Patents by Inventor Shogo Miyajima
Shogo Miyajima 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: 9057352Abstract: A wave power generation device for synchronizing a vertical movement of a float with all the wave periods, and a method of controlling the same. The device has a controller which controls a torque of a power generator, and the controller is configured to estimate a displacement and a speed of a float from data of a rotation number or a rotation speed of the power generator, to estimate a wave period from the displacement and the speed, and to determine a displacement coefficient corresponding to the wave period from a data table stored in advance, and to transmit a calculated product of the displacement coefficient and the displacement as a torque command to the power generator so as to control a torque of the power generator.Type: GrantFiled: January 16, 2014Date of Patent: June 16, 2015Assignee: MITSUI ENGINEERING & SHIPBUILDING CO., LTD.Inventors: Kunio Nakano, Hiroyuki Nakagawa, Shogo Miyajima, Takashi Kawaguchi
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Publication number: 20140197637Abstract: A wave power generation device which eliminates addition of an adjustment mechanism relating to a change in a mass or a shape to a float and an external sensor such as a wave meter and can improve power generation efficiency by synchronizing a vertical movement of the float with all the wave periods while a manufacturing cost of the wave power generation device is suppressed and a method of controlling the same are provided.Type: ApplicationFiled: January 16, 2014Publication date: July 17, 2014Applicant: MITSUI ENGINEERING & SHIPBUILDING CO., LTD.Inventors: Kunio Nakano, Hiroyuki Nakagawa, Shogo Miyajima, Takashi Kawaguchi
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Patent number: 7866630Abstract: To provide a winding mechanism and a trawling apparatus capable of eliminating an excessive tension or slack generated in a wire wound around a drum and keeping the tension or wire length of the wire constant. A winding mechanism with tension control function includes a reversibly rotatable liquid-pressure motor rotating a drum having a wire wound therearound, a liquid-pressure pump coupled directly with the liquid-pressure motor and supplying hydraulic oil, and an electric motor rotating to drive the liquid-pressure pump. The winding mechanism further includes a control unit controlling a torque of the electric motor based on a variation in load current of the electric motor and winding off or winding up the wire to keep the tension of the wire at a set value.Type: GrantFiled: January 17, 2006Date of Patent: January 11, 2011Assignees: Mitsui Engineering & Shipbuilding Co., Ltd., Tsurumi Seiki Co., Ltd., Dai-Ichi Electric Co., Ltd.Inventors: Shuji Ueki, Hirohumi Doi, Shogo Miyajima, Kenzo Hasegawa, Hiroshi Satoh
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Patent number: 7775383Abstract: A hoisting device can be small-sized and energy can be saved. A hoisting device 10 according to the present invention has a hoist 30 and a control unit 32. The hoist 30 rotates a drum 12 having a wire 14 wound thereon by an oil pressure motor 42 rotatable in normal and reverse directions. To the oil pressure motor 42, operating oil is supplied from an oil pressure pump 44. The oil pressure pump 44 is a two-way discharge fixed capacity type, and rotated by a servomotor 46. An acceleration/displacement transducer 34 in the control unit 32 finds a moving direction and a moving speed of a wire hanging point in the vertical direction from an output signal of an acceleration sensor 24.Type: GrantFiled: December 30, 2008Date of Patent: August 17, 2010Assignees: Mitsui Engineering & Shipbuilding Co., Ltd., Tsurumi Seiki Co., Ltd., Dai-Ichi Electric Co., Ltd.Inventors: Shuji Ueki, Hirohumi Doi, Shogo Miyajima, Kenzo Hasegawa, Hiroshi Satoh
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Patent number: 7681748Abstract: A hoisting device can be small-sized and energy can be saved. A hoisting device 10 according to the present invention has a hoist 30 and a control unit 32. The hoist 30 rotates a drum 12 having a wire 14 wound thereon by an oil pressure motor 42 rotatable in normal and reverse directions. To the oil pressure motor 42, operating oil is supplied from an oil pressure pump 44. The oil pressure pump 44 is a two-way discharge fixed capacity type, and rotated by a servomotor 46. An acceleration/displacement transducer 34 in the control unit 32 finds a moving direction and a moving speed of a wire hanging point in the vertical direction from an output signal of an acceleration sensor 24.Type: GrantFiled: April 18, 2005Date of Patent: March 23, 2010Assignees: Mitsui Engineering & Shipbuilding Co., Ltd., Dai-Ichi Electric Co., Ltd., Tsurumi Seiki Co., Ltd.Inventors: Shuji Ueki, Hirohumi Doi, Shogo Miyajima, Kenzo Hasegawa, Hiroshi Satoh
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Publication number: 20090166309Abstract: A hoisting device can be small-sized and energy can be saved. A hoisting device 10 according to the present invention has a hoist 30 and a control unit 32. The hoist 30 rotates a drum 12 having a wire 14 wound thereon by an oil pressure motor 42 rotatable in normal and reverse directions. To the oil pressure motor 42, operating oil is supplied from an oil pressure pump 44. The oil pressure pump 44 is a two-way discharge fixed capacity type, and rotated by a servomotor 46. An acceleration/displacement transducer 34 in the control unit 32 finds a moving direction and a moving speed of a wire hanging point in the vertical direction from an output signal of an acceleration sensor 24.Type: ApplicationFiled: December 30, 2008Publication date: July 2, 2009Applicants: MITSUI ENGINEERING & SHIPBUILDING CO., LTD., TSURUMI SEIKI CO., LTD., DAI-ICHI ELECTRIC CO., LTD.Inventors: Shuji Ueki, Hirohumi Doi, Shogo Miyajima, Kenzo Hasegawa, Hiroshi Satoh
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Publication number: 20080164365Abstract: To provide a winding mechanism and a trawling apparatus capable of eliminating an excessive tension or slack generated in a wire wound around a drum and keeping the tension or wire length of the wire constant. A winding mechanism with tension control function includes a reversibly rotatable liquid-pressure motor rotating a drum having a wire wound therearound, a liquid-pressure pump coupled directly with the liquid-pressure motor and supplying hydraulic oil, and an electric motor rotating to drive the liquid-pressure pump. The winding mechanism further includes a control unit controlling a torque of the electric motor based on a variation in load current of the electric motor and winding off or winding up the wire to keep the tension of the wire at a set value.Type: ApplicationFiled: January 17, 2006Publication date: July 10, 2008Applicants: MITSUI ENGINEERING & SHIPBUILDING CO., LTD., TSURUMI SEIKI CO., LTD., DAI-ICHI ELECTRIC CO., LTD.Inventors: Shuji Ueki, Hirohumi Doi, Shogo Miyajima, Kenzo Hasegawa, Hiroshi Satoh
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Publication number: 20050242332Abstract: A hoisting device can be small-sized and energy can be saved. A hoisting device 10 according to the present invention has a hoist 30 and a control unit 32. The hoist 30 rotates a drum 12 having a wire 14 wound thereon by an oil pressure motor 42 rotatable in normal and reverse directions. To the oil pressure motor 42, operating oil is supplied from an oil pressure pump 44. The oil pressure pump 44 is a two-way discharge fixed capacity type, and rotated by a servomotor 46. An acceleration/displacement transducer 34 in the control unit 32 finds a moving direction and a moving speed of a wire hanging point in the vertical direction from an output signal of an acceleration sensor 24.Type: ApplicationFiled: April 18, 2005Publication date: November 3, 2005Applicants: MITSUI ENGINEERING & SHIPBUILDING CO., LTD., TSURUMI SEIKI CO., LTD., DAI-ICHI ELECTRIC CO., LTD.Inventors: Shuji Ueki, Hirohumi Doi, Shogo Miyajima, Kenzo Hasegawa, Hiroshi Satoh