Patents by Inventor Takeshi Musha
Takeshi Musha 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: 11933640Abstract: A magnetic linear position detector includes a stator and a mover that is movable along a first direction with respect to the stator. One of the stator and the mover includes a magnetic detector, and the other of the stator and the mover includes a magnet. The magnet has a first face facing the magnetic detector, and the first face is provided alternately with N poles and S poles along the first direction. The magnet includes a first region and a second region provided on each side of the first region along the first direction. In the first region, a length along a second direction perpendicular to the first face is constant. In the second region, a length along the second direction is different from the length in the first region.Type: GrantFiled: March 10, 2020Date of Patent: March 19, 2024Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Takeshi Musha, Yoshinao Tatei, Hisanori Torii, Makoto Higashino
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Patent number: 11913813Abstract: A power generation element includes a magnetic member that produces a large Barkhausen effect and magnetism collection members including an insertion part having the magnetic member inserted therethrough. The magnetism collection member includes a first component on an opposite side of a boundary plane to a magnetic field generation unit and a second component on the same side of the boundary plane as the magnetic field generation unit, the boundary plane passing through a center of an imaginary circle inscribed in the insertion part and having a diameter equal to a length of the insertion part in a third direction perpendicular to first and second directions, the first direction is a direction of the insertion of the magnetic member, and the second direction is a direction in which the magnetic field generation unit is disposed. A volume of the second component is larger than a volume of the first component.Type: GrantFiled: December 27, 2021Date of Patent: February 27, 2024Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yoshitomo Nakamura, Yoshinori Miyamoto, Shinichiro Yoshida, Hisanori Torii, Takeshi Musha, Masanori Nimura, Shizuka Ueda, Takuya Noguchi, Toshio Mekata, Yuji Kubo, Hitoshi Hasegawa
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Publication number: 20230417577Abstract: An environmental power generation device outputs power generation charges to a power supply line to which a capacitor is connected. When a power generation voltage corresponding to a charging voltage for the capacitor is equal to or higher than an power-on criterion voltage, a voltage comparison circuit outputs a voltage detection signal. An internal circuit of a semiconductor device is powered on in response to the voltage detection signal. A setting change circuit switches the power-on criterion voltage in accordance with a setting input.Type: ApplicationFiled: November 4, 2020Publication date: December 28, 2023Applicant: Mitsubishi Electric CorporationInventors: Akio KAMIMURAI, Takeshi MUSHA
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Publication number: 20230392962Abstract: A power generation element includes a magnetic member that produces a large Barkhausen effect and magnetism collection members including an insertion part having the magnetic member inserted therethrough. The magnetism collection member includes a first component on an opposite side of a boundary plane to a magnetic field generation unit and a second component on the same side of the boundary plane as the magnetic field generation unit, the boundary plane passing through a center of an imaginary circle inscribed in the insertion part and having a diameter equal to a length of the insertion part in a third direction perpendicular to first and second directions, the first direction is a direction of the insertion of the magnetic member, and the second direction is a direction in which the magnetic field generation unit is disposed. A volume of the second component is larger than a volume of the first component.Type: ApplicationFiled: December 27, 2021Publication date: December 7, 2023Applicant: Mitsubishi Electric CorporationInventors: Yoshitomo NAKAMURA, Yoshinori MIYAMOTO, Shinichiro YOSHIDA, Hisanori TORII, Takeshi MUSHA, Masanori NIMURA, Shizuka UEDA, Takuya NOGUCHI, Toshio MEKATA, Yuji KUBO, Hitoshi HASEGAWA
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Publication number: 20230068474Abstract: The present disclosure includes: a magnetic member configured to cause a large Barkhausen effect; a power generation coil disposed so as to be wound around the magnetic member; and soft magnetic members formed at both end portions of the magnetic member so as to be in contact with the magnetic member and so as to press the magnetic member. Consequently, evenness of a magnetic flux density inside the magnetic member is increased, and the large Barkhausen effect is stably caused, whereby a highly stable power generation element is obtained.Type: ApplicationFiled: March 23, 2021Publication date: March 2, 2023Applicant: Mitsubishi Electric CorporationInventors: Yoshitomo NAKAMURA, Shinichiro YOSHIDA, Hisanori TORII, Masanori NIMURA, Shizuka UEDA, Yuji KUBO, Takuya NOGUCHI, Akira YOKOYAMA, Takeshi MUSHA, Yoshinori MIYAMOTO
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Publication number: 20230049222Abstract: A magnetic linear position detector includes a stator and a mover that is movable along a first direction with respect to the stator. One of the stator and the mover is provided with a magnetic detector. The other of the stator and the mover is provided with a magnet having a first face facing the magnetic detector. The first face is magnetized in such a manner that a magnetization direction changes in an arc shape around a magnetization center point. The magnetic detector is an element whose output changes depending on a direction of a magnetic field.Type: ApplicationFiled: March 10, 2020Publication date: February 16, 2023Applicant: Mitsubishi Electric CorporationInventors: Makoto HIGASHINO, Takeshi MUSHA, Yoshinao TATEI, Hisanori TORII
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Publication number: 20230033559Abstract: A magnetic linear position detector includes a stator and a mover that is movable along a first direction with respect to the stator. One of the stator and the mover includes a magnetic detector, and the other of the stator and the mover includes a magnet. The magnet has a first face facing the magnetic detector, and the first face is provided alternately with N poles and S poles along the first direction. The magnet includes a first region and a second region provided on each side of the first region along the first direction. In the first region, a length along a second direction perpendicular to the first face is constant. In the second region, a length along the second direction is different from the length in the first region.Type: ApplicationFiled: March 10, 2020Publication date: February 2, 2023Applicant: Mitsubishi Electric CorporationInventors: Takeshi MUSHA, Yoshinao TATEI, Hisanori TORII, Makoto HIGASHINO
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Patent number: 11221231Abstract: An encoder includes a magnetic sensor having higher detection sensitivity to a magnetic field applied in a reading direction, while having lower detection sensitivity to a magnetic field applied in a direction forming a greater angle with respect to the reading direction, an encoder substrate having the magnetic sensor mounted thereon, a magnetic shield to shield against a magnetic field including a side portion covering sides of the magnetic sensor and a top-side portion covering a top of the magnetic sensor, a permanent magnet located to face the encoder substrate, a shaft having the permanent magnet attached to a tip end of the shaft, and a bracket to support the shaft in a rotatable manner, wherein on the side portion of the magnetic shield, a notch as a connector insertion portion is located not to overlap an extended area of the magnetic sensor in the reading direction.Type: GrantFiled: May 23, 2018Date of Patent: January 11, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Hisanori Torii, Takuya Noguchi, Daisuke Kanamori, Takeshi Musha, Fumiaki Tsuchiya, Yasuhiro Kitayama
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Publication number: 20210231462Abstract: An encoder includes a magnetic sensor having higher detection sensitivity to a magnetic field applied in a reading direction, while having lower detection sensitivity to a magnetic field applied in a direction forming a greater angle with respect to the reading direction, an encoder substrate having the magnetic sensor mounted thereon, a magnetic shield to shield against a magnetic field including a side portion covering sides of the magnetic sensor and a top-side portion covering a top of the magnetic sensor, a permanent magnet located to face the encoder substrate, a shaft having the permanent magnet attached to a tip end of the shaft, and a bracket to support the shaft in a rotatable manner, wherein on the side portion of the magnetic shield, a notch as a connector insertion portion is located not to overlap an extended area of the magnetic sensor in the reading direction.Type: ApplicationFiled: May 23, 2018Publication date: July 29, 2021Applicant: Mitsubishi Electric CorporationInventors: Hisanori TORII, Takuya NOGUCHI, Daisuke KANAMORI, Takeshi MUSHA, Fumiaki TSUCHIYA, Yasuhiro KITAYAMA
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Patent number: 9891075Abstract: To provide a magnetic encoder in which a base material has a ring-shaped body portion into which a rotation axis is inserted when a magnetic drum is mounted on a rotation axis, and an engagement convex portion provided so as to project over a whole circumference of an outer periphery of the body portion. The body portion has a centering track provided in a part of the outer periphery of the body portion over the whole circumference as a reference of circular runout tolerance on an outer periphery of a magnet. The engagement convex portion has a constricted portion projecting from the outer periphery of the body portion, and a cylindrical portion extending in an axial direction of the body portion from a tip end of the constricted portion. The magnet surrounds the engagement convex portion so as to wrap around to a gap between the cylindrical portion and the body portion, and exposes the centering track without covering the centering track.Type: GrantFiled: February 6, 2014Date of Patent: February 13, 2018Assignee: Mitsubishi Electric CorporationInventors: Takumi Asano, Taizo Iwami, Takashi Tamura, Takeshi Musha
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Patent number: 9869565Abstract: A magnet for detection mounted on a rotating shaft rotating about a rotation axis, and a detector disposed opposite to the magnet for detection to detect rotation of the rotating shaft are included. The detector includes a multi-layer circuit board, a recessed groove that is provided in an interlayer of the circuit board, has a center on an extension of the rotation axis, and is orthogonal to the rotation axis, a combined magnetic wire incorporated in the recessed groove and exhibiting a large Barkhausen effect, and a pickup coil formed of wiring conductors on the circuit board and a conductor with which through holes are filled, to surround the combined magnetic wire.Type: GrantFiled: April 23, 2015Date of Patent: January 16, 2018Assignee: Mitsubishi Electric CorporationInventors: Takeshi Musha, Yoshinao Tatei, Yoshimasa Watanabe
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Patent number: 9792688Abstract: To obtain a position detection device capable of detecting highly accurate and robust position by suppressing affect of error detection of an edge, provided is a configuration for performing a validity determination of edges detected by binarizing an image signal (21) converted by a light-receiving element (3) for receiving light irradiated from a light source (1) toward a scale (2) having a code pattern, and performing position detection after removing the edges determined to be invalid as edges that have been affected by foreign matter and the like among the edges on which the validity determination has been performed.Type: GrantFiled: October 2, 2015Date of Patent: October 17, 2017Assignees: Mitsubishi Electric Corporation, Mitsubishi Electric Research Laboratories, Inc.Inventors: Osamu Nasu, Haruhiko Takeyama, Toru Sasaki, Takuya Noguchi, Hajime Nakajima, Yoshinao Tatei, Shigenori Takeda, Takeshi Musha, Amit Agrawal, Jay E. Thornton
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Publication number: 20170227380Abstract: A magnet for detection mounted on a rotating shaft rotating about a rotation axis, and a detector disposed opposite to the magnet for detection to detect rotation of the rotating shaft are included. The detector includes a multi-layer circuit board, a recessed groove that is provided in an interlayer of the circuit board, has a center on an extension of the rotation axis, and is orthogonal to the rotation axis, a combined magnetic wire incorporated in the recessed groove and exhibiting a large Barkhausen effect, and a pickup coil formed of wiring conductors on the circuit board and a conductor with which through holes are filled, to surround the combined magnetic wire.Type: ApplicationFiled: April 23, 2015Publication date: August 10, 2017Applicant: Mitsubishi Electric CorporationInventors: Takeshi MUSHA, Yoshinao TATEI, Yoshimasa WATANABE
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Patent number: 9702735Abstract: Provided is a magnetic rotation-angle detector that includes a disk-shaped magnet that is magnetized so as to change magnetic poles n times per rotation (where n is an integer equal to or larger than 1); a magnetic-body slit plate that is rotated together with the magnet, where a part having a high magnetic flux permeability and a part having a low magnetic flux permeability are alternately and repeatedly arranged thereon so as to change the magnetic flux permeability m times per rotation (where m is an integer equal to or larger than 2 and m>n); a magnetic sensor that detects magnetism from the magnet when the magnet has passed by through the magnetic-body slit plate; and a calculation unit that obtains the rotation angle of the magnet from the output from the magnetic sensor.Type: GrantFiled: May 21, 2013Date of Patent: July 11, 2017Assignee: Mitsubishi Electric CorporationInventors: Takeshi Musha, Jin Inoue, Hajime Nakajima, Takashi Okamuro
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Patent number: 9664535Abstract: A rotation number detector according to an embodiment is a rotation number detector that detects the number of rotations of a magnet attached to a rotating body by using a power generation unit. The power generation unit includes N (N is a natural number equal to or larger than 1) power generation elements, each including a magnetic wire in which magnetization reversal occurs due to a large Barkhausen effect and a pickup coil that is wound around the magnetic wire. The magnetic wire is longer than a wound portion of the pickup coil in an extension direction of the magnetic wire of the power generation elements. The magnetic wire is set above a rotation center of the magnet.Type: GrantFiled: February 22, 2013Date of Patent: May 30, 2017Assignee: Mitsubishi Electric CorporationInventors: Yoshinao Tatei, Takeshi Musha, Hajime Nakajima, Takashi Okamuro, Masanori Nimura
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Patent number: 9631953Abstract: A rotation number detector according to an embodiment is a rotation number detector that detects the number of rotations of a magnet attached to a rotating body by using a power generation unit. The power generation unit includes N (N is a natural number equal to or larger than 1) power generation elements, each including a magnetic wire in which magnetization reversal occurs due to a large Barkhausen effect and a pickup coil that is wound around the magnetic wire. The magnetic wire is longer than a wound portion of the pickup coil in an extension direction of the magnetic wire of the power generation elements. The magnetic wire is set above a rotation center of the magnet.Type: GrantFiled: February 22, 2013Date of Patent: April 25, 2017Assignee: Mitsubishi Electric CorporationInventors: Yoshinao Tatei, Takeshi Musha, Hajime Nakajima, Takashi Okamuro, Masanori Nimura
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Publication number: 20170098306Abstract: To obtain a position detection device capable of detecting highly accurate and robust position by suppressing affect of error detection of an edge, provided is a configuration for performing a validity determination of edges detected by binarizing an image signal (21) converted by a light-receiving element (3) for receiving light irradiated from a light source (1) toward a scale (2) having a code pattern, and performing position detection after removing the edges determined to be invalid as edges that have been affected by foreign matter and the like among the edges on which the validity determination has been performed.Type: ApplicationFiled: October 2, 2015Publication date: April 6, 2017Applicants: MITSUBISHI ELECTRIC CORPORATION, MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.Inventors: OSAMU NASU, HARUHIKO TAKEYAMA, TORU SASAKI, TAKUYA NOGUCHI, HAJIME NAKAJIMA, YOSHINAO TATEI, SHIGENORI TAKEDA, TAKESHI MUSHA, AMIT AGRAWAL, JAY E. THORNTON
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Patent number: 9605981Abstract: Provided is an absolute encoder capable of detecting the absolute angle at high resolution and with high precision. An image sensor receives light in an absolute value code pattern of a scale, an edge detecting unit detects from the received light signal an edge pixel position and an edge direction, and an edge position correcting unit corrects the edge pixel position based on the edge direction. A phase detecting unit detects from the corrected edge pixel position the phase shift amount of a shift from a reference pixel position of the image sensor, and a high precision detection unit uses a rough absolute position detected by a rough detection unit and the phase shift amount detected by the phase detecting unit to detect the absolute position with high precision.Type: GrantFiled: September 22, 2015Date of Patent: March 28, 2017Assignees: MITSUBISHI ELECTRIC CORPORATION, Mitsubishi Electric Research Laboratories, Inc.Inventors: Takuya Noguchi, Osamu Nasu, Hajime Nakajima, Haruhiko Takeyama, Toru Sasaki, Makito Seki, Yoshinao Tatei, Shigenori Takeda, Takeshi Musha, Jay E. Thornton, Amit Agrawal
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Publication number: 20170082463Abstract: Provided is an absolute encoder capable of detecting the absolute angle at high resolution and with high precision. An image sensor receives light in an absolute value code pattern of a scale, an edge detecting unit detects from the received light signal an edge pixel position and an edge direction, and an edge position correcting unit corrects the edge pixel position based on the edge direction. A phase detecting unit detects from the corrected edge pixel position the phase shift amount of a shift from a reference pixel position of the image sensor, and a high precision detection unit uses a rough absolute position detected by a rough detection unit and the phase shift amount detected by the phase detecting unit to detect the absolute position with high precision.Type: ApplicationFiled: September 22, 2015Publication date: March 23, 2017Applicants: Mitsubishi Electric Corporation, Mitsubishi Electric Research Laboratories, Inc.Inventors: Takuya NOGUCHI, Osamu NASU, Hajime NAKAJIMA, Haruhiko TAKEYAMA, Toru SASAKI, Makito SEKI, Yoshinao TATEI, Shigenori TAKEDA, Takeshi MUSHA, Jay E. THORNTON, Amit AGRAWAL
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Publication number: 20160025516Abstract: To provide a magnetic encoder in which a base material has a ring-shaped body portion into which a rotation axis is inserted when a magnetic drum is mounted on a rotation axis, and an engagement convex portion provided so as to project over a whole circumference of an outer periphery of the body portion. The body portion has a centering track provided in a part of the outer periphery of the body portion over the whole circumference as a reference of circular runout tolerance on an outer periphery of a magnet. The engagement convex portion has a constricted portion projecting from the outer periphery of the body portion, and a cylindrical portion extending in an axial direction of the body portion from a tip end of the constricted portion. The magnet surrounds the engagement convex portion so as to wrap around to a gap between the cylindrical portion and the body portion, and exposes the centering track without covering the centering track.Type: ApplicationFiled: February 6, 2014Publication date: January 28, 2016Applicant: Mitsubishi Electric CorporationInventors: Takumi ASANO, Taizo IWAMI, Takashi TAMURA, Takeshi MUSHA