Patents by Inventor Masaya Yamashita
Masaya Yamashita 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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Publication number: 20160302735Abstract: A pulse wave measuring apparatus is provided, the pulse wave measuring apparatus including: a cardiac pulse waveform information acquiring unit that optically acquires cardiac pulse waveform information from a region of a living body; and a pulse wave feature amount calculating unit that calculates a pulse wave feature amount based on the pulse waveform information, wherein the pulse waveform information acquiring unit has a video input unit that receives an input of a video of the region of the living body, and the pulse waveform information acquiring unit outputs a window signal that includes first sample data from the pulse waveform information, and outputs, from the video, the window signal whose sampling rate is fixed to a predetermined rate based on a reference signal indicating time.Type: ApplicationFiled: June 22, 2016Publication date: October 20, 2016Applicant: Asahi Kasei Kabushiki KaishaInventors: Yoshihiro NOGUCHI, Shimpei OGAWA, Masaya YAMASHITA, Akihiro OKAMOTO
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Patent number: 9453890Abstract: The present invention relates to a magnetic sensor and a magnetic detecting method of the same capable of detecting at least a magnetic field perpendicular to a substrate and a magnetic field parallel to the substrate in a state where the respective magnetic field components are mixed. One embodiment of the magnetic sensor detects a magnetic field of the orthogonal three axes, and includes a magnetic detector including a magnetic field sensitive material configured to detect a magnetic field component in a first direction, a magnetic field direction converters configured to convert a magnetic field component in a second direction and a magnetic field component in a third direction into magnetic field components in the first direction, the second direction being perpendicular to the first direction, the third direction being perpendicular to both of the first and the second directions.Type: GrantFiled: March 2, 2015Date of Patent: September 27, 2016Assignee: Asahi Kasei Microdevices CorporationInventors: Masaya Yamashita, Yo Yamagata, Ken Tanaka, Norihiko Mikoshiba
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Publication number: 20160047652Abstract: An angular velocity sensor is provided, the angular velocity sensor comprising: a housing an outer edge shape of which is a polygon in a planar view; a planar substrate fixed to the housing; a vibrating weight that is surrounded by the housing and is formed to extend in a perpendicular direction in relation to the planar substrate on the planar substrate; and a vibrating unit to vibrate the vibrating weight in a predetermined direction, wherein the vibrating unit vibrates the vibrating weight in a different direction from a direction of a straight line that connects the shortest distance between the outer edge of the housing and the center of gravity of the vibrating weight in a planar view.Type: ApplicationFiled: October 27, 2015Publication date: February 18, 2016Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Koji MATSUSHITA, Masaya YAMASHITA
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Publication number: 20150316638Abstract: The present invention relates to a magnetic sensor with a sensitivity measuring function and a method thereof. Magnetic sensitivity elements detect flux density, and a switching unit extracts magnetic field intensity information of each axis, and inputs it to a sensitivity calculating unit. The sensitivity calculating unit calculates the sensitivity from the magnetic field intensity information about the individual axes from the magnetic sensitivity elements. The sensitivity calculating unit includes an axial component analyzing unit for analyzing the flux density from the magnetic sensitivity elements into magnetic components of the individual axes; a sensitivity decision unit for deciding the sensitivity by comparing the individual axial components of the magnetic field intensity from the axial component analyzing unit with a reference value; and a sensitivity correction unit for carrying out sensitivity correction in accordance with the sensitivity information from the sensitivity decision unit.Type: ApplicationFiled: July 14, 2015Publication date: November 5, 2015Applicant: ASAHI KASEI MICRODEVICES CORPORATIONInventors: Masaya YAMASHITA, Yo YAMAGATA
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Patent number: 9161399Abstract: An adjustable power supply (1) for light emitting diode arrangements (11), with the power supply (1) being dimensioned for a power class. The power supply (1) has an adjustable current source (3) and an adjustable power limitation (4), and the power limitation (4) is adjustable within the limits of the power class. The power supply (1) further has a control component (5) that is suitable for running an operating program (8). This operating program (8) uses, as its input parameters (7), the number of light emitting diodes (13) to be controlled and their method of connection and, from these parameters, it calculates the required current and the required power, according to which the current source (3) and the power limitation (4) are adjusted and regulated.Type: GrantFiled: January 13, 2012Date of Patent: October 13, 2015Assignee: Minebea Co., Ltd.Inventors: Manfred Schlenk, Masaya Yamashita
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Patent number: 9148158Abstract: There is provided a signal processing device comprising a combination unit (3) configured to combine plural element signals based on plural physical quantity signals including signal components in accordance with desired physical quantities, respectively, by the number of times equal to or greater than a number of the plural physical quantity signals, and to output combined signals different from each other; a measuring unit (4) configured to sequentially receive the combined signals output from the combination unit (3); and a computing unit (5) configured to compute signal components based on the desired physical quantities from signals that are generated based on the combined signals sequentially output from the measuring unit.Type: GrantFiled: January 25, 2013Date of Patent: September 29, 2015Assignee: Asahi Kasei Kabushiki KaishaInventors: Hiroyuki Sasaki, Masaya Yamashita
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Publication number: 20150241524Abstract: There is provided a signal processing device comprising a combination unit (3) configured to combine plural element signals based on plural physical quantity signals including signal components in accordance with desired physical quantities, respectively, by the number of times equal to or greater than a number of the plural physical quantity signals, and to output combined signals different from each other; a measuring unit (4) configured to sequentially receive the combined signals output from the combination unit (3); and a computing unit (5) configured to compute signal components based on the desired physical quantities from signals that are generated based on the combined signals sequentially output from the measuring unit.Type: ApplicationFiled: May 11, 2015Publication date: August 27, 2015Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Hiroyuki Sasaki, Masaya Yamashita
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Patent number: 9116195Abstract: The present invention relates to a magnetic sensor with a sensitivity measuring function and a method thereof. Magnetic sensitivity surfaces detect flux density, and a switching unit extracts magnetic field intensity information of each axis, and inputs it to a sensitivity calculating unit. The sensitivity calculating unit calculates the sensitivity from the magnetic field intensity information about the individual axes from the magnetic sensitivity surfaces. The sensitivity calculating unit includes an axial component analyzing unit for analyzing the flux density from the magnetic sensitivity surfaces into magnetic components of the individual axes; a sensitivity decision unit for deciding the sensitivity by comparing the individual axial components of the magnetic field intensity from the axial component analyzing unit with a reference value; and a sensitivity correction unit for carrying out sensitivity correction in accordance with the sensitivity information from the sensitivity decision unit.Type: GrantFiled: March 21, 2008Date of Patent: August 25, 2015Assignee: Asahi Kasei EMD CorporationInventors: Masaya Yamashita, Yo Yamagata
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Patent number: 9094035Abstract: There is provided a signal processing device comprising a combination unit (3) configured to combine plural element signals based on plural physical quantity signals including signal components in accordance with desired physical quantities, respectively, by the number of times equal to or greater than a number of the plural physical quantity signals, and to output combined signals different from each other; a measuring unit (4) configured to sequentially receive the combined signals output from the combination unit (3); and a computing unit (5) configured to compute signal components based on the desired physical quantities from signals that are generated based on the combined signals sequentially output from the measuring unit.Type: GrantFiled: January 25, 2013Date of Patent: July 28, 2015Assignee: Asahi Kasei Kabushiki KaishaInventors: Hiroyuki Sasaki, Masaya Yamashita
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Publication number: 20150177337Abstract: The present invention relates to a magnetic sensor and a magnetic detecting method of the same capable of detecting at least a magnetic field perpendicular to a substrate and a magnetic field parallel to the substrate in a state where the respective magnetic field components are mixed. One embodiment of the magnetic sensor detects a magnetic field of the orthogonal three axes, and includes a magnetic detector including a magnetic field sensitive material configured to detect a magnetic field component in a first direction, a magnetic field direction converters configured to convert a magnetic field component in a second direction and a magnetic field component in a third direction into magnetic field components in the first direction, the second direction being perpendicular to the first direction, the third direction being perpendicular to both of the first and the second directions.Type: ApplicationFiled: March 2, 2015Publication date: June 25, 2015Applicant: ASAHI KASEI MICRODEVICES CORPORATIONInventors: Masaya YAMASHITA, Yo YAMAGATA, Ken TANAKA, Norihiko MIKOSHIBA
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Publication number: 20150143145Abstract: When an amount of a change of a temperature sensor output value is greater than a threshold, the occupation ratio is updated. When the amount of the change of the temperature sensor output value is equal to or smaller greater than the threshold, the occupation ratio is not updated and the background temperature is updated by using the occupation ratio at the time one sampling period before. When a difference between the temperature sensor output value and the background temperature calculated in this way becomes equal to or smaller than a threshold for an absence stated determination, it is determined an user is in an absence state.Type: ApplicationFiled: July 12, 2013Publication date: May 21, 2015Applicant: ASAHI KASEI MICRODEVICES CORPORATIONInventors: Kyoya Nakamikawa, Masaya Yamashita
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Publication number: 20140368370Abstract: There is provided a signal processing device comprising a combination unit (3) configured to combine plural element signals based on plural physical quantity signals including signal components in accordance with desired physical quantities, respectively, by the number of times equal to or greater than a number of the plural physical quantity signals, and to output combined signals different from each other; a measuring unit (4) configured to sequentially receive the combined signals output from the combination unit (3); and a computing unit (5) configured to compute signal components based on the desired physical quantities from signals that are generated based on the combined signals sequentially output from the measuring unit.Type: ApplicationFiled: January 25, 2013Publication date: December 18, 2014Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Hiroyuki Sasaki, Masaya Yamashita
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Publication number: 20140350894Abstract: The sensor device includes a counter for counting the number of count commands used to perform measurements while maintaining among multiple sensor devices the ratio of measurement intervals; a ratio-holding-unit for setting the ratio to a desired ratio and holding respective values of the ratio for each of the multiple sensor devices; a sampling-timing-generating-unit for receiving a count value of the counter and the setting value of the ratio held by the ratio-holding-unit, and for generating a sampling timing signal based on the comparison result between the count value and the setting value; and a sampling-unit for sampling a detection signal detected by the detecting unit, by using the sampling timing signal generated by the sampling-timing-generating-unit.Type: ApplicationFiled: February 24, 2012Publication date: November 27, 2014Inventors: Masaya Yamashita, Shiro Kobayashi, Osamu Koizumi, Yuko Akagi
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Publication number: 20140257731Abstract: An offset estimation device includes a rotation axis calculation part and an offset estimation part. The rotation axis calculation part is configured to: obtain multiple sets of magnetic data detected by the magnetic sensor and multiple sets of angular velocity data in accordance with the rotation amount of the offset estimation device; and on the basis of an arbitrary magnetic data group of the multiple sets of magnetic data and respective magnetic data corresponding to the magnetic data group, determine multiple rotation axes that pass through the center of a plane passing through the magnetic data group and indicate straight lines perpendicular to the plane. The offset estimation part is configured to estimate the offset of the magnetic data to be outputted from the magnetic sensor on the basis of the multiple rotation axes.Type: ApplicationFiled: February 22, 2013Publication date: September 11, 2014Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Masahiro Konda, Masaya Yamashita
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Publication number: 20120181949Abstract: An adjustable power supply (1) for light emitting diode arrangements (11), with the power supply (1) being dimensioned for a power class. The power supply (1) has an adjustable current source (3) and an adjustable power limitation (4), and the power limitation (4) is adjustable within the limits of the power class. The power supply (1) further has a control component (5) that is suitable for running an operating program (8). This operating program (8) uses, as its input parameters (7), the number of light emitting diodes (13) to be controlled and their method of connection and, from these parameters, it calculates the required current and the required power, according to which the current source (3) and the power limitation (4) are adjusted and regulated.Type: ApplicationFiled: January 13, 2012Publication date: July 19, 2012Applicant: Minebea Co., Ltd.Inventors: Manfred Schlenk, Masaya Yamashita
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Patent number: 8150657Abstract: The present invention relates to a physical quantity measuring instrument and signal processing method thereof capable of reducing noise components and improving reliability without increasing size or cost of the circuit. A physical quantity detecting unit (11) has signal detecting components for detecting a plurality of signals based on a desired physical quantity and detects the desired physical quantity. A signal processing unit (12) executes signal processing of the signals detected on the individual detecting axes by the physical quantity detecting unit (11) for linearly combining the signals in different combinations with time. An arithmetic processing unit (13) combines and calculates a plurality of signals based on the physical quantity associated with the physical quantity detecting unit (11) from the signal data output by the signal processing unit (12).Type: GrantFiled: September 12, 2007Date of Patent: April 3, 2012Assignee: Asahi Kasei EMD CorporationInventors: Masaya Yamashita, Toru Kitamura, Munehiro Kitaura
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Patent number: 8027803Abstract: The present invention relates to a traveling direction measuring apparatus usable as a pedestrian navigation system in locations where it is difficult to obtain high positioning accuracy such as inside buildings or around multistory buildings where a GPS cannot be used. An acceleration detecting section (1) detects 3-axes acceleration of the traveling direction measuring apparatus, which varies with the walking of the pedestrian. An acceleration data acquiring section (2) obtains 3-axes acceleration data repeatedly by the number of prescribed times or more, said 3-axes acceleration data varies with the walking of the pedestrian. A first gravity acceleration calculating section (3) calculates, when the pedestrian is walking with holding the traveling direction measuring apparatus in a generally fixed attitude, gravity acceleration by averaging acceleration data sets during several steps obtained by the acceleration data acquiring section (2).Type: GrantFiled: February 26, 2010Date of Patent: September 27, 2011Assignee: Asahi Kasei EMD CorporationInventors: Toru Kitamura, Masaya Yamashita
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Patent number: 7893628Abstract: The presented circuit makes it possible to operate a plurality of gas discharge lamps, particularly cold cathode tubes, at a common voltage source. The uniform distribution of current to all the lamps is achieved without using any magnetic components, but only using semiconductor components.Type: GrantFiled: October 19, 2007Date of Patent: February 22, 2011Assignee: Minebea Co., Ltd.Inventors: Robert Weger, Masaya Yamashita
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Patent number: 7881900Abstract: A reference point defined on a two dimensional or three dimensional orthogonal coordinate space and scale reference of respective axes are estimated based on a distribution on the three dimensional orthogonal coordinate space at the time when respective axial components of an acceleration data group comprised of plural acceleration data including multi-axial components and a importance group pertaining to the acceleration data group, and the respective acceleration data are corrected based on the estimated reference point and scale reference of the respective axes.Type: GrantFiled: December 27, 2006Date of Patent: February 1, 2011Assignee: Asahi Kasei Emd CorporationInventors: Toru Kitamura, Masaya Yamashita
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Spatial Information Detecting System, its Detecting Method, and Spatial Information Detecting Device
Publication number: 20100277163Abstract: The present invention relates to a spatial information detecting system. A magnetic sensor driving unit drives a magnetic sensor via a multiplexer unit. Signals of the magnetic sensor are converted from analog signals to digital signals, and are transmitted from a data transmitting unit to an arithmetic unit as magnetic data. A Fourier transform unit calculates the amplitudes and phases of a plurality of frequency components of individual axes from the output signal of the magnetic data receiving unit. A magnetic field vector calculating unit calculates signs of the amplitudes of the individual axes from phase relationships between the plurality of frequency components on the individual axes from the output signal from the Fourier transform unit, and calculates the magnetic field vector representing the direction and magnitude of the magnetic field from the signs and amplitudes. A direction calculating unit calculates the direction of the information terminal.Type: ApplicationFiled: February 8, 2008Publication date: November 4, 2010Applicant: ASAHI KASEI EMD CORPORATIONInventors: Takenobu Nakamura, Masaya Yamashita