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公开(公告)号：US20190277666A1
公开(公告)日：2019-09-12
申请号：US16420837
申请日：2019-05-23
Applicant: DENSO CORPORATION
Inventor： Tetsuya OHMI , Michihiro MAKITA
IPC: G01D5/245
Abstract: The rotation sensor includes a plurality of magnetic sensors for outputting a sine wave signal and a cosine wave signal corresponding to an electrical angle of rotation of the rotating body, and the magnetic sensors are arranged at equal intervals and in a circumferential direction of the rotating body apart from the outer periphery of the rotating body, and are fixed in position so as to detect a change in magnetic field caused by the change in the rotational position of the rotating body due to the rotation of the rotating body. The rotation sensor includes an arithmetic unit, which receives sine wave signals and cosine wave signals from a plurality of magnetic sensors, and adds and subtracts sine wave signals and cosine wave signals according to a predetermined rule, thereby cancels out the high-order components contained in sine wave signals and cosine wave signals.
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公开(公告)号：US20250155265A1
公开(公告)日：2025-05-15
申请号：US19024600
申请日：2025-01-16
Applicant: DENSO CORPORATION
Inventor： Yasuhiro KITAURA , Nagisa ONODA , Michihiro MAKITA , Tetsuya OHMI , Takamasa KIMPARA , Tomoyuki HARADA , Kazuhiro YOSHINO , Naohiro SUGIMOTO , Kazuaki WATANABE , Takuma ESAKA , Koki KAWAKAMI , Atsushi KOBAYASHI , Hidekazu WATANABE , Takeshi ITO , Koichiro MATSUMOTO , Tsukasa KONO , Ryosuke MURAYAMA
Abstract: A position detection device includes a substrate disposed to face a displaceable detection object, a transmitting coil provided in the substrate, a first receiving coil and a second receiving coil which are disposed inside the transmitting coil in a normal direction with respect to a surface direction of the substrate, and a signal processing unit that derives a displacement amount of the detection object in view of a gap between the detection object and the substrate, based on a first characteristic value of the first receiving coil and a second characteristic value of the second receiving coil.
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公开(公告)号：US20240142324A1
公开(公告)日：2024-05-02
申请号：US18410036
申请日：2024-01-11
Applicant: DENSO CORPORATION
Inventor： Toshiro SUZUKI , Michihiro MAKITA , Koichiro MATSUMOTO , Kazuhiro YOSHINO , Norihisa KOIDE , Nagisa ONODA
Abstract: A torque detection device includes a first yoke and a first magnetic guide member. A first opposing portion of the first magnetic guide member overlaps with a first-yoke ring of the first yoke when the first-yoke ring is projected onto the first opposing portion in an axial direction. Furthermore, the first opposing portion overlaps with an inner surface of a second tubular portion when the inner surface is projected onto the first opposing portion in the axial direction. A housing distance, which is a shortest distance measured from the first opposing portion to the inner surface, is longer than a yoke distance, which is a shortest distance measured from the first opposing portion to the first-yoke ring.
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公开(公告)号：US20200096367A1
公开(公告)日：2020-03-26
申请号：US16697806
申请日：2019-11-27
Applicant: DENSO CORPORATION
Inventor： Yasuhiro KITAURA , Atsushi KOBAYASHI , Michihiro MAKITA , Akito SASAKI , Tetsuya OHMI
Abstract: A position sensor includes a detector and a signal processor. The detector includes a magnet generating a bias magnetic field and a detection element configured to be applied by the bias magnetic field, and generates plural detection signals including distinct phase difference and corresponding to plural ranges aligned in one direction along a movement direction of a detection target, based on a change in a magnetic field received by the detection element from the detection target with a movement of the detection target having a magnetic body. The signal processor acquires the detection signals from the detector, compares the detection signals with a threshold value, and specifies a position of the detection target as a position at one of the ranges based on a combination of magnitude relation between the detection signals and the threshold value.
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公开(公告)号：US20200072593A1
公开(公告)日：2020-03-05
申请号：US16676645
申请日：2019-11-07
Applicant: DENSO CORPORATION
Inventor： Atsushi KOBAYASHI , Yasuhiro KITAURA , Michihiro MAKITA , Akito SASAKI , Tetsuya OHMI
Abstract: A position sensor includes a detector (122) and a signal processor (123). The detector generates detection signals, which have a distinct phase difference and which respectively correspond to ranges aligned in one direction along a movement direction of a detection target (200, 202, 203) having a magnetic material, based on a change in a magnetic field received from the detection target along with a movement of the detection target. The signal processor acquires the detection signals from the detector, compares the detection signals with a threshold value, and specifies a position of the detection target as a position covered by one of the ranges based on a combination of magnitude relations of the detection signals and the threshold value.
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Patent Agency Ranking
公开(公告)号：US20190137577A1
公开(公告)日：2019-05-09
申请号：US16234938
申请日：2018-12-28
Applicant: DENSO CORPORATION
Inventor： Yasuyuki OKUDA , Atsushi KOBAYASHI , Hiroki KAJIO , Michihiro MAKITA
IPC: G01R33/09
Abstract: A magnetic detection element includes an element part and a metal film. The element part is arranged on a surface of a substrate, and has linear portions arranged in parallel with each other and connecting portions connecting the linear portions in a meandering shape. The metal film has a first layered portion stacked on a turn portion of the element part defined by the connecting portion and a connection between the connecting portion and the linear portion, and a second layered portion formed integrally with the first layered portion to entirely cover a region of the surface surrounded by an internal end of the turn portion. The first layered portion has a peripheral side disposed between the internal end and an external end of the turn portion so as to expose an outer periphery of the turn portion.
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公开(公告)号：US20250076083A1
公开(公告)日：2025-03-06
申请号：US18948885
申请日：2024-11-15
Applicant: DENSO CORPORATION
Inventor： Yuki MATSUMOTO , Tsukasa KONO , Atsushi KOBAYASHI , Tetsuya OHMI , Michihiro MAKITA , Naoki WATANABE , Sukhwa JUNG
Abstract: Magnets are arranged at intervals along a stroke direction with an interposed space. Magnetic pole surfaces of adjacent ones of the magnets have opposite poles. A detector is arranged with a gap in a gap direction against a magnetic pole surface of each of the magnets and acquires a sine signal and a cosine signal as detection signals of phases corresponding to the positions of the magnets, based on a change in a magnetic field received from the magnets according to movement of the detector relative to the detection object in the stroke direction. A signal processor acquires the sine signal and the cosine signal from the detector, generates, based on the sine signal and the cosine signal, an arctangent signal corresponding to a stroke amount of the detection object relative to the detector, and acquires the arctangent signal as a position signal.
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公开(公告)号：US20230065022A1
公开(公告)日：2023-03-02
申请号：US18054265
申请日：2022-11-10
Applicant: DENSO CORPORATION
Inventor： Atsushi KOBAYASHI , Michihiro MAKITA , Yusuke KARIYA
IPC: G01D5/245
Abstract: A rotation detection device includes: a detector arranged with a gap to a rotating body in which rotation position information is periodically provided at regular intervals, and detecting a magnetic change as a rotation position of the rotating body; and a signal processor acquiring the rotation position information. The detector has first and second magnetic elements arranged with an interval of a/2 in a rotation direction. Each regular interval is defined as a. The first magnetic element outputs a first signal having a period corresponding to the regular intervals. The second magnetic element outputs a second signal having an opposite phase to the first signal and the period. The signal processor acquires a differential signal between the first and second signals as the rotation position information.
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公开(公告)号：US20200096368A1
公开(公告)日：2020-03-26
申请号：US16697902
申请日：2019-11-27
Applicant: DENSO CORPORATION
Inventor： Atsushi KOBAYASHI , Yasuhiro KITAURA , Michihiro MAKITA , Akito SASAKI , Tetsuya OHMI
IPC: G01D5/14
Abstract: A position sensor includes a detector and a signal processor. The detector includes: a sensor chip having a surface; a first detection element disposed at the surface of the sensor chip; and a second detection element disposed at the surface of the sensor chip. The signal processor processes a signal input from the detector. The first detection element outputs a first detection signal corresponding to a position of a detection target, based on a change in a magnetic field received from the detection target. The second detection element outputs a second detection signal corresponding to the position of the detection target, based on the change in the magnetic field received from the detection target. A center of balance of the first detection element coincides with a center of balance of the second detection element.
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公开(公告)号：US20200072863A1
公开(公告)日：2020-03-05
申请号：US16677975
申请日：2019-11-08
Applicant: DENSO CORPORATION
Inventor： Akito SASAKI , Atsushi KOBAYASHI , Michihiro MAKITA , Tetsuya OHMI
Abstract: A position sensor including: a power supply terminal to which a power supply voltage is applied; a ground terminal to which a ground voltage is applied; an output terminal that outputs a signal; a detection portion that operates based on the power supply voltage and the ground voltage, and detects a position of a detection target by a magnetic resistance element whose resistance value changes according to a movement of the detection target; and a signal processing portion that operates based on the power supply voltage and the ground voltage, and processes a signal input from the detection portion.
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