Patents by Inventor Tetsuya OHMI
Tetsuya OHMI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11733063Abstract: 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.Type: GrantFiled: November 27, 2019Date of Patent: August 22, 2023Assignee: DENSO CORPORATIONInventors: Atsushi Kobayashi, Yasuhiro Kitaura, Michihiro Makita, Akito Sasaki, Tetsuya Ohmi
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Publication number: 20230258474Abstract: A detecting unit generates detection signals corresponding to a plurality of ranges aligned in one direction along a moving direction of a detection body, based on a change in the magnetic field constantly received by a detecting element from the detection body. A signal processing unit acquires a detection signal from the detecting unit, compares the detection signal with a threshold value, and identifies a position of the detection body as a position of any one of a plurality of ranges based on a combination of a magnitude relationship between the detection signal and the threshold value. A detection body has a plurality of region portions corresponding to a plurality of ranges. The plurality of region portions are configured to be connected stepwise in the moving direction of the detection body within a plane of a detection surface facing the detecting unit of the detection body.Type: ApplicationFiled: April 18, 2023Publication date: August 17, 2023Inventors: TETSUYA OHMI, MICHIHIRO MAKITA, MASAHIKO AKIYAMA, MASASHI MISAWA, KENSHI MASUO
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Publication number: 20230160723Abstract: 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.Type: ApplicationFiled: December 28, 2022Publication date: May 25, 2023Inventors: YUKI MATSUMOTO, TSUKASA Kono, ATSUSHI KOBAYASHI, TETSUYA OHMI, MICHIHIRO MAKITA, NAOKI WATANABE, SUKHWA JUNG
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Patent number: 11652013Abstract: A sensor device includes: a first sensor element; a second sensor element; and a processing chip that includes a semiconductor substrate, a first processor that receives a first detection signal and processes the first detection signal, a second processor that receives the second detection signal and processes the second detection signal, and an isolation portion that electrically isolates the first processor the second processor. The first processor includes a first diagnosis unit that self-diagnoses a presence or absence of a failure. The second processor includes a second diagnosis unit that self-diagnoses a presence or absence of a failure. The processing chip identifiably outputs a first output of the first processor and a second output of the second processor.Type: GrantFiled: June 9, 2022Date of Patent: May 16, 2023Assignee: DENSO CORPORATIONInventor: Tetsuya Ohmi
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Patent number: 11626338Abstract: A sensor device includes: a first sensor element; a second sensor element; and a processing chip that includes a semiconductor substrate, a first processor that receives a first detection signal and processes the first detection signal, a second processor that receives the second detection signal and processes the second detection signal, and an isolation portion that electrically isolates the first processor the second processor. The first processor includes a first diagnosis unit that self-diagnoses a presence or absence of a failure. The second processor includes a second diagnosis unit that self-diagnoses a presence or absence of a failure. The processing chip identifiably outputs a first output of the first processor and a second output of the second processor.Type: GrantFiled: June 9, 2022Date of Patent: April 11, 2023Assignee: DENSO CORPORATIONInventor: Tetsuya Ohmi
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Patent number: 11615995Abstract: A sensor device includes: a first sensor element; a second sensor element; and a processing chip that includes a semiconductor substrate, a first processor that receives a first detection signal and processes the first detection signal, a second processor that receives the second detection signal and processes the second detection signal, and an isolation portion that electrically isolates the first processor the second processor. The first processor includes a first diagnosis unit that self-diagnoses a presence or absence of a failure. The second processor includes a second diagnosis unit that self-diagnoses a presence or absence of a failure. The processing chip identifiably outputs a first output of the first processor and a second output of the second processor.Type: GrantFiled: June 9, 2022Date of Patent: March 28, 2023Assignee: DENSO CORPORATIONInventor: Tetsuya Ohmi
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Patent number: 11493528Abstract: 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.Type: GrantFiled: November 8, 2019Date of Patent: November 8, 2022Assignee: DENSO CORPORATIONInventors: Akito Sasaki, Atsushi Kobayashi, Michihiro Makita, Tetsuya Ohmi
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Publication number: 20220301961Abstract: A sensor device includes: a first sensor element; a second sensor element; and a processing chip that includes a semiconductor substrate, a first processor that receives a first detection signal and processes the first detection signal, a second processor that receives the second detection signal and processes the second detection signal, and an isolation portion that electrically isolates the first processor the second processor. The first processor includes a first diagnosis unit that self-diagnoses a presence or absence of a failure. The second processor includes a second diagnosis unit that self-diagnoses a presence or absence of a failure. The processing chip identifiably outputs a first output of the first processor and a second output of the second processor.Type: ApplicationFiled: June 9, 2022Publication date: September 22, 2022Inventor: Tetsuya OHMI
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Publication number: 20220301960Abstract: A sensor device includes: a first sensor element; a second sensor element; and a processing chip that includes a semiconductor substrate, a first processor that receives a first detection signal and processes the first detection signal, a second processor that receives the second detection signal and processes the second detection signal, and an isolation portion that electrically isolates the first processor the second processor. The first processor includes a first diagnosis unit that self-diagnoses a presence or absence of a failure. The second processor includes a second diagnosis unit that self-diagnoses a presence or absence of a failure. The processing chip identifiably outputs a first output of the first processor and a second output of the second processor.Type: ApplicationFiled: June 9, 2022Publication date: September 22, 2022Inventor: Tetsuya OHMI
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Publication number: 20220301962Abstract: A sensor device includes: a first sensor element; a second sensor element; and a processing chip that includes a semiconductor substrate, a first processor that receives a first detection signal and processes the first detection signal, a second processor that receives the second detection signal and processes the second detection signal, and an isolation portion that electrically isolates the first processor the second processor. The first processor includes a first diagnosis unit that self-diagnoses a presence or absence of a failure. The second processor includes a second diagnosis unit that self-diagnoses a presence or absence of a failure. The processing chip identifiably outputs a first output of the first processor and a second output of the second processor.Type: ApplicationFiled: June 9, 2022Publication date: September 22, 2022Inventor: Tetsuya Ohmi
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Patent number: 11373917Abstract: A sensor device includes: a first sensor element; a second sensor element; and a processing chip that includes a semiconductor substrate, a first processor that receives a first detection signal and processes the first detection signal, a second processor that receives the second detection signal and processes the second detection signal, and an isolation portion that electrically isolates the first processor the second processor. The first processor includes a first diagnosis unit that self-diagnoses a presence or absence of a failure. The second processor includes a second diagnosis unit that self-diagnoses a presence or absence of a failure. The processing chip identifiably outputs a first output of the first processor and a second output of the second processor.Type: GrantFiled: June 24, 2020Date of Patent: June 28, 2022Assignee: DENSO CORPORATIONInventor: Tetsuya Ohmi
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Patent number: 11099034Abstract: 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.Type: GrantFiled: November 27, 2019Date of Patent: August 24, 2021Assignee: DENSO CORPORATIONInventors: Yasuhiro Kitaura, Atsushi Kobayashi, Michihiro Makita, Akito Sasaki, Tetsuya Ohmi
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Patent number: 11041739Abstract: 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.Type: GrantFiled: May 23, 2019Date of Patent: June 22, 2021Assignee: DENSO CORPORATIONInventors: Tetsuya Ohmi, Michihiro Makita
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Publication number: 20200411401Abstract: A sensor device includes: a first sensor element; a second sensor element; and a processing chip that includes a semiconductor substrate, a first processor that receives a first detection signal and processes the first detection signal, a second processor that receives the second detection signal and processes the second detection signal, and an isolation portion that electrically isolates the first processor the second processor. The first processor includes a first diagnosis unit that self-diagnoses a presence or absence of a failure. The second processor includes a second diagnosis unit that self-diagnoses a presence or absence of a failure. The processing chip identifiably outputs a first output of the first processor and a second output of the second processor.Type: ApplicationFiled: June 24, 2020Publication date: December 31, 2020Inventor: Tetsuya OHMI
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Publication number: 20200096368Abstract: 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.Type: ApplicationFiled: November 27, 2019Publication date: March 26, 2020Inventors: Atsushi KOBAYASHI, Yasuhiro KITAURA, Michihiro MAKITA, Akito SASAKI, Tetsuya OHMI
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Publication number: 20200096367Abstract: 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.Type: ApplicationFiled: November 27, 2019Publication date: March 26, 2020Inventors: Yasuhiro KITAURA, Atsushi KOBAYASHI, Michihiro MAKITA, Akito SASAKI, Tetsuya OHMI
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Publication number: 20200072593Abstract: 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.Type: ApplicationFiled: November 7, 2019Publication date: March 5, 2020Inventors: Atsushi KOBAYASHI, Yasuhiro KITAURA, Michihiro MAKITA, Akito SASAKI, Tetsuya OHMI
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Publication number: 20200072863Abstract: 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.Type: ApplicationFiled: November 8, 2019Publication date: March 5, 2020Inventors: Akito SASAKI, Atsushi KOBAYASHI, Michihiro MAKITA, Tetsuya OHMI
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Publication number: 20190277666Abstract: 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.Type: ApplicationFiled: May 23, 2019Publication date: September 12, 2019Inventors: Tetsuya OHMI, Michihiro MAKITA
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Patent number: 10001503Abstract: A rotation sensor has a magnetoelectric conversion unit that converts change of magnetic flux whose direction changes periodically with rotation of a rotator into an electric signal and a processing unit that processes the electric signal. The magnetoelectric conversion unit outputs a first detection signal and a second detection signal. The processing unit has a first comparison unit that compares a detection threshold and the first detection signal and a second comparison unit that compares a reference threshold and the second detection signal. The first comparison unit changes a voltage level of the detection threshold when the first detection signal exceeds or falls below the detection threshold and then restores the voltage level of the detection threshold based on the second detection signal and the reference threshold, and the first comparison unit converts the first detection signal into a pulse signal based on the detection threshold of the same voltage level.Type: GrantFiled: July 14, 2014Date of Patent: June 19, 2018Assignee: DENSO CORPORATIONInventor: Tetsuya Ohmi