Patents by Inventor Yoshifumi Wakisaka
Yoshifumi Wakisaka 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: 11280668Abstract: A distributed optical fiber vibration measurement device includes a phase constant difference computation unit causing the first backscattered light generated at the points of a plurality of optical fibers under test that are integrated to interfere with another light to obtain two AC components and determining a phase constant difference from the two AC components, a phase distribution data creation unit comparing amplitudes between the two AC components obtained by causing the first backscattered light generated at the points of the optical fibers under test to interfere with the other light and selecting, for each of the points, phase data regarding one of the two AC components having a larger amplitude to create phase distribution data with the phase data, and a vibration measurement unit identifying an optical path length difference between any two points of the optical fiber under test to measure vibration of the optical fiber under test.Type: GrantFiled: June 19, 2019Date of Patent: March 22, 2022Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kunihiro Toge, Daisuke Iida, Shingo Ono, Yoshifumi Wakisaka, Tetsuya Manabe
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Publication number: 20220006521Abstract: It is an object to enable offline measurement with a high SN ratio of the phase of scattered light of an optical fiber to be measured in an optical receiving system for real-time measurement (direct measurement). The phase measurement method according to the present invention performs coherent detection of scattered light using a 90-degree optical hybrid, obtains an estimated quadrature component value by averaging a measured quadrature component value that is directly measured and a calculated quadrature component value obtained by Hilbert transforming a measured in-phase component value that is directly measured, obtains an estimated in-phase component value by averaging the measured in-phase component value and a calculated in-phase component value obtained by inverse Hilbert transforming the measured quadrature component value, and calculates the phase of scattered light based on the estimated quadrature component value and the estimated in-phase component value.Type: ApplicationFiled: November 14, 2019Publication date: January 6, 2022Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yoshifumi WAKISAKA, Daisuke IIDA, Keiji OKAMOTO, Hiroyuki OSHIDA
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Publication number: 20210278272Abstract: A distributed optical fiber vibration measurement device includes a phase constant difference computation unit causing the first backscattered light generated at the points of a plurality of optical fibers under test that are integrated to interfere with another light to obtain two AC components and determining a phase constant difference from the two AC components, a phase distribution data creation unit comparing amplitudes between the two AC components obtained by causing the first backscattered light generated at the points of the optical fibers under test to interfere with the other light and selecting, for each of the points, phase data regarding one of the two AC components having a larger amplitude to create phase distribution data with the phase data, and a vibration measurement unit identifying an optical path length difference between any two points of the optical fiber under test to measure vibration of the optical fiber under test.Type: ApplicationFiled: June 19, 2019Publication date: September 9, 2021Inventors: Kunihiro Toge, Daisuke Iida, Shingo Ono, Yoshifumi Wakisaka, Tetsuya Manabe
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Publication number: 20210223095Abstract: An object is to provide an optical fiber path search method, an optical fiber path search system, a signal processor, and a program that can be operated free of the effects of walls, supporting members, and the like so that only a signal generated by an acoustic wave propagating through the air can be extracted.Type: ApplicationFiled: May 29, 2019Publication date: July 22, 2021Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yoshifumi WAKISAKA, Daisuke IIDA, Kunihiro TOGE, Tetsuya MANABE
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Patent number: 10801403Abstract: The present embodiment relates to an internal combustion engine having an anodic oxide coating formed on at least a portion of an aluminum-based wall surface facing a combustion chamber. The anodic oxide coating has a plurality of nanopores extending substantially in the thickness direction of the anodic oxide coating, a first micropore extending from the surface toward the inside of the anodic oxide coating, and a second micropore present in the inside of the anodic oxide coating; the surface opening diameter of the nanopores is 0 nm or larger and smaller than 30 nm; the inside diameter of the nanopores is larger than the surface opening diameter; the film thickness of the anodic oxide coating is 15 ?m or larger and 130 ?m or smaller; and the porosity of the anodic oxide coating is 23% or more.Type: GrantFiled: June 26, 2019Date of Patent: October 13, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoki Nishikawa, Akio Kawaguchi, Hideo Yamashita, Keisuke Tanaka, Toshio Horie, Yoshifumi Wakisaka, Fumio Shimizu
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Publication number: 20200011237Abstract: The present embodiment relates to an internal combustion engine having an anodic oxide coating formed on at least a portion of an aluminum-based wall surface facing a combustion chamber. The anodic oxide coating has a plurality of nanopores extending substantially in the thickness direction of the anodic oxide coating, a first micropore extending from the surface toward the inside of the anodic oxide coating, and a second micropore present in the inside of the anodic oxide coating; the surface opening diameter of the nanopores is 0 nm or larger and smaller than 30 nm; the inside diameter of the nanopores is larger than the surface opening diameter; the film thickness of the anodic oxide coating is 15 ?m or larger and 130 ?m or smaller; and the porosity of the anodic oxide coating is 23% or more.Type: ApplicationFiled: June 26, 2019Publication date: January 9, 2020Inventors: Naoki NISHIKAWA, Akio KAWAGUCHI, Hideo YAMASHITA, Keisuke TANAKA, Toshio HORIE, Yoshifumi WAKISAKA, Fumio SHIMIZU
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Patent number: 10385772Abstract: A forming method of a thermal insulation film includes a first step of forming an anode oxidation coating film on an aluminum-based wall surface, the anode oxidation coating film including micro-pores each having a diameter of micrometer-scale and nano-pores each having a diameter of nanometer-scale; and a second step of coating a surface of the anode oxidation coating film with a sealant containing filler to seal at least part of the micro-pores and the nano-pores by the sealant so as to form the thermal insulation film.Type: GrantFiled: December 18, 2015Date of Patent: August 20, 2019Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Reona Takagishi, Naoki Nishikawa, Masaaki Tani, Toshio Horie, Fumio Shimizu, Hiroshi Hohjo, Yoshifumi Wakisaka, Masakazu Murase
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Publication number: 20190137401Abstract: A stimulated Raman scattering microscope device is configured to irradiates a sample with a first optical pulse at a first repetition frequency, to irradiate the sample with a second optical pulse of an optical frequency different from an optical frequency of the first optical pulse at a second repetition frequency, and to detect optical pulses of the first repetition frequency that are included in detected light from the sample irradiated with the first optical pulse and the second optical pulse, as a detected optical pulse train. The second optical pulse is generated by dispersing predetermined optical pulses that include lights of a plurality of optical frequencies, regulating to output optical pulses of a predetermined number of different optical frequencies out of the dispersed optical pulses at the second repetition frequency, and coupling the regulated optical pulses.Type: ApplicationFiled: February 9, 2017Publication date: May 9, 2019Applicant: THE UNIVERSITY OF TOKYOInventors: Yasuyuki OZEKI, Yuta SUZUKI, Yoshifumi WAKISAKA, Keisuke GODA
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Patent number: 9863312Abstract: In an internal combustion engine in which an anodic oxide film (10) is formed on part or all of a wall surface facing a combustion chamber, the anodic oxide film (10) has a thickness of 30 ?m to 170 ?m, the anodic oxide film (10) has first micropores (1a) having a micro-size diameter, nanopores having a nano-size diameter and second micropores (1b) having a micro-size diameter, the first micropores (1a) and the nanopores extending from a surface of the anodic oxide film (10) toward an inside of the anodic oxide film (10) in a thickness direction of the anodic oxide film (10) or substantially the thickness direction, the second micropores (1b) being provided inside the anodic oxide film (10), at least part of the first micropores (1a) and the nanopores are sealed with a seal (2) converted from a sealant (2), and at least part of the second micropores (1b) are not sealed.Type: GrantFiled: July 30, 2014Date of Patent: January 9, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoki Nishikawa, Hiroshi Makino, Reona Takagishi, Akio Kawaguchi, Yoshifumi Wakisaka, Fumio Shimizu, Toshio Horie
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Patent number: 9683480Abstract: In a spark ignition engine, a thermal insulation thin layer is formed over a wall surface, facing an inside of a combustion chamber, of a base material forming the combustion chamber, and for a thermal conductivity ? [W/(m·K)], a thermal diffusivity ? [mm2/s], and a thickness L [?m] of the thermal insulation thin layer, L?16.7×? and L?207.4×(?)0.5 are satisfied. With such a configuration, a heat loss Q_total escaping from gas in a cylinder to the wall of the combustion chamber over all strokes can be reduced, and the thermal efficiency can be improved without inducing degradation of knocking due to an increase in an amount of heating Q_intake of the gas in the cylinder during an intake stroke.Type: GrantFiled: March 20, 2013Date of Patent: June 20, 2017Assignee: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Yoshihiro Nomura, Hidemasa Kosaka, Makoto Koike, Yoshifumi Wakisaka, Yoshihiro Hotta, Kiyomi Nakakita
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Publication number: 20160186654Abstract: A forming method of a thermal insulation film includes a first step of forming an anode oxidation coating film on an aluminum-based wall surface, the anode oxidation coating film including micro-pores each having a diameter of micrometer-scale and nano-pores each having a diameter of nanometer-scale; and a second step of coating a surface of the anode oxidation coating film with a sealant containing filler to seal at least part of the micro-pores and the nano-pores by the sealant so as to form the thermal insulation film.Type: ApplicationFiled: December 18, 2015Publication date: June 30, 2016Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Reona TAKAGISHI, Naoki NISHIKAWA, Masaaki TANI, Toshio HORIE, Fumio SHIMIZU, Hiroshi HOHJO, Yoshifumi WAKISAKA, Masakazu MURASE
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Publication number: 20160177818Abstract: In an internal combustion engine in which an anodic oxide film (10) is formed on part or all of a wall surface facing a combustion chamber, the anodic oxide film (10) has a thickness of 30 ?m to 170 ?m, the anodic oxide film (10) has first micropores (1a) having a micro-size diameter, nanopores having a nano-size diameter and second micropores (1b) having a micro-size diameter, the first micropores (1a) and the nanopores extending from a surface of the anodic oxide film (10) toward an inside of the anodic oxide film (10) in a thickness direction of the anodic oxide film (10) or substantially the thickness direction, the second micropores (1b) being provided inside the anodic oxide film (10), at least part of the first micropores (1a) and the nanopores are sealed with a seal (2) converted from a sealant (2), and at least part of the second micropores (1b) are not sealed.Type: ApplicationFiled: July 30, 2014Publication date: June 23, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoki NISHIKAWA, Hiroshi MAKINO, Reona TAKAGISHI, Akio KAWAGUCHI, Yoshifumi WAKISAKA, Fumio SHIMIZU, Toshio HORIE
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Patent number: 9359946Abstract: An internal combustion engine having an anodic oxidation coating formed on at least a part of a wall surface that faces a combustion chamber, wherein the anodic oxidation coating has voids and nano-holes smaller than the voids; at least part of the voids are sealed with a sealant derived by converting a sealing agent; and at least a part of the nano-holes are not sealed.Type: GrantFiled: September 11, 2012Date of Patent: June 7, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoki Nishikawa, Takumi Hijii, Akio Kawaguchi, Ryouta Yatsuduka, Fumio Shimizu, Yoshifumi Wakisaka, Hidemasa Kosaka
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Publication number: 20150354083Abstract: A method for forming a heat insulating film includes: a step of subjecting an aluminum alloy constituting a surface of a base material to an anodic oxidation treatment to form an anodic oxidation coating film having pores formed in the surface thereat a step of coating on the surface of the anodic oxidation coating film a sealing material that includes a silicon-based polymer solution and particles of a heat insulating material that are dispersed in the silicon-based polymer solution and are particles having an average particle diameter that is larger than an average pore diameter of the pores; and a step of drying and baking the sealing material to form a sealing coating film.Type: ApplicationFiled: June 8, 2015Publication date: December 10, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki IGUMA, Akio KAWAGUCHI, Manabu TATENO, Hideo YAMASHITA, Yoshifumi WAKISAKA
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Patent number: 8893693Abstract: An internal combustion engine in which an anodic oxidation coating film is formed on all or a portion of a wall that faces a combustion chamber, wherein the anodic oxidation coating film has a structure that is provided with a bonding region in which each of hollow cells forming the coating film is bonded to the adjacent hollow cells, and a nonbonding region in which three or more adjacent hollow cells are not bonded to each other, and wherein a porosity of the anodic oxidation coating film is determined by a first void present in the hollow cell and a second void that forms the nonbonding region.Type: GrantFiled: August 23, 2011Date of Patent: November 25, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Takumi Hijii, Naoki Nishikawa, Akio Kawaguchi, Koichi Nakata, Yoshifumi Wakisaka, Hidemasa Kosaka, Fumio Shimizu
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Publication number: 20140245994Abstract: An internal combustion engine having an anodic oxidation coating formed on at least a part of a wall surface that faces a combustion chamber, wherein the anodic oxidation coating has voids and nano-holes smaller than the voids; at least part of the voids are sealed with a sealant derived by converting a sealing agent; and at least a part of the nano-holes are not sealed.Type: ApplicationFiled: September 11, 2012Publication date: September 4, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoki Nishikawa, Takumi Hijii, Akio Kawaguchi, Ryouta Yatsuduka, Fumio Shimizu, Yoshifumi Wakisaka, Hidemasa Kosaka
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Publication number: 20130255651Abstract: In a spark ignition engine, a thermal insulation thin layer is formed over a wall surface, facing an inside of a combustion chamber, of a base material forming the combustion chamber, and for a thermal conductivity ? [W/(m·K)], a thermal diffusivity ? [mm2/s], and a thickness L [?m] of the thermal insulation thin layer, L?16.7×? and L?207.4×(?)0.5 are satisfied. With such a configuration, a heat loss Q_total escaping from gas in a cylinder to the wall of the combustion chamber over all strokes can be reduced, and the thermal efficiency can be improved without inducing degradation of knocking due to an increase in an amount of heating Q_intake of the gas in the cylinder during an intake stroke.Type: ApplicationFiled: March 20, 2013Publication date: October 3, 2013Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOInventors: Yoshihiro NOMURA, Hidemasa KOSAKA, Makoto KOIKE, Yoshifumi WAKISAKA, Yoshihiro HOTTA, Kiyomi NAKAKITA
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Publication number: 20130146041Abstract: An internal combustion engine in which an anodic oxidation coating film is formed on all or a portion of a wall that faces a combustion chamber, wherein the anodic oxidation coating film has a structure that is provided with a bonding region in which each of hollow cells forming the coating film is bonded to the adjacent hollow cells, and a nonbonding region in which three or more adjacent hollow cells are not bonded to each other, and wherein a porosity of the anodic oxidation coating film is determined by a first void present in the hollow cell and a second void that forms the nonbonding region.Type: ApplicationFiled: August 23, 2011Publication date: June 13, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takumi Hijii, Naoki Nishikawa, Akio Kawaguchi, Koichi Nakata, Yoshifumi Wakisaka, Hidemasa Kosaka, Fumio Shimizu
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Patent number: 8100345Abstract: A needle is forced to open an injection hole by reducing a pressure of fuel in an injection control chamber to thereby inject fuel stored in a fuel storage, while the needle is forced to close the injection hole by increasing the pressure of fuel in the injection control chamber to thereby terminate injection of fuel from the injection hole. In a valve-closing stroke of the needle to close the injection hole, fuel pressure is supplied from a common accumulator to the fuel storage and the injection control chamber in such a manner that the pressure to supply fuel to the fuel storage is lower than that to supply fuel to the injection control chamber. In this way, a force acting on the needle toward the injection hole side can be increased in the valve-closing stroke, to thereby accelerate a valve-closing speed of the needle.Type: GrantFiled: July 21, 2005Date of Patent: January 24, 2012Assignees: Toyota Jidosha Kabushiki Kaisha, Denso CorporationInventors: Yoshihiro Hotta, Yoshifumi Wakisaka, Kiyomi Kawamura
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Patent number: 7784492Abstract: In a direction control valve, a bottom face of an insertion hole of a first movable member is at a predetermined distance from a second movable member with respect to a first axial direction when communication between a first communication switching port and a communication object port is made and communication between a second communication switching port and the communication object port is broken. The bottom face contacts and pushes the second movable member in a second axial direction opposite to the first axial direction after the first movable member moves in the second axial direction by the predetermined distance while the first and second movable members move in the second axial direction to switch a port communicating with the communication object port from the first communication switching port to the second communication switching port.Type: GrantFiled: July 28, 2006Date of Patent: August 31, 2010Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Yoshihisa Yamamoto, Hirokuni Tomita, Yoshihiro Hotta, Yoshifumi Wakisaka, Kiyomi Kawamura