Patents by Inventor Tatsuakira Masaki
Tatsuakira Masaki 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: 10227058Abstract: One aspect of the present invention is a vehicle state monitoring device including: a transmission unit configured to wirelessly transmit a state signal providing a notification of a vehicle state; a power generator fixed to the vehicle body, and comprising a vibration power generation element configured to perform vibration power generation by vibration from the vehicle body; and a controller configured to start up the transmission unit when power generated by the vibration power generation is supplied from the power generator, and configured to wirelessly transmit the state signal to the transmission unit.Type: GrantFiled: November 17, 2015Date of Patent: March 12, 2019Assignee: OMRON CorporationInventor: Tatsuakira Masaki
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Patent number: 10181805Abstract: Power generated by a vibration power generator utilizing an electret is efficiently supplied to a power supply load. A vibration power generator includes a first substrate and a second substrate configured to be moved relative to each other by external vibration while remaining opposite each other, a group of a plurality of electrets arranged in the relative movement direction on one surface side of the first substrate, and a group of electrodes arranged in the relative movement direction on a surface side of the second substrate opposite to the group of electrets, and including a first current collecting electrode and a second current collecting electrode. A power supply load to which power generated by the external vibration is supplied and which has an impedance lower than an internal impedance of the vibration power generator is electrically connected to each of the first and second current collecting electrodes.Type: GrantFiled: June 19, 2013Date of Patent: January 15, 2019Assignee: OMRON CorporationInventors: Misato Nabeto, Tatsuakira Masaki, Keiki Matsuura
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Publication number: 20180251097Abstract: One aspect of the present invention is a vehicle state monitoring device including: a transmission unit configured to wirelessly transmit a state signal providing a notification of a vehicle state; a power generator fixed to the vehicle body, and comprising a vibration power generation element configured to perform vibration power generation by vibration from the vehicle body; and a controller configured to start up the transmission unit when power generated by the vibration power generation is supplied from the power generator, and configured to wirelessly transmit the state signal to the transmission unit.Type: ApplicationFiled: November 17, 2015Publication date: September 6, 2018Applicant: OMRON CorporationInventor: Tatsuakira MASAKI
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Patent number: 9964434Abstract: An electret type vibration detection system has a vibration-powered generator that performs vibration-induced power generation by displacing on a basis of external vibration an electret group formed of a plurality of electrets and an electrode group having a plurality of electrode pairs in a relative movement direction to output a vibration-induced voltage between electrodes of the electrode pair, and a transfer function memory section that stores transfer function information that defines a correlation between a vibration velocity of the external vibration and an output power voltage of the vibration-powered generator in a range of a predetermined frequency included in the external vibration, wherein the transfer function information contains a transfer coefficient set according to each of a plurality of frequencies belonging to the predetermined frequency range to place the vibration velocity of the external vibration and the output power voltage of the vibration-powered generator in a predetermined proportType: GrantFiled: February 28, 2013Date of Patent: May 8, 2018Assignees: OMRON Corporation, Tokyo Institute of TechnologyInventors: Tatsuakira Masaki, Shinichi Nakao, Hideshi Nishida, Eiichi Sasaki, Hiroshi Yamaguchi
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Patent number: 9793828Abstract: Power generated by a vibration power generator using an electret is efficiently supplied to a power supply load. A vibration power generator includes a first substrate and a second substrate configured to be moved relative to each other by external vibration while remaining opposite each other, a group of a plurality of electrets arranged in the relative movement direction on one surface side of the first substrate, and a group of a plurality of electrodes arranged in the relative movement direction on a surface side of the second substrate opposite to the group of electrets, the group of electrodes including first current collecting electrodes and second current collecting electrodes electrically connected to respective power supply loads to which power generated by the external vibration is supplied, and ground electrodes each provided between the first current collecting electrode and the second current collecting electrode and grounded.Type: GrantFiled: June 19, 2013Date of Patent: October 17, 2017Assignee: OMRON CorporationInventors: Tatsuakira Masaki, Misato Nabeto, Keiki Matsuura
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Patent number: 9780696Abstract: A vibration power generator configured to generate power by displacement between an electret group having a plurality of electrets and an electrode group having a plurality of electrodes in a relative movement direction in response to an external vibration, includes a casing in which the electret group and the electrode group are disposed, a fixed member in which one of the electret group and the electrode group is disposed, the fixed member being fixed to a side of the casing, and a movable member in which the other of the electret group and the electrode group is disposed. The movable member is disposed in the casing such that the movable member is relatively movable in response to the external vibration while opposed to the fixed member.Type: GrantFiled: February 8, 2013Date of Patent: October 3, 2017Assignee: OMRON CorporationInventors: Misato Nabeto, Masayo Ikuta, Tatsuakira Masaki
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Patent number: 9507370Abstract: A voltage conversion circuit has a plurality of primary capacitors charged by a power supply, a secondary capacitor connected in parallel to the respective plurality of primary capacitors that is charged at a voltage supplied to a load circuit, a plurality of switching circuits provided in association with the respective plurality of primary capacitors that change over a connection state between the primary capacitors and the secondary capacitor, and a connection control circuit that successively connects the respective primary capacitors to the secondary capacitor through the corresponding switching circuits, the respective primary capacitors across which the charging voltages reach a predetermined connection voltage higher than a charging voltage across the secondary capacitor.Type: GrantFiled: August 28, 2012Date of Patent: November 29, 2016Assignee: OMRON CorporationInventors: Hiroshi Sameshima, Misato Nabeto, Tatsuakira Masaki, Hiroshi Tsuji
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Patent number: 9143050Abstract: A voltage converting circuit includes a plurality of first capacitors that are charged by a power source, a second capacitor, connected in parallel to the plurality of first capacitors, which is able to be charged to a voltage that is supplied to a load circuit, and a plurality of switching circuits, provided in such a way as to correspond to the plurality of first capacitors, each of which switches states of connection between its corresponding first capacitor and the second capacitor. The first capacitors are sequentially connected to the second capacitor through the corresponding switching circuits as charging voltages of the first capacitors reach a predetermined connection voltage that is higher than a charging voltage of the second capacitor so that the first capacitors are not short-circuited with each other.Type: GrantFiled: March 16, 2011Date of Patent: September 22, 2015Assignee: OMRON CorporationInventors: Misato Nabeto, Kenji Sakurrai, Tatsuakira Masaki, Hiroshi Sameshima, Hiroshi Tsuji
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Patent number: 9134168Abstract: A vibration sensor has a first substrate, a second substrate relatively movable by an external vibration while opposed to the first substrate, an electret group having a plurality of electrets that are arrayed in a relative movement direction on a side of one of surfaces of the first substrate, and an electrode group having a plurality of electrodes that are arrayed in the relative movement direction on a side of a surface of the second substrate. The surface of the second substrate is opposed to the electret group. A positional relationship between the electret group and the electrode group changes with a relative change in position of the first and second substrates by the external vibration to output an external vibration detection signal.Type: GrantFiled: August 16, 2012Date of Patent: September 15, 2015Assignee: OMRON CorporationInventors: Tatsuakira Masaki, Toru Yokoyama, Keiki Matsuura
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Publication number: 20150145333Abstract: Power generated by a vibration power generator using an electret is efficiently supplied to a power supply load. A vibration power generator includes a first substrate and a second substrate configured to be moved relative to each other by external vibration while remaining opposite each other, a group of a plurality of electrets arranged in the relative movement direction on one surface side of the first substrate, and a group of a plurality of electrodes arranged in the relative movement direction on a surface side of the second substrate opposite to the group of electrets, the group of electrodes including first current collecting electrodes and second current collecting electrodes electrically connected to respective power supply loads to which power generated by the external vibration is supplied, and ground electrodes each provided between the first current collecting electrode and the second current collecting electrode and grounded.Type: ApplicationFiled: June 19, 2013Publication date: May 28, 2015Inventors: Tatsuakira Masaki, Misato Nabeto, Keiki Matsuura
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Publication number: 20150149123Abstract: An electret type vibration detection system has a vibration-powered generator that performs vibration-induced power generation by displacing on a basis of external vibration an electret group formed of a plurality of electrets and an electrode group having a plurality of electrode pairs in a relative movement direction to output a vibration-induced voltage between electrodes of the electrode pair, and a transfer function memory section that stores transfer function information that defines a correlation between a vibration velocity of the external vibration and an output power voltage of the vibration-powered generator in a range of a predetermined frequency included in the external vibration, wherein the transfer function information contains a transfer coefficient set according to each of a plurality of frequencies belonging to the predetermined frequency range to place the vibration velocity of the external vibration and the output power voltage of the vibration-powered generator in a predetermined proportType: ApplicationFiled: February 28, 2013Publication date: May 28, 2015Inventors: Tatsuakira Masaki, Shinichi Nakao, Hideshi Nishida, Eiichi Sasaki, Hiroshi Yamaguchi
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Publication number: 20150137659Abstract: Power generated by a vibration power generator utilizing an electret is efficiently supplied to a power supply load. A vibration power generator includes a first substrate and a second substrate configured to be moved relative to each other by external vibration while remaining opposite each other, a group of a plurality of electrets arranged in the relative movement direction on one surface side of the first substrate, and a group of electrodes arranged in the relative movement direction on a surface side of the second substrate opposite to the group of electrets, and including a first current collecting electrode and a second current collecting electrode. A power supply load to which power generated by the external vibration is supplied and which has an impedance lower than an internal impedance of the vibration power generator is electrically connected to each of the first and second current collecting electrodes.Type: ApplicationFiled: June 19, 2013Publication date: May 21, 2015Inventors: Misato Nabeto, Tatsuakira Masaki, Keiki Matsuura
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Publication number: 20150069880Abstract: A vibration power generator configured to generate power by displacement between an electret group having a plurality of electrets and an electrode group having a plurality of electrodes in a relative movement direction in response to an external vibration, includes a casing in which the electret group and the electrode group are disposed, a fixed member in which one of the electret group and the electrode group is disposed, the fixed member being fixed to a side of the casing, and a movable member in which the other of the electret group and the electrode group is disposed. The movable member is disposed in the casing such that the movable member is relatively movable in response to the external vibration while opposed to the fixed member.Type: ApplicationFiled: February 8, 2013Publication date: March 12, 2015Applicant: OMRON CorporationInventors: Misato Nabeto, Masayo Ikuta, Tatsuakira Masaki
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Publication number: 20140328101Abstract: A voltage conversion circuit has a plurality of primary capacitors charged by a power supply, a secondary capacitor connected in parallel to the respective plurality of primary capacitors that is charged at a voltage supplied to a load circuit, a plurality of switching circuits provided in association with the respective plurality of primary capacitors that change over a connection state between the primary capacitors and the secondary capacitor, and a connection control circuit that successively connects the respective primary capacitors to the secondary capacitor through the corresponding switching circuits, the respective primary capacitors across which the charging voltages reach a predetermined connection voltage higher than a charging voltage across the secondary capacitor.Type: ApplicationFiled: August 28, 2012Publication date: November 6, 2014Applicant: OMRON CORPORATIONInventors: Hiroshi Sameshima, Misato Nabeto, Tatsuakira Masaki, Hiroshi Tsuji
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Publication number: 20140327337Abstract: A vibration sensor has a first substrate, a second substrate relatively movable by an external vibration while opposed to the first substrate, an electret group having a plurality of electrets that are arrayed in a relative movement direction on a side of one of surfaces of the first substrate, and an electrode group having a plurality of electrodes that are arrayed in the relative movement direction on a side of a surface of the second substrate. The surface of the second substrate is opposed to the electret group. A positional relationship between the electret group and the electrode group changes with a relative change in position of the first and second substrates by the external vibration to output an external vibration detection signal.Type: ApplicationFiled: August 16, 2012Publication date: November 6, 2014Applicant: OMRON CORPORATIONInventors: Tatsuakira Masaki, Toru Yokoyama, Keiki Matsuura
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Patent number: 8841816Abstract: On an upper surface of a fixed substrate, a plurality of strap-shaped base electrodes are arranged in parallel to each other. On each of the base electrodes, an electret is formed. The electret has a width wider than the width of each base electrode, and the electret covers an exposed surface of the base electrode. A movable substrate is disposed in parallel to and facing the surface of the fixed substrate where the electrets and others are formed. The movable substrate is movable relatively to the fixed substrate. On a facing surface of the movable substrate, strip-shaped counter electrodes are each formed so as to face each base electrode.Type: GrantFiled: November 12, 2009Date of Patent: September 23, 2014Assignee: OMRON CorporationInventors: Tatsuakira Masaki, Kenji Sakurai, Yuji Suzuki
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Patent number: 8796902Abstract: An electrostatic induction generator has a first substrate and a second substrate that can move relative to each other while remaining opposed to each other, an electret provided in the first substrate, and a first electrode and a second electrode provided on a surface side opposed to the electret in the second substrate. A positional relationship between the electret and the first electrode and a positional relationship between the electret and the second electrode change in association with a change of relative positions between the first substrate and the second substrate, whereby an electrostatic capacitance between the electret and the first electrode and an electrostatic capacitance between the electret and the second electrode change to output an electric power. A structure that decreases the electrostatic capacitance between the first electrode and the second electrode is provided between the first electrode and the second electrode.Type: GrantFiled: July 29, 2010Date of Patent: August 5, 2014Assignee: Omron CorporationInventors: Tatsuakira Masaki, Kenji Sakurai, Toru Yokoyama
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Publication number: 20130201742Abstract: A voltage converting circuit includes a plurality of first capacitors that are charged by a power source, a second capacitor, connected in parallel to the plurality of first capacitors, which is able to be charged to a voltage that is supplied to a load circuit, and a plurality of switching circuits, provided in such a way as to correspond to the plurality of first capacitors, each of which switches states of connection between its corresponding first capacitor and the second capacitor. The first capacitors are sequentially connected to the second capacitor through the corresponding switching circuits as charging voltages of the first capacitors reach a predetermined connection voltage that is higher than a charging voltage of the second capacitor so that the first capacitors are not short-circuited with each other.Type: ApplicationFiled: March 16, 2011Publication date: August 8, 2013Applicant: OMRON CORPORATIONInventors: Misato Nabeto, Kenji Sakurrai, Tatsuakira Masaki, Hiroshi Sameshima, Hiroshi Tsuji
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Publication number: 20120181897Abstract: An electrostatic induction generator has a first substrate and a second substrate that can move relative to each other while remaining opposed to each other, an electret provided in the first substrate, and a first electrode and a second electrode provided on a surface side opposed to the electret in the second substrate. A positional relationship between the electret and the first electrode and a positional relationship between the electret and the second electrode change in association with a change of relative positions between the first substrate and the second substrate, whereby an electrostatic capacitance between the electret and the first electrode and an electrostatic capacitance between the electret and the second electrode change to output an electric power. A structure that decreases the electrostatic capacitance between the first electrode and the second electrode is provided between the first electrode and the second electrode.Type: ApplicationFiled: July 29, 2010Publication date: July 19, 2012Applicant: OMRON CORPORATIONInventors: Tatsuakira Masaki, Kenji Sakurai, Toru Yokoyama
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Publication number: 20120169179Abstract: On an upper surface of a fixed substrate, a plurality of strap-shaped base electrodes are arranged in parallel to each other. On each of the base electrodes, an electret is formed. The electret has a width wider than the width of each base electrode, and the electret covers an exposed surface of the base electrode. A movable substrate is disposed in parallel to and facing the surface of the fixed substrate where the electrets and others are formed. The movable substrate is movable relatively to the fixed substrate. On a facing surface of the movable substrate, strip-shaped counter electrodes are each formed so as to face each base electrode.Type: ApplicationFiled: November 12, 2009Publication date: July 5, 2012Applicant: OMRON CORPORATIONInventors: Tatsuakira Masaki, Kenji Sakurai, Yuji Suzuki