KR100622830B1 - High efficient small-sized electric generator using piezoelectric devic - Google Patents

Abstract

The present invention is configured to be mounted in a small shoe so that the kinetic energy consumed when walking or jogging can be converted into electrical energy and stored and supplied to an external electronic device, the present invention is a plate-like piezoelectric element itself or piezoelectric The method of construction of a series stacking structure in which a metal sheet bonded or deposited on a plate-shaped metal sheet is laminated at regular intervals within an elastic deformation that does not cause plastic deformation, and a plurality of parallel structures are installed in a shoe and installed inside the shoe. In addition, it has a structure for efficiently producing and storing power generated during jogging.

   The device can be mounted on shoes worn everyday while walking or jogging, and can be converted into electrical energy by using it. There is an advantage that can easily charge the rechargeable battery. In addition, the device can be used semi-permanently and drastically reduce the use of batteries, thereby reducing the waste of resources and contributing to the preservation of the natural environment.

Piezoelectric element, small generator, lamination, external force transmission device                                                                                                            

Description

High efficient small-sized electric generator using piezoelectric devic}

1 is an assembled perspective view of a high efficiency small power generator using a piezoelectric element according to the present invention;

Figure 2 is a perspective view showing a fixed state of the piezoelectric element by the fixed rod and the moving rod in the present invention

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Figure 4 is an internal assembly perspective view of a high efficiency small generator using a piezoelectric element according to the present invention

5 is a circuit diagram of a power processor of a high efficiency small generator using a piezoelectric element according to the present invention.

<Description of the code used in the main part of the drawing>

1: laminated part 2: case part

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3: external force transmission unit 4: piezoelectric support (another expression of fixing rod 43)

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11 piezoelectric element 21 upper case

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22: upper support portion fixing portion 23: support insert portion of the external force transmission device

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24: lower support portion fixing portion 25: case lower portion

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26: plate receiving external force 27: external force transmission support fixture

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31: fixed body of the moving rod 32: moving rod

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33: groove of the moving rod 41: fixed rod fixed body

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42: fixed rod 43: groove of the fixed rod

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51 bridge rectification circuit 52 condensation for current storage

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53: resistance to increase the amount of current and adjust the voltage

54: diode to prevent reverse current from the battery

55 storage battery

According to the present invention, a system in which a plate-shaped piezoelectric element (referred to as a plate-like piezoelectric element or a metal plate on which a piezoelectric element is adhered or deposited or a PVDF plate-type piezoelectric element) is compactly configured to be mounted in a shoe and consumed when walking or jogging. The present invention relates to a high efficiency small power generation system using a piezoelectric material capable of converting and storing kinetic energy into electrical energy to be supplied to an external electronic device.

   As the economic standard of living improves, the use of portable electronic devices such as mobile phones and MP3s is rapidly increasing, and the tendency of bonding electronic systems to regular wear such as clothes and shoes is occurring. Therefore, it is expected that the use of portable information devices such as momentum information shoes and location originating shoes, or small portable air conditioners and devices driven by batteries or capacitors will increase rapidly. They all use small batteries, but due to the capacity limitations of the batteries, they have a limited use time and require the use of specific equipment for charging or charging in limited areas. In addition, shoes with LEDs for signaling to protect pedestrians or joggers in the dark night have a limited lifespan and the possibility of environmental pollution by using disposable batteries.

    Small portable power generation system is very useful to solve the problem of the limited power supply capacity of these portable electronic devices and the problem of supplementing in a limited place when replenishing power. There is a result of the development of a power generating device that is passively generated for this purpose, but it is not generally used because it is relatively large and inconvenient to carry. In addition, there has been a proposal for a power generation system using shoes that are always worn to increase portability. The power generation system is a system that generates electric power by moving coils during walking between magnetic fields generated in a case surrounded by magnets. It is similar to the existing mechanical power generation system. This system has a problem that the power generation is very low and the efficiency is too low and the power generation is too small.

    The present invention devised a structure that enables efficient small-scale power generation using the principle of converting kinetic energy generated during walking or jogging into electrical energy using a piezoelectric element that generates power when deformation is applied by external pressure. Since the generation of electric power is proportional to the amount of deformation, the structure that can deform as much as possible without plastic deformation and the amount of power that can be generated by one piezoelectric element are very limited. A structure that causes large elastic deformation in all piezoelectric elements at the same time is the core content of the present invention. Invented system consists of a small structure in which a large number of piezoelectric elements cause large elastic deformation at the same time, and is mounted inside the shoe, and the external force generated when walking or jogging deforms the plurality of piezoelectric elements at the same time through the rectifier circuit to accumulate the battery. High efficiency small power generation system using piezoelectric elements stored in

The electrical energy generated from the piezoelectric element when the external physical force is applied shows a very high instantaneous voltage, but has a low current and relatively generates little power. The amount of power generated is also proportional to the amount of power generated according to the volume change of the piezoelectric element with respect to the external force applied to the piezoelectric element. Therefore, having a structure in which the deformation amount of impact is large can increase the power production, so that all piezoelectric elements are constructed by directly or several parallel thin film piezoelectric elements rather than generating power using one large piezoelectric element. It is most effective to apply external force at the same time.

The present invention is a structure of a series laminated structure in which a plurality of uni-morph type or bi-morph type piezoelectric thin plates are laminated at regular intervals within an elastic deformation that does not cause plastic deformation, and a structure in which those stacked in series are composed of a plurality of parallel structures. Has Structurally, the thin plate piezoelectric elements are configured in series or parallel, but all the currents generated in each piezoelectric element are integrated in parallel. Therefore, a system for structurally amplifying the micro current generation inherent in the piezoelectric element is constructed.

In addition, the structure is configured to be small in the shoe so that the external force applied to the shoe when walking or jogging is applied simultaneously to all the thin plate piezoelectric elements configured in series and parallel, the strength of the power generated every moment is configured piezoelectric element It provides a high efficiency small power generation performance using a piezoelectric element that is amplified and stored in proportion to the number of.

According to the present invention, in order to obtain maximum efficiency in a limited space of shoes, a plurality of plate-shaped piezoelectric elements 11 of small size and not easily damaged are laminated at regular intervals, and when an external force is applied to the stacked piezoelectric elements 11 simultaneously. It includes a structure to be modified.
1 is an assembled perspective view of a high efficiency small power generator using a piezoelectric element according to the present invention, Figure 2 is a perspective view showing a fixed state of the piezoelectric element by a fixed rod and a moving rod in the present invention, Figure 4 is according to the present invention FIG. 5 is an internal assembly perspective view of a high efficiency small power generator using a piezoelectric element, and FIG. 5 is a circuit diagram of a power processor of the high efficiency small power generator using the piezoelectric element according to the present invention.

As shown in the drawings, the present invention is composed of four parts, which includes a stacking part 1 formed by stacking plate-shaped piezoelectric elements, and a casing part which surrounds the stacking part to support the stacking part and protects the redness from the force applied from the outside. 2) The external force transmission unit 3 which simultaneously transmits the force generated from the outside to each piezoelectric element, and the square wave voltage generated every moment are commutated to form a bridge circuit and delay the rectified voltage to be well stored in the battery. It is composed of a power processor for constructing and storing a circuit.

As shown in FIG. 1 and FIG. 4, the stacking unit 1 is formed by stacking a plurality of plate-like piezoelectric elements 11 in series to form the same height so that a plurality of plate-like piezoelectric elements 11 may be installed in a shoe in parallel. . The plurality of series stacked parts 1 arranged in parallel are fixed to the upper and lower surfaces of the case part 2.

The case part 2 is divided into an upper part 21 and a lower part 25, and two plates are supported by a plurality of fixing rods 42 and configured to withstand external forces generated during walking or jogging. The impact force generated during walking or jogging is generated in the direction perpendicular to the surface of the stacking part 1 and in the direction in which the surface slides. On the case in order to support the piezoelectric elements 11 against the sliding direction, All the piezoelectric elements 11 are fixed to the inside of the case part 2 by a plurality of fixing rods 42 supporting the lower plates 21 and 25.
In this case, as shown in FIG. 2, the fixing rod 42 is provided with grooves 43 fitted into the side surfaces of all the plate-shaped piezoelectric elements 11. 11) can be fixed.
On the other hand, the upper plate 21 side of the case portion 2 is formed with an external force plate 26 configured to be spaced apart by a distance causing elastic deformation, and all the plate-shaped piezoelectric elements 11 on the external force plate 26 Moving rod 32 is formed with a plurality of grooves 33 for inserting the. When the external force applied to the shoe is transmitted to the plate 26 receiving the external force, all the piezoelectric elements 11 inserted into the grooves 33 are moved around the stationary rod 42 while the movable rod 32 is microscopically moved. Moments are generated to cause elastic deformation.
That is, according to the present invention, the movable rod 32 microscopically moves the piezoelectric element 11 up and down by the force generated vertically, and the fixing rod 42 supports the piezoelectric element 11 to be fixed. The piezoelectric element 11 is a structure that generates elastic deformation. When the external force disappears, the piezoelectric elements 11 which are pressurized by the spring of the metal plate which has propagated the piezoelectric elements 11 are restored to their original positions by the elastic force. The plurality of plate-shaped piezoelectric elements 11 stacked 1 are firmly fitted in the grooves 43 of the support rods to maintain the spacing of the elastic deformation even in the external force.

The stacked piezoelectric elements 11 have a structure in which an external force is transmitted by an external force transfer unit which simultaneously transmits an external force applied to a shoe during walking or jogging to all the piezoelectric elements 11. The external force transmission unit 3 is composed of a plate 26 which is mounted inside the shoe and receives the external force directly receiving the external force and a moving rod 32 which simultaneously transmits the external force to each piezoelectric element. The movable rod 32 is attached to the plate 26 which receives the external force directly by the number of the laminated parts 1 arranged in parallel of each pressure element. The moving rod 32 has a groove 33 equal to the number of piezoelectric elements 11 stacked in series, and one side of the plate-shaped piezoelectric element 11 is inserted into and fixed to the groove 33. The plate 26 which receives the external force, which is a part directly receiving the external force, has a distance apart from the upper plate 21 of the case part 2 fixing the stacking part 1, which is the piezoelectric element 11 elastically deformed. It is the distance causing it. When an external force is applied to the shoe, the external force is transmitted to the plate-shaped part 26 which receives the external force directly, and when this part moves to the upper end 21 of the case part 2, the external force is attached to the part directly receiving the external force inside the case 2. The movable rod 32 for transmitting the external force is moved by the same distance, and all the piezoelectric elements 11 inserted into the movable rod 32 form a structure in which the moment is received by the axis of the support portion 42 fixed to the axis. have. Therefore, the movable rod 32 is to be spaced apart from the lower plate of the case portion 2 or to be able to secure a small displacement distance by making a hole in the lower plate of the case portion.

The piezoelectric element 11 of the power generating device installed in the shoe is tensioned when the pressure is applied to the foot, and when the pressure disappears, two deformations of contraction occur, and at this time, the opposite polarity voltage is generated. This constitutes a bridge diode 51 as shown in Figure 5 to rectify the AC voltage generated in the piezoelectric element. It has a circuit structure of rectifying voltage generated in all piezoelectric elements and collecting their currents in parallel. Since all the generated power is in the form of an impulse, a delay circuit using the resistor 53 and the condenser 52 is configured to store power in the battery 55.

According to the above configuration and operation, the present invention can be constructed in a small number of piezoelectric elements according to the size of the shoe and the purpose of use, and built into the shoe to maximize the development in a limited space, thereby improving the efficiency of the space. There are advantages to it.

By converting the energy discarded when walking or jogging into electric energy using the present invention device mounted on a shoe, which is carried on a daily basis, and accumulating it, the portable electronic device is easily driven or charged without being restricted by a place. There is an advantage to this.

In addition, the device can be used semi-permanently and drastically reduce the use of batteries, thereby reducing the waste of resources and contributing to the preservation of the natural environment.

Claims (3)

The laminated part 1 formed by laminating the plate-shaped piezoelectric element 11 and the case part 2 which surrounds and supports the said laminated part 1 and protects the laminated part 1 from the force applied from the outside, and generate | occur | produces from the outside. In constructing a high efficiency small power generation system using a piezoelectric element 11 composed of an external force transmission unit 3 which simultaneously transmits a force to each piezoelectric element 11, The stacking unit 1 is arranged in such a way that a plurality of plate-like piezoelectric elements 11 stacked in series in the same height can be installed in a shoe in parallel, A plurality of plate-like piezoelectric elements 11 of the stacking part 1 are fixed to the upper and lower surfaces 21 and 25 of the case part 2, and a plurality of grooves 43 are formed to insert side surfaces of all the plate-like piezoelectric elements 11. High efficiency small size generator using a piezoelectric element, characterized in that fixed by four fixing rods (42). The high efficiency small generator using the piezoelectric element according to claim 1 On the upper plate 21 side of the case portion 2 is formed a plate 26 which receives an external force configured to be separated by a distance causing elastic deformation, and all the plate-shaped piezoelectric elements 11 are placed on the plate 26 which receives the external force. By attaching the movable rod 32 is formed a plurality of grooves 33 to be inserted, When the external force applied to the shoe is transmitted to the plate 26 which receives the external force, all the piezoelectric elements 11 inserted into the grooves 33 are moved around the fixed rods 42 while the movable rods 32 are minutely moved. High-efficiency small generator using a piezoelectric element, characterized in that the moment occurs to cause elastic deformation. The high efficiency small generator using the piezoelectric element according to claim 2 The shock wave form generated when the external force is applied to the voltage of the opposite polarity generated by the elastic deformation and restoration of the piezoelectric element 11 constitutes the bridge diode 51 to rectify the AC voltage generated in all the piezoelectric elements 11, A piezoelectric element comprising a power processing unit including a delay circuit using a resistor 53 and a condenser 52 to configure a circuit for collecting all rectified currents in parallel and to store an impulse-type current in the storage battery 55. High efficiency small generator using device.

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