WO2014021529A1 - Système de récupération piézoélectrique - Google Patents

Système de récupération piézoélectrique Download PDF

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Publication number
WO2014021529A1
WO2014021529A1 PCT/KR2013/001043 KR2013001043W WO2014021529A1 WO 2014021529 A1 WO2014021529 A1 WO 2014021529A1 KR 2013001043 W KR2013001043 W KR 2013001043W WO 2014021529 A1 WO2014021529 A1 WO 2014021529A1
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WO
WIPO (PCT)
Prior art keywords
metal plate
piezoelectric
harvesting system
free end
shape
Prior art date
Application number
PCT/KR2013/001043
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English (en)
Korean (ko)
Inventor
성태현
히다까신이치
정현준
송준후
Original Assignee
(주)시드에너텍
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Publication date
Application filed by (주)시드에너텍 filed Critical (주)시드에너텍
Publication of WO2014021529A1 publication Critical patent/WO2014021529A1/fr

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors
    • H10N30/304—Beam type
    • H10N30/306—Cantilevers
    • 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

  • a piezoelectric harvesting system is disclosed. More specifically, even when the concentrated load is applied by striking the metal plate, the concentrated load can be evenly distributed by the shape of the metal plate or the piezoelectric body, and thus, a uniform force can be applied to the piezoelectric body attached to the metal plate.
  • a piezoelectric harvesting system is disclosed that can increase the generation efficiency.
  • piezoelectric energy harvesting which can be used as renewable energy at relatively fine energy among recent renewable energy, has been studied, and much attention has been drawn to industrialization.
  • piezoelectric energy harvesting electric energy may be generated using a force applied to a piezoelectric material.
  • An object according to an embodiment of the present invention is that even when the concentrated load is applied by hitting the metal plate, the concentrated load can be evenly distributed by the shape of the metal plate or the piezoelectric body, and thus a uniform force can be applied to the piezoelectric body attached to the metal plate. It is possible to provide a piezoelectric harvesting system that can increase the generation efficiency of electrical energy.
  • Another object according to an embodiment of the present invention it is possible to prevent the concentrated load is generated in the metal plate to prevent deformation or breakage in the metal plate, it is possible to prevent the concentrated load relatively compared to the conventional To provide a piezoelectric harvesting system that can be hit by a large force to increase the amount of electrical energy generated.
  • another object according to an embodiment of the present invention is to provide a piezoelectric harvesting system that can reduce the size of the piezoelectric material or the metal plate while maintaining the size of the power generation amount, which can realize the weight and cost.
  • a piezoelectric harvesting system a piezoelectric material made of a piezoelectric material; And a metal plate on which the piezoelectric body is mounted, and one side of which is fixed by a fixing unit, wherein at least one of the piezoelectric body and the metal plate is thinner as it moves away from a portion fixed by the fixing unit.
  • the metal plate is provided in a cantilever type that one side is coupled to the fixing portion, the metal plate may have a shape that is reduced in thickness toward the free end direction from the fixed end fixed to the fixing portion.
  • the upper surface of the metal plate is formed horizontally and the lower surface of the metal plate may be provided to be inclined upward toward the free end direction.
  • the impact point is located at the free end of the metal plate, the thickness of the free end may be formed relatively thicker than the thickness of the metal plate connected to the free end.
  • the piezoelectric body may have a shape in which the thickness decreases away from the fixed portion to which the metal plate is coupled.
  • the piezoelectric material is made of a ceramic (ceramic) material, a polymer (polymer) material or a ceramic, a combination material of the polymer, the metal plate may be made of stainless steel (stainless steel) material.
  • the concentrated load can be evenly distributed by the shape of the metal plate or the piezoelectric body, and thus a uniform force can be applied to the piezoelectric body attached to the metal plate.
  • the generation efficiency of electric energy can be increased.
  • the concentrated load is generated in the metal plate to prevent deformation or breakage in the metal plate, and by preventing the concentrated load with a relatively large force compared to the conventional The impact can be increased to increase the amount of electrical energy generated.
  • the size of the piezoelectric material or the metal plate can be reduced while maintaining the size of the power generation amount, it is possible to implement the weight reduction and the cost reduction.
  • FIG. 1 is a schematic perspective view of a piezoelectric harvesting system according to an embodiment of the present invention.
  • FIG. 2 is a view of the piezoelectric harvesting system of FIG.
  • FIG. 3 is a schematic perspective view of a piezoelectric harvesting system according to another embodiment of the present invention.
  • FIG. 4 is a view of the piezoelectric harvesting system of FIG.
  • FIG. 5 is a schematic perspective view of a piezoelectric harvesting system according to another embodiment of the present invention.
  • FIG. 6 is a view of the piezoelectric harvesting system of FIG.
  • FIG. 1 is a schematic perspective view of a piezoelectric harvesting system according to an embodiment of the present invention
  • Figure 2 is a view of the piezoelectric harvesting system of Figure 1 from one side.
  • the piezoelectric harvesting system 100 of the present embodiment includes a piezoelectric body 120 made of a piezoelectric material and a metal on which one side of the piezoelectric body 120 is mounted and fixed to the fixing part 130.
  • Plate 110 may be included.
  • the metal plate 110 has a shape that becomes thinner from the fixed end 111 fixed to the fixing part 130 toward the free end 115 so that the external force is uniformly applied when the external force is applied to the system 100. May be applied to the piezoelectric body 20.
  • the piezoelectric body 120 of the present embodiment has a rectangular plate shape, as shown in FIGS. 1 and 2, and is attached to the upper surface of the metal plate 110.
  • the piezoelectric body 120 strikes the hitting point P1 positioned on one side of the metal plate 110, the piezoelectric body 120 also vibrates by vertical vibration of the metal plate 110, thereby generating electrical energy. can do.
  • the piezoelectric body 120 of the present embodiment may be a hybrid piezoelectric element in which a polymer or a polymer and a ceramic are mixed because of excellent physical flexibility, including a ceramic piezoelectric element having a high power generation. Therefore, it is durable due to its excellent physical flexibility and is therefore easy to develop.
  • PVDF is basic, and may include barium titanate, PZT crystal, or PZT fiber.
  • Lead-free piezoelectric materials such as NKN, BZT-BCT, BNT, BSNN, BNBN, PLZT, P (VDF-TrFE), quartz, tourmaline, Rochelle salt, barium titanate, dihydrogen phosphate Ammonium, ethylene tartarate, etc. can be used.
  • the type and material of the piezoelectric material 120 are not limited thereto, and it is natural that other materials may be used if sufficient power generation amount can be generated by external force.
  • the metal plate 110 of the present embodiment has a structure in which the piezoelectric body 120 is mounted on an upper surface thereof and one side thereof is fixed to the fixing part 130. That is, when an external force is applied to a portion that is not fixed by having a cantilever structure, that is, the free end 115, the free end 115 vibrates up and down based on the fixed end 111 to provide the vibration to the piezoelectric body 120. can do.
  • the metal plate 110 is made of a material having durability such as stainless steel, cracking or bending may be minimized even when repeatedly applied to the metal plate 110.
  • the material of the metal plate 110 is not limited thereto.
  • the conventional metal plate generally has a flat shape
  • the concentrated load is applied and the moment force increases as the distance from the impact point increases, so that not only the deformed portion but also the developing portion is localized.
  • damage to the piezoelectric body could occur because deformation occurred at the localized portion.
  • the thickness becomes thinner toward the free end 115 from the fixed end 111 fixed to the fixing part 130. It has a shape. That is, the upper surface to which the piezoelectric body 120 is attached is horizontally finished, but the lower surface thereof is inclined upwardly in the direction of the free end 115 so that the shape of the metal plate 110 may be thinner toward the free end direction.
  • the force is not generated, but rather, the electric force of the metal plate 110 to which the piezoelectric body 120 is attached.
  • the moment force is uniformly distributed over the region so that a uniform force is applied to the entire surface of the piezoelectric body 120, thereby increasing power generation.
  • the metal plate 110 of the present embodiment as shown in Figure 1, the portion of the free end 115, where the striking point (P1) is located has a relatively thick thickness than other adjacent parts. More specifically, the metal plate 110 has a thickness that is thinner from the fixed end 111 toward the free end 115, but the overall thickness thereof is increased. This is to reinforce the durability of the metal plate 10 by reinforcing the portion of the free end 115 where the impact point P1 hit by the external force is located.
  • the concentrated load may be evenly distributed by the shape of the metal plate 110, and thus, the metal plate 110 may be distributed.
  • Uniform force may be applied to the attached piezoelectric body 120 to increase generation efficiency of electrical energy.
  • the size of the piezoelectric body 120 or the metal plate 110 can be reduced while maintaining the size of power generation, there is an advantage that weight and cost can be realized.
  • Figure 3 is a schematic perspective view of a piezoelectric harvesting system according to another embodiment of the present invention
  • Figure 4 is a view of the piezoelectric harvesting system of Figure 3 from one side.
  • the piezoelectric harvesting system 200 according to another embodiment of the present invention, the piezoelectric body 220, the piezoelectric material 220 is attached to the cantilever type fixed to the fixing portion 230 Including the plate 210, there is a difference in the shape of the piezoelectric member 220 and the metal plate 210 and the piezoelectric harvesting system 100 of the above-described embodiment (see FIG. 1).
  • the piezoelectric member 220 of the present embodiment has a shape in which the thickness thereof becomes thinner as the distance from the fixing part 230 with respect to the fixing part 230, and the metal plate 210.
  • the moment force acting on the metal plate 210 may increase as the distance from the hitting point P2 increases, but the thickness of the piezoelectric member 220 is increased.
  • Moment force applied to the piezoelectric member 220 may be uniformly actuated by becoming thicker as it moves away from the impact point P2, thereby increasing the amount of generation of electrical energy generated by the vibration of the piezoelectric member 220.
  • the concentrated load can be evenly distributed by the shape of the piezoelectric body 220, and thus a uniform force can be applied to the piezoelectric body 220.
  • Figure 5 is a schematic perspective view of a piezoelectric harvesting system according to another embodiment of the present invention
  • Figure 6 is a view of the piezoelectric harvesting system of Figure 5 from one side.
  • the piezoelectric harvesting system 300 has a thinner thickness as both the piezoelectric body 320 and the metal plate 310 move away from the fixing part 330. Losing shape.
  • a moment force may be uniformly applied to the metal plate 310, and the piezoelectric body 320 may also be applied. Also uniform force can be applied to increase the generation efficiency of electrical energy.

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  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

L'invention concerne un système de récupération piézoélectrique qui comporte, selon un aspect de la présente invention : un élément piézoélectrique constitué d'un matériau piézoélectrique ; une plaque de métal munie de l'élément piézoélectrique et fixée sur un côté par un élément de fixation. Au moins l'un ou l'autre de l'élément piézoélectrique et de la plaque de métal peut avoir une forme dont l'épaisseur diminue à mesure que la distance de la partie, qui est fixée par l'élément de fixation, augmente. Selon un aspect de la présente invention, une charge concentrée peut être dispersée de manière uniforme par la forme de la plaque de métal ou de l'élément piézoélectrique même si la charge concentrée est appliquée en frappant la plaque de métal. Ainsi, une force uniforme peut être appliquée à l'élément piézoélectrique fixé à la plaque de métal de telle sorte que l'efficacité de la génération d'énergie électrique peut être améliorée.
PCT/KR2013/001043 2012-07-31 2013-02-08 Système de récupération piézoélectrique WO2014021529A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2012-0083990 2012-07-31
KR1020120083990A KR101366066B1 (ko) 2012-07-31 2012-07-31 압전 하베스팅 시스템

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WO2014021529A1 true WO2014021529A1 (fr) 2014-02-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160079885A1 (en) * 2014-09-11 2016-03-17 Electronics And Telecommunications Research Institute Energy harvesting device, method for manufacturing the same, and wireless device including the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102542155B1 (ko) * 2020-12-22 2023-06-12 배상철 타전소자 및 이를 이용하는 타전 발전장치
CN113315415A (zh) * 2021-05-28 2021-08-27 上海应用技术大学 一种基于激光面减薄的阶梯式压电能量采集器及制备方法

Citations (5)

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Publication number Priority date Publication date Assignee Title
KR100318860B1 (ko) * 1998-09-10 2002-03-21 김춘호 초음파모터
US6382026B1 (en) * 1998-05-19 2002-05-07 Matsushita Electric Industrial Co., Ltd. Acceleration sensor and acceleration apparatus using acceleration sensor
KR100929552B1 (ko) * 2007-12-28 2009-12-03 한국과학기술연구원 [110] 방향으로 분극된 완화형 강유전체 단결정을 이용한에너지 하베스터
US20110109202A1 (en) * 2008-07-17 2011-05-12 Jean-Frederic Martin Autonomous piezoelectric device for generating an electrical voltage
KR20120059363A (ko) * 2010-11-30 2012-06-08 세이코 엡슨 가부시키가이샤 압전진동편, 압전모듈 및 전자디바이스

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6382026B1 (en) * 1998-05-19 2002-05-07 Matsushita Electric Industrial Co., Ltd. Acceleration sensor and acceleration apparatus using acceleration sensor
KR100318860B1 (ko) * 1998-09-10 2002-03-21 김춘호 초음파모터
KR100929552B1 (ko) * 2007-12-28 2009-12-03 한국과학기술연구원 [110] 방향으로 분극된 완화형 강유전체 단결정을 이용한에너지 하베스터
US20110109202A1 (en) * 2008-07-17 2011-05-12 Jean-Frederic Martin Autonomous piezoelectric device for generating an electrical voltage
KR20120059363A (ko) * 2010-11-30 2012-06-08 세이코 엡슨 가부시키가이샤 압전진동편, 압전모듈 및 전자디바이스

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160079885A1 (en) * 2014-09-11 2016-03-17 Electronics And Telecommunications Research Institute Energy harvesting device, method for manufacturing the same, and wireless device including the same
US9647579B2 (en) * 2014-09-11 2017-05-09 Electronics And Telecommunications Research Institute Energy harvesting device, method for manufacturing the same, and wireless device including the same

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KR20140016742A (ko) 2014-02-10
KR101366066B1 (ko) 2014-02-25

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