WO2016111601A1 - Appareil de génération d'énergie électrique - Google Patents

Appareil de génération d'énergie électrique Download PDF

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Publication number
WO2016111601A1
WO2016111601A1 PCT/KR2016/000235 KR2016000235W WO2016111601A1 WO 2016111601 A1 WO2016111601 A1 WO 2016111601A1 KR 2016000235 W KR2016000235 W KR 2016000235W WO 2016111601 A1 WO2016111601 A1 WO 2016111601A1
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Prior art keywords
piezoelectric
elastic body
displacement
force
generating device
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PCT/KR2016/000235
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English (en)
Korean (ko)
Inventor
이상구
권명주
Original Assignee
(주)아이블포토닉스
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Priority claimed from KR1020150003159A external-priority patent/KR101659283B1/ko
Priority claimed from KR1020150101215A external-priority patent/KR101712817B1/ko
Application filed by (주)아이블포토닉스 filed Critical (주)아이블포토닉스
Publication of WO2016111601A1 publication Critical patent/WO2016111601A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators

Definitions

  • the present invention relates to an electrical energy generating apparatus, and more particularly, to an electrical energy generating apparatus which can obtain more electrical energy by pressing a piezoelectric body.
  • Methods of generating electricity using mechanical movement include (1) coil / magnet-based electromagnetic induction generation, (2) electrostatic generation using variable capacitors, and (3) piezoelectric generation.
  • the method of (1) is very widely used as in the case of general motors or turbines, but it is difficult to make the size / weight of the system small, and the method of (2) is a cycle of charge / mechanical deformation / discharge / mechanical deformation (ie, reversal). It is complex because the design must be made with the circuit to go through.
  • (3) In the case of power generation using piezoelectric material, mechanical force is applied to the piezoelectric material to induce deformation of size, and the structure of the piezoelectric material is very simple and miniaturized by generating electricity. There is an advantage in that there is an active research on this.
  • the piezoelectric material is a material that generates electricity when the size is changed by an external force.
  • the size deformation of a material must occur largely, quickly and frequently to generate a large amount of electricity.
  • a piezoelectric power generator of a cantilever structure has been mainly used in an environment having high frequency mechanical vibration.
  • the piezoelectric generator of the cantilever structure can be operated efficiently by generating a large and fast displacement only when the surrounding mechanical vibration is similar to the inherent resonance frequency of the cantilever, and when the frequency is not matched, it generates a large electricity. There is difficulty.
  • the piezoelectric generator of a general cantilever structure cannot generate a large amount of electricity.
  • the present invention has been made to solve the above problems, it is an object of the present invention to provide a device that can generate more electrical energy by pressing the piezoelectric body.
  • Another object of the present invention is to provide an electric energy generating device for vibrating a piezoelectric body using a spring.
  • Another object of the present invention is to provide an electric energy generating device capable of obtaining the required electric energy by simply pressing the user without using a battery.
  • Piezoelectric bodies having at least two surfaces
  • An elastic body positioned on at least one surface of the surface of the piezoelectric body and transmitting a displacement to the piezoelectric body
  • the other surface corresponding to the surface on which the elastic body is located is provided with an electric energy generating device having a means for accommodating the displacement of the piezoelectric body.
  • the elastic body is changed in the form of vibration repeating the increase and decrease the force applied to the elastic body when the deformation is pressed in one direction by the application of an external force, so that the displacement vibrating on the piezoelectric body Electrical energy generating device is provided.
  • the piezoelectric material includes a piezoelectric material layer having a first electrode provided on a first surface and a second electrode provided on an opposing second surface.
  • the piezoelectric body may be provided on one or both surfaces of the substrate.
  • the elastic body includes N unit elastic bodies (where N is two or more), and the number of vibrations may be N times or less.
  • the substrate may serve to support the piezoelectric material, but may have a material and a structure that do not substantially limit the piezoelectric displacement due to the displacement transmitted from the elastic body.
  • the other surface of the surface of the piezoelectric body corresponding to the surface where the elastic body is located is provided with a space that can accommodate the displacement of the piezoelectric body
  • It may be provided with a protrusion that can cause the twisting movement of the piezoelectric body selectively between the space or the piezoelectric body and the elastic body.
  • the piezoelectric body may be made of a piezoelectric single crystal or a piezoelectric material.
  • the piezoelectric body may have a piezoelectric characteristic of d33, d15 or d31 mode.
  • the piezoelectric body may be formed of a piezoelectric material layer having a first electrode provided on a first surface and a second electrode provided on an opposing second surface.
  • the substrate may serve as the elastic body without a separate elastic body, and the substrate may have a structure for transferring the cantilevered displacement generated by the pressing means to the piezoelectric body.
  • a plurality of unit generators may have a structure in a series or parallel structure.
  • the unit elastic body is a snap dome having an upper surface and a lower surface
  • the snap dome may be stacked so that the upper surface is in contact with each other, the lower surface is in contact with the lower surface.
  • the present invention even if a mechanical force is directly applied to the piezoelectric body, a problem of the prior art in which a small amount of electric energy or no electric energy can be obtained due to the low frequency is solved by the present invention. That is, when a force is applied in the form of a person pushing a button, the rate of rise of the voltage is so low that the electric energy generated from the piezoelectric body is consumed as a leakage current, and the magnitude of displacement of the piezoelectric body is solved. The problem is limited and the increase in voltage is simply limited in one direction.
  • the electric energy can be obtained by adopting a new structure using a piezoelectric body and a spring so that the user can generate a sufficient electric energy only by pressing a button mechanically.
  • the piezoelectric element can be vibrated with a larger displacement by adopting a structure that transmits the force to the piezoelectric element for a short time.
  • the current due to the vibration of the piezoelectric body can be obtained as an alternating current component, and can generate much larger electrical energy than the electrical energy of the piezoelectric body due to simple pressurization.
  • 1 and 2 are graphs schematically showing the relationship between the displacement of the elastic body and the force applied to the elastic body.
  • 3 to 5 are schematic exploded perspective views of an electric energy generating device according to various embodiments of the present disclosure.
  • FIG. 6 is a schematic cross-sectional view of an electrical energy generating device according to another embodiment of the present invention.
  • FIG. 7A and 7B schematically illustrate a state in which an electric energy generating device is mounted on an experimental device in order to measure a voltage of electric energy generated in the electric energy generating device.
  • FIG. 8 is a graph of voltage over time showing test results of the electric energy generating device shown in FIGS. 7A and 7B.
  • 9A and 9B are photographs showing a state and an experimental process of applying the apparatus according to the present invention to a mobile phone home button.
  • FIG. 10 shows the results of experiments using the apparatus of FIGS. 9A and 9B.
  • FIG. 11 is a photograph showing an example of a snap dome.
  • FIG. 12 schematically illustrates the snap dome cross-sectional shape in which deformation occurs when a pressing force is applied.
  • 13 is a cross-sectional view schematically showing the shape of the snap dome stack.
  • 16 schematically illustrates a method for measuring power generation of a snap dome stack according to an embodiment of the present invention.
  • Figure 17 shows the actual manufacturing process of the snap dome stack according to an embodiment of the present invention.
  • 18A and 18B show an operation test process of a piezoelectric generator manufactured according to one embodiment of the present invention.
  • 19 shows the results of a push experiment according to the number of snap domes of a snap dome stack according to an embodiment of the present invention.
  • 20 is a graph showing the energy generation form of a piezoelectric generator according to an embodiment of the present invention.
  • the present invention has the advantage that a sufficient electrical energy can be obtained by adopting a new structure that can generate a lot more electrical energy than the existing by converting the force of the low frequency applied to the piezoelectric material to a high frequency, such a feature May be used to power sensor nodes in wireless sensor networks or the Internet of Things (IoT), which have recently gained increasing interest.
  • IoT Internet of Things
  • it is applied to a shoe or insole that generates electricity while walking, and may be used immediately after being temporarily stored in a battery or as a power source for driving a smart shoe or a smart insole. In this case, it is possible to replace the existing battery or to replace the power supply of wired and wireless charging method.
  • the military boots walking is expected to be able to recharge or directly supply the electrical energy required by the soldiers.
  • It can be used to power sensor nodes in wireless sensor networks or the Internet of Things (IoT), which have recently gained increasing interest.
  • IoT Internet of Things
  • it is applied to a shoe or insole that generates electricity while walking, and may be used immediately after being temporarily stored in a battery or as a power source for driving a smart shoe or a smart insole.
  • it is possible to replace the existing battery or to replace the power supply of wired and wireless charging method.
  • the military boots walking is expected to be able to recharge or directly supply the electrical energy needed by the soldiers.
  • the external force provided by the user is accumulated in an elastic body such as a spring, and the electrical force is produced by releasing the accumulated force for a relatively short time to vibrate the piezoelectric body.
  • the electric energy generating device includes a piezoelectric body having at least two surfaces;
  • An elastic body positioned on at least one surface of the surface of the piezoelectric body and transmitting a displacement to the piezoelectric body
  • the elastic body is an electrical energy generating device that when the deformation is pressed in one direction by the application of an external force, the force applied to the elastic body is changed in the form of a vibration repeating the increase and decrease, so that the displacement vibrating on the piezoelectric body to occur. Is provided.
  • the elastic body preferably comprises N unit elastic bodies (where N is two or more), and the number of vibrations may be N times or less.
  • the unit elastic bodies may be stacked such that displacement of each unit elastic body sequentially causes displacement of other unit elastic bodies.
  • the elastic body is like a spring, for example a buckling spring, in which the relationship of force to displacement is nonlinear. After the elastic body accumulates the applied external force as a displacement, the elastic body can transfer the accumulated external force to the piezoelectric body for a short time when the specific displacement is exceeded.
  • the piezoelectric element vibrates by displacement for a short time when the external force is applied and when the external force is removed, respectively, and the vibration of the piezoelectric element is sufficient to generate electrical energy.
  • depth x When the displacement of the unit when pressing the elastic body by the pressing means that depth x is 0 and the initial depth of the snap-may be called the depth of time lead to buckling (snap-through-bucking) x 1 - through.
  • the maximum displacement of the unit elastic body, that is, the depth when it touches the floor, may be referred to as x 3 .
  • x 2 and x 3 is defined as the depth having a power and the power of the same size in x 1 in sayi x 2 ', and increasing the pressing force applied to the pressing means, measuring the depth of the depth x 1 as in the second When it reaches, it will be pressed down to depth x 2 'without increasing the force.
  • snap-through-buckling means that in the general mechanical force (F) -strain curve, the deformation increases with the external force.
  • Force indicates that there is a decreasing interval.
  • F the mechanical force
  • Force indicates that there is a decreasing interval.
  • the elastic body having such elastic properties examples include, but are not limited to, a buckling spring, a snap-through buckle spring, a disk spring, a dome spring, and the like.
  • the substrate itself may serve as an elastic body.
  • the substrate may serve as the elastic body without a separate elastic body, and the substrate may have a structure for transferring the cantilevered displacement generated by the pressing means to the piezoelectric body.
  • Snapdom is generally used as an ultra-thin push switch (see http://www.inovan.de/, http://www.snaptron.com/), one example of which is shown in FIG.
  • the edges touch the floor but the middle part is slightly floating, so if you press the middle part, before the center part touches the floor, the pressing force of the center is suddenly transmitted to the edge and it turns off completely. Snap-through-buckling.
  • An electric energy generating device comprises: a piezoelectric body having at least two surfaces; An elastic body positioned on at least one surface of the surface of the piezoelectric body and transmitting a displacement to the piezoelectric body; And means for accommodating displacement of the piezoelectric body on the other surface corresponding to the surface on which the elastic body is located.
  • Displacement of the elastic body transferred to the piezoelectric body may be generated by pressing means for transmitting a force to the elastic body.
  • 3 to 5 are schematic exploded perspective views of an electric energy generating apparatus having a piezoelectric body according to various embodiments of the present disclosure. Since this is only an example of the present invention, the present invention is not limited to this structure, and various modifications are possible within the scope of the present invention.
  • FIGS. 3 to 5 illustrate a case where a disc spring is used as an elastic body, but is not limited thereto, and the elastic body according to the present invention may be used without limitation as long as the elastic body according to the present invention has the elasticity as described above with reference to FIGS. 1 and 2. Can be.
  • the electric energy generating device is provided on a substrate 10, a first electrode 12a disposed on the substrate 10 and provided on a first surface, and on an opposing second surface.
  • a piezoelectric body 11 having a second electrode 12b formed therein, pressing means 15 disposed on the piezoelectric body 11 so as to pressurize the piezoelectric body 11, the piezoelectric body 11 and the pressing It is provided with a spring 13 arranged between the means 15.
  • the other side of the substrate on which the piezoelectric body is located is provided with means (16, 17, 18) for receiving the displacement of the piezoelectric body transmitted by the displacement of the spring.
  • Figure 3 is an elastic sheet 16 such as rubber or foam foam
  • Figure 4 is a ring-shaped structure 17 can provide a space
  • Figure 5 is a piezoelectric or Two or more columnar structures 18 are shown to form a space by separating the substrate on which the piezoelectric body is formed from other structures at predetermined intervals.
  • various modifications may be possible.
  • the piezoelectric body 11 is supported on the first surface of the substrate 10. As shown, the piezoelectric body may be formed only on one surface of the substrate, but the present invention is not limited thereto, and the piezoelectric body may be formed on both surfaces of the substrate.
  • the substrate 10 preferably serves to support the piezoelectric material, but has a material and a structure that do not substantially limit the piezoelectric displacement due to the displacement transmitted from the elastic body.
  • a material such as a copper plate or an aluminum plate that is thin and stirs is preferable.
  • the insulating layer 10a, 10b may be formed on the first surface and the opposite second surface of the substrate 10, respectively.
  • the piezoelectric body 11 may be made of a piezoelectric single crystal or a piezoelectric material.
  • it may be made of a piezoelectric single crystal or piezoceramic, or a piezoelectric polymer containing or not containing lead.
  • Piezoelectric single crystals have a structure in which fine particles having a predetermined structure are regularly arranged.
  • the piezoelectric body may have a piezoelectric characteristic of d33, d15, or d31 mode.
  • the piezoelectric single crystal may be a solid solution single crystal of magnesium niobate (PMN), which is a relaxor, and lead titanate (PT), which is a piezoelectric body.
  • PMN magnesium niobate
  • PT lead titanate
  • the piezoelectric distortion is three times or more, compared with the conventional piezoelectric material, the electromechanical coupling coefficient is large, and excellent piezoelectric properties are exhibited.
  • piezoelectric ceramics such as lead zirconate titanate (PZT) ceramics, which are examples of known piezoelectric materials, can be used.
  • the first electrode 12a is formed on the first surface of the piezoelectric element 11, and the second electrode 12b is formed on the opposing second surface.
  • the electrodes 12a and 12b are connected to terminals of a circuit board (not shown) through wires not shown.
  • the disk spring 13 exemplified as an elastic body has a shape of a part or a dome as a whole, the bottom part is opened and the top part is formed with an opening. In other examples not shown in the figures, the opening may be closed.
  • the elastic body is not limited to the shape as shown in FIGS. 3 to 5, and may be used without limitation as long as it has elasticity as described above with reference to FIGS. 1 and 2.
  • the relationship between the displacement of the elastic body and the force can cause the piezoelectric body disposed adjacent to the elastic body to vibrate.
  • the displacement of the elastic body can produce the displacement of the piezoelectric body.
  • the magnitude of the force at the moment of removing the force at the end of the inversion region is smaller than the magnitude of the maximum force in the proportional region. Therefore, assuming that the elastic body is pressed, the force is in the opposite direction in the proportional region to push it, so that the piezoelectric element disposed under the elastic body can generate a force to move in the form of free vibration.
  • the spring constant uses an elastic body in which k may have a negative (-) region.
  • the piezoelectric material includes a piezoelectric material layer having a first electrode provided on a first surface and a second electrode provided on an opposing second surface.
  • Displacement of the elastic body transferred to the piezoelectric body may be generated by pressing means for transmitting a force to the elastic body.
  • a button is arranged as the pressing means 15 capable of pressing the spring 13 on top of the spring 13.
  • the button can have any shape that allows the user to press the spring 13.
  • a protrusion can be formed which can be inserted into an opening formed in the upper portion of the spring 13.
  • An insulating layer 14 is formed on the bottom surface of the button to provide electrical insulation between the spring 13 and the button.
  • the user can deform the spring 13 by pressing the pressing means 15 such as a button.
  • the pressing means 15 such as a button.
  • the spring 13 is restored to its original state through the relationship of displacement and force as described with reference to FIGS. 1 and 2, which pressurizes and restores the spring 13.
  • the piezoelectric body 11 is vibrated in the process. The vibration of the piezoelectric body 11 generates electrical energy, and the generated electrical energy can be supplied through a wire connected to the electrodes 12a and 12b.
  • 3 to 5 illustrate an example in which an elastic body is positioned between the pressing means and the piezoelectric body, but is not limited thereto.
  • the piezoelectric body may be designed to be positioned between the pressing means and the elastic body. In any case, if the displacement of the elastic body is transferred to the piezoelectric body so that the piezoelectric body can have a displacement, that is, it can vibrate, the electric energy generating device according to the present invention can be implemented.
  • the substrate may serve as the elastic body without a separate elastic body, and the substrate may have a structure for transferring the cantilevered displacement generated by the pressing means to the piezoelectric body.
  • FIG. 6 is a schematic cross-sectional view of an apparatus for transmitting cantilevered displacement to a piezoelectric body.
  • the protrusions 26 are formed on the pillars 24 of the button 15, and the piezoelectric body 21 is formed on one surface or both surfaces of the substrate 23.
  • the substrate 23 may be a circular substrate having an opening formed in the center thereof, or may have a structure in which a plurality of rectangular substrates in the form of a spring board are symmetrically disposed about the pillar of the button.
  • the protrusion 26 presses the inner end of the substrate 23 downward and presses the button 25 further to lower the protrusion 26 to raise the substrate 23.
  • the piezoelectric body 21 formed on the substrate 23 vibrates while being bounced in the direction. In this case, the substrate 23 simultaneously serves as an elastic body.
  • the electric energy generating device according to the present invention as a unit generator, it is possible to have a structure in which a plurality of unit generators are assembled in series or parallel structure.
  • FIG. 7A and 7B schematically illustrate a state in which an electric energy generating device is mounted on an experimental device for measuring a voltage of electric energy generated in the electric energy generating device.
  • FIG. 7A is an electrical energy generator having an elastic body according to the present invention
  • FIG. 7B is an electrical energy generator without an elastic body.
  • the metal plate 30 is supported by the support 40, and the piezoelectric element 31, the elastic body 33, and the pressing means 35 are disposed on the metal plate 30.
  • the metal plate 30 is in contact with the support 40 through the insulating layers 30a and 30b, and the electrode 32a is formed on the upper surface of the piezoelectric body 31.
  • An insulating layer is disposed between the pressing means 35 and the elastic body 33.
  • the piezoelectric body 31 was configured as a rectangular parallelepiped having a dimension of approximately 1 cm x 0.5 cm x 0.1 mm as a whole, and the diameter of the bottom face of the spring 33 was approximately 0.6 cm. Referring to FIG. 7B, it is the same as the electric energy generating device shown in FIG. 7A, except that the elastic body 33 is not provided. That is, the metal plate 31 is supported by the support 40, and the piezoelectric element 31 and the pressing means 35 are disposed on the metal plate 31.
  • FIG. 8 is a graph of voltage over time showing experimental results of the electric energy generating apparatus shown in FIGS. 7A and 7B.
  • the voltage generated in the electric energy generating device with the elastic body 33 is indicated at the top of FIG. 8, while the voltage generated in the electric energy generating device without the elastic body 33 is shown in the lower part of FIG. 8. It is.
  • the elastic member 33 when the elastic member 33 is provided, a voltage having an absolute value of at least 3 volts is generated as the pressing means 35 is pressed, and the voltage is applied when a force for pressing the spring is applied. And one time in the form of free vibration once the pressing force is removed. In contrast, in the absence of the elastic body 33, the magnitude of the absolute value of the voltage is less than 0.5 volts.
  • the wavy shape of about 0.2-0.3 volts at 60 Hz is a signal coming out as background noise due to the microscopic vibration naturally occurring when the power is applied to the experimental device, and has no relation to the signal coming out from the pressing device.
  • FIG. 10 is a result of measuring voltage generation by repeatedly pressing the home button in the experimental apparatus of FIGS. 9A and 9B, and it can be seen that a voltage of about 8V is consistently generated even after 100 times and 1000 times.
  • Examples of the elastic body having elastic properties according to the present invention include, but are not limited to, a buckling spring, a snap-through-buckling spring, a disk spring, a dome spring, and the like.
  • a snap dome can be used as the elastic body.
  • Snapdom is generally used as an ultra-thin push switch (see http://www.inovan.de/, http://www.snaptron.com/), one example of which is shown in FIG.
  • the edges touch the floor but the middle part is slightly floating, so if you press the middle part, before the center part touches the floor, the pressing force of the center is suddenly transmitted to the edge and it turns off completely. Snap-through-buckling.
  • FIG. 12 is a schematic representation of the shape of the snapdom cross section in which deformation occurs when a pressing force is applied. If you measure strain while increasing the force, you can see that the strain suddenly jumps at the same force when you go to the area where snap-through-buckling occurs.
  • the unit elastic bodies are stacked such that displacement of each unit elastic body sequentially causes displacement of adjacent unit elastic bodies.
  • FIG. 13 shows a stack of snapdom stacks stacked upside down in the opposite direction.
  • the first snap dome is first placed, the second snap dome is inverted in the opposite direction to the first snap dome, stacked on the first snap dome, and the third snap dome is inverted in the opposite direction to the second snap dome, ie, the first snap dome. Stacked on the second snap dome in the same direction as the dome.
  • adjacent snapdoms may be repeatedly stacked in an opposite direction to form a stack of N snapdoms. This places the top of one snap dome and the top of the other slab in contact with each other and the opposite side, i.e., the bottom, with the bottom of the next (other) snap dome, as shown in FIG. And are repeatedly arranged to face each other in opposite directions.
  • more electrical energy can be generated by providing protrusions that can cause twisting of the piezoelectric body selectively between the space or the piezoelectric body and the elastic body.
  • the piezoelectric body may be made of a piezoelectric single crystal or a piezoelectric material.
  • it may be made of a piezoelectric single crystal or piezoceramic, or a piezoelectric polymer containing or not containing lead.
  • Piezoelectric single crystals have a structure in which fine particles having a predetermined structure are regularly arranged.
  • the piezoelectric body may have a piezoelectric characteristic of d33, d15, or d31 mode.
  • the piezoelectric single crystal may be a solid solution single crystal of magnesium niobate (PMN), which is a relaxor, and lead titanate (PT), which is a piezoelectric body.
  • PMN magnesium niobate
  • PT lead titanate
  • the piezoelectric distortion is three times or more, compared with the conventional piezoelectric material, the electromechanical coupling coefficient is large, and excellent piezoelectric properties are exhibited.
  • piezoelectric ceramics such as lead zirconate titanate (PZT) ceramics, which are examples of known piezoelectric materials, can be used.
  • the snap dome stack acts like a spring, initially pushing the outer push switch, and pressing the push switch with an external force causes the snap dome stack to contract. When the pressing force is removed again, it is returned to the original state by the elastic restoring force of each snap dome.
  • FIG. 16 shows a method for measuring power generation when snap-through-buckling of the snap dome stack shown in FIG. 15 is actually applied.
  • Power generated in the piezoelectric body may be stored in the capacitor via a rectifier circuit or directly connected to a rechargeable battery instead of the capacitor.
  • Figure 17 shows the actual fabrication process for actually testing the performance of the snap dome stack.
  • A, B, C, D is a frame manufacturing drawing for installing a snap dome stack
  • A is the upper frame
  • B is the pressing portion
  • C is the bottom frame
  • D represents the bottom frame.
  • the upper frame (A) is to hold the movement path of the pressing portion when the pressing portion presses the snap dome stack and secures a space in which the pressing portion moves.
  • Pressing portion (B) is a pressing portion by pressing the snap dome stack is in contact with the upper portion. When pressed, it moves down and directly pushes the snap dome stack.
  • the lower frame C has an inner space according to the shape of the snapdom stack so that it can be stably pressed when the snapdom stack is pressed.
  • the bottom frame D is a position where the piezoelectric material to which the piezoelectric material is attached is located, and has a little space at the bottom so that the piezoelectric material can be lowered slightly when pressed.
  • E is actually a snap dome stack frame.
  • F shows the shape when the snapdom stack removed from E is assembled.
  • G represents the piezoelectric body mounted under the snapdom stack.
  • H shows the snap dome stack mounted inside the frame.
  • 18A and 18B correspond to the operation test of the piezoelectric generator manufactured as in FIG. 17 before and after pressing of FIG. 15, respectively.
  • 19 schematically shows the results of a push experiment according to the number of snap domes of a snap dome stack. Pressed at 2 mm / s and stopped at 1500 gram-force, changing the number of snapdoms to 1, 3, 5, 7, and 9 shows the depth of force-force change graph for each structure.
  • 20 is a graph showing the energy generation form of the piezoelectric generator according to one embodiment of the present invention (number of snap domes).
  • the wires electrically connected to both sides of the piezoelectric generator are connected to the capacitor through the bridge diode rectifier circuit, and the voltage applied to the capacitor is measured and calculated as stored energy.
  • the force of the low frequency applied to the piezoelectric body can generate much more electric energy than before.
  • the electrical energy generating device can be applied in various ways. For example, it may be used as a non-powered remote controller, a non-powered keyboard, a non-powered door lock, or a personal keypad.
  • a non-powered remote controller even if a separate battery is not provided, electric energy is generated only by a user pressing a button on the remote controller, and an infrared signal may be generated using the electric energy.
  • the user may generate electrical energy only by typing on the keyboard, and transmit the keyboard signal to the computer body using the electrical energy.
  • a sufficient electrical energy can be obtained by adopting a new structure that can generate a lot more electrical energy than the existing by converting a low frequency force applied to the piezoelectric material to a high frequency. It can be used to power sensor nodes in a wireless sensor network or Internet of Things (IoT) of growing interest. Alternatively, it is applied to a shoe or insole that generates electricity while walking, and may be used immediately after being temporarily stored in a battery or as a power source for driving a smart shoe or a smart insole.
  • IoT Internet of Things

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Abstract

La présente invention concerne un appareil de génération d'énergie électrique comprenant : un corps piézoélectrique présentant au moins deux surfaces ; et un corps élastique qui est placé sur au moins une des surfaces du corps piézoélectrique et permet au corps piézo-électrique de se déplacer. Si une force extérieure est appliquée au corps élastique et si le corps élastique est comprimé dans une direction et déformé, la force du corps élastique qui comprime le corps piézoélectrique est convertie en vibrations dans lesquelles la force de pression augmente et diminue à répétition, et le déplacement de vibration est transmis au corps piézo-électrique. L'appareil selon la présente invention convertit la force d'une basse fréquence de vibration appliquée au corps piézoélectrique en une haute fréquence de vibration par un principe simple, générant ainsi beaucoup plus d'énergie électrique que les appareils existants.
PCT/KR2016/000235 2015-01-09 2016-01-11 Appareil de génération d'énergie électrique WO2016111601A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020150003159A KR101659283B1 (ko) 2015-01-09 2015-01-09 전기 에너지 발생 장치
KR10-2015-0003159 2015-01-09
KR10-2015-0101215 2015-07-16
KR1020150101215A KR101712817B1 (ko) 2015-07-16 2015-07-16 전기 에너지 발생 장치

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150256107A1 (en) * 2012-09-25 2015-09-10 Sang-Cheol Bae Piezoelectric element for power generation and power generation device using same
CN112181178A (zh) * 2020-10-04 2021-01-05 长春工业大学 一种拥有自供能系统的无线鼠标装置

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