Patents by Inventor Fumiyuki Suzuki

Fumiyuki Suzuki 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: 11478123
    Abstract: A control apparatus controls an operation of a self-propelled mechanism of an endoscope. The control apparatus includes a drive circuit that outputs a motor current, a motor current detection circuit that acquires a value relating to magnitude of the motor current as a detection value, a storage circuit that stores a limit value relating to the detection value, and a control circuit that performs an operation as a first controller that controls the drive circuit so as to stop the motor when it is determined that the detection value exceeds a value relating to the limit value, and performs an operation as a second controller that controls the drive circuit so as to stop the motor when it is determined that the detection value exceeds the value relating to the limit value.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: October 25, 2022
    Assignee: OLYMPUS CORPORATION
    Inventors: Takashi Suzuki, Fumiyuki Onoda, Takashi Yamashita, Yasuaki Natori, Yoshitaka Umemoto, Toshihiro Kumagai, Takuro Onda
  • Publication number: 20220082169
    Abstract: A steam valve having a first inclined surface, which is formed at the distal end portion of a valve rod and in which the outer diameter of the valve rod increases from the distal end toward the base end of the valve rod, and a second inclined surface, which is formed on the inside of a portion of a main valve that is positioned on the base-end side of the valve rod and which inclines with the same inclination angle as the first inclined surface. In a state in which a slave valve and the main valve are closed the first inclined surface and the second inclined surface are separated from each other, and when the slave valve and the main valve are in a fully open state the first inclined surface and the second inclined surface abut each other.
    Type: Application
    Filed: December 26, 2019
    Publication date: March 17, 2022
    Applicant: Mitsubishi Power, Ltd.
    Inventors: Shingo Nishida, Megumu Tsuruta, Fumiyuki Suzuki, Masaki Hata
  • Patent number: 11066956
    Abstract: An on-off valve of the present invention includes a valve box which includes an inlet flow path of steam and an outlet flow path which communicates with the inlet flow path through a communication bole, a stop valve body which opens or closes the communication hole, and a stop valve support portion, in which the outlet flow path extends in a direction intersecting the opening direction of the communication hole toward a downstream side in a flow direction of the steam, and a minimum wall thickness of the valve box is smaller than a minimum wall thickness of the valve box.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: July 20, 2021
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Tomoyuki Onishi, Fumiyuki Suzuki, Kensuke Futahashi, Hao Li
  • Patent number: 10732595
    Abstract: Provided is a control parameter automatic-adjustment apparatus that adjusts a control parameter which is used when a control apparatus of a plant calculates an operational control signal, the apparatus including: a simulator that simulates operation of the plant; a learning unit that searches for an optimal control parameter using the simulator; and a knowledge database that stores knowledge information which associates an amount of change in the control parameter with an amount of change in a state of the plant, in which the learning unit includes a search range determination unit that determines a control parameter search range based on the knowledge information that is stored in the knowledge database.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: August 4, 2020
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Yuya Tokuda, Takaaki Sekiai, Yasuhiro Yoshida, Takuya Yoshida, Kazunori Yamanaka, Norihiro Iyanaga, Fumiyuki Suzuki
  • Publication number: 20190383169
    Abstract: An on-off valve of the present invention includes a valve box which includes an inlet flow path of steam and an outlet flow path which communicates with the inlet flow path through a communication bole, a stop valve body which opens or closes the communication hole, and a stop valve support portion, in which the outlet flow path extends in a direction intersecting the opening direction of the communication hole toward a downstream side in a flow direction of the steam, and a minimum wall thickness of the valve box is smaller than a minimum wall thickness of the valve box.
    Type: Application
    Filed: February 15, 2018
    Publication date: December 19, 2019
    Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Tomoyuki Onishi, Fumiyuki Suzuki, Kensuke Futahashi, Hao Li
  • Patent number: 10385736
    Abstract: There is provided a combined cycle power plant in which a high-pressure steam turbine and an intermediate-pressure steam turbine can operate in a state where amounts of thermal effect thereof are close to a limit value, and capable of reducing start-up time. A combined cycle power plant includes: an exhaust heat recovery boiler that includes a high-pressure superheater which superheats steam for a high-pressure steam turbine, and a reheater which reheats steam for an intermediate-pressure steam turbine; bypass pipes through which steam bypasses the high-pressure superheater and the reheater; bypass valves that regulate flow rates of steam which flows through the bypass pipes; and a bypass controller that controls the bypass valves such that a difference between thermal effect-amount margins of the turbines is decreased.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: August 20, 2019
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Tatsuro Yashiki, Yasuhiro Yoshida, Takuya Yoshida, Miyuki Kawata, Eunkyeong Kim, Kazunori Yamanaka, Norihiro Iyanaga, Fumiyuki Suzuki
  • Patent number: 10301974
    Abstract: An activation control apparatus permits activating a steam turbine safely at high speed in response to a power generation plant state. A heat source apparatus heats low-temperature fluid to generate high-temperature fluid, and steam generation equipment generates steam by thermal exchange with the high-temperature fluid. A steam turbine is driven by the steam, and an adjustment apparatus adjusts a plant operation amount. A thermal effect amount prediction calculation device calculates a prediction value for a thermal effect amount for use for activation control of the steam turbine, and a changeover device decides, based on a state value of the power generation plant, the sensitivity of the thermal effect amount to a variation of the plant operation amount and outputs a changeover signal in accordance with the sensitivity. Based on the changeover signal, an adjustment device calculates the plant operation amount so as not to exceed a predetermined limit value.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: May 28, 2019
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Yasuhiro Yoshida, Takuya Yoshida, Tatsuro Yashiki, Kazunori Yamanaka, Fumiyuki Suzuki, Norihiro Iyanaga
  • Patent number: 9863283
    Abstract: A steam turbine power plant includes a life consumption amount calculator configured to calculate life consumption amounts of a turbine rotor based on a value measured by a measurer, a thermal stress limit update timing determining device configured to determine a time when thermal stress limits are updated, an accumulated life consumption amount calculator configured to calculate accumulated life consumption amounts of the turbine rotor when the thermal stress limits are updated, a planned life consumption amount setting device configured to set planned life consumption amounts of the turbine rotor based on the accumulated life consumption amounts of the turbine rotor, a thermal stress limit calculator configured to calculate and update the thermal stress limits based on the planned life consumption amounts of the turbine rotor, and a plant command value calculator configured to calculate a plant command value based on the thermal stress limits.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: January 9, 2018
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Tatsuro Yashiki, Yukinori Katagiri, Takuya Yoshida, Miyuki Kawata, Yasuhiro Yoshida, Eunkyeong Kim, Kenichiro Nomura, Kazunori Yamanaka, Fumiyuki Suzuki, Norihiro Iyanaga
  • Patent number: 9771825
    Abstract: Provided is a steam turbine plant activation control device that can flexibly handle an initial state amount of a steam turbine plant and activate a steam turbine at a high speed. The activation control device 21 for the steam turbine plant includes a heat source device 1 configured to heat a low-temperature fluid using a heat source medium and generate a high-temperature fluid, a steam generator 2 for generating steam by thermal exchange with the high-temperature fluid, a steam turbine 3 to be driven by the steam, and adjusters 11, 12, 13, 14, 15 configured to adjust operation amounts of the plant.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: September 26, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Yasuhiro Yoshida, Takuya Yoshida, Tatsuro Yashiki, Yukinori Katagiri, Eunkyeong Kim, Kenichiro Nomura, Kazunori Yamanaka, Fumiyuki Suzuki, Norihiro Iyanaga
  • Publication number: 20170255177
    Abstract: Provided is a control parameter automatic-adjustment apparatus that adjusts a control parameter which is used when a control apparatus of a plant calculates an operational control signal, the apparatus including: a simulator that simulates operation of the plant; a learning unit that searches for an optimal control parameter using the simulator; and a knowledge database that stores knowledge information which associates an amount of change in the control parameter with an amount of change in a state of the plant, in which the learning unit includes a search range determination unit that determines a control parameter search range based on the knowledge information that is stored in the knowledge database.
    Type: Application
    Filed: January 30, 2017
    Publication date: September 7, 2017
    Inventors: Yuya TOKUDA, Takaaki SEKIAI, Yasuhiro YOSHIDA, Takuya YOSHIDA, Kazunori YAMANAKA, Norihiro IYANAGA, Fumiyuki SUZUKI
  • Publication number: 20170254225
    Abstract: A steam turbine plant of the present invention includes a heat source device that heats a low temperature fluid by a heat source medium to obtain a high temperature fluid, a steam generating device that generates steam by heat exchange with the high temperature fluid, a steam turbine that is driven by the steam, a heating flow path that is disposed on an outer surface of a casing of the steam turbine, a high temperature fluid supply passage that is branched from a flow path of the high temperature fluid in the steam generating device, is connected to the heating flow path, and supplies the high temperature fluid to the heating flow path, and a high temperature fluid flow rate regulating device that regulates a flow rate of the high temperature fluid flowing through the high temperature fluid supply passage.
    Type: Application
    Filed: January 27, 2017
    Publication date: September 7, 2017
    Inventors: Eunkyeong KIM, Yasuhiro YOSHIDA, Takuya YOSHIDA, Tatsuro YASHIKI, Miyuki KAWATA, Kazunori YAMANAKA, Norihiro IYANAGA, Fumiyuki SUZUKI
  • Publication number: 20170022847
    Abstract: There is provided a combined cycle power plant in which a high-pressure steam turbine and an intermediate-pressure steam turbine can operate in a state where amounts of thermal effect thereof are close to a limit value, and capable of reducing start-up time. A combined cycle power plant includes: an exhaust heat recovery boiler that includes a high-pressure superheater which superheats steam for a high-pressure steam turbine, and a reheater which reheats steam for an intermediate-pressure steam turbine; bypass pipes through which steam bypasses the high-pressure superheater and the reheater; bypass valves that regulate flow rates of steam which flows through the bypass pipes; and a bypass controller that controls the bypass valves such that a difference between thermal effect-amount margins of the turbines is decreased.
    Type: Application
    Filed: July 20, 2016
    Publication date: January 26, 2017
    Inventors: Tatsuro YASHIKI, Yasuhiro YOSHIDA, Takuya YOSHIDA, Miyuki KAWATA, Eunkyeong KIM, Kazunori YAMANAKA, Norihiro IYANAGA, Fumiyuki SUZUKI
  • Publication number: 20170002690
    Abstract: An object of the invention is to provide an activation control apparatus by which a steam turbine can be activated safely at a high speed in response to a state of a power generation plant.
    Type: Application
    Filed: June 28, 2016
    Publication date: January 5, 2017
    Inventors: Yasuhiro YOSHIDA, Takuya YOSHIDA, Tatsuro YASHIKI, Kazunori YAMANAKA, Fumiyuki SUZUKI, Norihiro IYANAGA
  • Patent number: 9422826
    Abstract: A start control unit for a steam turbine plant, wherein inputting a measured value of a steam temperature fed to a steam turbine, a measured value or an estimated value of a rotor temperature of the steam turbine, and a measured value of a casing temperature of the steam turbine, and controlling a steam flow rate so as to increase the steam flow rate fed to the steam turbine when a difference between the steam temperature and the rotor temperature is smaller than a first regulated value and a difference between the rotor temperature and the casing temperature is a second regulated value or larger.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: August 23, 2016
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Eunkyeong Kim, Yasuhiro Yoshida, Takuya Yoshida, Tatsuro Yashiki, Nobuyuki Hokari, Kenichiro Nomura, Kazunori Yamanaka, Fumiyuki Suzuki, Masaaki Tomizawa, Yuichi Takahashi
  • Patent number: 9255494
    Abstract: Disclosed is a steam turbine power plant adapted to start operating safely even if prediction accuracy of its startup constraints cannot be obtained. The system calculates predictive values and current values of startup constraints of a steam turbine from process variables of plant physical quantities, next calculates in parallel both a first control input variable for a heat medium flow controller based on predictive values, and a second control input variable for a main steam control valve based on the current values, and while preferentially selecting the first control input variable, if the first control input variable is not calculated, selects the second control input variable instead. After the selection of at least one of the first and second control input variables, the system outputs an appropriate command value to the heat medium flow controller and the main steam control valve according to the kind of selected control input variable.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: February 9, 2016
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Tatsuro Yashiki, Yasuhiro Yoshida, Takuya Yoshida, Naohiro Kusumi, Kazunori Yamanaka, Kenichiro Nomura, Masaaki Tomizawa, Fumiyuki Suzuki, Yuichi Takahashi
  • Patent number: 9249682
    Abstract: Disclosed is a steam turbine power plant adapted to start operating very efficiently by highly accurate look-ahead control of a plurality of its startup constraints.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: February 2, 2016
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Yasuhiro Yoshida, Takuya Yoshida, Tatsuro Yashiki, Kenichiro Nomura, Kazunori Yamanaka, Masaaki Tomizawa, Yuichi Takahashi, Fumiyuki Suzuki
  • Publication number: 20150135712
    Abstract: A steam turbine plant activation control device is provided, which generates an activation schedule that enables a reduction in a time period required for the activation of a steam turbine plant without complex calculation such as prediction and calculation of a temperature and calculation of thermal stress.
    Type: Application
    Filed: November 18, 2014
    Publication date: May 21, 2015
    Inventors: Eunkyeong KIM, Yasuhiro YOSHIDA, Tatsuro YASHIKI, Yukinori KATAGIRI, Takuya YOSHIDA, Kenichiro NOMURA, Kazunori YAMANAKA, Fumiyuki SUZUKI, Norihiro IYANAGA
  • Publication number: 20150121874
    Abstract: Provided is a steam turbine plant activation control device that can flexibly handle an initial state amount of a steam turbine plant and activate a steam turbine at a high speed. The activation control device 21 for the steam turbine plant includes a heat source device 1 configured to heat a low-temperature fluid using a heat source medium and generate a high-temperature fluid, a steam generator 2 for generating steam by thermal exchange with the high-temperature fluid, a steam turbine 3 to be driven by the steam, and adjusters 11, 12, 13, 14, 15 configured to adjust operation amounts of the plant.
    Type: Application
    Filed: November 3, 2014
    Publication date: May 7, 2015
    Inventors: Yasuhiro YOSHIDA, Takuya YOSHIDA, Tatsuro YASHIKI, Yukinori KATAGIRI, Eunkyeong KIM, Kenichiro NOMURA, Kazunori YAMANAKA, Fumiyuki SUZUKI, Norihiro IYANAGA
  • Publication number: 20150121872
    Abstract: Providing a steam turbine power plant that can be safely activated at a high speed while maintaining thermal stress at a level equal to or lower than a limit in consideration of operational results of the plant, and a method for activating the steam turbine power plant.
    Type: Application
    Filed: November 4, 2014
    Publication date: May 7, 2015
    Inventors: Tatsuro YASHIKI, Yukinori KATAGIRI, Takuya YOSHIDA, Miyuki KAWATA, Yasuhiro YOSHIDA, Eunkyeong KIM, Kenichiro NOMURA, Kazunori YAMANAKA, Fumiyuki SUZUKI, Norihiro IYANAGA
  • Publication number: 20140373540
    Abstract: A start control unit for a steam turbine plant, wherein inputting a measured value of a steam temperature fed to a steam turbine, a measured value or an estimated value of a rotor temperature of the steam turbine, and a measured value of a casing temperature of the steam turbine, and controlling a steam flow rate so as to increase the steam flow rate fed to the steam turbine when a difference between the steam temperature and the rotor temperature is smaller than a first regulated value and a difference between the rotor temperature and the casing temperature is a second regulated value or larger.
    Type: Application
    Filed: June 25, 2014
    Publication date: December 25, 2014
    Inventors: Eunkyeong KIM, Yasuhiro YOSHIDA, Takuya YOSHIDA, Tatsuro YASHIKI, Nobuyuki HOKARI, Kenichiro NOMURA, Kazunori YAMANAKA, Fumiyuki SUZUKI, Masaaki TOMIZAWA, Yuichi TAKAHASHI