Bottle-shaped acoustic-electric conversion power generation device

Abstract

The application discloses a bottle-shaped sound-electricity conversion power generation device, which comprises a shell, a PVDF film, a metal net and a piezoelectric component.

Description

Technical Field

[0001] This invention relates to a power generation device, specifically a bottle-shaped acoustic-to-electricity conversion power generation device. Background Technology

[0002] In recent years, with the improvement of environmental awareness and the popularization of knowledge, air pollution, water pollution and solid waste pollution can be properly solved, and even waste can be turned into treasure. However, the utilization of noise is not yet very mature.

[0003] Currently, the world's main approach to noise pollution control involves isolating or protecting the noise along its propagation path to convert it into other forms of energy, but this doesn't effectively utilize the energy generated by the noise itself. With continuous technological advancements, significant research has been conducted on generating electricity using sound wave vibrations, resulting in technologies such as traveling wave thermoacoustic generators, miniature Holmz piezoelectric acoustic generators, flowing nano-acoustic generators, acoustic crystal resonant cavity acoustic power generation systems, and electromagnetic noise power generation systems (composed of a resonant motor and a permanent magnet generator), among others.

[0004] In industrial power generation, permanent magnet oscillators are often used as excitation for motors to match the oscillations of noise waves, making sound-to-electric conversion easier and improving efficiency. However, noise power generation still faces challenges such as variations in noise power depending on the source, propagation path, and dominant frequency. Factors affecting power generation system performance include: the transducer's sound-to-electric conversion efficiency limits the improvement of power generation efficiency; the low integration level of the sound power generation device hinders system efficiency improvement; and existing manufacturing processes also affect efficiency to some extent. Therefore, improving manufacturing processes, optimizing individual system parameters and the overall system, expanding system bandwidth, achieving high power output, low-voltage drive, miniaturization, and integration are current development directions.

[0005] Piezoelectric power generation technology is an advanced technology that has attracted global attention and extensive research over the past decade. A piezoelectric device generates electrical charge under alternating external forces. This charge is collected and stored in capacitors or batteries to power subsequent electronic components and systems. The advantages of piezoelectric energy harvesting devices include their small size, simple structure, absence of electromagnetic interference, ease of fabrication, and power density that can reach 200 μW / cm². 3 Based on current research findings from various research institutions and experts, piezoelectric materials can be used in sensors and actuators, as well as as devices for providing electrical energy. With the improvement of the piezoelectric properties of piezoelectric materials and their high integration, the use of low-energy power electronic devices has made piezoelectric power generation technology a research hotspot. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes a bottle-shaped acoustic-electric conversion power generation device.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows:

[0008] A bottle-shaped acoustic-to-electricity conversion power generation device includes:

[0009] The shell is a hollow cylinder with openings at both ends, with the first opening end and the second opening end being the two opening ends respectively. A rectifier circuit and an energy storage circuit are arranged inside the shell cavity.

[0010] A PVDF film is disposed at the first opening end, and the middle part of the PVDF film is recessed towards the location of the second opening end. The PVDF film is led out through the electrode wire and electrically connected to the energy storage circuit.

[0011] A metal mesh is disposed at the second open end, and the middle part of the metal mesh is grooved towards the position of the first open end. One, two or more piezoelectric components are provided on the metal mesh.

[0012] The piezoelectric component includes a metal foil and piezoelectric ceramic sheets disposed on both sides of the metal foil. The metal foil in the piezoelectric component is electrically connected to a PVDF energy storage circuit through a rectifier circuit.

[0013] This invention discloses a bottle-shaped sound-to-electricity conversion power generation device that adopts a double-layer design with concave top and bottom surfaces. This structure can enhance the reflection of sound waves on the two curved surfaces, allowing for more efficient utilization of sound waves. This device converts mid-to-high frequency sounds in daily life into electrical energy, which can be described as inexhaustible. Moreover, this device organically combines sound pressure and vibration to form a power generation system with sound pressure as the primary factor and vibration as a secondary factor.

[0014] Based on the above technical solution, the following improvements can be made:

[0015] As a preferred embodiment, the diameter of the shell cavity gradually increases from the first opening end to the second opening end.

[0016] Using the preferred scheme described above, the trumpet-shaped cavity structure has good guiding properties.

[0017] As a preferred embodiment, the wall thickness at the first opening end of the housing is greater than the wall thickness at the second opening end of the housing.

[0018] Using the preferred solution described above simplifies mold making.

[0019] As a preferred embodiment, the wall thickness of the first opening end of the housing is the same as the wall thickness of the second opening end of the housing.

[0020] By adopting the above-mentioned preferred scheme, the overall mechanical strength of the shell is better.

[0021] As a preferred embodiment, the rectifier circuit includes: four rectifier diodes, one fast turn-off diode, and a filter capacitor.

[0022] The preferred solution described above has a simple structure and low cost.

[0023] As a preferred option, the energy storage circuit includes a graphene supercapacitor.

[0024] Using the above-mentioned preferred scheme, graphene, as an electrode material for supercapacitors, has a relatively stable internal structure and is the best material to fit the double-layer energy storage principle of supercapacitors.

[0025] As a preferred option, the metal foil and the ceramic piezoelectric sheet are bonded together.

[0026] The preferred solution described above provides excellent connection performance.

[0027] As a preferred option, the shell is cylindrical.

[0028] The preferred design described above results in an aesthetically pleasing appearance.

[0029] As a preferred embodiment, the portion of the housing near the first opening is a film-attached portion, and the outer diameter of the film-attached portion gradually decreases from the second opening to the first opening. A PVDF film is also attached to the outer surface of the film-attached portion, and the PVDF film is led out through the electrode by a wire and electrically connected to the energy storage circuit.

[0030] Using the preferred scheme described above, the conversion efficiency of the internal piezoelectric ceramic is affected because the location of the sound source is random. However, PVDF film is also a functional material with high piezoelectric properties and can be made very thin. By attaching this material to the bottle-shaped outer shell and the first opening, it can cope with the randomness of the external vibration direction, and its stress source will also be greatly increased.

[0031] As a preferred option, the mesh size of the metal mesh gradually increases from the center outwards.

[0032] The vibration effect is better when the above-mentioned preferred scheme is adopted. Attached Figure Description

[0033] Figure 1 This is one of the structural schematic diagrams of the bottle-shaped acoustic-electric conversion power generation device provided in an embodiment of the present invention.

[0034] Figure 2 This is the second schematic diagram of the bottle-shaped acoustic-electric conversion power generation device provided in an embodiment of the present invention.

[0035] Figure 3 This is the third schematic diagram of the bottle-shaped acoustic-electric conversion power generation device provided in the embodiment of the present invention.

[0036] Figure 4 This is a schematic diagram of the structure of the PVDF thin film and electrode provided in an embodiment of the present invention.

[0037] Figure 5 This is a schematic diagram of the bottle-shaped acoustic-to-electricity conversion power generation device provided in an embodiment of the present invention.

[0038] Figure 6 The circuit diagrams of the rectifier circuit and energy storage circuit provided in the embodiments of the present invention are shown.

[0039] Wherein: 1-shell; 11-first opening end; 12-second opening end; 13-film application part; 2-PVDF film; 3-metal mesh; 4-electrode. Detailed Implementation

[0040] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0041] To achieve the objectives of this invention, some embodiments of a bottle-shaped acoustic-to-electricity conversion power generation device, such as... Figure 1-3 As shown in Figure 5, a bottle-shaped acoustic-to-electricity conversion power generation device includes:

[0042] The housing 1 is a hollow cylinder with openings at both ends, and the two ends are the first opening end 11 and the second opening end 12, respectively. A rectifier circuit and an energy storage circuit are provided in the cavity of the housing 1.

[0043] A PVDF (polyvinylidene fluoride) film 2 is disposed at the first opening end 11, and the middle part of the PVDF film 2 is recessed towards the location of the second opening end 12. The PVDF film 2 is led out by the electrode 4 and electrically connected to the energy storage circuit.

[0044] Metal mesh 3 is disposed at the second opening end 12, and the middle part of metal mesh 3 is grooved towards the position of the first opening end 11. One, two or more piezoelectric components are provided on metal mesh 3.

[0045] The piezoelectric component (not shown in the figure) includes: a metal foil and piezoelectric ceramic sheets disposed on both sides of the metal foil. The metal foil in the piezoelectric component is electrically connected to the PVDF energy storage circuit through a rectifier circuit.

[0046] Metal mesh 3 can be copper mesh.

[0047] This invention discloses a bottle-shaped sound-to-electricity conversion power generation device that adopts a double-layer design with concave top and bottom surfaces. This structure can enhance the reflection of sound waves on the two curved surfaces, allowing for more efficient utilization of sound waves. This device converts mid-to-high frequency sounds in daily life into electrical energy, which can be described as inexhaustible. Moreover, this device organically combines sound pressure and vibration to form a power generation system with sound pressure as the primary factor and vibration as a secondary factor.

[0048] To further optimize the implementation effect of the present invention, in some other embodiments, the remaining features are the same, except that the diameter of the cavity of the housing 1 gradually increases from the first opening end 11 to the second opening end 12.

[0049] Using the preferred scheme described above, the trumpet-shaped cavity structure has good guiding properties.

[0050] Furthermore, the wall thickness of the first opening end 11 of the housing 1 is greater than the wall thickness of the second opening end 12 of the housing 1.

[0051] Using the preferred solution described above simplifies mold making. Of course, in other embodiments, the wall thickness of the first opening end 11 of the housing 1 is the same as the wall thickness of the second opening end 12 of the housing 1, resulting in better overall mechanical strength of the housing 1.

[0052] The internal structure of this invention employs a double-layer design with concave top and bottom surfaces. This structure enhances the reflection of sound waves on these two curved surfaces, allowing for more efficient use of sound waves. The first layer of this double-layer structure uses PVDF piezoelectric thin film material, and the second layer uses a piezoelectric component; both layers can simultaneously receive sound wave vibrations. The two layers are connected by a horn-shaped structure, which has good guiding properties, and the horn-shaped structure, together with the external structure, forms an internal cavity that can accommodate circuitry and transducers.

[0053] The two ends of the piezoelectric ceramic electrode are connected by silver wires to achieve power conversion through a rectifier circuit. The converted circuit is then led out in parallel with the PVDF thin film 2 via electrodes and wires, connecting to the energy storage circuit.

[0054] When multiple piezoelectric components are used, the internal design of this invention involves multiple piezoelectric components resonating to generate electricity. Two high-voltage polarized piezoelectric ceramic sheets are bonded to both sides of a metal foil. The two piezoelectric ceramic sheets exhibit the same electrical properties on their surfaces, so alternating current can be conducted through the metal foil and connected in parallel, thus having the same high and low resonant frequencies. When one piezoelectric ceramic sheet deforms and vibrates, its metal mesh 3 also vibrates, generating resonance and causing other ceramic sheets to vibrate as well, thereby generating electricity.

[0055] The working principle of this device is as follows: When sound reaches the PVDF (smaller concave surface), it is compressed and deformed, thereby generating electricity. The concave structure maximizes the pressure-bearing area and also provides better sound wave reception. The upper and lower concave double-layer structure can gather the lossy sound that previously passed through the PVDF and disperse it to the piezoelectric component. The sound waves cause the piezoelectric ceramic to vibrate and deform, thus generating electricity. The entire device fully utilizes the positive piezoelectric effect of the piezoelectric material.

[0056] To further optimize the implementation effect of the present invention, in some other embodiments, the remaining technical features are the same, except that the rectifier circuit includes: four rectifier diodes, one fast turn-off diode, and a filter capacitor.

[0057] The preferred solution described above has a simple structure and low cost. For example... Figure 6 As shown, specifically, a simple full-wave rectifier circuit is designed using four low-power rectifier diodes (D1, D2, D3, D4) 1N5399, plus a fast turn-off diode (D5) 1N4188 and a small-capacity (C1) 10μF filter capacitor.

[0058] To further optimize the implementation effect of the present invention, in some other embodiments, the remaining technical features are the same, except that the energy storage circuit includes: a graphene supercapacitor (C2).

[0059] Using the above-mentioned preferred scheme, graphene supercapacitors are selected to store electrical energy, and this simple circuit is used to simulate the collection and storage of current. Graphene, as an electrode material for supercapacitors, has a relatively stable internal structure and is the best material to fit the double-layer energy storage principle of supercapacitors. However, due to the strong interlayer van der Waals forces in practical applications, graphene agglomeration can occur. Therefore, referring to a novel method for preparing nitrogen-doped graphene electrode materials, natural flake graphite is used as the raw material, and melamine is used as the functionalizing agent and nitrogen dopant. Instantaneous high heat generated by microwaves is used to dope nitrogen atoms from melamine into the graphite sheet lattice structure, thereby synthesizing nitrogen-doped graphene supercapacitor electrode materials.

[0060] To further optimize the implementation effect of the present invention, in some other embodiments, the remaining technical features are the same, except that the metal foil and the ceramic piezoelectric sheet are bonded together.

[0061] The preferred solution described above provides excellent connection performance.

[0062] To further optimize the implementation effect of the present invention, in some other embodiments, the remaining features are the same, except that the shell 1 is cylindrical.

[0063] The preferred design described above results in an aesthetically pleasing appearance.

[0064] To further optimize the implementation effect of the present invention, in some other embodiments, the remaining features are the same, except that the portion of the housing 1 near the first opening end 11 is a film-attached portion 13, and the outer diameter of the film-attached portion 13 gradually decreases from the second opening end 12 toward the location of the first opening end 11; a PVDF film 2 is also attached to the outer surface of the film-attached portion 13, and the PVDF film 2 is led out through the electrode wire and electrically connected to the energy storage circuit.

[0065] Using the preferred scheme described above, the conversion efficiency of the internal piezoelectric ceramic is affected because the location of the sound source is random. However, the PVDF film 2 is also a functional material with high piezoelectric properties and can be made very thin. By attaching this material to the bottle-shaped outer shell and the first opening end 11, it can cope with the randomness of the external vibration direction, and its stress source will also be greatly increased. Figure 4 This is a simplified schematic diagram of the PVDF film 2 and the electrodes in the device. The selected piezoelectric film is extremely durable and can withstand millions of bends and vibrations during power generation.

[0066] To further optimize the implementation effect of the present invention, in some other embodiments, the remaining features are the same, except that the mesh size of the metal mesh 3 gradually increases from the middle to the periphery.

[0067] The vibration effect is better when the above-mentioned preferred scheme is adopted.

[0068] The beneficial effects of this invention are as follows:

[0069] (1) The appearance is novel, with a bottle-shaped outer shell. The film-coating part 13 is covered with a PVDF film 2, which reduces the limitation of the internal structure on the PVDF power generation area. The power generation transposition uses a concave structure to facilitate the collection of sound waves. The two layers are connected by a horn shape. The horn shape has good guidance, and the horn-shaped structure and the external structure will form an inner cavity to protect the internal circuit.

[0070] (2) In terms of materials, piezoelectric thin film and piezoelectric ceramic material are used. When sound waves collide with piezoelectric material, resonance is generated and it is compressed. Through the positive piezoelectric effect of piezoelectric material, power is generated.

[0071] (3) Power generation method: This device converts mid-to-high frequency sounds in daily life into electrical energy, which can be said to be inexhaustible. Moreover, this device organically combines sound pressure and vibration to form a power generation system with sound pressure as the main factor and vibration as the auxiliary factor.

[0072] (4) Wide geographical applicability: This invention breaks the geographical limitations and is no longer limited to enclosed spaces such as ship cabins. This project can also be applied to large public places (including cinemas, train stations, etc.), roadsides, airports, etc.

[0073] Regarding the preferred embodiments of the present invention, it should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. A bottle-shaped acoustic-to-electricity conversion power generation device, characterized in that, include: A housing, which is a hollow cylinder with openings at both ends, namely a first opening and a second opening, is provided inside the housing cavity. A rectifier circuit and an energy storage circuit are provided inside the housing cavity. A PVDF film is provided at the first opening, and the middle part of the PVDF film is recessed towards the second opening. The PVDF film is led out by electrodes and electrically connected to the energy storage circuit. A metal mesh is provided at the second opening, and the middle part of the metal mesh is recessed towards the first opening. One, two, or more piezoelectric components are provided on the metal mesh. A piezoelectric component includes: a metal foil and piezoelectric ceramic sheets disposed on both sides of the metal foil. The metal foil in the piezoelectric component is electrically connected to a PVDF energy storage circuit through a rectifier circuit. The housing is cylindrical. The portion of the housing near the first opening is a film-attached portion, and the outer diameter of the film-attached portion gradually decreases from the second opening to the first opening. A PVDF film is also attached to the outer surface of the film-attached portion, and the PVDF film is led out through electrodes and electrically connected to the energy storage circuit. The mesh size of the metal mesh gradually increases from the center to the periphery.

2. The bottle-shaped acoustic-to-electricity conversion power generation device according to claim 1, characterized in that, The diameter of the cavity in the housing gradually increases from the first opening end to the second opening end.

3. The bottle-shaped acoustic-to-electricity conversion power generation device according to claim 2, characterized in that, The wall thickness at the first opening end of the housing is greater than the wall thickness at the second opening end of the housing.

4. The bottle-shaped acoustic-to-electricity conversion power generation device according to claim 2, characterized in that, The wall thickness at the first opening end of the housing is the same as the wall thickness at the second opening end of the housing.

5. The bottle-shaped acoustic-to-electricity conversion power generation device according to claim 1, characterized in that, The rectifier circuit includes: four rectifier diodes, one fast turn-off diode, and a filter capacitor.

6. The bottle-shaped acoustic-to-electricity conversion power generation device according to claim 1, characterized in that, The energy storage circuit includes a graphene supercapacitor.

7. The bottle-shaped acoustic-to-electricity conversion power generation device according to claim 1, characterized in that, The metal foil and the ceramic piezoelectric sheet are bonded together.

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