KR101040111B1 - Electric generators using piezoelectric materials - Google Patents

Abstract

The present invention relates to a generator using a piezoelectric element that generates electricity when subjected to pressure or bending. More particularly, the present invention relates to energy dissipated from a structure such as vibration of a structure, that is, due to a moving load or wind load of a vehicle acting on a structure such as a bridge. The present invention relates to a generator using a piezoelectric material capable of increasing the amount of power generated by converting both the tensile force and the compressive force of the generated member to act as a compressive force.

The present invention is characterized in that in a generator using a piezoelectric body, both the compressive force and the tensile force acting on the structure are converted into a compressive force, thereby generating electricity by the bending of the piezoelectric body by the compressive force.

Generator, piezoelectric, compression, tensile, structure, block

Description

Electric generators using piezoelectric materials

The present invention relates to a generator using a piezoelectric element that generates electricity when subjected to pressure or bending. More particularly, the present invention relates to energy dissipated from a structure such as vibration of a structure, that is, due to a moving load or wind load of a vehicle acting on a structure such as a bridge. The present invention relates to a generator using a piezoelectric material capable of increasing the amount of power generated by converting both the tensile force and the compressive force of the generated member to act as a compressive force.

In general, a piezoelectric material refers to a material in which polarization is induced inside a material when the external mechanical pressure is applied or mechanical deformation occurs due to an external electric field. There is a characteristic to generate.

Therefore, if the above characteristics of the piezoelectric material are used, electricity can be generated without the consumption of fuel. Recently, research on the power generation method using the piezoelectric material has been actively conducted.

In one embodiment of the Republic of Korea Patent Publication No. 10-0769645 discloses a piezoelectric generator for bridges, the main configuration of the piezoelectric element is converted to electrical energy by receiving an external force, a plurality of receiving the piezoelectric body to form a bridge A receiving member fixed to one of the members, the insertion member slidably received in the receiving member in a direction facing the piezoelectric member and fixed to another member of the plurality of members constituting the bridge and the insertion member It is disposed between the receiving member side end and the piezoelectric body is accommodated inside the receiving member, and comprises a head for transmitting an external force acting on the insertion member to the piezoelectric body.

Therefore, through the configuration as described above there is an advantage that can generate the electrical energy using the vibration energy transmitted to the bridge by the vehicle or the like passing through the bridge or the mechanical energy transmitted to the bridge by the strong wind, When tension, compression, bending, etc. occur, it can be converted into electric energy only in one direction of force, that is, for each pressure. There was a drawback that power is not used and is destroyed.

The present invention has been made to solve the above problems, an object of the present invention is to use the energy generated by the moving load or wind load of the vehicle in a construction structure, such as a bridge to illuminate the illumination of the bridge or radio measuring system An object of the present invention is to provide a generator using a piezoelectric material capable of producing power for power supply.

In addition, the present invention converts both the tensile force and the compressive force of the member generated by the moving load, the wind load acting on the building structure, such as bridges to act only as a compressive force to maximize the piezoelectric effect to increase the amount of power generation generator using a generator There is another purpose in providing it.

The present invention for achieving the above objects,

In a generator using a piezoelectric body, it is characterized by converting both the compressive force and the tensile force acting on the structure into a compressive force, thereby generating electricity by the bending of the piezoelectric body by the compressive force.

At this time, the generator is connected to the plurality of blocks, the piezoelectric plate is coupled between the block, the electrode plate is coupled to the upper and lower sides of the piezoelectric plate, and the electrode plate is generated by the compression force of the piezoelectric plate Characterized in that it comprises an energy conversion unit for converting the converted electrical energy into a usable current.

Here, the block is characterized by consisting of the first and second blocks of the '' 'shape, and the third and fourth blocks of the rectangular parallelepiped shape.

In addition, the first and second blocks are coupled such that the recesses cross each other in a direction facing each other, and the third and fourth blocks are coupled to the outer surfaces of the first and second blocks, respectively. .

The piezoelectric plate may include first and second piezoelectric plates having a square shape, and third to sixth piezoelectric plates having a rectangular shape.

In this case, the first and second piezoelectric plates are coupled in the horizontal direction between the first block and the second block, and the third and fourth piezoelectric plates are coupled in the longitudinal direction between the first block and the third block. The fifth and sixth piezoelectric plates may be horizontally coupled between the second block and the fourth block.

In addition, the generator is characterized in that it further comprises a storage battery for charging the current converted in the energy conversion unit.

According to the generator using the piezoelectric body according to the present invention, by using a piezoelectric generator that generates electricity under pressure or bending, the generator is attached to the inside or outside of the structure in which the tension and compression forces alternately act as a cable of a bridge, and the tension and compression forces By utilizing all the energy by the has an excellent effect to increase the amount of power generated.

In addition, according to the present invention by converting both the tensile force and the compressive force of the member generated by the moving load, the wind load acting on the building structure, such as bridges to act only as a compressive force to maximize the piezoelectric effect by the price of a thin piezoelectric plate In addition, it has an effect that can obtain a high efficiency compared to.

Hereinafter, a preferred embodiment of a generator using a piezoelectric body according to the present invention with reference to the accompanying drawings will be described in detail.

1 is a perspective view showing a generator using a piezoelectric body according to the present invention, Figure 2 (a) ~ (f) is a perspective view showing a coupling process of the block and the piezoelectric plate used in the present invention, Figure 3 Figure 4 is a perspective view showing the state after the block and the piezoelectric plate used in combination, Figure 4 is a cross-sectional view taken along line AA 'of FIG.

The present invention converts both the tensile force and the compressive force of the member generated by the moving load or the wind load of the vehicle acting on the structure such as the bridge, such as the vibration of the structure, to act only as the compressive force, thereby improving the piezoelectric effect. The present invention relates to a generator 100 using a piezoelectric material capable of maximizing and increasing power generation. The configuration of the generator 100 includes a plurality of blocks 10, a piezoelectric plate 20, an electrode plate 30, and an energy conversion unit 40. It is configured to include.

That is, the present invention combines the piezoelectric plate 20 between the plurality of blocks 10 to convert both the compressive force and the tensile force acting on the structure, such as bridges into a compressive force to use a conventional compressive force only or a generator using only a tensile force Otherwise, it is to be able to generate electricity through the piezoelectric plate (piezoelectric) 20 by using both compressive and tensile forces.

More specifically, the block 10 is configured to form a body of the generator 100 by combining a plurality dogs in the present invention, as shown in (a) to (f) of Figure 2, the first to fourth blocks (11, 12, 13, 14), that is, a total of four blocks 10 are used. In this case, the first and second blocks 11 and 12 are formed in a 'c' shape, and the third and fourth blocks 13 and 14 are formed in a rectangular parallelepiped shape and are coupled to each other. The coupling relationship between the fourth and fourth blocks 11, 12, 13, and 14 will be described later.

Next, the piezoelectric plate 20 is coupled between the blocks 10, that is, the first to fourth blocks 11, 12, 13, and 14, and is bent by compressive and tensile forces acting on a building structure such as a bridge. A total of six piezoelectric plates 20 are used in the present invention to serve to generate electricity.

That is, as shown in FIG. 2A, the piezoelectric plate 20 includes square first and second piezoelectric plates 21 and 22 and rectangular third to sixth piezoelectric plates 23. 24, 25, and 26, and roles and coupling relations of the first to sixth piezoelectric plates 21, 22, 23, 24, 25, and 26 will be described later.

In addition, the electrode plate 30 is attached to one side, the lower surface of the piezoelectric plate 20 to serve to move the electricity generated in the piezoelectric plate 20 to the energy conversion unit 40 to be described later. As the electrode plate 30, a metal having high electrical conductivity such as copper (Cu) is preferably used.

On the other hand, the energy conversion unit 40 serves to convert the electric energy generated while the piezoelectric plate 20 is bent by the compressive or tensile force acting on the structure into a usable current, the electrode plate 30 Is electrically connected by wires or the like.

That is, as will be described later, the generator 100 using the piezoelectric body according to the present invention is installed in a building structure such as a bridge, when the external force such as compressive force or tensile force acts on the building structure, the first to fourth blocks (11, 12, 13, The first to sixth piezoelectric plates 21, 22, 23, 24, 25, and 26 disposed between the 14 bend to generate electricity while being bent under the compressive force, and the generated electric energy is an outer surface of the piezoelectric plate 20. Through the electrode plate 30 coupled to the energy conversion unit 40 is to be converted into a current that can be used.

At this time, as shown in Figure 1, the energy conversion unit 40, the storage battery 50 may be connected to the installation, the storage battery 50 to charge the current converted by the energy conversion unit 40 Play a role.

That is, when the generator 100 using the piezoelectric body according to the present invention is installed on the bridge to use the electric energy generated by the moving load or the wind load of the vehicle to illuminate the bridge, the vehicle is generated during the day when the moving amount of the vehicle is large. After charging the electrical energy to the storage battery 50, it is possible to use a variety of applications, such as to brighten the lighting using the electrical energy charged at night.

Hereinafter, with reference to the accompanying drawings will be described in detail the assembly process and the operating relationship of the generator 100 using a piezoelectric body according to the present invention.

First, as shown in FIG. 2A, the first to fourth blocks 11, 12, 13, and 14 and the first to sixth piezoelectric plates 21 and 22 for constituting the body of the generator 100 are shown. Prepare 23, 24, 25, and 26. At this time, the upper and lower surfaces of the first to sixth piezoelectric plates 21, 22, 23, 24, 25, and 26 transmit electric energy generated from the piezoelectric plate 20 to the energy converter 40. The electrode plate 30 is coupled to.

Next, as shown in (b) of FIG. 2, one side ends of the first and second piezoelectric plates 21 and 22 having a square shape are formed inside the vertical portion of the first block 11 having a 'c' shape. To be spaced apart from each other by a certain distance to combine in the horizontal direction.

Thereafter, as shown in (c) of FIG. 2, the second block 12 having a 'c' shape is alternately coupled with the first block 11, and the first block 11 and the first block 11 are combined with each other. The other ends of the first and second piezoelectric plates 21 and 22 coupled to the first block 11 in the horizontal direction by engaging the concave portions of the two blocks 12 facing each other are connected to the second block 12. To be combined.

Next, as shown in (d) of FIG. 2, one end portions of the fifth and sixth piezoelectric plates 25 and 26 having a rectangular shape on the outer surface of the second block 12 are spaced apart from each other in the horizontal direction. As shown in FIG. 2E, the fourth block 14 having a cuboid shape is horizontally coupled to the other ends of the fifth and sixth piezoelectric plates 25 and 26.

Thereafter, as shown in FIG. 2 (f), one side ends of the third and fourth piezoelectric plates 23 and 24 having a rectangular shape on the outer surface of the first block 11 are fixed to each other in the longitudinal direction. When coupled to the spaced apart, when the third block 13 of the rectangular parallelepiped to the other end of the third and fourth piezoelectric plates (23, 24) in the longitudinal direction as shown in Figure 3 the piezoelectric body according to the invention The body part of the used generator 100 is completed, and finally, energy is supplied to the electrode plate 30 attached to the upper and lower surfaces of one end of the first to sixth piezoelectric plates 21, 22, 23, 24, 25, and 26. When the converter 40 is connected and the capacitor 50 is connected to the energy converter 40, the generator 100 using the piezoelectric body according to the present invention is completed as shown in FIG. 1.

When the tensile force or the compressive force is applied to the generator 100 using the piezoelectric body according to the present invention by the configuration as described above, both the tensile force or the compressive force can be used to bend the piezoelectric plate 20 can generate electricity When the tensile force acts from both sides of the generator 100, the force acts in a direction in which the first block 11 and the second block 12 formed in the 'c' shape pull each other. The first and second piezoelectric plates 21 and 22 having a square shape installed between the block 11 and the second block 12 are bent under the compressive force, thereby generating electricity, and the compressive force in the same direction. In this case, all of the first to sixth piezoelectric plates 21, 22, 23, 24, 25, and 26 are bent under compression, thereby generating electricity.

In addition, by changing the installation position of the generator 100 as described above, that is, by installing the body portion shown in Figure 3 by rotating in the horizontal or vertical direction may be generated electricity using the tensile force and the compressive force acting in all directions. Of course.

Therefore, according to the generator 100 using the piezoelectric body according to the present invention, not only can generate electricity by using the energy dissipated in the structure, such as the vibration of the structure, but also the tension and compression force while vibrating like a cable of a bridge. By attaching the generator 100 to the inside or outside of the alternating structure to utilize both the energy by the tensile force and the compressive force to have a variety of advantages, such as to increase the amount of power generated.

Although the foregoing embodiments have been described with respect to the most preferred embodiments of the present invention, it is apparent to those skilled in the art that the present invention is not limited to the above embodiments and various modifications can be made without departing from the spirit of the present invention. will be.

The present invention relates to a generator using a piezoelectric element that generates electricity when subjected to pressure or bending. More particularly, the present invention relates to energy dissipated from a structure such as vibration of a structure, that is, due to a moving load or wind load of a vehicle acting on a structure such as a bridge. The present invention relates to a generator using a piezoelectric material capable of increasing the amount of power generated by converting both the tensile force and the compressive force of the generated member to act as a compressive force.

1 is a perspective view showing a generator using a piezoelectric body according to the present invention.

Figure 2 (a) ~ (f) is a perspective view showing a coupling process of the block and the piezoelectric plate used in the present invention.

Figure 3 is a perspective view showing a state after the coupling of the block and the piezoelectric plate used in the present invention.

4 is a cross-sectional view taken along the line AA ′ of FIG. 3.

Explanation of symbols on the main parts of the drawings

10: block 11: first block

12: second block 13: third block

14: 4th block 20: piezoelectric plate

21: first piezoelectric plate 22: second piezoelectric plate

23: third piezoelectric plate 24: fourth piezoelectric plate

25: fifth piezoelectric plate 26: sixth piezoelectric plate

30: electrode plate 40: energy conversion unit

50: storage battery 100: generator

Claims (7)

In a generator using a piezoelectric body, Both compressive and tensile forces acting on the structure are converted into compressive forces, generating electricity by bending the piezoelectric body by the compressive forces, The generator includes a plurality of blocks, a piezoelectric plate coupled between the blocks, an electrode plate coupled to one side and an underside of the piezoelectric plate, and connected to the electrode plate to generate electricity generated by the compression force of the piezoelectric plate. Generator using a piezoelectric element comprising an energy conversion unit for converting energy into a usable current. delete The method of claim 1, The block is a generator using a piezoelectric body, characterized in that consisting of 'b' shaped first and second blocks, and cuboidal third and fourth blocks. The method of claim 3, The first and second blocks are coupled so that the concave portions are crossed with each other in a direction facing each other, and the third and fourth blocks are coupled to the outer surfaces of the first and second blocks, respectively. Used generator. The method of claim 4, wherein The piezoelectric plate is a generator using a piezoelectric body, characterized in that consisting of the first and second piezoelectric plate made of a square shape, and the third to sixth piezoelectric plate made of a rectangular shape. The method of claim 5, The first and second piezoelectric plates are horizontally coupled between the first block and the second block, and the third and fourth piezoelectric plates are vertically coupled between the first block and the third block. The fifth and sixth piezoelectric plates are piezoelectric generators, characterized in that coupled between the second block and the fourth block in the transverse direction. The method according to any one of claims 1 and 3 to 6, The generator is a generator using a piezoelectric element characterized in that it further comprises a storage battery for charging the current converted in the energy conversion unit.

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