Patents by Inventor Toru Ezawa
Toru Ezawa 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: 10372183Abstract: According to one embodiment, a storage-battery evaluation device includes: a data generator and a deterioration evaluator. The data generator generates a plurality of data items including charge amounts and voltage values of an energy storage device based on current values and the voltage values measured from the energy storage device, the energy storage device being subjected to charge/discharge control in accordance with charge/discharge command values. The deterioration evaluator evaluates a deterioration state of the energy storage device based on a distribution of the voltage values included in the data items the charge amounts of which belong to a first charge-amount range when it is detected that a distribution of first charge/discharge command values satisfies a predetermined condition, the first charge/discharge command values being the charge/discharge command values at which the data items the charge amounts of which belong to the first charge-amount range is obtained.Type: GrantFiled: March 9, 2016Date of Patent: August 6, 2019Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Takahiro Yamamoto, Shinichiro Kosugi, Ryosuke Takeuchi, Masatake Sakuma, Takahisa Wada, Toru Ezawa, Takenori Kobayashi
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Patent number: 10026240Abstract: According to one embodiment, an abnormality diagnostic device includes processing circuitry. The processing circuitry learns, based on a model generated from sensor data of a diagnostic object in a railroad vehicle, a data selection condition for selecting the sensor data utilized to diagnose the diagnostic object. The processing circuitry diagnoses abnormality of the diagnostic object based on the sensor data satisfying the data selection condition and a diagnostic model representing a relation between the sensor data and the abnormality of the diagnostic object.Type: GrantFiled: September 13, 2016Date of Patent: July 17, 2018Assignee: Kabushiki Kaisha ToshibaInventor: Toru Ezawa
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Patent number: 9952289Abstract: A storage battery evaluating apparatus according to an embodiment includes a determiner, a corrector, a QV curve generator, an evaluator, and a feedbacker. The determiner determines a charging/discharging tendency of a storage battery based on measurement data including voltage data. The corrector corrects the voltage data based on a correction parameter. The correction parameter corresponds to at least one of the charging/discharging tendency and a degraded state of the storage battery. The QV curve generator generates a QV curve of the storage battery based on the voltage data which has been corrected. The evaluator evaluates the degraded state based on the QV curve. The feedbacker feeds back, to the corrector, the corrected parameter corresponding to the degraded state.Type: GrantFiled: October 23, 2015Date of Patent: April 24, 2018Assignee: Kabushiki Kaisha ToshibaInventors: Yuki Hanyu, Takahiro Yamamoto, Toru Ezawa, Akihiro Itakura
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Publication number: 20170178426Abstract: According to one embodiment, an abnormality diagnostic device includes processing circuitry. The processing circuitry learns, based on a model generated from sensor data of a diagnostic object in a railroad vehicle, a data selection condition for selecting the sensor data utilized to diagnose the diagnostic object. The processing circuitry diagnoses abnormality of the diagnostic object based on the sensor data satisfying the data selection condition and a diagnostic model representing a relation between the sensor data and the abnormality of the diagnostic object.Type: ApplicationFiled: September 13, 2016Publication date: June 22, 2017Inventor: Toru EZAWA
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Publication number: 20170096153Abstract: A regenerative power-amount estimation device according to an embodiment includes a regenerative power-amount estimation model for each brake notch switching configured to include a transient response of an electric brake corresponding to a switching operation of a brake notch for each switching operation of the brake notch in an operation of railway vehicles. A regenerative power-amount estimation part is configured to estimate an expected amount of regenerative power acquired for a brake plan being temporal transition data of the brake notch, based on the regenerative power-amount estimation model for each brake notch switching.Type: ApplicationFiled: September 14, 2016Publication date: April 6, 2017Inventors: Toru EZAWA, Akihiro ITAKURA, Takahiro NISHIZAWA, Kozo BANNO
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Publication number: 20170031404Abstract: According to one embodiment, a storage-battery evaluation device includes: a data generator and a deterioration evaluator. The data generator generates a plurality of data items including charge amounts and voltage values of an energy storage device based on current values and the voltage values measured from the energy storage device, the energy storage device being subjected to charge/discharge control in accordance with charge/discharge command values. The deterioration evaluator evaluates a deterioration state of the energy storage device based on a distribution of the voltage values included in the data items the charge amounts of which belong to a first charge-amount range when it is detected that a distribution of first charge/discharge command values satisfies a predetermined condition, the first charge/discharge command values being the charge/discharge command values at which the data items the charge amounts of which belong to the first charge-amount range is obtained.Type: ApplicationFiled: March 9, 2016Publication date: February 2, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Takahiro YAMAMOTO, Shinichiro Kosugi, Ryosuke Takeuchi, Masatake Sakuma, Takahisa Wada, Toru Ezawa, Takenori Kobayashi
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Publication number: 20160187431Abstract: A storage battery includes power storage devices in series and switching circuits each arranged between adjacent power storage devices. Each switching circuit includes an input terminal I, an output terminal O, an input terminal Si, and an output terminal So, a first switch that electrically connects the input terminal Si and the output terminal O, a second switch that electrically connects the input terminal I and the output terminal So, a third switch that electrically connects the input terminal I and the output terminal O, and a fourth switch that electrically connects the input terminal Si and the output terminal So. The input terminal Si is electrically connected to the output terminal So of one of adjacent switching circuits and the output terminal So is electrically connected to the input terminal Si of the other of the adjacent switching circuits.Type: ApplicationFiled: December 23, 2015Publication date: June 30, 2016Inventors: Takahiro Yamamoto, Yuki Hanyu, Akihiro Itakura, Toru Ezawa
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Publication number: 20160190827Abstract: According to one embodiment, a charging device includes: a battery controller, an executor, a voltage measurer, a voltage corrector and a diagnoser. The battery controller controls charging of a storage battery. The executor charges the storage battery using the battery controller and changes a charge rate of the storage battery in a case that a predetermined condition is established during a time period when the storage battery is charged. The voltage measurer measures a voltage of the storage battery during a time period when the storage battery is charged by the battery controller. The voltage corrector corrects the voltage measured by the voltage measurer on a basis of a value of a current rate at which the voltage is measured. The diagnoser diagnoses the storage battery on a basis of the voltage corrected by the voltage corrector.Type: ApplicationFiled: March 9, 2016Publication date: June 30, 2016Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Toru EZAWA, Takashi KAMITAKE
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Publication number: 20160116547Abstract: A storage battery evaluating apparatus according to an embodiment includes a determiner, a corrector, a QV curve generator, an evaluator, and a feedbacker. The determiner determines a charging/discharging tendency of a storage battery based on measurement data including voltage data. The corrector corrects the voltage data based on a correction parameter. The correction parameter corresponds to at least one of the charging/discharging tendency and a degraded state of the storage battery. The QV curve generator generates a QV curve of the storage battery based on the voltage data which has been corrected. The evaluator evaluates the degraded state based on the QV curve. The feedbacker feeds back, to the corrector, the corrected parameter corresponding to the degraded state.Type: ApplicationFiled: October 23, 2015Publication date: April 28, 2016Inventors: Yuki HANYU, Takahiro YAMAMOTO, Toru EZAWA, Akihiro ITAKURA
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Patent number: 9157965Abstract: There is provided a storage battery deterioration diagnosis system, including: a cell-list creator configured to select diagnosis target cells from among a plurality of cells in a storage battery system, and create a list of the diagnosis target cells; a cell deterioration diagnoser configured to obtain degradation degrees of the diagnosis target cells; a temperature distribution estimator configured to estimate degradation degrees of non-target cells other than the diagnosis target cells, based on a distance between the non-target cell and the diagnosis target cells, and obtain temperature distribution of a whole of the plurality of cells based on degradation degrees of the diagnosis target cells and the degradation degrees of the non-target cells; and a cell-list updater configured to update the list of the diagnosis target cells based on the temperature distribution.Type: GrantFiled: November 8, 2012Date of Patent: October 13, 2015Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Toru Ezawa, Akihiro Itakura
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Patent number: 9093844Abstract: There is provided a charge/discharge scheduling system in which a measurer measures temperature of a battery unit, a current/voltage measurer measures a voltage and a current at the battery unit, an estimating unit estimates an internal resistance of the battery unit, a scheduler creates, based on a charge/discharge instruction specifying charge amount or discharge amount, a charging schedule or a discharging schedule for the battery unit, a temperature estimating unit estimates time-transition of temperature of the battery unit, based on the internal resistance of the battery unit, the load estimator estimates a load amount applied to the battery unit based on the temperature time-transition of the battery unit provided that the charging schedule or the discharging schedule is carried out, the charge/discharge scheduler creates the charge schedule or the discharge schedule so that the load amount applied to the battery unit is a minimum or smaller than a threshold value.Type: GrantFiled: November 14, 2012Date of Patent: July 28, 2015Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Minoru Yonezawa, Toru Ezawa, Hideyuki Aisu
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Publication number: 20130119939Abstract: There is provided a charge/discharge scheduling system in which a measurer measures temperature of a battery unit, a current/voltage measurer measures a voltage and a current at the battery unit, an estimating unit estimates an internal resistance of the battery unit, a scheduler creates, based on a charge/discharge instruction specifying charge amount or discharge amount, a charging schedule or a discharging schedule for the battery unit, a temperature estimating unit estimates time-transition of temperature of the battery unit, based on the internal resistance of the battery unit, the load estimator estimates a load amount applied to the battery unit based on the temperature time-transition of the battery unit provided that the charging schedule or the discharging schedule is carried out, the charge/discharge scheduler creates the charge schedule or the discharge schedule so that the load amount applied to the battery unit is a minimum or smaller than a threshold value.Type: ApplicationFiled: November 14, 2012Publication date: May 16, 2013Inventors: Minoru Yonezawa, Toru Ezawa, Hideyuki Aisu
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Publication number: 20130113492Abstract: There is provided a storage battery deterioration diagnosis system, including: a cell-list creator configured to select diagnosis target cells from among a plurality of cells in a storage battery system, and create a list of the diagnosis target cells; a cell deterioration diagnoser configured to obtain degradation degrees of the diagnosis target cells; a temperature distribution estimator configured to estimate degradation degrees of non-target cells other than the diagnosis target cells, based on a distance between the non-target cell and the diagnosis target cells, and obtain temperature distribution of a whole of the plurality of cells based on degradation degrees of the diagnosis target cells and the degradation degrees of the non-target cells; and a cell-list updater configured to update the list of the diagnosis target cells based on the temperature distribution.Type: ApplicationFiled: November 8, 2012Publication date: May 9, 2013Inventors: Toru EZAWA, Akihiro Itakura
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Publication number: 20120081813Abstract: A wiring structure includes: positive signal wires configured to transmit a positive signal of differential signals; and negative signal wires configured to transmit a negative signal of the differential signals. The positive signal wires and the negative signal wires are interleaved. A first gap length and a second gap length are different from each other where the first gap length is a gap length between a first wire being an outermost wire among the positive signal wires and the negative signal wires and a first adjacent wire that is adjacent to the first wire, where the second gap length is a gap length between a second wire that is located inside among the positive signal wires and the negative signal wires and a second adjacent wire that is adjacent to the second wire. The second wire and the second adjacent wire are different from the first wire.Type: ApplicationFiled: August 24, 2011Publication date: April 5, 2012Applicant: Kabushiki Kaisha ToshibaInventors: Toru EZAWA, Tomokazu Okubo
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Patent number: 8027118Abstract: According to one embodiment, an apparatus for controlling a head includes a transmitting module and a controller. The transmitting module is configured to transmit a write signal to a magnetic head having a spin torque oscillator at the time of recording data. The controller is configured to supply a drive signal that has a level higher than the ordinary level for a prescribed effective time, to the spin-torque oscillator in response to an input write gate that instructs the recording of data. During a period other than prescribed effective time, the controller supplies a drive signal having the ordinary level to the spin-torque oscillator.Type: GrantFiled: July 26, 2010Date of Patent: September 27, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Toru Ezawa, Shuichi Kojima, Masahide Kanegae, Kenichiro Yamada, Katsuhiko Koui, Masayuki Takagishi
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Publication number: 20110128648Abstract: According to one embodiment, an apparatus for controlling a head includes a transmitting module and a controller. The transmitting module is configured to transmit a write signal to a magnetic head having a spin torque oscillator at the time of recording data. The controller is configured to supply a drive signal that has a level higher than the ordinary level for a prescribed effective time, to the spin-torque oscillator in response to an input write gate that instructs the recording of data. During a period other than prescribed effective time, the controller supplies a drive signal having the ordinary level to the spin-torque oscillator.Type: ApplicationFiled: July 26, 2010Publication date: June 2, 2011Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Toru EZAWA, Shuichi KOJIMA, Masahide KANEGAE, Kenichiro YAMADA, Katsuhiko KOUI, Masayuki TAKAGISHI