Hitachi, Ltd.

Hitachi-ge Nuclear Energy, Ltd.

Setsuo Arita

Tetsuo Ito

Yukiharu Ohga

Takao Sato

Yuji Ichinose

Koichi Kawaguchi

Hiroshi Seki

Fumio Murata

Hiroyuki Yuchi

Satoshi Suzuki

Atomi Noguchi

Akira Kaji

Yukio Nagaoka

Nao Saito

Mitsuru Kudo

Yoshihiko Ishii

Hideaki Masuko

Hideyuki Sato

Wataru Kitaura

Yuichi Higashikawa

Yuuzi Yamasawa

Shinji Murata

Yasuhiro Nakatsuka

Satoru Ito

Shigeru Izumi

Yoshikazu Ishii

Naoyuki Yamada

Tadaaki Ishikawa

Hiroyuki Akiyama

Ryota Kamoshida

Takaharu Fukuzaki

Atsushi Fushimi

Daisuke Shinma

Masaki Kanada

Yasuo Nishizawa

Shin Hasegawa

Hiroshi Ujita

Shigenobu Yanai

Kenichi Katono

Kazunori Ayabe

Yukio Sagawa

Kazuhiko Ishiii

Tetsuo Ito, Deceased

Atsutoshi Mizuide

Masao Miyake

Fumiyasu Ohkido

Kohyu Fukunishi

Fumiyasu Ookido

Shunsuke Utena

Daisuke Sinma

An operator of a nuclear plant is provided with an action margin time up to the execution of a next action to be performed in response to a detected accident based on sensor signals received from sensors for the plant. The operator is provided with a displayed graph showing the received sensor signals, estimated sensor signals for the future, the action margin time and an action threshold value corresponding to the next action. Accordingly, the operator can readily grasp how much time is available to perform the next action before the received sensor signals are predicted to exceed the action threshold value.

Operation assistance apparatus at time of accident in plant

Arrangements with wireless transmitter having: transmission operation processing unit allocating first header information (FHI) including physical address (PA) information to a header, allocates first data error checking code (FDECC) for detecting an error of FHI, second header information (SHI) as redundant header information of FHI, second data error checking code (SDECC) for detecting an error of SHI, divides data field into cell units, and adds third error checking code to each cell, to generate the communication frame; and a wireless transmission unit. A wireless receiver with: wireless receiving unit receiving the frame; reception operation processing unit checking if errors exists in FHI based on FDECC allocated to data field, and if an error, further checks if error in SHI based on SDECC, and if no error, generates a predetermined PA by using SHI, and judges if received communication frame is addressed to own wireless receiver based on generated predetermined PA.

Wireless communications device and wireless communications method

Disclosed is a wireless communications device with strong realtime performance, giving rise to no latency in communications even if communications errors arise in the communication frame MAC header. MAC header information is used to determine whether or not the destination address of a received data frame is the address of a concerned wireless communications device (). MAC header information allocated among a plurality of MAC headers is employed in selecting MAC header information without errors. If all MAC header information is in error, a majority determination processing unit () is used to effect a majority determination of the MAC header information and generate correct MAC header information. A received data extraction unit () removes the received frame header, etc., extracts the received data, and outputs same to an external device.

A communication system in trains comprises a control data communication deviceand an image data communication deviceinstalled in each of the cars. The control data communication devicetransmits train operation information, train location information, control instructions of train-mounted apparatuses, and the like. The image data communication devicetransmits image information such as moving images and still images, audio information such as in-train announcement, textual information for caption display, and operation log information of apparatuses, which form the contents, to a display unitinstalled in each of the cars and to apparatusessuch as a telephone. The display unitswitches the display on the screen in accordance with train control information transmitted from the control data communication devicethrough the image data communication device

Communication system in trains

In order to provide a reactor power control apparatus which can maintain a stable water level when reactivity control based on control rod operation and water level adjustment is performed, this invention comprises a turbine control which calculates the load set error signal from the error between the set target generator power value and the generator power that was fed back and outputs to the turbine control apparatus; control rod control in the natural circulation boiling water reactor which calculates the control rod operation signal and outputs it to the control rod drive control apparatus; water level control inside the natural circulation boiling water reactor which calculates the water level set signal and outputs it to the feed water control apparatus; and the switch determining device which selectively outputs one of the control rod control and water level control based on the generator power that was fed back, the reactor power and water level, as well as switching rules and determination values.

Reactor power control apparatus of a natural circulation boiling water reactor and a feed water control apparatus and nuclear power generation plant

Using a network in which one master station modemand multiple slave station modemare physically connected by rudder connection or bus connection with a telecommunication line, the measurement result of the S/N ratio between the master station and slave stations is once collected in the master station at the initialization stage, pairs of the modulation method, by which all modems can demodulate at high probability, and transmission voltage are calculated based on this data, and the calculation is transmitted to all slave stations; and at a normal transmission stage, information regarding the coordination and control of the network is transmitted in accordance with this setting. Thus, one-to-multi communication is realized, guaranteeing an access right.

Control and monitoring telecommunication system and method of setting a modulation method

A communication apparatus installed in the trains and that in a complex station building, a station or a maintenance factory communication through feeders, trolley wires or third rails can communicate each other. The present invention can realize a low cost vehicle-facility intra communication system that provides various information services available in the train.

Communication apparatus, communication method and installation method of railway vehicle-facility intra communication system

A pointer remotely points a display screen of a large screen display device. The display screen is picked up by a monitor camera. An image processing unit extracts a feature of the pointer used for pointing based on the resulting image signal to identify the position of the pointing point and the pointer based on the feature. A computer generates information on an object to be displayed at a position pointed by the pointer. The generated information is displayed on a display device (CRT display device or large screen display device) assigned to the pointer. Even when a plurality of pointers are used, the information on the object to be displayed pointed by the pointer is properly displayed.

Information presentation apparatus and information display apparatus

In an apparatus for operating and monitoring a plant, a manipulating device provides the plant with manipulation signals for operating the plant. In response to information supplied from the plant and a manipulating signal of the manipulating device, a first display data producing device produces first display data needed for the operation of the plant changing every moment. On the basis of data supplied from the first display data producing device, a first display device displays information relating to the operation of the plant. In response to information supplied from the plant and a manipulating signal of the manipulating device, a second display data producing device produces data needed for monitoring the plant. On the basis of data supplied from the second display data producing device, a second display device displays information relating to the monitoring of the plant on a larger display screen than that of the first display device. Information displayed by the first display device and information displayed by the second display device complement each other and make it possible to accurately operate and monitor the plant.

Plant operating and monitoring apparatus

Disclosed is an information processing system having a neural processing unit, an expert system for executing an inference using a rule, and an information selection unit. The neural processing unit and the expert system being arranged in parallel to each other. The information selection unit selects and outputs necessary information from the information outputted from the neural processing unit and the expert system. Since necessary information is selected and outputted from the information obtained from the neural processing unit and the expert system as a result of processing executed by the neural processing unit and the expert system in the parallelly different points of view, the certainty of the information to be selected is improved.

Information processing apparatus having a neural network and an expert

Each character string information obtained based on each information inputted by the CRT touch input device and the speech input device respectively is integrated by the input control unit and the memory. The input information analyzing unit analyses the integrated character string information. The output information generating unit generates presentation information corresponding to the demand information obtained by the analysis and outputs this presentation information to the display device. Since the input information from each input device is converted into character string information and it is integrated together and is then analyzed, input information is not restricted by each input device and each input device can be used in a free combination when information is inputted.

Information processing apparatus using pointing input and speech input

An alarm system in a plant for outputting a plurality of alarms with respect to devices constituting the plant and monitor information with respect to the devices. In the system, there is provided a unit for storing a table for correspondingly relating a plurality of alarm items to suppression reason items indicating that the display of the alarms can be suppressed. A generated alarm item and a generated event are specified by receiving the plurality of alarms and monitor information. A decision is made by reference to the table as to whether the generated alarm suppression reason item exists in the monitor information, the kind of generated alarm, and the generated event for each generated alarm item. An instruction is given to a display unit to suppress the display of alarms in which a decision is made that the suppression reason item exists.

Automatic alarm display processing system in plant

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Hitachiota, Japan

Setsuo Arita