectifier diode (500). The assist structure excites the planar spring (200) through a weak excitation method.

2. The push-to-communicate nanogenerator according to claim 1, characterized in that: The assist structure includes a T-shaped structure (400) and a support column (300). The T-shaped structure (400) includes a horizontal side (410) and a pressing rod (420). The horizontal side (410) and the pressing rod (420) are fixed together. The horizontal side (410) is mounted on the base (100). The lower end of the support column (300) is in contact with a plane spring (200), and the upper end of the support column (300) is fixedly connected to the pressing rod (420). The fixed connection point between the upper end of the support column (300) and the pressing rod (420) is called the support point. An excitation point (430) is provided on the pressing rod (420). The excitation point (430) and the horizontal side (410) are located on both sides of the support point, and the distance from the connection point of the horizontal side (410) and the base (100) to the support point is less than the distance from the support point to the excitation point.

3. The push-to-communicate nanogenerator according to claim 2, characterized in that: The transverse edge (410) is mounted on the base (100) via a rotating bearing.

4. The push-to-communicate nanogenerator according to claim 3, characterized in that: The fluorinated ethylene propylene copolymer film (130) is coated under the aluminum electrode (120).

5. The push-to-communicate nanogenerator according to claim 4, characterized in that: The multi-carbon nanotube layer (110) is coated on the inner surface of the base plate of the base (100).

6. The push-to-communicate nanogenerator according to claim 5, characterized in that: The rectifier diode (500) is connected in sequence to a 100X attenuation probe and a voltage signal acquisition unit.

7. The push-to-communicate nanogenerator according to claim 6, characterized in that: The lower end of the support column (300) is located at the top center of the planar spring (200).

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