Patents by Inventor Masakatsu Senda
Masakatsu Senda 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: 9317080Abstract: The local cooling unit according to an aspect of the present invention includes a housing having a cavity formed in the housing, an air inlet port which is provided in a bottom surface of the housing and which takes in exhaust heat air from the electronic device, an evaporator which is provided in the housing and which evaporates a refrigerant by heat exchange with air sucked in from the air inlet port to cool the air, the refrigerant passing through an inside of the evaporator, an air outlet port which is provided in a side surface of the housing and which exhausts the air cooled by the evaporator, and a fan which is provided on a side of the air inlet port or a side of the air outlet port of the housing and which moves the air from the air inlet port to the air outlet port.Type: GrantFiled: May 5, 2011Date of Patent: April 19, 2016Assignee: Hitachi, Ltd.Inventors: Teruo Mikami, Tomohiro Yoshida, Masakatsu Senda, Ryoji Shimokawa, Yasuhiro Kashirajima
-
Publication number: 20130317654Abstract: An air-conditioning control system is equipped with: a first client server containing a job management program that manages jobs for multiple electronic devices; a second client server that determines the required amount of cooling on the basis of the power information for the multiple electronic devices that is output from this first client server, and outputs information that controls the operation of multiple air-conditioners; an integrated management server that inputs information from the first and second client servers; and a control board that controls the operation of the air-conditioners on the basis of commands from the integrated management server. An environment optimization control program, which calculates the temperature distribution and airflow in an electronic device facility when the operation of the air-conditioners is controlled on the basis of the input power information for the electronic devices and the required amount of cooling, is installed in the integrated management server.Type: ApplicationFiled: January 18, 2012Publication date: November 28, 2013Applicant: Hitachi, Ltd.Inventors: Yasuhiro Kashirajima, Junichi Ito, Ryoji Shimokawa, Masakatsu Senda
-
Publication number: 20110279976Abstract: The local cooling unit according to an aspect of the present invention includes a housing having a cavity formed in the housing, an air inlet port which is provided in a bottom surface of the housing and which takes in exhaust heat air from the electronic device, an evaporator which is provided in the housing and which evaporates a refrigerant by heat exchange with air sucked in from the air inlet port to cool the air, the refrigerant passing through an inside of the evaporator, an air outlet port which is provided in a side surface of the housing and which exhausts the air cooled by the evaporator, and a fan which is provided on a side of the air inlet port or a side of the air outlet port of the housing and which moves the air from the air inlet port to the air outlet port.Type: ApplicationFiled: May 5, 2011Publication date: November 17, 2011Inventors: Teruo Mikami, Tomohiro Yoshida, Masakatsu Senda, Ryoji Shimokawa, Yasuhiro Kashirajima
-
Publication number: 20110271695Abstract: A cooling method for an electronic device, comprising: naturally circulating a refrigerant between: an evaporator which vaporizes the refrigerant by heat exchange with exhaust hot air from the electronic device, and cools the exhaust hot air; and one of a cooling tower and a condenser which is placed at a position higher than the evaporator, and liquefies the vaporized refrigerant; and valve-controlling a flow rate of a refrigerant liquid to be supplied to the evaporator so that an air temperature after heat has been exchanged for cooling by the evaporator becomes a temperature suited to an operating environment of the electronic device, wherein one of a condensation temperature and a condensation pressure of a refrigerant gas in one of the cooling tower and the condenser do not fluctuate even when the flow rate of the refrigerant liquid to be supplied to the evaporator is valve-controlled.Type: ApplicationFiled: May 3, 2011Publication date: November 10, 2011Inventors: Yasuhiro KASHIRAJIMA, Junichi Ito, Yasuhiko Inadomi, Masakatsu Senda, Ryoji Shimokawa, Noboru Oshima, Takumi Sugiura
-
Patent number: 8018636Abstract: A medium 1, that is a laminated holographic medium of the present invention is composed of two or more core layers 2; 3 or more cladding layers 3 set so as to bind the core layers 2; one or more diffraction grating layers 4 storing information data and set at a boundary between a portion of the core layers 2 and the cladding layers 3 binding the core layers 2 or set inside the core layers 2; and one or more recording layers 42 storing information data as forms or a refractive index distribution and set at a boundary between a portion of the core layers 2 and the cladding layers 3 binding the core layers 2 or inside the core layers 2 through or without a gap layer.Type: GrantFiled: December 9, 2004Date of Patent: September 13, 2011Assignee: Nippon Telegraph and Telephone CorporationInventors: Tokinobu Mitasaki, Masakatsu Senda, Masahiro Ueno, Takaya Tanabe
-
Publication number: 20110185758Abstract: A cooling system for an electronic apparatus, includes: a casing in which the electronic apparatus is housed; an evaporator which is disposed at a rear surface side of the casing, and cools heat released from the electronic apparatus by a refrigerant; a slide mechanism which connects the casing and the evaporator to be movable in a longitudinal direction with respect to the casing; at least any one of a cooling tower which is provided at a higher place than the evaporator and condenses the refrigerant by cooling of external air and sprinkled water, and a heat exchanger which cools the refrigerant by using chilled water; a circulation line which moves the refrigerant between the evaporator and at least one of the cooling tower and the heat exchanger; and a piping which connects the circulation line and the evaporator, and is extendable and contractible in response to movement of the evaporator.Type: ApplicationFiled: February 3, 2011Publication date: August 4, 2011Inventors: Ryoji SHIMOKAWA, Masakatsu SENDA, Yasuhiro KASHIRAJIMA, Junichi ITO, A sahi NAGATAKIYA
-
Publication number: 20110127027Abstract: A cooling method of an electronic device, the cooling method naturally circulating a cooling medium between an evaporator, which gasifies the cooling medium and cools heat-discharging air from the electronic device by heat exchange with the heat-discharging air, and a cooling tower or a condenser, which is disposed at a higher position than the evaporator and liquefies the gasified cooling medium, and subjecting a flow rate of the cooling-medium liquid supplied to the evaporator to valve control so that a temperature of the air obtained after the heat exchange and the cooling by the evaporator becomes a temperature suitable for an operating environment of the electronic device, wherein the improvement comprises that a condensation temperature or a condensation pressure of the cooling-medium gas in the cooling tower or the condenser is configured to be not varied even when the flow rate of the cooling-medium liquid supplied to the evaporator is subjected to the valve control.Type: ApplicationFiled: December 1, 2010Publication date: June 2, 2011Inventors: Yasuhiro KASHIRAJIMA, Junichi Ito, Yasuhiko Inadomi, Takumi Sugiura, Ryoji Shimokawa, Masakatsu Senda, Noboru Oshima
-
Publication number: 20070146843Abstract: A medium 1, that is a laminated holographic medium of the present invention is composed of two or more core layers 2; 3 or more cladding layers 3 set so as to bind the core layers 2; one or more diffraction grating layers 4 storing information data and set at a boundary between a portion of the core layers 2 and the cladding layers 3 binding the core layers 2 or set inside the core layers 2; and one or more recording layers 42 storing information data as forms or a refractive index distribution and set at a boundary between a portion of the core layers 2 and the cladding layers 3 binding the core layers 2 or inside the core layers 2 through or without a gap layer.Type: ApplicationFiled: December 9, 2004Publication date: June 28, 2007Applicant: Nippon Telegraph and TelephoneInventors: Tokinobu Mitasaki, Masakatsu Senda, Masahiro Ueno, Takaya Tanabe
-
Patent number: 7046892Abstract: A holographic medium is formed of an optical waveguide including at least one core layer positioned between at least one portion of a material having a lower refractive index, a diffraction grating layer formed at a boundary between the core layer and the material of lower refractive index or in the core layer, and a storage layer outside the optical waveguide. Upon storing information in the storage layer a reference beam and an object are input into the optical waveguide and in retrieving stored information the reference beam is emitted to an end face of the core layer and transmitted through the core layer to be transformed into a diffracted beam in a diffraction grating layer that is emitted outside the core layer and transmitted through the storage layer, where the object beam is retrieved as a retrieved beam.Type: GrantFiled: June 19, 2002Date of Patent: May 16, 2006Assignee: Nippon Telegraph and Telephone CorporationInventors: Hiroshi Yoshikawa, Yasuko Andoh, Keiichiro Itoh, Masakatsu Senda, Yoshiaki Kurokawa, Takaya Tanabe
-
Publication number: 20060062040Abstract: An optical memory medium includes at least one multi-layered waveguide hologram ROM that uses diffracted light based on incident light to a multi-layered waveguide hologram to read out data, and at least one memory that is integrally constituted with the multi-layered waveguide hologram ROM and is used to read and write data. A reproduction apparatus for the optical memory medium includes a light inputting unit for inputting light into the multi-layered waveguide hologram of the optical memory medium, a light receiving element for receiving light diffracted by the multi-layered waveguide hologram from the light input by the light inputting unit and for converting into an electric signal, and a data record reproduction unit for reading and writing data with respect to the memory of the optical memory medium.Type: ApplicationFiled: September 16, 2004Publication date: March 23, 2006Applicant: Nippon Telegraph And Telephone CorporationInventors: Hisanobu Dobashi, Akinori Furuya, Masakatsu Senda, Hiroshi Yoshikawa, Shogo Yagi, Hideki Sakamoto
-
Publication number: 20030026542Abstract: A holographic medium comprising an optical waveguide including at least one core layer positioned between portions having a lower refractive index; a diffraction grating layer formed at a boundary between the core layer and the above portions or in the core layer; and a storage layer outside the optical waveguide. An optical waveguide having the above structure in which the diffraction efficiency of the diffraction grating layer has a specific distribution is useful. In multiple-angle storage, a reference beam is emitted from an end face of a core layer or from the upper or lower side of the medium and a photodetector may be used, so as to control the incident angle. The reference beam and/or the optical waveguide is moved so that the reference beam couples only with a specific diffraction grating layer. The object beam may be focused onto a small target area of the storage layer.Type: ApplicationFiled: June 19, 2002Publication date: February 6, 2003Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hiroshi Yoshikawa, Yasuko Andoh, Keiichiro Itoh, Masakatsu Senda, Yoshiaki Kurokawa, Takaya Tanabe
-
Patent number: 5990417Abstract: Electromagnetic noise absorbing material and filter, which are small, light, and effective even with respect to unwanted electromagnetic waves of a few hundred MHz or more, are provided. A small and flexible electromagnetic noise filter cable and tape-shaped electromagnetic noise filter, as well as a manufacturing method and manufacturing apparatus therefor, are also provided. The electromagnetic noise absorbing material has a thickness or particle diameter of the alloy magnetic substance which is within a range of from 1/10 to 10 times the skin depth thereof, and thereby, a large eddy current loss can be generated, so that it is possible to manufacture electromagnetic noise filters having various shapes, which are small, light, and which realize a large electromagnetic noise suppression effect as a result of eddy current loss, and these possess a large relative magnetic permeability even at levels of a few hundred MHz or more.Type: GrantFiled: June 6, 1994Date of Patent: November 23, 1999Assignee: Nippon Telegraph and Telephone CorporationInventors: Masakatsu Senda, Toshinori Mori, Osamu Ishii, Yasuhiro Koshimoto, Tomoyuki Toshima
-
Patent number: 5811971Abstract: In a magnetic field sensing method in accordance with the invention of the present application, a magnetic sensor comprising a conductor and at least one magnetic material provided on any of the surfaces of this conductor, is employed. This magnetic sensor is disposed in the vicinity of an external magnetic field which is to be sensed, and by means of supplying a high frequency current to this conductor, the impedance of the conductor changes in accordance with the external magnetic field, and based on this, the external magnetic field is sensed.Type: GrantFiled: January 29, 1996Date of Patent: September 22, 1998Assignee: Nippon Telegraph and Telephone CorporationInventors: Masakatsu Senda, Osamu Ishii, Yasuhiro Koshimoto, Tomoyuki Toshima
-
Patent number: 5734267Abstract: In a magnetic field sensing method in accordance with the invention of the present application, a magnetic sensor comprising a conductor and at least one magnetic material provided on any of the surfaces of this conductor, is employed. This magnetic sensor is disposed in the vicinity of an external magnetic field which is to be sensed, and by means of supplying a high frequency current to this conductor, the impedance of the conductor changes in accordance with the external magnetic field, and based on this, the external magnetic field is sensed.Type: GrantFiled: January 29, 1996Date of Patent: March 31, 1998Assignee: Nippon Telegraph and Telephone CorporationInventors: Masakatsu Senda, Osamu Ishii, Yasuhiro Koshimoto, Tomoyuki Toshima
-
Patent number: 5705926Abstract: In a magnetic field sensing method in accordance with the invention of the present application, a magnetic sensor comprising a conductor and at least one magnetic material provided on any of the surfaces of this conductor, is employed. This magnetic sensor is disposed in the vicinity of an external magnetic field which is to be sensed, and by means of supplying a high frequency current to this conductor, the impedance of the conductor changes in accordance with the external magnetic field, and based on this, the external magnetic field is sensed.Type: GrantFiled: April 12, 1996Date of Patent: January 6, 1998Assignee: Nippon Telegraph and Telephone CorporationInventors: Masakatsu Senda, Osamu Ishii, Yasuhiro Koshimoto, Tomoyuki Toshima