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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：US20230280221A1
公开(公告)日：2023-09-07
申请号：US18115294
申请日：2023-02-28
申请人： NSK LTD. , Proterial, Ltd.
IPC分类号： G01L3/10
摘要： A torque measuring device includes a bridge circuit in which four detection coils arranged around a magnetostrictive effect section of a rotating shaft are arranged on four sides; and the bridge circuit includes a resistance element connected to at least one of the four sides for adjusting a resistance value of the side.
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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：US20230280223A1
公开(公告)日：2023-09-07
申请号：US18176098
申请日：2023-02-28
申请人： NSK LTD. , PROTERIAL, LTD.
发明人： Masahiro KOBAYASHI , Kota FUKUDA , Hisayoshi FUKUI , Takahiro ODERA , Haruhiko TANNO , Yoshinori KUBO , Naoki FUTAKUCHI , Ken OKUYAMA , Teruyuki NAKAMURA
IPC分类号： G01L3/10
摘要： The manufacturing method includes: performing testing of samples having the same configuration as the torque measuring device to be manufactured to find a coil balance Cb that is a ratio (R1×R3)/(R2×R4) of a product R1×R3 of resistance values R1 and R3 of one pair of opposite sides of the four sides of a bridge circuit 8, and a product R2×R4 of resistance values R2 and R4 of another pair of opposite sides of the four sides, and a temperature change rate VT of output voltage Vo of a sensor portion 4, and acquiring a relationship X between the coil balance Cb and the temperature change rate VT from the test results; and measuring the resistance values R1, R2, R3, R4 of the four sides to find the coil balance Cb to find the temperature change rate VT from the relationship X for the torque measuring device to be manufactured.
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