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公开(公告)号：US20230152172A1
公开(公告)日：2023-05-18
申请号：US17619496
申请日：2021-02-18
发明人： Kazuhiro OKADA , Miho SEKINE
CPC分类号： G01L5/165 , G01L3/1428 , G01L5/0076
摘要： A torque sensor according to the present invention includes a strain body, first structure Y-axis connecting portions, second structure X-axis connecting portions and a detection element. The first structure Y-axis connecting portions are disposed on a positive side and a negative side of a Y-axis relative to the strain body, and the second structure X-axis connecting portions are disposed on a positive side and a negative side of an X-axis relative to the second structure. The strain body includes four deformable bodies each including a displacement portion that is displaced in a Z-axis direction by elastic deformation. The deformable bodies are respectively disposed in a first quadrant, a second quadrant, a third quadrant, and a fourth quadrant. The detection element includes a capacitive element that detects a change in capacitance value by a displacement of the displacement portion of each of the deformable bodies in the Z-axis direction.
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公开(公告)号：US11329576B2
公开(公告)日：2022-05-10
申请号：US15918691
申请日：2018-03-12
发明人： Kazuhiro Okada , Miho Okada
IPC分类号： H02N2/18
摘要： A power generating element is provided that includes first and second plate-like structures, a pedestal that supports the first plate-like structure, and first and second piezoelectric elements that generate charges on the basis of the deflections of the two plate-like structures. A base end portion of the first plate-like structure is connected to the pedestal, and a direction from the base end portion toward the tip end portion of the first plate-like structure is a Y-axis positive direction. A base end portion of the second plate-like structure is connected to the tip end portion of the first plate-like structure via a connection body, and a direction from the base end portion toward the tip end portion of the second plate-like structure is a Y-axis negative direction. A frequency band of a half-value width of a resonance system formed on the basis of the flexibility of the second plate-like structure at least partially overlaps a frequency band of a half-value width of a resonance system formed on the basis of the flexibility of the first plate-like structure.
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公开(公告)号：US20220107231A1
公开(公告)日：2022-04-07
申请号：US17402829
申请日：2021-08-16
发明人： Kazuhiro OKADA , Miho OKADA
摘要： The present invention provides a torque sensor that is small and highly rigid and for which high production efficiency is possible. An annular deformation body (50) is disposed between a left side support body (10) and a right side support body (20). Protruding parts (11, 12) of the left side support body (10) are joined to two upper and lower sites on the left side surface of the annular deformation body (50), and protruding parts (21, 22) of the right side support body (20) are joined to two left and right sites on the right side surface of the annular deformation body (50). The annular deformation body (50) has, at four sites, detection parts (D1 to D4) that cause elastic deformation, the right side surface of each of the detection parts (D1 to D4) moves close to or moves away from the opposing surface of the right side support body (20) when torque around the Z axis is exerted on the left side support body (10) in a state that a load is applied to the right side support body (20). A displacement electrode is formed on a right side surface of each of the detection parts (D1 to D4) and a fixed electrode is formed on an opposing surface of the right side support body (20) to constitute four sets of capacitive elements, thereby detecting torque exerted as fluctuation in capacitance value thereof.
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公开(公告)号：US11088637B2
公开(公告)日：2021-08-10
申请号：US16210479
申请日：2018-12-05
发明人： Kazuhiro Okada , Satoshi Era , Miho Okada
IPC分类号： H02N2/18 , H01L41/113 , 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：US10284119B2
公开(公告)日：2019-05-07
申请号：US15285143
申请日：2016-10-04
发明人： Kazuhiro Okada , Miho Okada
IPC分类号： H01L41/113 , H02N2/18
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：US20190094086A1
公开(公告)日：2019-03-28
申请号：US15926819
申请日：2018-03-20
发明人： Kazuhiro OKADA , Satoshi ERA , Miho OKADA
IPC分类号： G01L1/14
摘要： The present invention is to provide a capacitive force sensor that is inexpensive but highly sensitive, and is hardly affected by temperature changes and in-phase noise in the use environment.A force sensor 100c includes: a deformable body 10 having a force receiving portion 14 and a fixed portion 15; a displacement body 20 that is connected to the deformable body 10, and is displaced by elastic deformation caused in the deformable body 10; and a detection circuit 40 that detects an applied force, in accordance with the displacement caused in the displacement body 20. The deformable body 10 includes a tilting portion 13 that has a longitudinal direction I and is disposed between the force receiving portion 14 and the fixed portion 15. The displacement body 20 includes displacement portions D1 and D2 that are connected to the tilting portion 13 and are displaced by tilting movement of the tilting portion 13. The detection circuit 40 includes capacitive elements C1 and C2 disposed at the displacement portions D1 and D2, and detects an applied force, in accordance with changes in the capacitance values of the capacitive elements C1 and C2.
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公开(公告)号：US20180348074A1
公开(公告)日：2018-12-06
申请号：US15761713
申请日：2016-07-20
发明人： Kazuhiro OKADA , Miho OKADA
CPC分类号： G01L3/106 , G01L3/1442 , G01L5/226 , G01L25/003
摘要： A torque sensor according to the present invention 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 to 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 outputs a first electric signal corresponding to a capacitance value of the first capacitive element and a second electric signal corresponding to a capacitance value of the second capacitive element as an electric signal indicating the acting torque, and determines whether the torque sensor functions normally based on a ratio between the first electric signal and the second electric signal.
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公开(公告)号：US20180209860A1
公开(公告)日：2018-07-26
申请号：US15745979
申请日：2016-07-21
IPC分类号： G01L3/10
CPC分类号： G01L3/10 , G01L1/14 , G01L1/2231 , G01L3/106 , G01L3/14 , G01L3/1428 , G01L3/1435 , G01L3/1442 , G01L5/16 , G01L5/165
摘要： An inner support member, a detection deformable body, and a ring-shaped outer support member are disposed sequentially from the inside to the outside around a Z axis as a central axis. Inner surfaces in the vicinity of inner support points of the detection deformable body connect to outer surfaces of the inner support member via inner connecting members, and outer surfaces in the vicinity of outer support points of the detection deformable body connect to inner surfaces of the outer support member via outer connecting members. When a torque acts in the clockwise direction on the outer support member (130) while the inner support member is fixed, detection parts are displaced outwardly, and detection parts are displaced inwardly. These displacements are detected electrically as changes in capacitance values of four capacitor elements including opposing electrodes.
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公开(公告)号：US11761831B2
公开(公告)日：2023-09-19
申请号：US17829567
申请日：2022-06-01
发明人： Kazuhiro Okada , Miho Sekine , Yuki Hongo
CPC分类号： G01L1/2287 , G01L1/144
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：US10734922B2
公开(公告)日：2020-08-04
申请号：US15758634
申请日：2017-04-05
发明人： Kazuhiro Okada , Miho Okada
摘要： A power generating element 1 according to an embodiment includes a displacement member 10, a displacement member 20, and a fixed member 30. The displacement member 10 and the displacement member 20 are connected via an elastic deformation body 41. The displacement member 10 is connected to an attachment section 51 via an elastic deformation body 42. The displacement member 10 and/or the displacement member 20 includes a first power generation surface. The fixed member 30 includes a second power generation surface opposed to the first power generation surface. An electret material layer is provided on one surface of the first power generation surface and the second power generation surface. A counter electrode layer is provided on the other surface.
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