An umbrella-shaped composite piezoelectric power generation device

Abstract

An umbrella-shaped composite piezoelectric power generation device of the present invention includes a support frame in the shape of a multi-pyramid. Each side surface of the support frame is embedded with a triangular steel sheet, and a PVDF piezoelectric film is adhered to the triangular steel sheet, and a wire is led out from the PVDF piezoelectric film; a upper support rod is vertically arranged downward at the center of the support frame, and a lower support rod is connected to the lower part of the upper support rod through a double-headed stud. The diameter of the double-headed stud is smaller than the diameters of the upper support rod and the lower support rod. A square plate is slidably sleeved on the double-headed stud, and a plurality of piezoelectric cantilever beams are evenly distributed on the periphery of the square plate. The piezoelectric cantilever beam includes a square steel sheet, and a square piezoelectric ceramic sheet is arranged on the square steel sheet. A mass block is fixed at one end of the square piezoelectric ceramic sheet away from the square plate, and an electrode sheet is also covered on the square piezoelectric ceramic sheet and a wire is led out; a base is arranged under the lower support rod, and a spherical mounting head is rotatably arranged in the base. A round hole is opened at the upper end of the base, and the lower support rod passes through the round hole and is threadedly connected to the spherical mounting head. The present invention can supply energy for microelectronic devices placed outdoors.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy, and particularly relates to an umbrella-shaped composite piezoelectric power generation device. Background Art

[0002] With the intensification of global warming and the shortage of petroleum energy, seeking renewable energy with multiple methods, multiple sources and no pollution is the strategic focus of the world's scientific and technological development now and in the future. Capturing energy from the surrounding environment by different methods has become the focus of recent research and discussion. Among various types of energy conversion, the efficiency of converting mechanical energy generated by pressure, impact, vibration, etc. into electrical energy based on the piezoelectric effect is second only to solar energy and wind energy, and it is a very promising renewable energy.

[0003] Wind energy is a form of conversion of solar energy, and it is a renewable and natural energy that does not produce any pollutant emissions and can be obtained everywhere. Traditional wind power generation uses wind load to cause the rotor to rotate, and further uses the relative motion between the rotor and the stator to cut the magnetic field lines to generate an induced electromotive force to realize power supply to the load. However, this power supply method is large in scale and complex in process, and is not suitable for power supply to microelectronic devices.

[0004] In recent years, with the rapid development of large-scale distributed wireless sensing systems and microelectronic devices, although the traditional chemical battery power supply method can meet the requirements to a certain extent, its disadvantages are becoming more and more obvious, such as large volume, limited lifespan, and the need for regular replacement. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an umbrella-shaped composite piezoelectric power generation device that utilizes wind energy for power supply to microelectronic devices placed outdoors in view of the deficiencies of the background art.

[0006] The present invention adopts the following technical solutions to solve the above technical problems:

[0007] An umbrella-shaped composite piezoelectric power generation device includes a support frame in the shape of a multi-pyramid. Each side surface of the support frame is embedded with a triangular steel sheet, and a PVDF piezoelectric film is adhered to the triangular steel sheet, and a wire is led out from the PVDF piezoelectric film;

[0008] A upper support rod is vertically arranged downward at the center of the support frame. The lower part of the upper support rod is connected to a lower support rod through a double-headed stud. The diameter of the double-headed stud is smaller than the diameters of the upper support rod and the lower support rod. A square plate is slidably sleeved on the double-headed stud. A plurality of piezoelectric cantilever beams are evenly distributed on the periphery of the square plate. The piezoelectric cantilever beam includes a square steel sheet, and a square piezoelectric ceramic sheet is arranged on the square steel sheet. A mass block is fixed at one end of the square piezoelectric ceramic sheet away from the square plate. An electrode sheet is also covered on the square piezoelectric ceramic sheet and a wire is led out;

[0009] A base is provided under the lower support rod. A spherical mounting head is rotatably arranged inside the base. A round hole is provided at the upper end of the base. The lower support rod passes through the round hole and is threadedly connected to the spherical mounting head.

[0010] Furthermore, the upper end portion of the upper support rod is conical and is cooperatively connected to the top of the support frame.

[0011] Furthermore, the support frame is in the shape of a hexagonal pyramid.

[0012] Furthermore, four piezoelectric cantilever beams are provided.

[0013] Furthermore, the square steel sheet, the square piezoelectric ceramic sheet and the mass block are fixedly bonded together with glue.

[0014] Furthermore, the base is formed by splicing a base upper cover and a base lower cover. A spherical cavity is provided inside it. The round hole is provided in the middle of the base upper cover.

[0015] Compared with the prior art, the present invention adopts the above technical solutions and has the following technical effects:

[0016] The piezoelectric energy harvester based on the principle of wind-induced vibration of the present invention utilizes the mechanism of wind-induced vibration to convert wind energy into the vibration energy of the structure, and then utilizes the piezoelectric effect to convert the vibration energy of the structure into electrical energy. It has the advantages of small volume, simple structure and low cost, and can be used as a micro power source to replace the traditional battery power supply, and is particularly suitable for microelectronic devices placed outdoors.

[0017] The present invention is installed outdoors. When subjected to wind force, the support frame will deform under the force, and the triangular PVDF piezoelectric film fixedly connected to it will also deform accordingly. According to the piezoelectric effect, the wire connected to the PVDF piezoelectric film will output electrical energy. At the same time, under the action of wind force, according to the piezoelectric effect, the wire led out from the electrode plate will output electrical energy. In this device, the PVDF piezoelectric film and the square piezoelectric ceramic sheet can output electrical energy simultaneously, thereby improving the capture efficiency of electrical energy. Description of the Drawings

[0018] Figure 1 is the overall structural schematic diagram of this embodiment;

[0019] Figure 2 is the structural schematic diagram of the spherical mounting head in this embodiment.

[0020] In the figure, 1, PVDF piezoelectric film; 11, support frame; 2, upper support rod; 3, stud; 4, lower support rod; 5, square plate; 6, spherical mounting head; 7, base upper cover; 8, base lower cover; 9, square piezoelectric ceramic sheet; 10, square steel sheet; 11, mass block. Detailed Embodiments

[0021] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings:

[0022] An umbrella-shaped composite piezoelectric power generation device, as Figure 1 and 2 shown, includes a support frame 11 in the shape of a multi-pyramid. In this embodiment, the support frame 11 is in the shape of a hexagonal pyramid and is composed of steel wires. Each side surface of the support frame 11 is embedded with a triangular steel sheet, and a PVDF piezoelectric film 1 is adhered to the triangular steel sheet. The PVDF piezoelectric film 1 is led out with a wire.

[0023] A upper support rod 2 is vertically arranged downward at the center of the support frame 11. The upper end of the upper support rod 2 is conical and is cooperatively connected with the top of the support frame 11. The lower part of the upper support rod 2 is connected with a lower support rod 4 through a stud 3. The diameter of the stud 3 is smaller than the diameters of the upper support rod 2 and the lower support rod 4. A square plate 5 is slidably sleeved on the stud 3, and a plurality of piezoelectric cantilever beams are evenly distributed on the periphery of the square plate 5. In this embodiment, four piezoelectric cantilever beams are provided. The piezoelectric cantilever beam includes a square steel sheet 10, a square piezoelectric ceramic sheet 9 is arranged on the square steel sheet 10, a mass block 11 is fixed at one end of the square piezoelectric ceramic sheet 9 away from the square plate 5, and the square steel sheet 10, the square piezoelectric ceramic sheet 9 and the mass block 11 are fixedly adhered together with glue. An electrode sheet is also covered on the square piezoelectric ceramic sheet 9 and is led out with a wire.

[0024] A base is arranged under the lower support rod 4. A spherical mounting head 6 is rotatably arranged in the base. A circular hole is opened at the upper end of the base. The lower support rod 4 passes through the circular hole and is threadedly connected with the spherical mounting head 6. The base is composed of a base upper cover 7 and a base lower cover 8 spliced together, and a spherical cavity is arranged inside it. The circular hole is arranged in the middle of the base upper cover 7.

[0025] Specific implementation description:

[0026] The present invention is installed outdoors. When affected by wind force, the support frame will deform under the force, and the triangular PVDF piezoelectric film 1 fixedly connected to it will also deform accordingly. According to the piezoelectric effect, the wire connected to the PVDF piezoelectric film 1 will output electric energy. At the same time, under the action of wind force, the spherical mounting head 6 will rotate in the spherical cavity in the base, and the square plate 5 will move up and down between the upper support rod 2 and the lower support rod 4 along the stud 3, driving the four piezoelectric cantilever beams to vibrate. The square piezoelectric ceramic sheet 9 on the piezoelectric cantilever beam will deform, and according to the piezoelectric effect, the wire led out from the electrode sheet will output electric energy. In this device, the PVDF piezoelectric film 1 and the square piezoelectric ceramic sheet 9 can output electric energy simultaneously, thereby improving the capture efficiency of electric energy.

[0027] Those skilled in the art can understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as the general understanding of those of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as such here.

[0028] The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the present invention. The above has made a detailed description of the embodiments of the present invention, but the present invention is not limited to the above embodiments. Various changes can be made without departing from the gist of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. An umbrella-shaped composite piezoelectric power generation device using wind energy, characterized in that: it includes a support frame in the shape of a multi-pyramid, each side of the support frame is embedded with a triangular steel sheet, a PVDF piezoelectric film is pasted on the triangular steel sheet, and a wire is led out from the PVDF piezoelectric film; a upper support rod is vertically arranged downward at the center of the support frame, the lower part of the upper support rod is connected with a lower support rod through a double-headed stud, the diameter of the double-headed stud is smaller than the diameters of the upper support rod and the lower support rod, a square plate is slidably sleeved on the double-headed stud, several piezoelectric cantilever beams are evenly distributed on the periphery of the square plate, the piezoelectric cantilever beam includes a square steel sheet, a square piezoelectric ceramic sheet is arranged on the square steel sheet, a mass block is fixed at one end of the square piezoelectric ceramic sheet away from the square plate, and an electrode plate is also covered on the square piezoelectric ceramic sheet and a wire is led out; a base is arranged under the lower support rod, a spherical mounting head is rotatably arranged in the base, a round hole is opened at the upper end of the base, and the lower support rod passes through the round hole and is threadedly connected with the spherical mounting head; under the action of wind force, the spherical mounting head will rotate in the spherical cavity in the base, the square plate will move up and down between the upper support rod and the lower support rod along the double-headed stud, driving the four piezoelectric cantilever beams to vibrate, the square piezoelectric ceramic sheets on the piezoelectric cantilever beams are deformed, and according to the piezoelectric effect, the wires led out from the electrode plates will output electric energy; the upper end of the upper support rod is conical and is cooperatively connected with the top of the support frame; the support frame is in the shape of a hexagonal pyramid.

2. An umbrella-shaped composite piezoelectric power generation device according to claim 1, characterized in that: there are four piezoelectric cantilever beams.

3. An umbrella-shaped composite piezoelectric power generation device according to claim 1, characterized in that: the square steel sheet, the square piezoelectric ceramic sheet and the mass block are fixedly bonded together by glue.

4. An umbrella-shaped composite piezoelectric power generation device according to claim 1, characterized in that: the base is composed of a base upper cover and a base lower cover spliced together, a spherical cavity is arranged inside it, and the round hole is arranged in the middle of the base upper cover.

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