Patents by Inventor Tohru Akatsu
Tohru Akatsu 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: 9740195Abstract: To further optimize an operation of a power plant. The system has a storage cell which charges utilizing surplus electric power generated by a power plant 10 and a database 23 which accumulates at least information on power consumption for each power plant apparatus 11 (hereinafter, described as an in-plant apparatus). An integrated controller 225 compares power consumption of the power plant apparatus 11 in operation in the case of executing each function among a plurality of functions and an electric discharge capacity of the storage cell, and selects an executable function within a range of the electric discharge capacity of the storage cell. Then, it controls to execute the selected function utilizing electric power supplied from the storage cell.Type: GrantFiled: September 20, 2013Date of Patent: August 22, 2017Assignee: Hitachi, Ltd.Inventors: Katsuhide Kitagawa, Kazuyasu Asakura, Tohru Akatsu, Hiroto Takeuchi
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Patent number: 9223309Abstract: A monitoring apparatus has: an abnormality detecting unit which can detect an abnormality of a self apparatus; a second communication unit for receiving state information through a second communication network; a plant information forming unit for forming plant information as information regarding the whole plant equipment based on a plurality of state information; a first communication unit for transmitting the plant information to a maintenance tool through a first communication network; and an abnormal-case control unit constructed in such a manner that when the abnormality detecting unit detects the abnormality, a substituting request is transmitted to the other control unit, when a response to the substituting request is affirmative, an operation of the self apparatus is stopped, and when the response to the substituting request is negative or when the response to the substituting request is not received, the state information is transferred to the maintenance tool.Type: GrantFiled: January 30, 2013Date of Patent: December 29, 2015Assignee: Hitachi, Ltd.Inventors: Takahiro Yamada, Yoshio Maruyama, Tohru Akatsu
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Publication number: 20150277437Abstract: To further optimize an operation of a power plant. The system has a storage cell which charges utilizing surplus electric power generated by a power plant 10 and a database 23 which accumulates at least information on power consumption for each power plant apparatus 11 (hereinafter, described as an in-plant apparatus). An integrated controller 225 compares power consumption of the power plant apparatus 11 in operation in the case of executing each function among a plurality of functions and an electric discharge capacity of the storage cell, and selects an executable function within a range of the electric discharge capacity of the storage cell. Then, it controls to execute the selected function utilizing electric power supplied from the storage cell.Type: ApplicationFiled: September 20, 2013Publication date: October 1, 2015Applicant: Hitachi, Ltd.Inventors: Katsuhide Kitagawa, Kazuyasu Asakura, Tohru Akatsu, Hiroto Takeuchi
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Patent number: 8930000Abstract: This invention includes a control device and a maintenance support device. The maintenance support device included in the plant monitor and control device selects temporary setting target logic element among logic elements contained in a control logic data, generates a temporary setting target logic element data, and generates a temporary setting logic element parameter data in accordance with a value of logic element parameter inputted by an operator. The control device memorizes the temporary setting target logic element data sent from the maintenance support device as the temporary setting target logic element data, and also the logic element parameter data before the temporary setting corresponding to the logic element designated by the temporary setting target logic element data among the logic element parameter data.Type: GrantFiled: March 10, 2011Date of Patent: January 6, 2015Assignee: Hitachi, Ltd.Inventors: Takahiro Yamada, Yoshio Maruyama, Tohru Akatsu
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Patent number: 8374708Abstract: A control apparatus for a plant system has data input/output units for inputting measured data obtained from a plant and a control command for the plant, a data transmission unit for transmission of data between a control unit and a plant monitor unit which are coupled to each other through a network, and a stimulated data mass setting and cancelling unit for performing mass setting of data handled by the data input/output unit and/or data handled by the data transmission unit to simulated data managed in the form of a list table by means of a maintenance tool and performing mass cancelling of the stimulated data set in the list table.Type: GrantFiled: April 7, 2010Date of Patent: February 12, 2013Assignee: Hitachi, Ltd.Inventors: Takahiro Yamada, Yoshio Maruyama, Tohru Akatsu
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Publication number: 20110224806Abstract: This invention includes a control device and a maintenance support device. The maintenance support device included in the plant monitor and control device selects temporary setting target logic element among logic elements contained in a control logic data, generates a temporary setting target logic element data, and generates a temporary setting logic element parameter data in accordance with a value of logic element parameter inputted by an operator. The control device memorizes the temporary setting target logic element data sent from the maintenance support device as the temporary setting target logic element data, and also the logic element parameter data before the temporary setting corresponding to the logic element designated by the temporary setting target logic element data among the logic element parameter data.Type: ApplicationFiled: March 10, 2011Publication date: September 15, 2011Inventors: Takahiro YAMADA, Yoshio Maruyama, Tohru Akatsu
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Publication number: 20100262306Abstract: A control apparatus for a plant system has data input/output units for inputting measured data obtained from a plant and a control command for the plant, a data transmission unit for transmission of data between a control unit and a plant monitor unit which are coupled to each other through a network, and a stimulated data mass setting and cancelling unit for performing mass setting of data handled by the data input/output unit and/or data handled by the data transmission unit to simulated data managed in the form of a list table by means of a maintenance tool and performing mass cancelling of the stimulated data set in the list table.Type: ApplicationFiled: April 7, 2010Publication date: October 14, 2010Inventors: Takahiro Yamada, Yoshio Maruyama, Tohru Akatsu
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Patent number: 7292897Abstract: A multiplexing control system has a common process input/output unit for distributing process signals from sensors for measuring the same state variable of a process to digital controllers. One process input/output unit for inputting/outputting a process signal between the multiplexing control system and plant is provided for each process signal. The process input/output unit for the process signal of high importance is triplexed. A process controller having an operating function is provided to each of the triplexed process input/output units. A process input/output unit for the process signal of intermediate importance is diplexed. A process input/output unit for the process signal of low importance is monoplexed. The process signals of the diplexed process input/output units and the monoplexed process input/output unit are controlled by a controller having a master right among the process controllers.Type: GrantFiled: November 26, 2003Date of Patent: November 6, 2007Assignee: Hitachi, Ltd.Inventors: Kazuhiko Miura, Shoei Takahashi, Kazuyasu Asakura, Yoshio Maruyama, Katsuhito Shimizu, Yukiko Mori, Tohru Akatsu
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Patent number: 7292896Abstract: A multiplexing control system has a common process input/output unit for distributing process signals from sensors for measuring the same state variable of a process to digital controllers. One process input/output unit for inputting/outputting a process signal between the multiplexing control system and plant is provided for each process signal. The process input/output unit for the process signal of high importance is triplexed. A process controller having an operating function is provided to each of the triplexed process input/output units. A process input/output unit for the process signal of intermediate importance is diplexed. A process input/output unit for the process signal of low importance is monoplexed. The process signals of the diplexed process input/output units and the monoplexed process input/output unit are controlled by a controller having a master right among the process controllers.Type: GrantFiled: February 26, 2001Date of Patent: November 6, 2007Assignee: Hitachi, Ltd.Inventors: Kazuhiko Miura, Shoei Takahashi, Kazuyasu Asakura, Yoshio Maruyama, Katsuhito Shimizu, Yukiko Mori, Tohru Akatsu
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Publication number: 20040114509Abstract: A multiplexing control system has a common process input/output unit for distributing process signals from sensors for measuring the same state variable of a process to digital controllers. One process input/output unit for inputting/outputting a process signal between the multiplexing control system and plant is provided for each process signal. The process input/output unit for the process signal of high importance is triplexed. A process controller having an operating function is provided to each of the triplexed process input/output units. A process input/output unit for the process signal of intermediate importance is diplexed. A process input/output unit for the process signal of low importance is monoplexed. The process signals of the diplexed process input/output units and the monoplexed process input/output unit are controlled by a controller having a master right among the process controllers.Type: ApplicationFiled: November 26, 2003Publication date: June 17, 2004Inventors: Kazuhiko Miura, Shoei Takahashi, Kazuyasu Asakura, Yoshio Maruyama, Katsuhito Shimizu, Yukiko Mori, Tohru Akatsu
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Publication number: 20030137998Abstract: A multiplexing control system has a common process input/output unit for distributing process signals from sensors for measuring the same state variable of a process to digital controllers. One process input/output unit for inputting/outputting a process signal between the multiplexing control system and plant is provided for each process signal. The process input/output unit for the process signal of high importance is triplexed. A process controller having an operating function is provided to each of the triplexed process input/output units. A process input/output unit for the process signal of intermediate importance is diplexed. A process input/output unit for the process signal of low importance is monoplexed. The process signals of the diplexed process input/output units and the monoplexed process input/output unit are controlled by a controller having a master right among the process controllers.Type: ApplicationFiled: November 12, 2002Publication date: July 24, 2003Inventors: Kazuhiko Miura, Shoei Takahashi, Kazuyasu Asakura, Yoshio Maruyama, Katsuhito Shimizu, Yukiko Mori, Tohru Akatsu