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公开(公告)号：US20240110815A1
公开(公告)日：2024-04-04
申请号：US18470203
申请日：2023-09-19
申请人： Proterial, Ltd.
CPC分类号： G01D5/20 , B62D15/0225
摘要： A position detection device is configured to detect a position of a moving member moving backward and forward in a predetermined moving direction. The position detection device is provided with a conductive detection member attached to the moving member, and an exciting coil and a detection coil that are arranged extending in the moving direction of the moving member and facing the conductive detection member. The conductive detection member includes a recessed portion recessed in a direction away from the exciting coil and the detection coil. A voltage is induced in the detection coil by a current flowing in the conductive detection member due to a magnetic field generated by the exciting coil, and a magnitude of the voltage induced in the detection coil varies with a position of the recessed portion relative to the detection coil. A vehicle steering device is provided with a shaft, a housing, and the position detection device.
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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：US20240077334A1
公开(公告)日：2024-03-07
申请号：US18455132
申请日：2023-08-24
申请人： Proterial, Ltd.
发明人： Yohei SHIRAKAWA , Yukio IKEDA
CPC分类号： G01D5/20 , B62D15/0225
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, and a detection coil that, by an action of a magnetic field generated by the exciting coil, can detect a position, in the moving direction, of a detection object portion provided on the moving member within a predetermined detection range. A plurality of the detection coils are arranged side by side in a direction perpendicular to an extending direction of the exciting coil. A plurality of the detection object portions are provided at different positions in the moving direction so as to respectively correspond to the plurality of the detection coils, and the respective detection ranges of the plurality of the detection coils are offset in the moving direction of the moving member.
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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：US20240255540A1
公开(公告)日：2024-08-01
申请号：US18419345
申请日：2024-01-22
申请人： Proterial, Ltd.
CPC分类号： G01P3/505 , B62D3/12 , G01D5/2053
摘要： A position detection device for detecting a position of a moving member moving forward and backward in a predetermined moving direction is provided with a detection object attached to the moving member, a substrate provided with an excitation coil being positioned to face the moving member and parallel to the moving direction of the moving member for generating a magnetic field in an area including the detection object, and a detection coil being interlinked with a magnetic flux of the magnetic field, a power supply unit for supplying an alternating current to the excitation coil, a calculation unit that calculates the position of the moving member based on an output voltage of the detection coil, and a spacing fluctuation suppression structure that suppresses fluctuations in a spacing between a facing surface facing the detection object and the detection object in the substrate.
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公开(公告)号：US20240361154A1
公开(公告)日：2024-10-31
申请号：US18643563
申请日：2024-04-23
申请人： Proterial, Ltd.
CPC分类号： G01D5/2046 , B62D15/02 , G01D2205/18
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 fixed to the shaft and interlinked with a magnetic flux of the alternating magnetic field; and a detection coil in which the magnetic flux of the alternating magnetic field is interlinked. The detection coil has a first portion and a second portion in which an induced voltage is generated when the magnetic flux of the alternating magnetic field is interlinked, and a connection portion connecting the first portion and the second portion. The first portion and the second portion respectively extend along a coil longitudinal direction parallel to the axial direction, and at least a portion of each is aligned perpendicular to the coil longitudinal direction. The target has at least one first target portion facing the first portion and at least two second target portions facing the second portion, with the at least two second target portions being spaced apart in the axial direction. An induced voltage generated in the first portion varies with a position of the first target portion with respect to the first portion, and an induced voltage generated in the second portion varies with a position of the second target portion with respect to the second portion. The first target portion is located between the at least two second target portions in the axial direction, and when the shaft is in a central position between one axial moving end and an other axial moving end, the first target portion faces a central part in the coil longitudinal direction of the first portion.
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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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公开(公告)号：US20240094031A1
公开(公告)日：2024-03-21
申请号：US18464812
申请日：2023-09-11
申请人： Proterial, Ltd.
CPC分类号： G01D5/2053 , B62D5/0421 , B62D15/0215
摘要： A position detecting device is configured to detect a position of a moving member in which a conductive portion and a non-conductive portion having greater electrical resistance than the conductive portion are provided side by side in a predetermined moving direction. The position detection device is provided with an exciting coil and a detection coil that are arranged extending in the moving direction of the moving member. A voltage is induced in the detection coil by a current flowing in the conductive portion due to a magnetic field generated by the exciting coil. A magnitude of the voltage induced in the detection coil varies with a position in the moving direction of the moving member relative to the detection coil. A vehicle steering device is provided with a shaft, a housing, and the position detecting device.
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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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