Patents by Inventor Tomomi Hasegawa
Tomomi Hasegawa 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).
-
Patent number: 8891781Abstract: An active vibration noise control device having a pair of speakers, including: a basic signal generating unit generating a basic signal based on a vibration noise frequency; an adaptive notch filter generating a first control signal provided to one speaker using a first filter coefficient and generating a second control signal provided to the other speaker using a second filter coefficient to cancel the generated vibration noise; a microphone detecting cancellation error between the vibration noise and the control sounds and outputting an error signal; a reference signal generating unit generating a reference signal based on a transfer function from the speakers to the microphone; a filter coefficient updating unit updating first and second filter coefficients, minimize the error signal; and a phase difference limiting unit limiting a phase difference between control sounds generated by different speakers. Therefore, it becomes possible to appropriately ensure a uniform and wide noise-cancelled area.Type: GrantFiled: April 15, 2009Date of Patent: November 18, 2014Assignee: Pioneer CorporationInventors: Yoshiki Ohta, Yoshitomo Imanishi, Tomomi Hasegawa, Manabu Nohara, Yusuke Soga
-
Publication number: 20120033821Abstract: An active vibration noise control device having a pair of speakers, including: a basic signal generating unit generating a basic signal based on a vibration noise frequency; an adaptive notch filter generating a first control signal provided to one speaker using a first filter coefficient and generating a second control signal provided to the other speaker using a second filter coefficient to cancel the generated vibration noise; a microphone detecting cancellation error between the vibration noise and the control sounds and outputting an error signal; a reference signal generating unit generating a reference signal based on a transfer function from the speakers to the microphone; a filter coefficient updating unit updating first and second filter coefficients, minimize the error signal; and a phase difference limiting unit limiting a phase difference between control sounds generated by different speakers. Therefore, it becomes possible to appropriately ensure a uniform and wide noise-cancelled area.Type: ApplicationFiled: April 15, 2009Publication date: February 9, 2012Applicant: PIONEER CORPORATIONInventors: Yoshiki Ohta, Yoshitomo Imanishi, Tomomi Hasegawa, Manabu Nohara, Yusuke Soga
-
Patent number: 8038921Abstract: A process for producing a molding having an embedded member which comprises: a first step in which a mold (1) having pins (3) which extend from the outside to the inside of the mold and can be withdrawn outward is heated to a given temperature; a second step in which a member (2) to be embedded is held in a given position within the mold by supporting the member, including an upper part thereof, with the pins (3); a third step in which a thermoplastic resin is packed through a gate (1d) first into that part of the cavity of the mold (1) which is located under the member to be embedded to thereby cause the thermoplastic resin to press the member against the pin (3) located in an upper part of the mold; a fourth step in which the thermoplastic resin is packed into the remaining part of the cavity of the mold (1); and a fifth step in which the pins (3) are withdrawn successively from the lower side of the mold before cooling to a temperature at which the thermoplastic resin solidifies and loses its flowability.Type: GrantFiled: September 13, 2005Date of Patent: October 18, 2011Assignees: Mitsubishi Electric Corporation, Central Japan Rail Way Company, Idemitsu Kosan Co., Ltd.Inventors: Yoshifumi Itabashi, Yoshihiro Jizo, Akihiro Fujita, Keizou Yoshikawa, Tsuyoshi Fujimoto, Hiromori Ishihara, Nobuhiko Mizuno, Futoshi Yonekawa, Tomomi Hasegawa
-
Patent number: 7950334Abstract: A ground coil device for a magnetic levitation railway that can be manufactured with a high productivity and exhibit less fluctuation in strength, reduced weight, and good recyclability, and a process for manufacturing the device. The ground coil device includes a coil conductor covered with a thermoplastic resin molding material containing 100 parts by mass of a thermoplastic resin, from 20 to 200 parts by mass of an inorganic filler, and from 0 to 25 parts by mass of an elastomer. A process for producing the ground coil device for magnetic levitation railway includes filling the thermoplastic resin molding material into a cavity of a metal mold into which the coil conductor is previously inserted, by an injection molding method, to obtain an integrally molded product.Type: GrantFiled: March 30, 2006Date of Patent: May 31, 2011Assignees: Idemitsu Kosan Co., Ltd., Mitsubishiki Denki Kabushiki Kaisha, Central Japan Railway CompanyInventors: Tomomi Hasegawa, Futoshi Yonekawa, Akihiro Fujita, Yoshihiro Jizo, Yoshifumi Itabashi, Keizo Yoshikawa, Tsuyoshi Fujimoto, Hiromori Ishihara, Nobuhiko Mizuno
-
Publication number: 20100290642Abstract: A speaker characteristic correction device obtains a first speaker information of a first speaker, obtains a first sound field characteristic at an evaluation point that is obtained by using the first speaker in advance, and obtains a second speaker parameter indicating a mechanical characteristic and an electric characteristic of a second speaker. Then, the speaker characteristic correction device calculates a correction characteristic based on the first speaker information and the second speaker parameter, and calculates the second sound field characteristic by applying the correction characteristic to the first sound field characteristic. Thereby, when the speaker type is changed, it is possible to easily calculate the sound field characteristic without performing the re-measurement by installing the speaker and without performing the re-analysis by setting the analysis condition.Type: ApplicationFiled: January 17, 2008Publication date: November 18, 2010Inventors: Tomomi Hasegawa, Yoshitomo Imanishi
-
Publication number: 20090115106Abstract: A process for producing a molding having an embedded member which comprises: a first step in which a mold (1) having pins (3) which extend from the outside to the inside of the mold and can be withdrawn outward is heated to a given temperature; a second step in which a member (2) to be embedded is held in a given position within the mold by supporting the member, including an upper part thereof, with the pins (3); a third step in which a thermoplastic resin is packed through a gate (1d) first into that part of the cavity of the mold (1) which is located under the member to be embedded to thereby cause the thermoplastic resin to press the member against the pin (3) located in an upper part of the mold; a fourth step in which the thermoplastic resin is packed into the remaining part of the cavity of the mold (1); and a fifth step in which the pins (3) are withdrawn successively from the lower side of the mold before cooling to a temperature at which the thermoplastic resin solidifies and loses its flowability.Type: ApplicationFiled: September 13, 2005Publication date: May 7, 2009Applicants: Mitsubishi Electric Corporation, CENRRAL JAPAN RAILWAY COMPANY, Idemitsu Kosan co, LTD.Inventors: Yoshifumi Itabashi, Yoshihiro Jizo, Akihiro Fujita, Keizou Yoshikawa, Tsuyoshi Fujimoto, Hiromori Ishihara, Nobuhiko Mizuno, Futoshi Yonekawa, Tomomi Hasegawa
-
Publication number: 20090078150Abstract: A ground coil device for a magnetic levitation railway that can be manufactured with a high productivity and exhibit less fluctuation in strength, reduced weight, and good recyclability, and a process for manufacturing the device. The ground coil device includes a coil conductor covered with a thermoplastic resin molding material containing 100 parts by mass of a thermoplastic resin, from 20 to 200 parts by mass of an inorganic filler, and from 0 to 25 parts by mass of an elastomer. A process for producing the ground coil device for magnetic levitation railway includes filling the thermoplastic resin molding material into a cavity of a metal mold into which the coil conductor is previously inserted, by an injection molding method, to obtain an integrally molded product.Type: ApplicationFiled: March 30, 2006Publication date: March 26, 2009Applicants: IDEMITSU KOSAN CO., LTD., MITSUBISHI DENKI KABUSHIKI KAISHA, CENTRAL JAPAN RAILWAY COMPANYInventors: Tomomi Hasegawa, Futoshi Yonekawa, Akihiro Fujita, Yoshihiro Jizo, Yoshifumi Itabashi, Keizo Yoshikawa, Tsuyoshi Fujimoto, Hiromori Ishihara, Nobuhiko Mizuno
-
Patent number: 6860539Abstract: A window 30 is a two-color molding comprising a transparent section 32 and a frame section 31 integrated with the transparent section 32, the frame section 31 and the transparent section 32 are formed with a first material and a second material respectively, and the first material is a thermoplastic resin with the linear thermal expansion coefficient in the MD direction lower by 1×10?5 to 3×10?5 (mm/(mm.K)) than that of the second material, and also with the MD/TD ratio for the linear thermal expansion coefficient in the range from 0.6 to 1.Type: GrantFiled: April 30, 2003Date of Patent: March 1, 2005Assignees: Idemitsu Petrochemical Co., Ltd., Asahi Glass Company, LimitedInventors: Nobuhiro Watanabe, Tomomi Hasegawa, Akio Ishiguchi
-
Publication number: 20040036315Abstract: A window 30 is a two-color molding comprising a transparent section 32 and a frame section 31 integrated with the transparent section 32, the frame section 31 and the transparent section 32 are formed with a first material and a second material respectively, and the first material is a thermoplastic resin with the linear thermal expansion coefficient in the MD direction lower by 1×10−5 to 3×10−5 (mm/(mm.K)) than that of the second material, and also with the MD/TD ratio for the linear thermal expansion coefficient in the range from 0.6 to 1.Type: ApplicationFiled: April 30, 2003Publication date: February 26, 2004Applicants: IDEMITSU PETROCHEMICAL CO., LTD., ASAHI GLASS COMPANY, LIMITEDInventors: Nobuhiro Watanabe, Tomomi Hasegawa, Akio Ishiguchi