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公开(公告)号：US10756651B2
公开(公告)日：2020-08-25
申请号：US15891858
申请日：2018-02-08
发明人： Kazuhiro Okada , Miho Okada
IPC分类号： H02N1/08
摘要： Provided is a power generating element and a power generating device capable of using vibration energy not used for power generation in the past. The power generating element includes a displacement member, a fixed member, and an elastic deformation body. An electret material layer is formed on a surface of one of the displacement member and the fixed member. A counter electrode layer opposed to the electret material layer is formed on the other surface. When vibration energy is given to the power generating element, the displacement member is displaced with respect to the fixed member such that an inter-layer distance between the electret material layer and the counter electrode layer fluctuates according to deformation of the elastic deformation body.
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公开(公告)号：US20200256750A1
公开(公告)日：2020-08-13
申请号：US15763163
申请日：2018-02-09
发明人： Kazuhiro OKADA , Satoshi ERA
摘要： A force sensor according to the present invention includes a closed loop shaped deformable body and a detection circuit that outputs an electric signal indicating an applied force or a moment on the basis of elastic deformation generated in the deformable body. The deformable body includes at least two fixed portions, at least two force receiving portions adjacent to the fixed portion in a closed loop shaped path of the deformable body, and a deformable portion positioned between the fixed portion and the force receiving portion adjacent to each other in the closed loop shaped path. The deformable portion includes: a main curved portion having a curved main curved surface; a fixed portion-side curved portion connecting the main curved portion to the corresponding fixed portion and having a fixed portion-side curved surface; and a force receiving portion-side curved portion connecting the main curved portion to the corresponding force receiving portion and having a force receiving portion-side curved surface. Both of the curved surfaces are provided on the positive side on the Z-axis or the negative side on the Z-axis of the deformable portion, with mutually different curved directions. The detection circuit outputs an electric signal on the basis of elastic deformation generated in the main curved portion.
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公开(公告)号：US10468997B2
公开(公告)日：2019-11-05
申请号：US15758501
申请日：2016-06-01
发明人： Kazuhiro Okada , Miho Okada
IPC分类号： H01L41/047 , H02N2/00 , H02N2/18 , H01L41/113
摘要： A tabular structure having flexibility extends from a root end portion to a distal end portion along a reference axis. The root end portion is fixed to a pedestal. Three sectioned parts are provided in the tabular structure. Weights are joined to the lower surfaces of the respective three sectioned parts. The three sectioned parts respectively have different thicknesses. As a result, spring constants are different. When vibration energy from the outside is applied to the pedestal, the weights vibrate and a bend occurs in the tabular structure. If a charge generating element such as a piezoelectric element is stuck to the tabular structure, an electric charge is generated by bending stress. A frequency band capable of generating electric power is expanded by providing a plurality of weights in the tabular structure in which the spring constants are different in each of the sectioned parts.
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公开(公告)号：US20190280626A1
公开(公告)日：2019-09-12
申请号：US16357132
申请日：2019-03-18
发明人： Kazuhiro OKADA , Miho OKADA
IPC分类号： H02N2/18 , H01L41/113
摘要： There is provided a power generating element which is capable of converting vibration energy in various directions into electric energy without waste and less likely to be damaged even upon application of excessive vibration. Made available is a main generating structure (MGS) in which a first layer (100), a second layer (200) and a third layer (300) are laminated. The second layer (200) has a plate-like bridge portion (210), a central plate-like portion (220), a left-hand side plate-like portion (230) and a right-hand side plate-like portion (240), each of which is flexible, and the third layer (300), that is a weight body, formed in the “U” letter shape is joined with the lower surface thereof. The plate-like bridge portion (210) is protected by the weight body (300) circumference thereof. The first layer (100) is structured so that a piezoelectric material layer (105) is laminated on an upper surface of a lower layer electrode (E0), and four localized upper layer electrodes (E1 to E4) are laminated on the upper surface thereof. The base end of the plate-like bridge portion (210) is fixed to a pedestal (400). Vibration of the weight body (300) is efficiently transmitted to the plate-like bridge portion (210) and the bridge portion piezoelectric layer (110), and a power generating circuit (500) outputs electric power on the basis of charge generated at the lower layer electrode (E0) and the upper layer electrodes (E1 to E4).
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公开(公告)号：US10177689B2
公开(公告)日：2019-01-08
申请号：US14914854
申请日：2014-05-15
发明人： Kazuhiro Okada , Satoshi Era , Miho Okada
IPC分类号： H01L41/113 , H02N2/18 , H01L41/053
摘要： The power generation efficiency is to be enhanced by converting vibration energy including various direction components into electric energy without waste. A cantilever structure is adopted, in which a first plate-like bridge portion (120) and a second plate-like bridge portion (130) extend in a shape of a letter U from a fixing-portion (110) fixed to the device housing (200) and a weight body (150) is connected to the end. On the upper surface of the cantilever structure, a common lower layer electrode (E00), a layered piezoelectric element (300) and discrete upper layer electrodes (Ex1 to Ez4) are formed. The upper layer electrodes (Ez1 to Ez4) disposed on a center line (Lx, Ly) of each plate-like bridge portion take out charge generated in the piezoelectric element (300) due to deflection caused by the Z-axis direction vibration of the weight body (150). The upper layer electrodes (Ex1 to Ex4, Ey1 to Ey4) disposed on both sides of the center line (Lx, Ly) of the plate-like bridge portion take out charge generated in the piezoelectric element (300) due to deflection caused by the X-axis or Y-axis direction vibration of the weight body (150).
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公开(公告)号：US20180259404A1
公开(公告)日：2018-09-13
申请号：US15757394
申请日：2016-06-09
发明人： Kazuhiro OKADA , Miho OKADA , Nobuhisa NISHIOKI
摘要： A force sensor of the present invention includes: a supporting body arranged on an X-Y plane; a deformation body arranged opposite to the supporting body and having a deformation part elastically deformed by an action of a force to be detected; a fixed electrode arranged on the supporting body; a displacement electrode provided to the deformation part of the deformation body in such a manner as to face the fixed electrode with which it forms a capacitive element; and a detection circuit that outputs an electrical signal representing the acting force based on a variation amount of a capacitance value of the capacitive element, wherein the capacitive element includes a first capacitive element and a second capacitive element, and the detection circuit determines whether the force sensor is normally functioning based on a first electrical signal corresponding to a capacitance value of the first capacitive element, a second electrical signal corresponding to a capacitance value of the second capacitive element, and an added electrical signal corresponding to a sum of the capacitance values of the first and second capacitive elements.
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公开(公告)号：US20160211778A1
公开(公告)日：2016-07-21
申请号：US14914854
申请日：2014-05-15
发明人： Kazuhiro OKADA , Satoshi ERA , Miho OKADA
IPC分类号： H02N2/18 , H01L41/113 , H01L41/053
CPC分类号： H02N2/186 , H01L41/053 , H01L41/1136 , H02N2/188
摘要： The power generation efficiency is to be enhanced by converting vibration energy including various direction components into electric energy without waste. A cantilever structure is adopted, in which a first plate-like bridge portion (120) and a second plate-like bridge portion (130) extend in a shape of a letter U from a fixing-portion (110) fixed to the device housing (200) and a weight body (150) is connected to the end. On the upper surface of the cantilever structure, a common lower layer electrode (E00), a layered piezoelectric element (300) and discrete upper layer electrodes (Ex1 to Ez4) are formed. The upper layer electrodes (Ez1 to Ez4) disposed on a center line (Lx, Ly) of each plate-like bridge portion take out charge generated in the piezoelectric element (300) due to deflection caused by the Z-axis direction vibration of the weight body (150). The upper layer electrodes (Ex1 to Ex4, Ey1 to Ey4) disposed on both sides of the center line (Lx, Ly) of the plate-like bridge portion take out charge generated in the piezoelectric element (300) due to deflection caused by the X-axis or Y-axis direction vibration of the weight body (150).
摘要翻译： 通过将包括各种方向分量的振动能量转换成电能而不浪费，可以提高发电效率。 采用悬臂结构，其中第一板状桥接部分（120）和第二板状桥接部分（130）从固定到装置壳体（110）的固定部分（110）延伸成字母U的形状 （200）和重量体（150）连接到端部。 在悬臂结构的上表面上，形成共同的下层电极（E00），层叠型压电元件（300）和离散的上层电极（Ex1〜Ez4）。 设置在每个板状桥接部分的中心线（Lx，Ly）上的上层电极（Ez1至Ez4）由于压电元件（300）的Z轴方向振动引起的偏转而导致在压电元件（300）中产生的电荷 体重（150）。 设置在板状桥接部分的中心线（Lx，Ly）两侧的上层电极（Ex1至Ex4，Ey1至Ey4）由于由于压电元件（300）的偏移而导致在压电元件（300）中产生的电荷 重量体（150）的X轴或Y轴方向振动。
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公开(公告)号：US11499878B2
公开(公告)日：2022-11-15
申请号：US16944964
申请日：2020-07-31
发明人： Kazuhiro Okada , Miho Sekine , Yuki Hongo
摘要： A strain body of a force sensor according to the present invention includes a tilting structure disposed between a force receiving body and a support body, a force-receiving-body-side deformable body connecting the force receiving body and the tilting structure, and a support-body-side deformable body connecting the tilting structure and the support body. The tilting structure includes a first tilting body that extends in a second direction orthogonal to a first direction and that is elastically deformable by the action of force in the first direction.
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公开(公告)号：US10557766B2
公开(公告)日：2020-02-11
申请号：US15761713
申请日：2016-07-20
发明人： Kazuhiro Okada , Miho Okada
摘要： A torque sensor includes: an annular deformation body; first and second displacement electrodes which cause displacement by elastic deformation of the annular deformation body; first and second fixed electrodes arranged at positions opposite the first and second displacement electrodes; and a detection circuit that outputs an electric signal indicating a torque based on a variation amount of capacitance values of first and second capacitive elements each of which is configured of the displacement electrode and the fixed electrode. The annular deformation body includes a high elastic portion and a low elastic portion having a spring constant smaller than a spring constant of the high elastic portion. The detection circuit determines whether the torque sensor functions normally based on a ratio between first and second electric signals.
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公开(公告)号：US10557764B2
公开(公告)日：2020-02-11
申请号：US15546605
申请日：2015-01-26
发明人： Kazuhiro Okada , Miho Okada
摘要： A torque sensor including an annular deformation body, left side support body, right side support body, left side connection members which connect left side connection points of the annular deformation body with the left side support body, and right side connection members which connect right side connection points of the annular deformation body with the right side support body. Orthogonal projection images of the left side connection points on the basic plane and orthogonal projection images of the right side connection points on the basic plane are formed at mutually different positions.
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