WO2013069516A1 - 圧電発電素子 - Google Patents
圧電発電素子 Download PDFInfo
- Publication number
- WO2013069516A1 WO2013069516A1 PCT/JP2012/078129 JP2012078129W WO2013069516A1 WO 2013069516 A1 WO2013069516 A1 WO 2013069516A1 JP 2012078129 W JP2012078129 W JP 2012078129W WO 2013069516 A1 WO2013069516 A1 WO 2013069516A1
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- WIPO (PCT)
- Prior art keywords
- piezoelectric
- lever
- piezoelectric power
- power generation
- stopper
- Prior art date
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- 238000010248 power generation Methods 0.000 title claims abstract description 43
- 238000006073 displacement reaction Methods 0.000 claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Classifications
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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 a piezoelectric power generation element including a piezoelectric element.
- a piezoelectric power generation element including a piezoelectric element is known as a small power generation element (see, for example, Patent Document 1). Since the piezoelectric power generating element includes a piezoelectric element and a member that applies stress to the piezoelectric element when an external force such as vibration is applied, the structure can be simplified and the size can be reduced. For this reason, for example, application to a wide range of uses such as a power source of a tire pressure monitoring system (Tire Pressure Monitoring System: TPMS) mounted inside a tire is expected.
- TPMS Tire Pressure Monitoring System
- the main object of the present invention is to provide a small piezoelectric power generation element.
- the first piezoelectric power generating element includes a piezoelectric element, a stopper, and a lever.
- the piezoelectric element has a first surface and a second surface. The first surface is located on one side in the first direction. The second surface is located on the other side in the first direction. The second surface is opposed to the first surface.
- the stopper has a first contact surface. The first contact surface is in contact with the first surface.
- the lever has a contact portion and a displacement portion. The contact portion includes a second contact surface. The second contact surface is in contact with the second surface. The displacement portion is disposed on one side in the first direction with respect to the second surface.
- the lever is provided so as to be rotatable relative to the stopper about a rotation axis extending in a second direction perpendicular to the first direction.
- a lever is provided so that the second contact surface presses the second surface when the displacement portion rotates relative to the stopper about the rotation axis.
- the lever is rotatably supported by a stopper.
- the shortest distance between the contact portion and the rotation shaft is shorter than the shortest distance between the displacement portion and the rotation shaft.
- the piezoelectric power generating element further includes a biasing member.
- the biasing member biases the lever in a direction opposite to the rotation direction when the lever rotates relative to the stopper.
- the biasing member biases the displacement portion.
- the piezoelectric power generation element further includes a drive mechanism that rotates the lever a plurality of times around the rotation axis.
- the second piezoelectric power generating element according to the present invention includes a piezoelectric body and a stress applying member.
- the stress applying member applies stress to the piezoelectric body.
- the second piezoelectric power generating element according to the present invention further includes a drive mechanism.
- the drive mechanism drives the stress applying member so that the stress applying member applies stress to the piezoelectric body a plurality of times when an external force is applied to the piezoelectric power generation element.
- a small piezoelectric power generation element can be provided.
- FIG. 1 is a schematic perspective view of a piezoelectric power generating element according to a first embodiment of the present invention.
- FIG. 2 is a schematic plan view of the piezoelectric power generating element according to the first embodiment of the present invention.
- FIG. 3 is a schematic side view of the piezoelectric power generating element according to the first embodiment of the present invention.
- FIG. 4 is a schematic front view of the piezoelectric power generating element according to the first embodiment of the present invention.
- FIG. 5 is a schematic perspective view of a piezoelectric power generating element according to the second embodiment of the present invention.
- FIG. 6 is a schematic side view of a piezoelectric power generating element according to the second embodiment of the present invention.
- FIG. 1 is a schematic perspective view of a piezoelectric power generating element according to a first embodiment of the present invention.
- FIG. 2 is a schematic plan view of the piezoelectric power generating element according to the first embodiment of the present invention.
- FIG. 7 is a schematic side view of a piezoelectric power generating element according to the third embodiment of the present invention.
- FIG. 8 is a schematic perspective view of a piezoelectric power generating element according to the third embodiment of the present invention.
- FIG. 9 is a schematic exploded perspective view of a piezoelectric power generating element according to the third embodiment of the present invention.
- FIG. 10 is a schematic perspective view of a piezoelectric power generating element according to a modification of the third embodiment of the present invention.
- FIG. 11 is a schematic exploded perspective view of a piezoelectric power generating element according to a modification of the third embodiment of the present invention.
- FIG. 1 is a schematic perspective view of a piezoelectric power generating element 1 according to a first embodiment of the present invention.
- FIG. 2 is a schematic plan view of the piezoelectric power generating element 1 according to the first embodiment of the present invention.
- FIG. 3 is a schematic side view of the piezoelectric power generating element 1 according to the first embodiment of the present invention.
- FIG. 4 is a schematic front view of the piezoelectric power generating element 1 according to the first embodiment of the present invention.
- xyz axis of an orthogonal coordinate system including an x axis, a y axis orthogonal to the x axis, and a z axis orthogonal to the x axis and the y axis.
- the x-axis direction is the first direction
- the y-axis direction is the second direction
- the z-axis direction is the third direction.
- the piezoelectric power generation element 1 includes a piezoelectric element 10, a stopper 20, and a lever 30.
- the piezoelectric element 10 has a piezoelectric body and an electrode.
- the piezoelectric body can be made of, for example, lead zirconate titanate (PZT).
- the electrodes may be arranged in any way as long as the electric power generated in the piezoelectric body can be taken out.
- the electrodes may be, for example, a pair and may be arranged so as to sandwich the piezoelectric body. Each of the pair of electrodes may be composed of a plurality of electrodes.
- the piezoelectric element 10 has a columnar shape. More specifically, the piezoelectric element 10 has a quadrangular prism shape.
- the piezoelectric element 10 has a first surface 10a and a second surface 10b.
- the first surface 10a and the second surface 10b face each other in the x-axis direction.
- the first surface 10a is located on the x1 side in the x-axis direction.
- the second surface 10b is located on the x2 side in the x-axis direction.
- the piezoelectric element 10 may be configured by a stacked piezoelectric body formed by stacking a plurality of piezoelectric layers and a plurality of internal electrodes.
- the piezoelectric element 10 should just have two surfaces which oppose, and other shapes, such as flat form, may be sufficient instead of column shape.
- the stopper 20 includes a contact portion 21, a support portion 22, a connection portion 23, and a shaft 24.
- the contact portion 21 is disposed on the x1 side in the x-axis direction of the first surface 10a.
- the contact portion 21 has a first contact surface 21a.
- the first contact surface 21a is opposed to the first surface 10a, and is in contact with the first surface 10a.
- the support portion 22 is disposed on the x2 side in the x-axis direction of the second surface 10b.
- the support part 22 is connected to the contact part 21 by a connection part 23.
- the connecting portion 23 is disposed on the z2 side of the piezoelectric element 10 in the z-axis direction.
- the support portion 22 is provided with a shaft 24 extending along the y-axis direction.
- the lever 24 is supported by the shaft 24 so as to be rotatable about the shaft 24. Therefore, the lever 30 is rotatable relative to the stopper 20 about a rotation axis extending in the y-axis direction, which is a second direction perpendicular to the x-axis direction, which is the first direction.
- the lever 30 has a contact part 31, a displacement part 32, and a connection part 33.
- the contact portion 31 is disposed on the x2 side in the x-axis direction of the second surface 10b.
- the contact portion 31 is disposed inside the stopper 20 in the y-axis direction.
- the contact portion 31 has a second contact surface 31a.
- the second contact surface 31a is opposed to the second surface 10b and is in contact with the second surface 10b.
- the displacement part 32 is arrange
- the displacement part 32 is arrange
- the displacement part 32 is connected to the contact part 31 by the connection part 33.
- the connecting portion 33 is disposed on the z2 side of the piezoelectric element 10 in the z-axis direction.
- the piezoelectric power generation element 1 when an operator operates the lever 30 or when vibration or an external force is applied to the piezoelectric power generation element 1, a force toward the z2 side in the z-axis direction is applied to the displacement portion 32 of the lever 30.
- the lever 30 rotates relative to the stopper 20 around the rotation axis (the central axis of the shaft 24)
- the second contact surface 31a of the contact portion 31 is also centered on the rotation axis along with the rotation. Rotate as For this reason, the second contact surface 31a of the contact portion 31 presses the second surface 10b of the piezoelectric element 10 toward the x1 side in the x-axis direction.
- the second contact surface 31a presses the second surface 10b toward the x1 side in the x-axis direction and toward the z2 side in the z-axis direction. For this reason, stress is applied to the piezoelectric element 10. As a result, electric power is generated in the piezoelectric element 10 due to the piezoelectric effect.
- the piezoelectric generating element 1 is provided with a biasing member 40 (see FIG. 3).
- a biasing member 40 see FIG. 3
- the lever 30 rotates relative to the stopper 20 so that the second contact surface 31a presses the second surface 10b toward the x1 side in the x-axis direction
- the lever 30, specifically, the displacement portion 32 of the lever 30 is biased in the direction opposite to the rotation direction of the lever 30.
- the biasing member 40 assists the rotated lever 30 to return to the original position.
- the urging member 40 can be constituted by a spring or the like, for example.
- the displacement portion 32 of the lever 30 is located on the x1 side (first surface 10a side) in the x-axis direction from the second surface 10b.
- the connecting portion 33 of the lever 30 is disposed on the z2 side of the piezoelectric element 10 in the z-axis direction. Therefore, in the piezoelectric power generation element 1, at least a portion of the lever 30 overlaps the position of the piezoelectric element 10 in the x-axis direction. Therefore, in the piezoelectric power generating element 1, the dimension in the x-axis direction (first direction) can be reduced.
- the shaft 24 is provided so that the shortest distance between the contact portion 31 and the rotation shaft is shorter than the shortest distance between the displacement portion 32 and the rotation shaft. For this reason, the pressing force with respect to the piezoelectric element 10 of the 2nd contact surface 31a becomes large by the lever principle. Therefore, the piezoelectric power generating element 1 can be further reduced in size and increased in power generation efficiency.
- the lever 30 is rotatably supported by the stopper 20. For this reason, it is not necessary to provide the member which supports the lever 30 separately from the stopper 20. Therefore, the piezoelectric power generating element 1 can be further reduced in size.
- the lever 30 can swing a plurality of times when stress is applied to the displacement portion 32 of the lever 30 toward the z2 side in the z-axis direction. Further, the biasing member 40 shortens the time required for the lever 30 to return to the original position. Therefore, it is possible to increase the power generation amount of the piezoelectric power generation element 1.
- the urging member 40 is disposed so as to urge the displacement portion 32 located at a position away from the rotation axis, and thus the time required for the lever 30 to return to the original position. Is even shorter. Therefore, the power generation amount of the piezoelectric power generation element 1 can be further increased.
- FIG. 5 is a schematic perspective view of the piezoelectric power generating element 2 according to the second embodiment of the present invention.
- FIG. 6 is a schematic side view of the piezoelectric power generating element 2 according to the second embodiment of the present invention.
- the piezoelectric power generating element 2 according to the second embodiment of the present invention is different from the piezoelectric power generating element 1 according to the first embodiment in that it includes a slide member 50 as a drive mechanism.
- the slide member 50 rotates the lever 30 about the rotation axis when a stress along the x-axis direction, which is the first direction, is applied to the piezoelectric power generating element 2.
- the slide member 50 is provided so as to be displaceable in the x-axis direction, which is the first direction, with respect to the stopper 20 and the lever 30.
- the slide member 50 is disposed on the z1 side in the z-axis direction with respect to the stopper 20 and the lever 30.
- the slide member 50 has a plurality of convex portions 50a that protrude to the z2 side in the z-axis direction.
- the plurality of convex portions 50a are provided so as to overlap the rod-shaped member 32a provided in the displacement portion 32 in the x-axis direction.
- the rod-shaped member 32a is provided so as to extend along the y-axis direction.
- Each of the plurality of convex portions 50a has a pair of inclined surfaces 50a1 and 50a2 that are inclined with respect to the x-axis direction.
- the inclination angle of the inclined surface 50a1 with respect to the x-axis direction (the displacement direction of the slide member 50) and the inclination angle of the inclined surface 50a2 with respect to the x-axis direction may be the same or different.
- the inclination angle of the inclined surface 50a2 with respect to the x-axis direction may be larger than the inclination angle of the inclination angle 50a1 with respect to the x-axis direction.
- each of the inclined surfaces 50a1 and 50a2 is planar, but may be curved.
- the cross-sectional shape of the outline of the slide member 50 having a plurality of convex portions 50a may have a wavy portion at least partially constituted by a curve, such as a sine curve.
- the lever 30 as a stress applying member applies stress to the piezoelectric element 10 a plurality of times when an external force is applied to the piezoelectric power generation element 2 once.
- a slide member 50 is provided as a drive mechanism for driving the motor. In the piezoelectric power generation element 2, when vibration or external force along the x-axis direction is applied to the piezoelectric power generation element 2, the slide member 50 is displaced relative to the stopper 20 and the lever 30 in the x-axis direction.
- the rod-shaped member 32a is pressed to the z2 side by the convex portion 50a.
- the plurality of convex portions 50a may cross the rod-shaped member 32a in the x-axis direction, and the plurality of convex portions 50a cause the rod-shaped member 32a to be pressed multiple times toward the z2 side. Is done. Therefore, the lever 30 is operated a plurality of times while the slide member 50 is displaced once along the x-axis direction.
- the piezoelectric power generation element 2 even if the magnitude of the stress applied to the piezoelectric element 10 by one rotation of the lever 30 is small, a plurality of stresses are applied to the piezoelectric element 10 by rotating the lever 30 multiple times by the slide member 50. As a result, the total amount of power generation is obtained. Therefore, a large amount of power generation can be obtained without applying a large stress to the piezoelectric element 10 at once.
- an elastic member 51 configured by a spring or the like is connected to the slide member 50, the number of times the slide member 50 is displaced in the x-axis direction when stress is applied to the slide member 50 increases. Therefore, it is possible to realize excellent power generation efficiency and a larger power generation amount.
- piezoelectric power generation element 2 electric power is generated not only when vibration or external force along the z-axis direction is applied but also when vibration or external force is applied along the x-axis direction.
- FIG. 7 is a schematic side view of the piezoelectric power generating element 3 according to the third embodiment of the present invention.
- FIG. 8 is a schematic perspective view of the piezoelectric power generating element 3 according to the third embodiment of the present invention.
- FIG. 9 is a schematic exploded perspective view of the piezoelectric power generating element 3 according to the third embodiment of the present invention.
- the lever 30 is directly connected to the stopper 20. That is, the stopper 20 and the lever 30 are integrally formed.
- a shaft 63 is provided in the displacement portion 32.
- a cam 61 is rotatably attached to the stopper 20.
- the cam 61 is non-circular in plan view. Specifically, the cam 61 has a substantially polygonal shape in plan view, more specifically, a substantially rectangular shape. The outer peripheral surface of the cam 61 and the outer peripheral surface of the shaft 63 are in contact with each other.
- a shaft 62 is fixed to the center of the cam 61 so as not to rotate.
- a gear is provided on the outer peripheral surface of the shaft 62.
- a slide member 50 as a drive mechanism is disposed on one side of the shaft 62 in the z-axis direction.
- the slide member 50 has a plurality of convex portions 50a projecting to one side in the z-axis direction, and is provided so as to be displaceable in the x-axis direction.
- the plurality of convex portions 50 a are formed so as to mesh with a gear provided on the outer peripheral surface of the shaft 62.
- the cam 61 In the piezoelectric power generation element 3, when the slide member 50 is displaced along the x-axis direction, the cam 61 also rotates together with the shaft 62.
- the shaft 63 swings along the z-axis direction as the cam 61 rotates. Accordingly, the lever 30 to which the shaft 63 is fixed rotates about the rotation axis C located in the vicinity of the connection portion between the stopper 20 and the lever 30, and the second contact surface 31a of the contact portion 31 is piezoelectric.
- the second surface 10b of the element 10 is pressed toward the x1 side in the x-axis direction. For this reason, stress is applied to the piezoelectric element 10. As a result, electric power is generated in the piezoelectric element 10 due to the piezoelectric effect.
- the piezoelectric power generating element 3 generates electric power even when linear vibration or external force is applied along the x-axis direction. Further, once the slide member 50 is displaced along the x-axis direction, the lever 30 is continuously swung a plurality of times, so that electric power can be continuously generated.
- the example in which the slide member 50 is provided with the plurality of convex portions 50a and the gear 62 is provided on the outer peripheral surface of the shaft 62 has been described, but these are not necessarily essential.
- the cam 61 may be rotated by a frictional force generated between the slide member 50 and the shaft 62.
- FIG. 10 is a schematic perspective view of a piezoelectric power generating element 4 according to a modification of the third embodiment of the present invention.
- FIG. 11 is a schematic exploded perspective view of a piezoelectric power generating element 4 according to a modification of the third embodiment of the present invention.
- the piezoelectric power generating element 4 according to this modification is different from the piezoelectric power generating element 3 according to the third embodiment in that it includes a speed change mechanism 70.
- the speed change mechanism 70 is composed of a plurality of gears, and is a mechanism that changes the rotational speed of the cam 61 with respect to the displacement speed of the slide member 50, that is, the reduction ratio. By providing the speed change mechanism 70, the frequency of vibration applied to the piezoelectric element 10 can be adjusted.
- Piezoelectric generator 10 Piezoelectric element 10a... First surface 10b... Second surface 20... Stopper 21. Part 24 ... Shaft 30 ... Lever 31 ... Contact part 31a ... Second contact surface 32 ... Displacement part 32a ... Rod-shaped member 33 ... Connection part 40 ... Biasing member 50 ... Slide member 50a ... Convex parts 50a1, 50a2 ... Inclination Surface 61 ... cams 62, 63 ... shaft 70 ... transmission mechanism
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
Description
図1は、本発明の第1の実施形態に係る圧電発電素子1の略図的斜視図である。図2は、本発明の第1の実施形態に係る圧電発電素子1の略図的平面図である。図3は、本発明の第1の実施形態に係る圧電発電素子1の略図的側面図である。図4は、本発明の第1の実施形態に係る圧電発電素子1の略図的正面図である。図1~図4には、x軸と、x軸に直交するy軸と、x軸およびy軸に直交するz軸とからなる直交座標系のx-y-z軸を付記している。ここで、x軸方向が第1の方向であり、y軸方向が第2の方向でありz軸方向が第3の方向である。
図5は、本発明の第2の実施形態に係る圧電発電素子2の略図的斜視図である。図6は、本発明の第2の実施形態に係る圧電発電素子2の略図的側面図である。
図7は、本発明の第3の実施形態に係る圧電発電素子3の略図的側面図である。図8は、本発明の第3の実施形態に係る圧電発電素子3の略図的斜視図である。図9は、本発明の第3の実施形態に係る圧電発電素子3の略図的分解斜視図である。
図10は、本発明の第3の実施形態の変形例に係る圧電発電素子4の略図的斜視図である。図11は、本発明の第3の実施形態の変形例に係る圧電発電素子4の略図的分解斜視図である。
10…圧電素子
10a…第1の面
10b…第2の面
20…ストッパ
21…当接部
21a…第1の当接面
22…支持部
23…接続部
24…シャフト
30…レバー
31…当接部
31a…第2の当接面
32…変位部
32a…棒状部材
33…接続部
40…付勢部材
50…スライド部材
50a…凸部
50a1,50a2…傾斜面
61…カム
62,63…シャフト
70…変速機構
Claims (7)
- 第1の方向の一方側に位置する第1の面と、第1の方向の他方側に位置しており、前記第1の面と対向している第2の面とを有する圧電素子と、
前記第1の面に当接している第1の当接面を有するストッパと、
前記第2の面に当接している第2の当接面を含む当接部と、前記第2の面よりも前記第1の方向の一方側に配置されている変位部とを有し、前記第1の方向に対して垂直な第2の方向に延びる回転軸を中心として前記ストッパに対して相対的に回転可能に設けられたレバーと、
を備え、
前記変位部が前記回転軸を中心として前記ストッパに対して相対的に回転した際に、前記第2の当接面が前記第2の面を押圧するように前記レバーが設けられている、圧電発電素子。 - 前記レバーは、前記ストッパによって回転可能に支持されている、請求項1に記載の圧電発電素子。
- 前記当接部と前記回転軸との間の最短距離が、前記変位部と前記回転軸との間の最短距離よりも短い、請求項1または2に記載の圧電発電素子。
- 前記レバーが前記ストッパに対して相対的に回転したときに、前記回転方向と逆向きの方向に前記レバーを付勢する付勢部材をさらに備える、請求項1~3のいずれか一項に記載の圧電発電素子。
- 前記付勢部材は、前記変位部を付勢する、請求項4に記載の圧電発電素子。
- 前記レバーを前記回転軸を中心として複数回回転させる駆動機構をさらに備える、請求項1~5のいずれか一項に記載の圧電発電素子。
- 圧電体と、
前記圧電体に応力を加える応力印加部材と、
を備える圧電発電素子であって、
前記圧電発電素子に外力が加わった際に、前記応力印加部材が前記圧電体に対して複数回応力を印加するように前記応力印加部材を駆動する駆動機構と、
を備える、圧電発電素子。
Priority Applications (4)
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EP12847297.4A EP2750281B1 (en) | 2011-11-09 | 2012-10-31 | Piezoelectric power generation element |
JP2013542939A JP5692408B2 (ja) | 2011-11-09 | 2012-10-31 | 圧電発電素子 |
CN201280046441.4A CN103828219B (zh) | 2011-11-09 | 2012-10-31 | 压电发电元件 |
US14/261,921 US9350273B2 (en) | 2011-11-09 | 2014-04-25 | Piezoelectric power generating device having a stress applying member |
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JP2011-245094 | 2011-11-09 | ||
JP2011245094 | 2011-11-09 |
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US14/261,921 Continuation US9350273B2 (en) | 2011-11-09 | 2014-04-25 | Piezoelectric power generating device having a stress applying member |
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EP (1) | EP2750281B1 (ja) |
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JP2015084618A (ja) * | 2013-10-25 | 2015-04-30 | 株式会社村田製作所 | エネルギー変換システム |
JP2018534904A (ja) * | 2015-09-25 | 2018-11-22 | フィテア テクノロジーPytheas Technology | 電気エネルギー生成に圧電発電機を使用する装置 |
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EP4178099B1 (en) * | 2020-07-06 | 2024-06-19 | Wenjing Wu | Self-generating device |
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- 2012-10-31 CN CN201280046441.4A patent/CN103828219B/zh active Active
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2015084618A (ja) * | 2013-10-25 | 2015-04-30 | 株式会社村田製作所 | エネルギー変換システム |
JP2018534904A (ja) * | 2015-09-25 | 2018-11-22 | フィテア テクノロジーPytheas Technology | 電気エネルギー生成に圧電発電機を使用する装置 |
Also Published As
Publication number | Publication date |
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EP2750281B1 (en) | 2016-12-14 |
US20140252918A1 (en) | 2014-09-11 |
JPWO2013069516A1 (ja) | 2015-04-02 |
JP2015035953A (ja) | 2015-02-19 |
JP5958521B2 (ja) | 2016-08-02 |
US9350273B2 (en) | 2016-05-24 |
CN103828219A (zh) | 2014-05-28 |
JP5692408B2 (ja) | 2015-04-01 |
EP2750281A1 (en) | 2014-07-02 |
CN103828219B (zh) | 2017-02-15 |
EP2750281A4 (en) | 2015-04-01 |
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