Patents by Inventor Ryuji Hokari
Ryuji Hokari 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: 11781927Abstract: A torque sensor which can improve detection accuracy is provided. The torque sensor includes a first structure, a second structure, a third structure provided between the first structure and the second structure and at least two sensor portions provided between the first structure and the second structure, and a stiffness of one of the first structure and the second structure, closer to the sensor portions is higher than that of the other one.Type: GrantFiled: January 12, 2021Date of Patent: October 10, 2023Assignee: NIDEC COPAL ELECTRONICS CORPORATIONInventors: Keiya Hoshino, Takayuki Endo, Ryuji Hokari
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Publication number: 20210131891Abstract: A torque sensor which can improve detection accuracy is provided. The torque sensor includes a first structure, a second structure, a third structure provided between the first structure and the second structure and at least two sensor portions provided between the first structure and the second structure, and a stiffness of one of the first structure and the second structure, closer to the sensor portions is higher than that of the other one.Type: ApplicationFiled: January 12, 2021Publication date: May 6, 2021Applicant: NIDEC COPAL ELECTRONICS CORPORATIONInventors: Keiya HOSHINO, Takayuki ENDO, Ryuji HOKARI
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Patent number: 9958514Abstract: A magnetic field measurement apparatus includes a first gas cell disposed in a +z direction when seen from an object to be measured, a second gas cell disposed in the +z direction when seen from the first gas cell, a first measurement unit which measures a component of a magnetic field in the first gas cell, a second measurement unit which measures a component of a magnetic field in the second gas cell, a magnetic field generation unit which generates the magnetic field toward the second gas cell so as to reduce the component measured by the second measurement unit, and an output unit which outputs a signal in response to the difference in the components respectively measured by the first measurement unit and second measurement unit.Type: GrantFiled: January 22, 2015Date of Patent: May 1, 2018Assignee: Seiko Epson CorporationInventor: Ryuji Hokari
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Patent number: 9642553Abstract: A magnetic field measuring apparatus includes a cell array which includes plural cells different in size of detection surface through which a magnetic flux passes when the cells are arranged in a magnetic field of a measurement object, a medium which is enclosed inside each of the plural cells and rotates a light polarization plane according to an intensity of the magnetic field, an irradiator to irradiate a light to the detection surface of each of the cells, and a detector to detect a rotation angle of a polarization plane of the light passing through each of the cells.Type: GrantFiled: December 12, 2012Date of Patent: May 9, 2017Assignee: Seiko Epson CorporationInventor: Ryuji Hokari
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Publication number: 20160360987Abstract: A magnetic field measurement apparatus includes a magnetic sensor that detects a magnetic field from a subject, a table on which the subject is mounted, a shape measurement device that measures a surface shape of the subject, an average plane calculation unit that calculates an average plane of the surface shape, and a control unit that controls the table so that an opposing surface of the magnetic sensor is parallel to the average plane.Type: ApplicationFiled: June 2, 2016Publication date: December 15, 2016Applicant: SEIKO EPSON CORPORATIONInventors: Mitsutoshi MIYASAKA, Toshihiro SAITO, Akihiro DEGUCHI, Ryuji HOKARI
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Patent number: 9462733Abstract: A magnetic shielding apparatus includes: a passive shield; a correction target space that is defined in the interior of the passive shield; external coils as a first coil that corrects a magnetic field in the passive shield; a first magnetic sensor; a second magnetic sensor that is arranged more inside the passive shield than the first magnetic sensor; and a control unit. The first magnetic sensor and the second magnetic sensor measure a magnetic field gradient in the passive shield. The control unit controls the external coils based on a result of the measurement performed by the first magnetic sensor and the second magnetic sensor.Type: GrantFiled: September 10, 2014Date of Patent: October 4, 2016Assignee: Seiko Epson CorporationInventor: Ryuji Hokari
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Patent number: 9451734Abstract: A magnetic shielding device includes: a passive shield having an inner space; a first coil that cancels a magnetic field entering in the inner space; a first magnetic sensor that measures the magnetic field entering in the inner space; a second magnetic sensor located in a position farther from the first coil than the first magnetic sensor; and a controller that controls the first coil so that a gradient between a first magnetic field measured by the first magnetic sensor and a second magnetic field measured by the second magnetic sensor be less than a predetermined threshold.Type: GrantFiled: September 17, 2013Date of Patent: September 20, 2016Assignee: Seiko Epson CorporationInventors: Fumihiko Onuma, Shigemitsu Toda, Ryuji Hokari
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Publication number: 20160228055Abstract: In an electronic apparatus, a contact thermometer contacts a skin surface of a user and measures a first temperature of the skin surface. A radiation thermometer measures a second temperature of the skin surface of the user. A vaporization heat quantity calculating unit calculates a quantity of heat of vaporization, using the first temperature and the second temperature. The calculation of the quantity of heat of vaporization is performed by executing predetermined vaporization heat quantity computing processing in which the first temperature and the second temperature are variables.Type: ApplicationFiled: February 2, 2016Publication date: August 11, 2016Applicant: SEIKO EPSON CORPORATIONInventors: Akira IKEDA, Ryuji HOKARI
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Publication number: 20150130457Abstract: A magnetic field measurement apparatus includes a first gas cell disposed in a +z direction when seen from an object to be measured, a second gas cell disposed in the +z direction when seen from the first gas cell, a first measurement unit which measures a component of a magnetic field in the first gas cell, a second measurement unit which measures a component of a magnetic field in the second gas cell, a magnetic field generation unit which generates the magnetic field toward the second gas cell so as to reduce the component measured by the second measurement unit, and an output unit which outputs a signal in response to the difference in the components respectively measured by the first measurement unit and second measurement unit.Type: ApplicationFiled: January 22, 2015Publication date: May 14, 2015Inventor: Ryuji HOKARI
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Patent number: 9024634Abstract: A magnetic field measurement apparatus includes a first gas cell disposed in a +z direction when seen from an object to be measured, a second gas cell disposed in the +z direction when seen from the first gas cell, a first measurement unit which measures a component of a magnetic field in the first gas cell, a second measurement unit which measures a component of a magnetic field in the second gas cell, a magnetic field generation unit which generates the magnetic field toward the second gas cell so as to reduce the component measured by the second measurement unit, and an output unit which outputs a signal in response to the difference in the components respectively measured by the first measurement unit and second measurement unit.Type: GrantFiled: March 30, 2012Date of Patent: May 5, 2015Assignee: Seiko Epson CorporationInventor: Ryuji Hokari
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Publication number: 20150069846Abstract: A magnetic shielding apparatus includes: a passive shield; a correction target space that is defined in the interior of the passive shield; external coils as a first coil that corrects a magnetic field in the passive shield; a first magnetic sensor; a second magnetic sensor that is arranged more inside the passive shield than the first magnetic sensor; and a control unit. The first magnetic sensor and the second magnetic sensor measure a magnetic field gradient in the passive shield. The control unit controls the external coils based on a result of the measurement performed by the first magnetic sensor and the second magnetic sensor.Type: ApplicationFiled: September 10, 2014Publication date: March 12, 2015Inventor: Ryuji HOKARI
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Publication number: 20140077612Abstract: A magnetic shielding device includes: a passive shield having an inner space; a first coil that cancels a magnetic field entering in the inner space; a first magnetic sensor that measures the magnetic field entering in the inner space; a second magnetic sensor located in a position farther from the first coil than the first magnetic sensor; and a controller that controls the first coil so that a gradient between a first magnetic field measured by the first magnetic sensor and a second magnetic field measured by the second magnetic sensor be less than a predetermined threshold.Type: ApplicationFiled: September 17, 2013Publication date: March 20, 2014Applicant: Seiko Epson CorporationInventors: Fumihiko Onuma, Shigemitsu Toda, Ryuji Hokari
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Patent number: 8362762Abstract: A magnetic field measurement device includes: a magneto-optical sensor that measures a first axial component of a magnetic field in the direction of a first axis that is arbitrarily set in the magnetic field that is to be measured; and a second magneto-optical sensor that measures a second axial component of the magnetic field in the direction of a second axis that form an angle q (0<q<90°) with the first axis.Type: GrantFiled: March 16, 2010Date of Patent: January 29, 2013Assignee: Seiko Epson CorporationInventor: Ryuji Hokari
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Publication number: 20120249132Abstract: A magnetic field measurement apparatus includes a first gas cell disposed in a +z direction when seen from an object to be measured, a second gas cell disposed in the +z direction when seen from the first gas cell, a first measurement unit which measures a component of a magnetic field in the first gas cell, a second measurement unit which measures a component of a magnetic field in the second gas cell, a magnetic field generation unit which generates the magnetic field toward the second gas cell so as to reduce the component measured by the second measurement unit, and an output unit which outputs a signal in response to the difference in the components respectively measured by the first measurement unit and second measurement unit.Type: ApplicationFiled: March 30, 2012Publication date: October 4, 2012Applicant: SEIKO EPSON CORPORATIONInventor: Ryuji HOKARI
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Publication number: 20100237858Abstract: A magnetic field measurement device includes: a magneto-optical sensor that measures a first axial component of a magnetic field in the direction of a first axis that is arbitrarily set in the magnetic field that is to be measured; and a second magneto-optical sensor that measures a second axial component of the magnetic field in the direction of a second axis that form an angle q (0<q<90°) with the first axis.Type: ApplicationFiled: March 16, 2010Publication date: September 23, 2010Applicant: SEIKO EPSON CORPORATIONInventor: Ryuji HOKARI