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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
Applicant: Proterial, Ltd.
Inventor： Yohei SHIRAKAWA , Yuta SUGIYAMA , Yoshiaki YANAGISAWA , Yoshitake AGEISHI , Yukio IKEDA
IPC: G01D5/20
Abstract: 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：US20240255317A1
公开(公告)日：2024-08-01
申请号：US18420840
申请日：2024-01-24
Applicant: Proterial, Ltd.
Inventor： Yohei SHIRAKAWA , Yuta SUGIYAMA , Naoki FUTAKUCHI , Yukio IKEDA , Yujiro TOMITA
IPC: G01D5/20
CPC classification number: G01D5/2053 , G01D2205/10
Abstract: 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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Patent Agency Ranking
公开(公告)号：US20240255316A1
公开(公告)日：2024-08-01
申请号：US18420288
申请日：2024-01-23
Applicant: Proterial, Ltd.
Inventor： Yohei SHIRAKAWA , Yoshiaki YANAGISAWA , Yoshitake AGEISHI , Yukio IKEDA , Masanori SAGAWA
CPC classification number: G01D5/2053 , B62D15/0225
Abstract: 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 provided at the moving member, a substrate provided with an excitation coil 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 magnetic field diffusion suppression member for suppressing a spread of a magnetic field generated by energization to the excitation coil.
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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
Applicant: Proterial, Ltd.
Inventor： Yohei SHIRAKAWA , Yuta SUGIYAMA , Yoshiaki YANAGISAWA , Yoshitake AGEISHI , Yukio IKEDA
IPC: G01D5/20
CPC classification number: G01D5/204
Abstract: 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
Applicant: Proterial Ltd.
Inventor： Yohei SHIRAKAWA , Yuta SUGIYAMA , Yukio IKEDA
CPC classification number: G01D5/204 , B62D15/0225
Abstract: 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：US20240077334A1
公开(公告)日：2024-03-07
申请号：US18455132
申请日：2023-08-24
Applicant: Proterial, Ltd.
Inventor： Yohei SHIRAKAWA , Yukio IKEDA
CPC classification number: G01D5/20 , B62D15/0225
Abstract: 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：US20230408247A1
公开(公告)日：2023-12-21
申请号：US18332081
申请日：2023-06-09
Applicant: Proterial, Ltd.
Inventor： Yukio IKEDA , Masanori SAGAWA
CPC classification number: G01B7/30 , G01D5/145 , B62D15/0245 , B62D15/0215
Abstract: A rotation angle detection device includes at least one target rotating in unison with a shaft, a rotating member for rotating at a different rotation speed from the shaft as the shaft rotates, a first sensor whose output signal changes when the target is approached, a second sensor that detects the rotation angle of the rotating member within one rotation, and a computing section that calculates the absolute angle of the shaft based on the output signal of the first sensor and the rotation angle of the rotating member detected by the second sensor. The output signal of the first sensor changes at a period different from the rotation period of the rotating member when the shaft rotates, and the computing section detects the absolute angle of the shaft at that time from the rotation angle of the rotating member when the output signal of the first sensor changes.
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