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公开(公告)号：US20240359738A1
公开(公告)日：2024-10-31
申请号：US18643529
申请日：2024-04-23
申请人： Proterial, Ltd.
CPC分类号： B62D15/0225 , G01D5/145 , G05D1/2437
摘要： A position detection device, configured to detect a position of a shaft that moves forward and backward in an axial direction, is provided with an excitation coil that generates an alternating magnetic field; a target which is fixed to the shaft and in which a magnetic flux of the alternating magnetic field is interlinked; and a detection coil in which the magnetic flux of the alternating magnetic field is interlinked, wherein the detection coil has a first portion and a second portion, where an induced voltage is generated by the magnetic flux of the alternating magnetic field being interlinked, and a connecting path connecting the first portion and the second portion. The first portion and the second portion respectively extend along the axial direction and the coil longitudinal direction parallel to the axial direction and at least a portion of each is aligned in an alignment direction perpendicular to the axial direction. The target includes a first target portion facing the first portion, and a second target portion facing the second portion. The induced voltage generated in the first portion changes according to a position of the first target portion relative to the first portion. The induced voltage generated in the second portion changes according to a position of the second target portion relative to the second portion.
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公开(公告)号：US20240343303A1
公开(公告)日：2024-10-17
申请号：US18625939
申请日：2024-04-03
申请人： Proterial, Ltd.
发明人： Yohei SHIRAKAWA , Yuta SUGIYAMA
摘要： A position detection device for detecting a position of a rack shaft having a rack teeth portion that meshes with a pinion gear in a part in an axial direction is provided with a coil that is arranged around a periphery of the rack shaft, and a calculation unit that calculates the position of the rack shaft based on an inductance of the coil. The coil is arranged to surround at least a part of the rack teeth portion, and the inductance changes in accordance with the position of the rack shaft.
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公开(公告)号：US20240337513A1
公开(公告)日：2024-10-10
申请号：US18625343
申请日：2024-04-03
申请人： Proterial, Ltd.
发明人： Yohei SHIRAKAWA , Yuta SUGIYAMA
CPC分类号： G01D5/2451 , B62D5/0421 , B62D5/0442 , B62D15/0225 , G01D2205/10
摘要： A position detection device for detecting a position of a rack shaft having a rack teeth portion that meshes with a pinion gear in a part in an axial direction, is provided with a capacitance member that is arranged around a periphery of the rack shaft and forms a capacitive load together with the rack shaft, and a calculation unit that calculates the position of the rack shaft based on a capacitance between the rack shaft and the capacitance member. The capacitance member is arranged to face at least a part of the rack teeth portion. The capacitance changes in accordance with the position of the rack shaft.
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公开(公告)号：US20240255317A1
公开(公告)日：2024-08-01
申请号：US18420840
申请日：2024-01-24
申请人： Proterial, Ltd.
发明人： Yohei SHIRAKAWA , Yuta SUGIYAMA , Naoki FUTAKUCHI , Yukio IKEDA , Yujiro TOMITA
IPC分类号： G01D5/20
CPC分类号： G01D5/2053 , G01D2205/10
摘要： A position detection device for detecting a position of a shaft moving forward and backward in an axial direction is provided with a detection object mounted on the shaft, a substrate disposed to face the detection object, an excitation coil that is mounted on the substrate and generates an AC magnetic field, a detection coil that is mounted on the substrate and arranged along the axial direction of the shaft and configured so that a magnitude of a voltage induced varies with a position of the detection object, and a sensor for detecting a physical quantity used to correct the position of the shaft by using a sensor coil configured by the excitation coil, the detection coil, or an other coil provided on the substrate.
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公开(公告)号：US20240142277A1
公开(公告)日：2024-05-02
申请号：US18491352
申请日：2023-10-20
申请人： Proterial, Ltd.
IPC分类号： G01D5/20
CPC分类号： G01D5/204
摘要： A position detection device detects a position of a moving member moving backward and forward in a predetermined moving direction. The position detection device includes an exciting coil disposed along the moving member and extending in the moving direction, a detection coil that outputs a voltage corresponding to a position of a detection target portion moving with the moving member by means of a magnetic field generated by the exciting coil within a predetermined detection range in the moving direction, and a calculation unit that calculates the position of the moving member by the output voltage of the detection coil. The detection coil includes a pair of coil elements whose output voltage changes according to the position of the moving member, and phases of the output voltages of the pair of coil elements during movement of the moving member within the detection range differ from each other.
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公开(公告)号：US20230251112A1
公开(公告)日：2023-08-10
申请号：US18107184
申请日：2023-02-08
申请人： Proterial Ltd.
发明人： Yohei SHIRAKAWA , Yuta SUGIYAMA , Yukio IKEDA
CPC分类号： G01D5/204 , B62D15/0225
摘要： A position detection device for detecting a position of a shaft moving forward and backward in an axial direction is provided with a detection object attached to the shaft, an excitation coil for generating an alternating magnetic field, and a detection coil arranged along an axial direction of the shaft. A magnitude of a voltage induced in the detection coil varies in accordance with a position of the detection object.
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公开(公告)号：US20240159604A1
公开(公告)日：2024-05-16
申请号：US18508500
申请日：2023-11-14
申请人： Proterial, Ltd.
发明人： Yuta SUGIYAMA
IPC分类号： G01L1/12
CPC分类号： G01L1/12
摘要： A load sensor is provided with a pressure-receiving core made of a magnetostrictive material on which a load to be detected acts, a non-pressure-receiving core made of a magnetic material concentrically arranged with the pressure-receiving core and on which the load to be detected does not act, a detection coil that generates a magnetic flux that passes through the pressure-receiving core by energizing, and a reference coil that, when energized, generates a magnetic flux that does not pass through the pressure-receiving core but passes through the non-pressure-receiving core.
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公开(公告)号：US20230384124A1
公开(公告)日：2023-11-30
申请号：US18199585
申请日：2023-05-19
申请人： Proterial, Ltd.
发明人： Yohei SHIRAKAWA , Yuta SUGIYAMA
IPC分类号： G01D5/20
摘要： A position detection device for detecting a position of a shaft moving forward and backward in an axial direction is provided with a detection object attached to the shaft, an excitation coil for generating an alternating magnetic field, a power supply for supplying an alternating current to the excitation coil, and a detection coil arranged to be extending along an axial direction of the shaft and being interlinked with a magnetic flux of the alternating magnetic field. The excitation coil is arranged to surround the detection coil, and the detection coil includes a distorted curved portion being distorted with respect to a sine wave curve in such a manner that a peak value of a voltage induced in the detection coil changes into a sine wave shape when the shaft moves along the axial direction at a constant speed.
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公开(公告)号：US20240142275A1
公开(公告)日：2024-05-02
申请号：US18488495
申请日：2023-10-17
申请人： Proterial, Ltd.
IPC分类号： G01D5/20
摘要： A position detection device configured to detect a position of a moving member that moves back and forth in a predetermined moving direction is provided with an exciting coil arranged to extend in the moving direction along the moving member, a detection coil that, by a magnetic field generated by the exciting coil, outputs a voltage corresponding to a position of a detection object portion moving together with the moving member within a predetermined detection range in the moving direction, and a calculation unit that determines the position of the moving member by calculation based on an output voltage of the detection coil. The detection object portion has a predetermined length in the moving direction, and a voltage is generated in the detection coil due to a difference in magnetic field intensity between a portion corresponding to the detection object portion and a portion not corresponding to the detection object portion. During movement of the moving member in one direction, the output voltage of the detection coil changes sinusoidally over the entire period between when the detection coil and at least a portion of the detection object portion begin to line up in a direction perpendicular to the moving direction and when the entire detection object portion becomes out of alignment with the detection coil in the direction perpendicular to the moving direction.
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