公开(公告)号：US20240255540A1

公开(公告)日：2024-08-01

申请号：US18419345

申请日：2024-01-22

Applicant: Proterial, Ltd.

Inventor： Yohei SHIRAKAWA ,  Yoshiaki YANAGISAWA ,  Yoshitake AGEISHI ,  Yujiro TOMITA

IPC: G01P3/50 ,  B62D3/12 ,  G01D5/20

CPC classification number: G01P3/505 ,  B62D3/12 ,  G01D5/2053

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 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.

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

CPC classification number: G01D5/20 ,  B62D5/046

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.

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

IPC: G01D5/20 ,  B62D15/02

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.

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.