Patents by Inventor Osamu Furukawa
Osamu Furukawa 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: 11788898Abstract: An abnormal temperature detection device includes a temperature acquirer configured to acquire temperature data, a preprocessor configured to perform preprocessing for calculating difference data indicating a difference sequence in the temperature data, generating substituted data in which either of a piece of difference data which is a positive number or a piece of difference data which is a negative number is substituted with zero, and calculating a similarity between the substituted data and reference data obtained from training data in which normality or abnormality has been identified, a learner configured to perform machine learning on the similarity calculated by the preprocessor and output an identification function, and a determiner configured to determine whether temperature data for detection acquired by the temperature acquirer and subjected to the preprocessing by the preprocessor is normal or abnormal by using the identification function.Type: GrantFiled: August 13, 2021Date of Patent: October 17, 2023Assignee: Yokogawa Electric CorporationInventor: Osamu Furukawa
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Publication number: 20220187140Abstract: An abnormal temperature detection device includes a temperature acquirer configured to acquire temperature data; a preprocessor configured to perform preprocessing of calculating a feature amount of the temperature data; a synthesizer configured to perform synthesis processing of synthesizing the feature amount and past determination information indicating whether the temperature data acquired in the past is normal or abnormal; a learner configured to generate an identification model by performing machine learning on a result of synthesis by the synthesizer; and a determiner configured to determine whether temperature data for detection which is acquired by the temperature acquirer, and on which the preprocessing is performed by the preprocessor and the synthesis processing is performed by the synthesizer, is normal or abnormal by using the identification model.Type: ApplicationFiled: December 8, 2021Publication date: June 16, 2022Applicant: Yokogawa Electric CorporationInventor: Osamu Furukawa
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Optical fiber characteristics measuring apparatus and optical fiber characteristics measuring method
Patent number: 11326981Abstract: An optical fiber characteristics measuring apparatus includes: a light source that outputs frequency-modulated continuous wave of light; a first optical branching unit that branches the continuous light into pump light and reference light; a second optical branching unit that outputs backscattered light generated by making the pump light incident from one end of an optical fiber to be measured, wherein the backscattered light is Brillouin scattering in the optical fiber; a detector that detects interference light of the backscattered light and the reference light; a measuring unit that measures characteristics of the optical fiber by using a detection signal output from the detector; and a controller that controls the light source to change modulation frequency of the continuous light in units of one period or half a period of a modulation period corresponding to the modulation frequency.Type: GrantFiled: December 27, 2018Date of Patent: May 10, 2022Assignee: YOKOGAWA ELECTRIC CORPORATIONInventor: Osamu Furukawa -
Publication number: 20220065705Abstract: An abnormal temperature detection device includes a temperature acquirer configured to acquire temperature data, a preprocessor configured to perform preprocessing for calculating difference data indicating a difference sequence in the temperature data, generating substituted data in which either of a piece of difference data which is a positive number or a piece of difference data which is a negative number is substituted with zero, and calculating a similarity between the substituted data and reference data obtained from training data in which normality or abnormality has been identified, a learner configured to perform machine learning on the similarity calculated by the preprocessor and output an identification function, and a determiner configured to determine whether temperature data for detection acquired by the temperature acquirer and subjected to the preprocessing by the preprocessor is normal or abnormal by using the identification function.Type: ApplicationFiled: August 13, 2021Publication date: March 3, 2022Applicant: Yokogawa Electric CorporationInventor: Osamu FURUKAWA
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Patent number: 11047767Abstract: An optical fiber characteristic measurement device includes: a detector that detects Brillouin scattered light obtained by causing light to be incident on an optical fiber under test; a spectrum analyzer that obtains a Brillouin gain spectrum from the Brillouin scattered light; and a spectrum analyzing controller that: measures a characteristic of the optical fiber under test by analyzing the Brillouin gain spectrum to obtain a peak frequency of the Brillouin gain spectrum, and changes a frequency range used by the spectrum analyzer to obtain the Brillouin gain spectrum according to the peak frequency.Type: GrantFiled: October 16, 2019Date of Patent: June 29, 2021Assignee: YOKOGAWA ELECTRIC CORPORATIONInventor: Osamu Furukawa
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Publication number: 20200124497Abstract: An optical fiber characteristic measurement device includes: a detector that detects Brillouin scattered light obtained by causing light to be incident on an optical fiber under test; a spectrum analyzer that obtains a Brillouin gain spectrum from the Brillouin scattered light; and a spectrum analyzing controller that: measures a characteristic of the optical fiber under test by analyzing the Brillouin gain spectrum to obtain a peak frequency of the Brillouin gain spectrum, and changes a frequency range used by the spectrum analyzer to obtain the Brillouin gain spectrum according to the peak frequency.Type: ApplicationFiled: October 16, 2019Publication date: April 23, 2020Applicant: YOKOGAWA ELECTRIC CORPORATIONInventor: Osamu Furukawa
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OPTICAL FIBER CHARACTERISTICS MEASURING APPARATUS AND OPTICAL FIBER CHARACTERISTICS MEASURING METHOD
Publication number: 20190195731Abstract: An optical fiber characteristics measuring apparatus includes: a light source that outputs frequency-modulated continuous wave of light; a first optical branching unit that branches the continuous light into pump light and reference light; a second optical branching unit that outputs backscattered light generated by making the pump light incident from one end of an optical fiber to be measured, wherein the backscatterd light is Brillouin scattering in the optical fiber; a detector that detects interference light of the backscattered light and the reference light; a measuring unit that measures characteristics of the optical fiber by using a detection signal output from the detector; and a controller that controls the light source to change modulation frequency of the continuous light in units of one period or half a period of a modulation period corresponding to the modulation frequency.Type: ApplicationFiled: December 27, 2018Publication date: June 27, 2019Applicant: YOKOGAWA ELECTRIC CORPORATIONInventor: Osamu Furukawa -
Patent number: 10018501Abstract: A measuring apparatus for contactlessly measuring vibration or displacement of a measurement target includes a light source configured to emit a continuous wave of light frequency-modulated to arrange a measurement site of the measurement target within a correlation peak, a divider configured to divide the continuous wave of light into first and second divided-waves of light, a light receiver configured to receive interfering light of the first divided-wave of light reflected by the measurement target and the second divided-wave of light, and a calculator configured to calculate the vibration or displacement of the measurement target using an electric signal output from the light receiver.Type: GrantFiled: March 2, 2017Date of Patent: July 10, 2018Assignee: Yokogawa Electric CorporationInventor: Osamu Furukawa
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Patent number: 9983095Abstract: An optical fiber characteristic measuring device of the present invention includes a light source, an optical divider, an optical waveguide, a first separator, a second separator, a first interferer, a second interferer, and a calculator. The light source is configured to generate a frequency modulated continuous wave of light. The optical divider is configured to divide the frequency modulated continuous wave of light into first and second divided-waves of light. The optical waveguide is configured to guide the first divided-wave of light to one end of an optical fiber to be measured. The first separator is configured to separate a backscattered light generated by Brillouin scattering of the first divided-wave of light in the optical fiber to be measured into a first scattered light, which is a linearly polarized light, and a second scattered light, which is a linearly polarized light perpendicular to the first scattered light.Type: GrantFiled: September 2, 2016Date of Patent: May 29, 2018Assignee: Yokogawa Electric CorporationInventors: Satoshi Matsuura, Osamu Furukawa
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Patent number: 9819273Abstract: An isolated power conversion apparatus has an isolation transformer, a series circuit including a load and an inductor connected in series with each other, the series circuit being disposed on a secondary side of the isolation transformer, and one or a plurality of switching means disposed between the series circuit and the secondary side of the isolation transformer, the switching means being bidirectional. This apparatus sends out power from a DC power supply of a primary side of the isolation transformer toward the load as DC power or AC power of an arbitrary polarity, or regenerates and supplies the DC power or AC power from the load to the DC power supply.Type: GrantFiled: January 26, 2015Date of Patent: November 14, 2017Assignee: NF CORPORATIONInventor: Osamu Furukawa
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Publication number: 20170254697Abstract: A measuring apparatus for contactlessly measuring vibration or displacement of a measurement target includes a light source configured to emit a continuous wave of light frequency-modulated to arrange a measurement site of the measurement target within a correlation peak, a divider configured to divide the continuous wave of light into first and second divided-waves of light, a light receiver configured to receive interfering light of the first divided-wave of light reflected by the measurement target and the second divided-wave of light, and a calculator configured to calculate the vibration or displacement of the measurement target using an electric signal output from the light receiver.Type: ApplicationFiled: March 2, 2017Publication date: September 7, 2017Applicant: Yokogawa Electric CorporationInventor: Osamu FURUKAWA
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Publication number: 20170184463Abstract: The present invention relates to a data processor and a data processing method which are capable of acquiring strain distribution data at the same time. The data processor having an acquirer for acquiring strain distribution data in which a distributed optical fiber sensor measures a strain at a set of positions of an optical fiber at different times; and an interpolator for calculating the strains at the set of positions of the optical fiber at the same time by interpolating positions and times of the strain distribution data acquired by the acquirer.Type: ApplicationFiled: December 27, 2016Publication date: June 29, 2017Applicant: YOKOGAWA ELECTRIC CORPORATIONInventors: Michio IMAI, Satoru MIURA, Arinori NIMURA, Satoshi MATSUURA, Osamu FURUKAWA
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Publication number: 20170067794Abstract: An optical fiber characteristic measuring device of the present invention includes a light source, an optical divider, an optical waveguide, a first separator, a second separator, a first interferer, a second interferer, and a calculator. The light source is configured to generate a frequency modulated continuous wave of light. The optical divider is configured to divide the frequency modulated continuous wave of light into first and second divided-waves of light. The optical waveguide is configured to guide the first divided-wave of light to one end of an optical fiber to be measured. The first separator is configured to separate a backscattered light generated by Brillouin scattering of the first divided-wave of light in the optical fiber to be measured into a first scattered light, which is a linearly polarized light, and a second scattered light, which is a linearly polarized light perpendicular to the first scattered light.Type: ApplicationFiled: September 2, 2016Publication date: March 9, 2017Applicant: YOKOGAWA ELECTRIC CORPORATIONInventors: Satoshi MATSUURA, Osamu FURUKAWA
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Publication number: 20150131339Abstract: An isolated power conversion apparatus has an isolation transformer, a series circuit including a load and an inductor connected in series with each other, the series circuit being disposed on a secondary side of the isolation transformer, and one or a plurality of switching means disposed between the series circuit and the secondary side of the isolation transformer, the switching means being bidirectional. This apparatus sends out power from a DC power supply of a primary side of the isolation transformer toward the load as DC power or AC power of an arbitrary polarity, or regenerates and supplies the DC power or AC power from the load to the DC power supply.Type: ApplicationFiled: January 26, 2015Publication date: May 14, 2015Applicant: NF CORPORATIONInventor: Osamu Furukawa
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Publication number: 20150131338Abstract: An isolated power conversion apparatus has an isolation transformer, a series circuit including a load and an inductor connected in series with each other, the series circuit being disposed on a secondary side of the isolation transformer, and one or a plurality of switching means disposed between the series circuit and the secondary side of the isolation transformer, the switching means being bidirectional. This apparatus sends out power from a DC power supply of a primary side of the isolation transformer toward the load as DC power or AC power of an arbitrary polarity, or regenerates and supplies the DC power or AC power from the load to the DC power supply.Type: ApplicationFiled: January 26, 2015Publication date: May 14, 2015Applicant: NF CORPORATIONInventor: Osamu Furukawa
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Publication number: 20130056883Abstract: According to one embodiment, a semiconductor device includes a base board, a mounting substrate, a semiconductor element, a holder, a holder terminal, a case, a first sealing layer, and a second sealing layer. The mounting substrate is provided on the base board. The semiconductor element is provided on the mounting substrate. The holder is provided above the mounting substrate. The holder terminal is held by the holder and electrically connected to the semiconductor element. The case surrounds the mounting substrate along a side face of the mounting substrate and surrounds the holder along a side face of the holder. The first sealing layer covers the mounting substrate and the semiconductor element inside a space surrounded by the case. The second sealing layer is provided on the first sealing layer inside the space surrounded by the case and has a higher hardness than the first sealing layer.Type: ApplicationFiled: March 20, 2012Publication date: March 7, 2013Applicant: Kabushiki Kaisha ToshibaInventor: Osamu FURUKAWA
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Patent number: 8346513Abstract: In three-dimensional data generation unit 120, data edition unit 122, generates a spreadsheet data that includes information relating to a plurality of node points on a continuous arrangement route of target components by interactive process with a user, and stores the data in storage unit 130. Three-dimensional data conversion unit 123, on the basis of spreadsheet data, arranges the node points in a three-dimensional space, connects node points having a predetermined relationship using line segments, and imparts cross-sectional shapes to the connected line segments, to carry out thereby conversion into target component arrangement three-dimensional data. Three-dimensional data management unit 124 stores the obtained target component arrangement three-dimensional data in storage unit 130, in a format readable by three-dimensional CAD or three-dimensional review system, and outputs the data in response to an output instruction from interface unit 110.Type: GrantFiled: October 7, 2009Date of Patent: January 1, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Yuuki Okada, Shingo Fujii, Hiroki Yabu, Osamu Furukawa
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Publication number: 20120250369Abstract: An isolated power conversion apparatus has an isolation transformer, a series circuit including a load and an inductor connected in series with each other, the series circuit being disposed on a secondary side of the isolation transformer, and one or a plurality of switching means disposed between the series circuit and the secondary side of the isolation transformer, the switching means being bidirectional. This apparatus sends out power from a DC power supply of a primary side of the isolation transformer toward the load as DC power or AC power of an arbitrary polarity, or regenerates and supplies the DC power or AC power from the load to the DC power supply.Type: ApplicationFiled: March 19, 2012Publication date: October 4, 2012Applicant: NF CORPORATIONInventor: Osamu Furukawa
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Patent number: 8040344Abstract: The present invention reduces the number of diagrams and the workload of management and the like, by aggregating spools of a common format, in plant design technology using a three-dimensional CAD system. Format specific data which is stored separately according to spool format is obtained by aggregating the respective spools in the internal data, which is generated by a data acquisition means, into respective common formats by a spool aggregation means.Type: GrantFiled: April 3, 2008Date of Patent: October 18, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Yuuki Okada, Osamu Furukawa
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Publication number: 20100094598Abstract: Three-dimensional data can be easily and automatically generated using existing non-three-dimensional data in the form of isometric drawings or the like, without resorting to three-dimensional arrangement adjustment CAD. In three-dimensional data generation unit 120, data edition unit 122, generates a spreadsheet data that includes information relating to a plurality of node points on a continuous arrangement route of target components by interactive process with a user, and stores the data in storage unit 130. Three-dimensional data conversion unit 123, on the basis of spreadsheet data, arranges the node points in a three-dimensional space, connects node points having a predetermined relationship using line segments, and imparts cross-sectional shapes to the connected line segments, to carry out thereby conversion into target component arrangement three-dimensional data.Type: ApplicationFiled: October 7, 2009Publication date: April 15, 2010Inventors: Yuuki OKADA, Shingo Fujii, Hiroki Yabu, Osamu Furukawa